com-138-ast-6025-ts_part3

1HM0.154.301Shanghai Huaming Power Equipment Co., Ltd.

TYPE CM O

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TECHNICAL DATA

TYPE CM

OIL-IMMERSED ON-LOAD TAP CHAGNER

SHANGHAI HUAMING POWER EQUIPMENT CO., LTD.


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Contents

1. General 3

2. Technical Specification4

3. Model Designation 5

4. Technical Performance Parameter7

5. Special Designs10

6. Motor Drive Unit12

7. Controllers for On-Load Tap Changer13

8. OLTC Accessories13

9. Appendixes14

9.1 CM III 500Y/600Y without change-over selector, overall dimensions15

9.2 CM III 500Y / 600Y with reversing switch, overall dimensions16

9.3 CM III 500Y / 600Y with coarse change-over selector, overall dimensions17

9.4 CM II 500 / 600 without change-over selector, overall dimensions18

9.5 CM II 500 / 600 with reversing switch, overall dimensions19

9.6 CM II 500 / 600 with coarse change-over selector, overall dimensions20

9.7 CM I 500 / 600 without change-over selector, overall dimensions21

9.8 CM I 500 / 600 with reversing switch, overall dimensions22

9.9 CM I 500 / 600 with coarse change-over selector, overall dimensions23

9.10 CM I 800 without change-over selector, overall dimensions24

9.11 CM I 800 with reversing switch, overall dimensions25

9.12 CM I 800 with coarse change-over selector, overall dimensions26

9.13 CM I 1200 / 1500 without change-over selector, overall dimensions27

9.14 CM I 1200 / 1500 with reversing switch, overall dimensions28

9.15 CM I 1200 / 1500 with coarse change-over selector, overall dimensions29

9.16 CM OLTC mounted with tie-in resistor, overall dimensions 30

9.17 CM Tap selector contacts arrangement31

9.18 CM OLTC head flange for standard tank type, overall dimensions32

9.19 CM OLTC head flange with pressure relief valve, overall dimensions33

9.20 Transformer connection flange for CM OLTC, overall dimensions34

9.21 CM OLTC head flange installation for bell-type, overall dimensions35

9.22 Upper gear unit, arrangement and swiveling range36

9.23-1 CM OLTC arrangement drawing-137


9.24 CM OLTC, general layout drawing39

9.25 Bevel gear unit, overall & installation dimensions40

9.26 CM I 800 / 1200 / 1500 OLTC,

parallel connection plate of tap selector terminals, overall dimensions41

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Shanghai Huaming Power Equipment Co., Ltd.

9.27 Protective relay, overall & installation dimensions42

9.28 CM OLTC with multiple coarse and fine tap selector, connection drawing43

9.29 CM III 500Y/600Y with multiple coarse and fine tap selector, overall dimensions44

9.30 CM I 500/600 with multiple coarse and fine tap selector, overall dimensions45

9.31 CM I 800 with multiple coarse and fine tap selector, overall dimensions46

9.32 CM I 1200/1500 with multiple coarse and fine tap selector, overall dimensions47

9.33 CM(10070) operating position table and connection diagram48


9.35 CM(10071W) operating position table and connection diagram50




9.39 CM(10191G) operating position table and connection diagram54


















9.57 CM(10491G) connection diagram72

9.58 CM( 10491G) operating position table73


9.60 CM(12591G) operating position table75






9.66 CM(181071G) operating position table81


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1. General

Type CM On-Load Tap Changer (hereinafter referred as CM or CM OLTC) is a typical combined-structure tap

changer applicable in oil-immersed transformer, comprising of two major parts: diverter switch and tap selector.

The CM OLTC is put in transformer oil tank and its diverter switch has a separate oil compartment from

transformer tank, while tap selector, together with transformer windings, is completely laid inside the tank.

OLTCs installation is divided into two types - standard tank flange and bell-type flange.

Three-phase CM OLTC could be used at neutral point of star-connection, and a combination of three units of

single-phase CM OLTC is designed for any selectable winding connection.

Basic connections of tap winding as in fig.1

a) Without change-over selector b) With reversing switch c) With coarse tap selector

Fig.1 Basic Connections of Tap Winding

a) without change-over selector

This linear regulation can be designed by a maximum of 9, 11,13,15 or 17 steps, namely 10, 12,14,16 or 18

operating positions at maximum.

b) with change-over selector

With reversing switch or coarse tap selector, the regulating range will be doubled to maximum 9, 11,

13,15 or 17 steps, namely 19,23,27,31 or 35 operating positions at maximum, when actual positions

are less than above mentioned ones, it can be easily obtained passing by the positions.

c) Multiple coarse tap selector

With multiple coarse tap selector , CM OLTC can be reached to maximum 106 steps, i.e. 107 operation

positions at maximum.

d) Multiple linear voltage regulation

A special design of tap selector can make OLTC have up to maximum 33 steps, i.e. 34 operation positions at

maximum.

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2. Technical Specification

Type CM OLTC complies with IEC60214-1 (2003), please refer to below table 1.

Tabe1 CM Series OLTC Main Technical Specifications

Item

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Specification

Max. rated through-current (A)

Rated frequency

Connection

Max. rated step voltage (V)

Rated step capacity (kVA)

Short-circuit withstand

current (kA)

Oil

compartment

of diverter

switch

CM 500Y

CM 500

500

1400

8

20

CM 600Y

CM 600

600

1500

8

20

CM1200

1200

3100

24

60

CM1500

1500

3500

24

60

Insu

latio

n to g

round

(kV

)

4 grades of B, C, D and DE according to insulation level

Not less than 800,000 operations

Not less than 200,000 operations

0.03Mpa

No leakage under 0.06Mpa for 24 hours

Bursting cap busts at 300 20%kPa

Oil flow speed set at 1.0m/s 10%

SHM-I or CMA7

ZXJY-1 /ZXJY-2 /ZXJY-3 according to requirement

CM800

800

2000

16

40

50 or 60

Three-phases for neutral point of star connection

Single-phase for any selectable winding connection

3300

18 (special linear regulation can be up to 34)

35 (special multiple coarse regulation can be up to 107)

72.5

140

350

126

230

550

170

325

750

252

460

1050

Without change-over selector

With change-over selector

Highest voltage for

equipment Um

Rated power frequency

withstand voltage(50Hz,1min )

Rated lightning impulse

withstand voltage ( 1.2/50s )

Max. Operating

Positions

Thermal (3s)

Dynamic (Peak)

Tap selector

Mechanical life

Contact life

Motor drive unit

Oil filter plant

Service pressure

Leakage test

Over pressure protection

Protection relay


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3.2 Designation of basic connection diagram of tap selectorThe tap selector may have different spec with respect to the number of the steps required and connection of

the tap winding. The basic connection diagrams reflects the relevant pitch of the contact circuit, the number

of operating positions, the number of mid-positions and type of change-over selector. The designation of the

basic connection diagram is according to Fig.3.

Fig.2 Designation of CM OLTC

Fig.3 Designation of Basic Connection Diagram of Tap Selector

CM III - 600 Y / 126 D - 10193W

Basic connection diagram of tap selector

Tap selector insulation grade

Highest voltage for equipment

connection mode: Y for regulation at neutral point

Max .rated through current

Number of phase

Type

10 19 3 W

Change-over selector (W: with reversing switch; G: with

coarse tap selector)

Number of Mid-position (divided into 0, 1, 3)

Max.operating positions (depends on with or without

change-over selector, max.up to 107)

Tap selector pitch (divided into 10, 12, 14, 16, and 18)

3. Model Designation

3.1 Model designationType CM OLTC models varies with number of phase, maximum.rated through current, highest voltage for

equipment, insulation level of tap selector and connection ways, etc.The parameters are represented as in

Fig.2 below.

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Fig.4 Survey of Basic Connection Diagram of Tap Selector

3.3 Survey of basic connection diagram of tap selectorDifferent numbers of taps correspond to different connection diagram. Fig.4 shows regular basic connection

diagrams of the tap selector, and special design depends on the requirement.

steps

steps

steps

steps steps

steps steps

steps

stepsstepssteps

steps steps steps stepssteps

steps steps

steps steps

steps steps

step

sst

eps

step

s

step

s

step

s

step

sst

eps

step

s

step

sst

eps

step

s

step

s

step

s

step

s

step

sst

eps

step

s

step

s

step

s

step

s

step

s

step

s

step

s

step

s

step

s

step

s

step

s

step

s

step

s

step

s

steps steps

steps steps steps steps

steps steps


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4. Technical Performance Parameter

4.1 Through currentRated through current ( Iu) : The current flowing through an on-load tap-changer towards the external circuit,

which the apparatus is capable of transferring from one tap to the other at the relevant rated step voltage and

which can be carried continuously while meeting the requirements of the standard.

Max. rated though-current (Ium): The highest rated through-current for which the tap-changer is designed for

and which forms the basis for all current related tests.

4.2 Step voltageRated step voltage (Ui): For each value of rated through-current, the highest permissible voltage between

terminals which are intended to be connected to successive taps of the transformer.

Maximum rated step voltage (Uim): The highest value of the rated step voltage for which the tap-changer is

designed. The maximum rated step voltage of type CM is 3300 volt.

4.3 Rated step capacity PstnThe step capacity equals to product of step voltage multiplied by current. While the rated step capacity of

OLTC is a permissible maximum step capacity during continuous operation. That is Pstn=Ui Iu,The rated step

capacity refers to fig.5.

Fig. 5 Curve of The Rated Step Capacity of CM OLTC

4.4 Breaking capacityThe breaking capacity refers to the maximum switching capacity under the safe changeover load, according

to IEC60214-1(2003) stipulation, 40-time breaking switches shall be performed at a current corresponding to

twice the maximum rated through-current (Ium) and at its relevant rated step voltage(Ui).

The breaking capacity of CM OLTC: Pstmax = 2Pstn 2IumUstn

Pstn: Rated step capacity

Ium: Max. rated through current

Ustn: relevant step voltage

Ui Rated step voltage

Iu Rated through current

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4.6 Short-circuit withstand currentAccording to IEC60214-1(2003), All contacts of different design carrying current continuously shall be subject

to short-circuit currents, each of 2s (10 %) duration, at the conclusion of the test, the contacts shall not have

been damaged such as melting, deformation or mechanical damage. Thereinto three applications shall be

made with an initial peak current of 2.5 ( 5 %) times the r.m.s. value of the rated short-circuit test current.

Please refer to Table 1 CM Series OLTC Main Technical Specifications for detailed values.

4.7 Conditions for OLTCs operations4.7.1 Oil temperature for OLTCs operation ranges from -25 to 105.4.7.2 Ambient temperature for OLTCs operation ranges from -25 to 40.4.7.3 The vertical inclination level of OLTC being installed into transformer towards ground should be less

than 2%

4.7.4 The installation site should be free of heavy dust, explosive or corrosive gas.

Note: For more severe environment condition, please confirm with us before ordering.

4.8 Internal insulation levelThe internal insulation of CM OLTC is divided into four levels from low to high: B, C, D and DE.The withstand

voltage is different between adjacent taps, max. and min. taps and between phases for tap changers with

different insulation grade, Fig.7 shows the potential distribution of various parts after tap changer has been

connected to voltage regulation winding. Table 2 gives CM OLTC power frequency withstand voltages and BIL

values according to different insulation distance.

4.9 Insulation level to groundThe insulation level to ground refers to insulation of OLTC live parts against grounding parts, the rated value

of which depends on power frequency withstand voltage test for 1 minute and lightning impulse withstand

voltage test. please refer to table 3, and which is stipulated in the IEC-60214-1(2003).

The requirement of insulation to earth for OLTC is relevant to OLTC connection location at transformer tap

winding, regulation range and mode, tap winding connection model and structure, as well as the rated voltage

of transformer tap winding, anyhow, it is determined by insulation to ground of transformer voltage regulating

winding.

Fig.6 Average Expected Contact Life under Average Load Condition

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Iu/Ium

600 000

n

500 000

400 000

300 000

200 000

100 000

4.5 Electrical life of arcing contactThe main expected electrical life of the arcing contacts can be estimated based on the relevant load (Iu/Ium)

shown in below fig.6, whereas actual burn of arcing contacts may depend on many influencing factors such as

contact material, matching of transition resistance, operation status and so on, fig.6 is only an approximate

value of contact life.

n: number of operation

Iu: Rated through current

Ium: Maximum rated through current


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10 10 0 18 18 0 10 09 1W 18 17 1W10 19 1W 18 35 1W10 19 3W 18 35 3W

10 19 1G 18 35 1G10 19 3G 18 35 3G

10 10 0 18 18 0 10 09 1W 18 17 1W10 19 1W 18 35 1W10 19 3W 18 35 3W

10 19 1G 18 35 1G10 19 3G 18 35 3G

1. Linear regulation 2. With reversing switch 3. With coarse change-over selector

4. Diverter switch

Fig. 7 The Rated Voltage Stress on Tap Winding

Explanation of designation code:

a: across regulation winding for the same phase

a1: between any selected and preselected taps of the tap selector

b: between any two taps of different phases

a0: between any adjacent taps of diverter switch

c1: between the beginning of coarse tap winding and neutral of fine tap winding of the same phase

c2: between beginnings of coarse tap winding of different phases

d: between begining and end of coarse tap winding of the same phase

SF: spark gap

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Table 3 Insulation Level to Ground of OLTC

The highest voltage for equipment

Um

72.5

126

170

252

Rated power frequency withstand

voltage(50Hz, 1 min.)

140

230

325

460

Rated lightning impulse withstand

voltage (1.2/50?s)

350

550

750

1050

(unit: kV)

4.10 Installation modelsType CM OLTC is mounted onto the transformer cover by tap changer head, a mounting flange (see appendix)

must be provided by transformer producer for connection. CM OLTC is suitable for either standard tank or

bell-type mounting. For bell-type tank transformer, the OLTC support flange is supplied as a temporary support,

OLTC will be secured onto transformer mounting flange after complete installation of transformer bell-tank.

5 Special Designs

5.1 Potential connection of the tap windingFor high voltage or wide regulation range on-load regulating transformer, during the operation of the change-

over selector the tap winding is disconnected momentarily from the main winding, the regulating section will

be broken away from the main coil and at status of suspend, thus voltage regulating winding will gain the

new potential that depends upon coupling capacities Ce (to ground) and Cw (between adjacent tap winding),

refer to Fig.9. Generally this potential is different from the one of voltage regulating winding before change-

over selector acting, the difference of them is designated as recovery voltage. This recovery voltage is pro-

duced at the breaking point of the separated contacts during the operation of change-over selector. If these

differential voltages exceed a certain limit value, it may cause flashover on change-over selector and bring

gas, it will be the serious problem. Therefore measures regarding potential connection of the winding must be

taken.

Table 2 CM OLTC internal Insulation (unit: kV)

Designation

code

a

b

a0

a1

c1

c2

d

1.2/50s

265

265

90

150

485

495

265

50Hz 1min

50

50

20

30

143

150

50

1.2/50s

350

350

90

150

545

550

350

50Hz 1min

82

82

20

30

178

182

82

1.2/50s

460

460

90

150

590

590

460

50Hz 1min

105

146

20

30

208

225

105

Tap selector size B Tap selector size C Tap selector size D

1.2/50s

550

550

90

150

660

660

550

50Hz 1min

120

160

20

30

230

250

120

Tap selector size DE

a0: The inherent insulation level refers to insulation level with spark gap protection

when full wave voltage impulse is 130kV, the spark gap will response 100%

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Fig.8 Potential Connection by Tie-In Resistor Rp

Fig.9 Arrangement of Winding and Coupling Capacitance.

Tap Winding

Iron Core

HV Winding

LV Winding

CM OLTC could withstand a limit value of bias voltage of 35 kV, when the potential is expected to overrun the

limit value, tap winding should be permanently connected to a fixed potential resistance via a tie-in resistor,

see fig.8. For mounting location and dimensions of CM OLTC tie-in resistors, please refer to appendix 9.16

For calculating the change-over selector stress and dimensioning the tie-in resistors, the following details of

the transformer specifications required when ordering:

a) Complete transformer parameter: rated capacity, rated voltage, voltage regulating range, winding connec-

tion model, insulation level and so on

b) Arrangement of the windings, i.e. the relative position of the tap winding to the adjacent coil or winding parts

c) Operating A.C.voltage across windings or layers of windings adjacent to the tap windings

d) Capacitance of the tap winding to adjacent windings(Cw)

e) Capacitance of the tap winding to ground or grounded adjacent windings (if exist) (Ce)

f) Voltage stress across half the tap winding at lightning impulse voltage test

g) A.C.voltage across half the tap winding under operation and test conditions.( is normally derived from order

specification sheet for tap changer)

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Table 4 Technical Data of Motor Drive Unit

Rated torque on drive shaft (Nm)

Revolution of the drive shaft per switching operation

Revolution of the hand crank per switching operation

Running time per switching operation (S)

Max. operation positions

Voltage for control circuit and heater circuit (V)

Heater power (W)

A.C. voltage test to ground(kV/50Hz,1min)

Approx. weight (kg)

Protective degree

Mechanical endurance (operations)

Note: Please specify if special voltage required for motor, and control & heater circuit.

SHM-I

750

220/AC

4.8

50 or 60

1400

45

16.5

33

About 4

35

220/AC

50

2

73

IP66

Motor

CMA7

750 1100

380/3AC

2.0 2.8

50 or 60

1400

18 26

33

33

About 5

107

220/AC

50

2

90

IP56

Rated power (W)

Rated voltage (V)

Rated current (A)

Rated frequency(Hz)

Rated speed (r.p.m.)

Motor drive unit

Not less than 800,000

Fig.10 Connection Diagram for Multiple CM OLTC Applications

Regulating at Coil End of 3-Phase

Delta Connection

5.2 Special CM OLTC combinations ( 3CMI or CMI+CMII),

driven by one or separated motor drive units and used for

Delta connection of windings or others except neutral point.

OLTC Combination

(CMI+CMII) for the Specific

Delta Connection

Regulating at Middle of 3-

Phase Delta Connection

6. Motor Drive Unit

CM OLTC may operated by SHM-1 or CMA7 motor drive unit according to the requirement, please refer to

table 4 for technical data.

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7. Controllers for On-Load Tap Changer

7.1 HMK7 controller

HMK7 controller is the device for remote control of SHM-1 motor drive unit, it realizes OLTC switching opera-

tion through control SHM-1. HMK7 can display the OLTC switching operation status and tap positions.

HMK7 has BCD code position signal output (contact capacity:AC120V/0.5A or DC28V/1A) and remote control

signal input (non potential contact), it can also communicate with host computer via RS485 interface to realize

remote supervising of OLTC position.

HMK7 main technical data is as below, refer to HMK7 manual for more details.

Working voltage: 220V AC

Power frequency: 50Hz

Maximum operation positions: 35

Environment temperature: -10 to 40 Indoor

7.2 HMC-3C position indicatorHMC-3C OLTC position indicator is a support fitting for CMA7 and CMA9 motor drive unit, it can be used to

indicate the OLTC step, and has the function of 1-N, STOP, N-1 control as well as remote control indica-

tor lamp, its input is decimal code and output is BCD code. Please refer to HMC-3C manual for details.

HMC-3C technical data is as below, refer to manual for more details.

Working voltage: 220V AC

Power frequency: 50Hz

Maximum operation positions: 107

Environment temperature: -10 to 40 Indoor

7.3 Automatic voltage regulator ET-SZ6 and HMK-2AAutomatic voltage regulator ET-SZ6 and HMK-2A is adopted for OLTC automatic voltage regulation, ET-SZ6

can be used for parallel operation in model of master and slave, please refer to relevant manual for details.

8. OLTC Accessories

8.1 Bevel gear unitBevel gear unit is used for connection horizontal shaft and vertical shaft between OLTC body and motor drive

unit, thus driving torque of motor drive unit can be transmitted to on-load tap changer, the overall dimensions

of bevel gear unit is shown on appendix 9.26

8.2 Protective RelayProtective relay is the one of protective devices for oil-immersed on-load tap changer, when OLTC interior

failure produces gas and oil surge, the protective relay contact acts, and switches on to the tripping circuit of

the transformer circuit breaker, the transformer will be cut off at once.

Protective relay is mounted onto the connection pipe between OLTC head and conservator, make sure that

protective relay marked with arrowhead side shall be connected to conservator. Huaming provides two types

of protective relay which are QJ4G-25 (with 1 pair of trip contact) and QJ6-25 (with 2 pairs of trip contact),

please refer to appendix 9.28

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8.3 Pressure relief devicesPressure relief valve and pressure release cover is the security protective device for oil-immersed OLTC,

when OLTC interior fails, oil in oil chamber is gasified and a number of gases produced, thus oil pressure of oil

chamber is increased rapidly, OLTC oil compartment will be deformation even explosion if the pressure inside

is not released in time, therefore, pressure relief device is necessary to install to avoid failures extending.

Pressure relief valve is a auto-sealed valve, when over pressure, the cover is open and pressure will be

released, and then it will close again. It can be used repeatedly, and the liquid lost could be controlled to

minimum volume when it is acting.

Pressure release cover is the weak portion on the OLTC head cover, once oil chamber pressure exceeds

adjusted value, the pressure release cover will be broken, thus over-pressure is released, and OLTC oil

compartment is protected.

Pressure relief valve is a device for low energy failure, and pressure release cover is the device for high

energy failure, whereas most of failure of OLTC body is of high energy failure, so our standard offer is OLTC

equipped with pressure release cover, and pressure relief valve is only provided when customer specifies.

8.4 Oil filter plantOil filter plant is applied to filter out metal particles and uncombined carbon, and moisture from transformer oil

in OLTC oil compartment while OLTC in operation, as a result, OLTC operation reliability has been improved

and maintenance interval will be prolonged. It is proposed that those OLTCs for furnace transformer, rectifica-

tion transformer, which operates in relatively frequent situation, should be fit up with oil filter plant, in addition,

there is a must for those OLTCs in ultra-high voltage transformers to furnish with it.

9. Appendixes

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9.1 CM III 500Y/600Y without change-over selector, overall dimensions

Unit:mm

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9.2 CM III 500Y / 600Y with reversing switch, overall dimensions

Unit:mm

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9.3 CM III 500Y / 600Y with coarse change-over selector, overall dimensions

Unit:mm

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9.4 CM II 500 / 600 without change-over selector, overall dimensions

Unit:mm

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9.5 CM II 500 / 600 with reversing switch,overall dimensions

Unit:mm

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9.6 CM II 500 / 600 with coarse change-over selector, overall dimensions

Unit:mm

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9.7 CM I 500 / 600 without change-over selector, overall dimensions

Unit:mm

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9.8 CM I 500 / 600 with reversing switch, overall dimensions

Unit:mm

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9.9 CM I 500 / 600 with coarse change-over selector, overall dimensions

Unit:mm

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9.10 CM I 800 without change-over selector, overall dimensions

Unit:mm

25


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9.11 CM I 800 with reversing switch, overall dimensions

Unit:mm

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9.12 CM I 800 with coarse change-over selector, overall dimensions

Unit:mm

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9.13 CM I 1200 / 1500 without change-over selector, overall dimensions

Unit:mm

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ER TECHN

ICAL DATA


9.14 CM I 1200 / 1500 with reversing switch, overall dimensions

Unit:mm

29


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA

9.15 CM I 1200 / 1500 with coarse change-over selector, overall dimensions

Unit:mm

HM0.154.301

30

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


9.16 CM OLTC mounted with tie-in resistor, overall dimensions

Unit:mm

31


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA

9.17 CM tap selector contacts arrangement

Unit:mm

HM0.154.301

32

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


9.18 CM OLTC head flange for standard tank type, overall dimensions

I

I

Unit:mm

33


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA

9.19 CM OLTC head flange with pressure relief valve, overall dimensions

I

Unit:mm

HM0.154.301

34

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


9.20 Transformer connection flange for CM OLTC, overall dimensions

Unit:mm

35


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA

9.21 CM OLTC head flange installation for bell-type, overall dimensions

Transformer tank cover Oil suction pipe

Lifting device

sealing gasket

Lifting plate

Unit:mm

HM0.154.301

36

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


9.22 Upper gear unit, arrangement and swiveling range

Unit:mm

37


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


Unit:mm

HM0.154.301

38

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



Unit:mm

39


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA

9.24 CM OLTC, general layout drawing

Unit:mm

HM0.154.301

40

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


9.25 Bevel gear unit, overall & installation dimensions

Unit:mm

41


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA

9.26 CM I 800 / 1200 / 1500 OLTC,

parallel connection plate of tap selector terminals, overall dimensions

CM800 contacts connection drawing CM1200/1500 contacts connection drawing

Unit:mm

Connection plate

HM0.154.301

42

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


9.2

7 P

rote

cti

ve

re

lay,

ove

rall

& i

nsta

llati

on

dim

en

sio

ns

Type Q

J6-2

5 p

rote

ctive r

ela

yT

ype Q

J4G

-25 p

rote

ctive r

ela

y

Un

it:m

m

43


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA

9.28 CM OLTC with multiple coarse and fine tap selector

To meet demand of industrial development, the industrial transformers are needed to provide widely voltage

regulation range, CM OLTC can be designed with 106 steps for multiple and fine regulation.

The general performances of CM on-load tap changer with multiple coarse and fine tap selector is the same

as regular models of CM tap changer.

For CM on-load tap changer with multiple coarse and fine regulation, the number of regulation steps can be

obtained according to combinations of fine taps and coarse taps, see table 5 below

Table 5 Combinations of Fine Taps and Coarse Taps

Principle diagram of wiring

Operationpositions

No. of fine tappositions

No. of coarsetap positions

3

4

5

6

10

29

39

49

59

12

35

47

59

71

14

41

55

69

83

16

47

63

79

95

18

53

71

89

107

Unit:mm

HM0.154.301

44

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


9.29 CM III 500Y/600Y with multiple coarse and fine tap selector, overall dimensions

Unit:mm

45


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA

9.30 CM I 500/600 with multiple coarse and fine tap selector, overall dimensions

Unit:mm

HM0.154.301

46

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


9.31 CM I 800 with multiple coarse and fine tap selector, overall dimensions

Unit:mm

47


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA

9.32 CM I 1200/1500 with multiple coarse and fine tap selector, overall dimensions

Unit:mm

HM0.154.301

48

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


9.33 CM(10070) operating position table and connection diagram

Drawing is shown at the set position

49


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



HM0.154.301

50

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


9.35 CM(10071W) operating position table and connection diagram


51


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



HM0.154.301

52

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA




53


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



HM0.154.301

54

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


9.39 CM(10191G) operating position table and connection diagram


55


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



HM0.154.301

56

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA




57


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



HM0.154.301

58

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA




59


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



HM0.154.301

60

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA




61


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



HM0.154.301

62

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA




63


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



HM0.154.301

64

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA




65


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



HM0.154.301

66

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA




67


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



HM0.154.301

68

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA




69


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



HM0.154.301

70

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA




71


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



HM0.154.301

72

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


9.57 CM(10491G) connectiondiagram

Set position shown in above diagram

73


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA

9.58 CM( 10491G) operating position table

Voltage regulation positions

Fine tap positions

Coarse tap positions

1

1

( Set position)

HM0.154.301

74

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA




75


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA

9.60 CM(12591G) operating position table


Fine tap positions


1

1

( Set position)

HM0.154.301

76

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA




77


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



Fine tap positions


( Set position)

HM0.154.301

78

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA




79


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA



Fine tap positions


( Set position)

HM0.154.301

80

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA




81


TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA

9.66 CM(181071G) operating position table


Fine tap positions


( Set position)

HM0.154.301

84

TYPE CM O

IL-IMM

ERSED ON

-LOAD TAP CH

AGN

ER TECHN

ICAL DATA


SHANGHAI HUAMING POWER EQUIPMENT CO., LTD.

Address: 977 Tong Pu Road, Shanghai, P.R.ChinaPost code: 200333Tel: +86 21- 5270 2715 5270 3965Fax: +86 21- 5270 2715E-mail: [email protected]://www.huaming.com

Printing: September.2009

HM0.460.1802

ZXJY

Shanghai Huaming Power Equipment Co.,Ltd.

OLTC Online Oil Filter Plant Type ZXJY Operation Instructions

HM0.460.1802

HM0.460.1802

CONTENTS

1. General 2

2. Product feature2

3. Technical data 3

4.Installation & test 3

5. Operating instruction 7

6. Maintenance9

7. Trouble shooting12

8. Appendix 12

Appendix 1: Installation schematic diagram 13

Appendix 2: Structure diagram 14

Appendix 3: Overall dimension16

Appendix 4: Circuit diagram 18

Appendix 5: Oil filling and discharge schematic diagram20

Appendix 6: Overall dimension of supporting bracket 21

Appendix 7: Oil line schematic diagram 22

9. Supplement23

1

1. General

1.1 Type ZXJY series online oil filter plant for on-load tap changer is designed by Huamings R&D

team with patented technology. This device is mainly used for circulating and filtering of on-load tap

changer insulating oil. It can remove free carbon and metal debris, as well as reduce water content

in the tap changer oil during normal operation of transformer system ensuring the breakdown

voltage and service life of the oil, improving the safety and reliability of on-load tap changer, which

consequently extends the maintenance intervals.

1.2 There are two models of ZXJY series oil filter plant:

1.2.1 Type ZXJY-1: Mechanical and electrical section are located in the same cabinet.

1.2.2 Type ZXJY-3: Three sets of oil-filter plants can be controlled by one single control module,

while each of the oil-filter plants can be commissioned separately and put into parallel operation.

ZXJY-1 ZXJY-3

1.3 Type ZXJY-1 can be mounted either on the transformers tank side (referred to as wall

mounting type), or on the ground (referred to as ground type). For type ZXJY-3, ground type is

recommended.

1.4 For those projects that the transformer has been in service, and need to add the oil-filter plant

(referred to as retrofit project), please specify the installation method. In case of wall mounting

type installation, we will provide common steel bracket (see appendix 6a) due to the variation of

site condition and transformer tank shape. In case of ground type installation, we will be able to

provide stainless steel supporting bracket (see appendix 6b) with extra charge.

2. Product feature

2.1 Main oil channel is designed with a compact integrated plate style, eliminating pipe connection,

2

HM0.460.1802

thus reduce the sealing area. All the main sealing sections are designed with double sealing style

to increase the sealing factor.

2.2 SIEMENS LOGO control unit is adopted in type ZXJY with many functions such as manual

operation, automatic operation, timing starting, operation time setting, etc., and also with other

functions such as operation time recording, maintenance alarming, etc. In addition, type ZXJY-

1 and ZXJY-3 are equipped with thermostat. If temperature goes below 5 or humidity reaches

80%, heater begins to work, while if temperature reaches to 45, fan starts to operate; in this way

the device can be normally operated in various environments to realize automatic operation without

supervision of operator.

2.3 This type of plant is fitted with two-step filtering process, i.e. first to get rid of debris such as free

carton etc, then to remove moisture from inside. Filtering core in the process is ordered particularly

from USA according to OLTCs unique features. Currently, the plant is equipped with 3m filtering

core and alluminium-alloy made-in chamber as standard. Provided that higher accuracy filtering

core in 1m and stainless steel made-in chamber are required, please specify during order.

2.4 Standard plug connectors are provided with the oil-filter plant, such as: 380 V working power

supply input connector; monitoring signal output connector; input connector of operation command

of on-load tap changer. Length of the cable can be specified according to customers requirement.

During on-site operation, it is very easy to connect the cable plug after proper tightening. (Details

of each connection terminal can be found in operation instructions)

3. Technical data

Motor power: 0.37kW Electric power: 380V/50Hz

Rated flow: 9L/Min Rated pressure: 0.5Mpa

Oil inlet flange: DN25 Oil discharge flange: DN25

Impurity-filter core model: 503M Water-filter core model: 510AQ

Filter core accuracy: 3m Media temperature: -20~100

Ambient temperature: -25~70 Heater power: 30W

WeightZXJY-1 90kg

ZXJY-3 250kg

3

4. Installation & Test

4.1 Installation procedure

The device is filled with certain amount of pressured Nitrogen gas before delivery in order to keep

out moisture. Before installation, please release it by opening sampling valve.

4.1.1 Please refer to Pic.1 and Pic 2 regarding two installation methods (take ZXJY-1 as an

example).

The connection flange dimensions of the oil inlet and outlet of ZXJY oil filter plant are as same

as type CV and CM on-load tap changers produced by Huaming for easy transformer design and

installation.

Wall mounting type Ground type

4.1.2 Design and produce the external connection pipe according to the location of the device on

the transformer, which refer to Appendix I Schematic Installation.

4.1.3. Refer to Appendix I Schematic Installation, connect oil inlet and outlet pipes of the on-load

changer to oil inlet pipe and outlet pipe of this device respectively by the manufactured connection

pipe. (Notice: Dont mix up oil inlet and outlet)

4.1.4. Refer to appendix 1, oil filling and replacing devices must be installed securely in the oil

path. Those include two units of stop valves (valve 1 and 2), two units of three-way connectors, two

units of faucets (valve 3 and 4). These parts can either be prepared by customer or by Huaming if

necessary through specifying the dimensions of relevant interface in the contract.

4.1.5 In case of retrofit project, we will provide all remaining oil filling and replacing device since the

stop valves are present.

4.1.6 We recommend the transformer manufacturer to use hard pipe to connect oil filling and

replacing device with online oil filter plant. For on-site retrofit project, we will provide the 1.5 meter

long flexible pipe as previously agreed.

4

HM0.460.1802

4.2. Test procedure (type ZXJY-1 for instance)

Special note: The transformer manufacturer should test the on-line oil filter plant in the

factory by the following procedures in order to inspect the compatibility and the pipe

leakage condition.

(Please refer to appendix 1 and 2 for the following instruction)

4.2.1 Connect power plug, monitoring & controlling plug and automatic signal plug which are all

with suitable length of cables, respectively to sockets CX1, CX2 and CX3. 380V power can be

supplied through cable CX1 from motor drive unit.

Caution: During connecting, wire N should be connected first.

4.2.2 Make circuit breaker QA and QA1, close control cabinet cover, connect to main power

supply; press the option button according to procedure and select manual operation (Indicator light

for manual operation will be on);

4.2.3. Press down the start button, indicator light for operation is on and motor works (If it fails to

operate, please adjust power phases and try again);

4.2.4. Press down the stop button, indicator light for operation is off and motor stops;

4.2.5. Connect one end of PVC hoses with the outlets of valve 3 and 4 respectively, and inserting

the other end of these hoses into the standby transformer oil drum;

4.2.6. Close valves 1 and 2 on oil-in and oil-out holes of on-load tap changer, opening valves 3 and 4;

Operate oil pump to cycle the oil. After the device is filled with oil, open sampling valves to release

gas (oil will drain out with gas at the same time during release, so please prepare a container to

hold the oil). After the gas in the device is discharged completely, close the sampling valves. Switch

off the device, opening valves 1 and 2, after the gas in the system is discharged completely, close

valves 3 and 4. (Note: Please fill the pipeline from PVC hoses which connects with valve 3 to the

inlet of the oil filter plant with oil before starting the oil pump. If oil does not cycle after operating the

motor, please close the outlet valve of the filter plant and open it after oil is pumped in.)

4.3 Testing method of retrofit project. (ZXJY-1 for instance)

Special note: During on-site installation of oil filter plant, make sure that the transformer is

de-energized. Otherwise, it is considered to violate the operation safety regulation and will

not be able to completely release the gas inside the pipes which will jeopardize the normal

safe operation.

5

4.3.1 Follow the procedure of 4.2.1 to 4.2.4 to verify that there is no error in the local electric motor

operation.

4.3.2. According to appendix 5, apply the seal tape to the taps of the faucet following the direction

of tightening with proper layer thickness. Then, screw the faucet into the 3-way connection. Be

sure to tighten completely so that the final position of the faucet is facing one flange of the 3-way

connection.

4.3.3. Dismantle the original sealing plate and gasket located below the stop valve on the

transformer. Put on a new gasket and install the 3-way connection pipe with the faucet on it. Make

sure that the faucet is facing downwards and both the faucet handle and stop valve handle can be

freely turned without hitting each other.

4.3.4. Connect the 3-way connection and the main body of the filter plant with the weather-proof

flexible pipe; make sure that the sealing on both ends is good and tight. If limited by the on-site

physical space and the main body has to be moved to a farther location, some hard pipes are

allowed to connect between the 3-way connection and the flexible pipe. However, situation like this

should be avoided since we dont provide such hard pipe.

4.3.5. According to appendix 2 (a), loosen the plug screw located on the upper portion of the

filtering core. Open the discharge outlet of the sampling valve, then find a proper container to

collect oil from the sampling valve.

4.3.6. According to appendix 1, open valve 2. Oil inside the on-load tap changer will force the air

inside the pipe to be released from the bleeding plug screw and the sampling valve. Once the oil

starts to bleed through the bleeding plug screw located on the top of the moisture-removing core,

tighten the plug screw. Then, once the oil starts to bleed through the bleeding plug screw located

on the top of the particle-removing core, tighten the plug screw as well. Close the sampling valve

when the oil starts to flow out evenly through it.

4.3.7. According to appendix 1, open the valve 1. Then screw off the small cap of the connecting

pipe on the top head of the on-load tap changer. Release the gas by loosening the bolt. Once the

oil flows out through the bolt instead of air bubble, tighten the bolt and the small cap.

4.3.8. Manually operate the online oil filter plant, release the gas from the gas relay of the on-load

tap changer every ten minutes. Put the plant into operation after the gas completely released.

Attention:

1. On-line operation is not allowed if the plant is not filled with oil;

6

HM0.460.1802

Terminal No. of CX1 Description

1 L1

2 L2

3 L3

4 N

Note: 380V working power can be supplied by motor drive unit. If there is no three-phase 380V power supply in the unit (such as SHM-1 motor drive unit), please connect the power in another way and corresponding cable length please refer to the agreement.

2. The valves on oil outlet must be open before starting;

3. Retrofit project shall clearly specify whether the connecting pipe of the tap changer is

lead down. If not, the user should notify us in advance and prepare enough work time.

5. Operating instruction

5.1 Function descriptions of buttons on the panel of control cabinet (Please refer to section 9 of

Supplement)

5.1.1. There are three touch film buttons on control cabinet panel of oil filter plant: mode, start and

stop.

5.1.2 There are three programs on mode selection button, they are: manual, timing and automatic.

5.1.2.1 If selecting manual mode: Press the starting button to start oil filter plant while press the

stop button to stop it. (If the stop button is not pressed, the oil filter plant will stop automatically

according to the time setting in the system which is 4 hours default setting by manufacturer before

delivery).

5.1.2.2 If selecting the timing mode: The oil filter plant operates automatically within the time set

in the system. (Start and stop automatically) (The set time before delivery is from 0:00 to 4:00 AM

every day).

5.1.2.3 If selecting automatic mode: The oil filter plant will automatically operate when receive

voltage-regulating signal from on-load tap changer. (The setting value before delivery is one hour

filtering for each tap changing operation)

5.2. Explanation of aviation plug terminals

5.2.1. Type ZXJY-1 oil filter plant offers three sockets for user, which are:

CX1 terminal Input interface 380V/3PH/50Hz for 380V working power supply (standard length of

cable is 10 meters);

7

CX2 terminal Output interface for monitoring and controlling signal (standard length of cable is 30

meters);

(Output normally-open independent potential-free contact signal, Contact capacity: AC220V, 1A)


Terminal No. of CX2Description

Regular 5 core Special 7 core

1 1 Signal output terminal of motor operation

2 2Alarm signal output terminal of filter core pressure difference (Alarm

indicators on control cabinet panel will indicate which one is in trouble)

5 3 Common terminal for signal output

5 Remote Start (user provide electrical independent contact)

6 Remote Stop (user provide electrical independent contact)

7Remote Common terminal (user provide electrical independent contact)

(user provide potential-free contact)


1, 2

Operation signal input terminal of the changer, connected to X1-31, 32 terminals of CMA7 or CMA9. For SHM intelligent motor drive unit, please connect to X3-40, 41. if connected to motor drive unit made by other company, user shall connect a pair of normally-open potential-free contacts)

Note: Please specify in the contract if remote control function is requested.

Notes: Cable connected to CX1 shall not be less than 1.5mm2; Cables for CX2 and CX3 shall not be less than 1mm2.

CX3 terminal Input interface for operation command of tap changer (standard length of cable is

10 meters).

(Input normally-opened electrical independent contact signal, Contact capacity: DC24V, 1A)

Special notes: If tap changer is not equipped with independent motor drive unit, i.e. it can

not provide a pair of normally-open potential free contacts, then automatic mode of ZXJY

will not work (such as ZXJY equipped with SYZZ tap changer).

5.2.2 Connection wire of type ZXJY-3 oil filter plant is terminal block; details please refer to

schematic diagram.

5.3. Description for LOGO program adjustment

Timed operation period, manual operation period, automatic operation period and viewing operation

times record can be set in LOGO. Operation period is set before delivery, which are respectively

as follows:

Timed operation period: 0:00 ~ 4:00 each day

Manual operation period: 4 hours for each starting (If do not press the stop button)

8

HM0.460.1802

Automatic operation period: Automatic operation for one hour after receiving each operation signal

from the tap changer (During operation process, if several action signals received from the tap

changer, the continuous operation period will last to one hour after receiving the last signal)

Recording method for reviewing the operation times:

Press ESC button

Press V button and select Set Param

Press OK button

Press V button until display the following:

B23: Pa

Lim=999999

Cnt=000025

(Lim=999999 is the maximum recording times set in the system. If operation times is over 999999,

recount; Cnt=000025 is its operated times)

In addition, the program for setting relevant operation period has been write-protected before

delivery in order to avoid program losing in LOGO and malfunction of the device which are

caused by mishandling. Please make special notes during ordering if you think the program set by

manufacturer is not suitable for your operation.

5.4 Description of oil path

Because Huaming adopts special integrated plate for the oil-filter plant, the pipe layout can not be

revealed in appearance. Therefore oil path diagrams are provided for reference (see appendix 7).

6. Maintenance

Maintenance of on-line oil filter plant should be according to DL/T 574-95 Maintenance guide of

on-load tap changer. Maintenance of tap changer which equips with on-line oil filter should be

according to DL/T 573-95 Maintenance guide of power transformer.

For guaranteeing the service life and safe operation of the equipment, one examination per day is

required during the first week operation, and then two examinations per month after one week of

trial operation. If there is some abnormal operation sound and leakage found during observation,

please immediately stop the device, inspect and solve the problems. In addition, after a long period

of operation, the filter core shall be replaced if pressure difference alarms. The operations of daily

maintenance including sampling oil, oil refill and changing filter cores are described as follows:

(Please refer to Supplement 1 and 2 for the descriptions)

9

6.1 Sampling operation

Open control cabinet of on-line oil filter plant, shut down power supply first, sampling from valve

3 on oil replacement device. After sampling, close valve, turn on power supply and close cabinet

door.

Notice: In the condition that the on-line oil filter plant is in service, there should be no dead corner

and polluted oil in oil outlet pipe of tap changer oil compartment, so sample can be taken directly

from sampling valve 3 of oil outlet pipe.

6.2 Oil refill operation

Open cover of on-line oil filter plant, press pattern selection button of control cabinet and select

manual operation, connect valve 3 with PVC transparent hose. In order to release the air in PVC

hose completely, raise the end of PVC hose and open oil outlet pipe (cock) valve 1. When the

PVC hose filled with oil, insert it into oil drum and observe if there is any air in the PVC hose. After

completely discharging air in the hose, close oil outlet pipe valve 1 and switch on on-line oil filter

plant, refill oil flowing into tap changer oil compartment through PVC hose and on-line oil filter plant

(Please pay attention to prevent oil entering PVC hose). After oil refill, close valve 3, open valve 1,

press pattern selection button of control cabinet, select timing or automatic operation, then close

cabinet door.

6.3 Changing filter core

After a long period of operation, carbohydrates, impurities, water and etc. in the oil will block

filter core, which will cause pressure difference between oil inlet and outlet of the filter core. If the

pressure difference reaches 0.35 Mpa, the system will alarm to inform that the filter core shall be

changed with a new one (There is a control and monitor output terminal on oil filter plant, which

can be directly connected to control display screen). The procedure for changing the core is: shut

down power supply of the oil filter plant, close valve 1 and 2 (see pic.1 & 2) on the oil inlet and

outlet pipes of the on-load tap changer oil compartment, screw off filter cores (see pic.3 & 4); fill the

filter cores with qualified transformer oil, screw on the new filter cores; open valve 1 and 2 on oil

inlet and outlet of oil compartment, open discharge valve until oil overflowing, then close discharge

valve and switch on power supply of oil filter plant.

Attentions:

1. New filter core shall be dried under 905 for 2~4 hours in advance before application,

especially for the filter core for removing moisture;

2. In the condition that the system pressure keeps continuously at 0.5 Mpa and above, or moisture

content in oil remains at high level for a long time, even if there is no alarm, proper inspection and

fault resolution are still necessary, even sometimes change the impurity-removing core or moisture-

removing core;

10

HM0.460.1802

Pic. 1

Pic. 3 Pic. 4

Pic. 2

3. Before oil refill, changing filter core or conducting other adjustment for on-line oil filter plant, it is

necessary to inspect if there is any air within the gas relay of the tap changer. If air exists obviously,

it shall be discharged.

6.4 Please do certain cold-proof measures for the exposed pipes between on-line oil filter plant

and tap changer oil compartment in cold area. Otherwise, oil in the pipe may solidify and it will

affect normal operation seriously.

11

7. Troubleshooting

Trouble Causes Solution

Power light is not on1. Power supply is not connected2. Circuit breaker not make3. Power light is broken

1. Connect power supply2. Close circuit breaker3. Replace with a new button

Does not operate after pressing start button

1. Open phase, wrong phases2. Wrong operation mode3. Button is broken

1. Correctly connect each phase2. Select manual mode3. Replace with a new button

Alarm of impurity removing lights

1. Impurity removing filter core jams2. Low oil temperature

1. Change with a new filter core2. Raise oil temperature

Alarm of water removing lights

1. Water removing filter core jams2. Low oil temperature

1. Change with a new filter core2. Raise oil temperature

Protective relay alarm of tap changer

1. Tap changer failure2. Filter core jams or it is almost out of work3. There are some bubbles in the pipes4. Eddy flow caused by illogical arrangement of pipes

1. Repair the tap changer2. Change with a new filter core3. Discharge the gas from tap changer gas relay4. Check the pipe. 5. Select timing mode

8. Appendix

a) Appendix 1 Installation sketch map

b) Appendix 2 Structure diagram

c) Appendix 3 Overall dimension drawing

d) Appendix 4 Circuit diagram

e) Appendix 5 Oil refill diagram

f) Appendix 6 Overall dimension of supporting bracket

g) Appendix 7 Oil path diagram

12

HM0.460.1802

Appendix 1 Installation sketch map of type ZXJY on-line oil filter plant(Type ZXJY-1 for instance)

Oil refill device

The system must be installed securely in the path

13

Appendix 2a. Structure drawing of type ZXJY-1 on-line oil filter plant

14

HM0.460.1802

Appendix 2b. Structure drawing of type ZXJY-3 on-line oil filter plant

15

Appendix 3a. Overall dimension drawing of type ZXJY-1 on-line oil filter plant

YX

144

965

68.5

233

41.5

1158566

11

941

500

220

32

267

590538518

4-20

CX3 socket

1

A220G10BM A120CW10

ZXJY-1

380V/50HZ

380V Power supply socket (4 cores)

Oil in

Mounting hole

Oil out

X direction Y direction

Tap changer action command socket (2 cores)

CX2 socket

Monitor signal socket (5 cores)

CX1 socket

16

HM0.460.1802

Appendix 3b. Overall dimension drawing of type ZXJY-3 on-line oil filter plant

Unit: mm

100

(300)

40

100

14 4X

115

85204X

364

233

1190

535

148297148160

265

1100

1030

955

17

Appendix 4a. Circuit diagram of type ZXJY-1 on-line oil filter plant

18

HM0.460.1802

Appendix 4b. Circuit diagram of ZXJY-3 on-line oil filter plant

CM

A7

Inpu

t sig

nal (

tap

tran

sfer

)

LOG

O

Pro

gram

mab

le c

ontr

olle

rQ

A1-

3 C

ircui

t bre

aker

QA

4,Q

A5

Circ

uit b

reak

erM

1-3

Oil

pum

p m

otor

M

Fan

mot

orG

KD

P

ower

sup

ply

WK

Te

mpe

ratu

re c

ontr

olle

r

WS

K

The

rmos

tat

KM

1-3

Cur

rent

con

tact

orP

H1-

3 A

nti-r

ever

se-r

otat

ion

rela

yH

E

Hea

ter

MB

F

ilm b

utto

n pa

nel

X1-

3 C

onne

ctio

n te

rmin

alX

C

onne

ctio

n te

rmin

al

Prin

cipl

e dr

awin

g of

oil

filte

r

Ala

rm:

1. D

o n

ot

insp

ect

the

inte

rio

r o

f th

e co

ntr

olle

r b

y u

nq

ual

ifie

d p

erso

nn

el.

2. K

eep

th

e o

il o

utl

et v

alve

op

en b

efo

re s

tart

ing

Failure signal

Serial Communication Interface

Operation signal

Failure signal

Serial Communication Interface

Serial Communication

Interface

Operation signal

Failure signal

Operation signal

Pow

er s

uppl

y38

0V/3

PH

/50H

z

A

Out

put s

igna

l

B

Out

put s

igna

l

C

Out

put s

igna

l

19

Appendix 5. Gateway of oil refill device

Tap changer connecting flange

Downwards connection

Tap changer connecting flange

Downwards connection

Disconnecting valve

Disconnecting valve

Tap

Tap

Three-way valve

Rubber gasket Rubber gasket

Weather-proof flexible pipe

20

HM0.460.1802

Mounting hole of oil filter plant

780

50

590

590

4-22

590

480

500

1000

4-20

590

645

30

50

50

202-

Mounting hole of anchor bolt

Appendix 6 a. Overall dimension of common steel bracket

Appendix 6 b. Overall dimension of floor stand

21

Unit: mm

Appendix 7. Oil path diagram

Tap changer oil compartment

Filter center of on-line oil filter plant

Moisture remove filter core

Gas dischargingplug screw

Gas dischargingplug screw

Impurity remove filter core

Sampling valve

Pressure difference transmitter

M

22

HM0.460.1802

Set clock

SU 00:00

YY.MM.DD

0000.01.01

B11:T

T=04:00h

Ta=00:00

9. Supplement

Dont enter any other modes except mode Set param and Set clock when setting the operating

time, otherwise it will cause program chaos and malfunction of the on-line oil filter plant.

1. If LOGO loses power for continuous 48 hours, the time will disappear and re-setting is required.

The setting method is as following:

Press ESC button

Press V button and select Set Clock

Press OK button

The following will display

Press < > to set current time

Press OK button to confirm

Press ESC to exit

2. Set the operating time


Press ESC button

Press button and select Set Param

Press OK button


Press OK button

Press < > to set required work time


Press ESC to exit

3. Set the timing start of on-line oil filter plant (default setting is 0:00 every morning)

The setting method is as follows:

Press ESC button

Press button to select Set Param

23

B11: operating time module for timing and manual mode

T: continuous operating time

Ta: elapsed runtime of current operation

B24:Par

On=000001

off=000001

Cnt=00000

B11:T

T=04:00h

Ta=00:00

*the setting value of OFF should be as same as ON

Press OK button


B14:No1

D=MTWTFSS

On=00:00

off=00:01

B14: No1

D=M-W-FSS

On=23:00

off=23:01

*the setting time for OFF should be 1 minute longer than ON

*the setting time for OFF should be 1 minute longer than ON

Press OK button, then Press < > to set required time

Example: Start at 23:00 on every Mon, Wed, Fri, Sat, Sun

B14: Clock set module for timing start

B24: Counter module of start times

Press until it displays the following:

24

B11:T

T=04:00h

Ta=00:00

Press button until the following displays:

Press OK to confirm, then press ESC to exit

4. Frequency setting of the tap changer operation which triggers the automatic operation of the on-

line oil filter plant (The default setting is one cycle of oil filtering for each tap changing operation)


Press ESC button

Press button and selecting Set Param

Press OK button


HM0.460.1802

B24:Par

On=000003

off=000003

Cnt=000000

B11:T

T=04:00h

Ta=00:00

B19:T

T=30:00m

Ta=00:00

*the setting value of OFF should be as same as ON

Press OK button

Press < > to set required times

Example: One cycle of filtering for every three tap changing operations


Press ESC to exit

5. Setting the time of automatic operation (The default setting is 1 hour)


Press ESC button

Press button and select Set Param

Press OK button


Press until the following is shown:

Press OK button

Press < > to set required length of time


Press ESC to exit

Example: Set 60 minutes for each oil filtering

25

B19: Timing module of automatic operation

T: continuing operating time

Ta: elapsed runtime for the current operation

B19:T

T=30:00m

Ta=00:00

Press OK to confirm

Press ESC to exit

Shanghai Huaming Power Equipment Co., Ltd.Address: No 977 Tong Pu Road, Shanghai 200333, P.R.ChinaTel: +86 21 5270 3965 (direct) +86 21 5270 8966 Ext. 8688 / 8123 / 8698 / 8158 / 8110 / 8658Fax: +86 21 5270 2715Web: www.huaming.com E-mail: [email protected]

Printing: October 2010

Elektromotoren und Gertebau Barleben GmbH

1

Transformer Protection Relays (Buchholz Principle)

Elektromotoren und Gertebau Barleben GmbH

2

Content

Item No. Heading Page

Firms history 3

Preface 3

1. Design features 4

2. Function 6

3. Tests 7

4. Type list 8

4.1. Single-float Buchholz relays with thread connection 8

4.2. Single-float Buchholz relays with flange connection 8

4.3. Single-float Buchholz relays possible switching system designs 9

4.4. Double-float Buchholz relays with thread connection 10

4.5. Double-float Buchholz relays with flange connection (round) 11

4.6. Double-float Buchholz relays with flange connection (square) 13

4.7. Buchholz relays according to Chinese norm 13

4.8. Buchholz relays according to French norm 14

4.9. Buchholz relays according to British standard 15

4.10. Double-float Buchholz relays possible switching system designs 16

5. Technical data 20

6. Special designs 21

6.1. Explanations to identif. no. 32 22

6.2. Explanations to identif. no. 60 22

7. Ordering data 23

8. Additional devices for Buchholz relays 24

9. Further protection devices 27

3

Firms history Since its foundation the company has been passed through an eventful history with regard to ownership, affiliation and connected with this changes of firm names. 1863 Foundation of the company as sugar factory 1943 Establishment of SIEMENS Magdeburg 1948 VEB1 Elektromotorenwerk Barleben; VEM (state-owned firm) 1951 VEB1 Starkstromanlagenbau Magdeburg (state-owned firm) 1951 Start of manufacturing Buchholz relays at site in Barleben 1970 VEB1 Elektrotechnik und Gertebau Magdeburg; EGEM (state-owned firm) 1980 VEB1 Kombinat Elektromaschinenbau Dresden VEB1 Elektromotorenwerk Barleben; VEM; ELMO (state-owned firm) 1990 VEM Antriebstechnik AG Dresden Elektromotorenwerk Barleben GmbH; VEM; ELMO (public limited company) 1993 Elektromotoren und Gertebau Barleben GmbH; EMB (privately owned company)

Preface The Buchholz relay was developed in 1921 by Max Buchholz, Oberrat at the Prussian Electric supply company - PLC in Kassel. Since that time it has been an important protection and monitoring device for liquid-cooled transformers and choke coils. It is known for its easy operation, high reliability, maintenance-free operation and extremely long life. It is built in the cooling cycle of the appliances to be protected and responds in the event of troubles like gas accumulation, loss as well as high flow of the insulation liquid. Furthermore single-float Buchholz relays are used as Air Cell Failure Relay for monitoring the tightness of a rubber bag (air bag) inside the expansion vessel. The company has had for more than 50 years experience in producing Buchholz relays and other protection devices for liquid-cooled appliances. It ranks among the most distinguished manufacturers of this kind of equipment. Experiences collected and profound know-how are the sound basis for a high product quality. References from reputed transformer manufacturers and further users are proof of the high level of the products. The company is ISO 9001/2000 certified. The staff of highly qualified engineers and experienced skilled workers do their best to guarantee top quality high-precision products. The mechanical working of the casings is done on modern CNC-controlled machine tools. The final tests, where all the functions of the Buchholz relays are checked, are done with each device by using spec

com-138-ast-6025-ts_part3

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