vip300 protection relay for ringmaster mgmv5477

VIP 300 protection relayfor Ringmaster

2

Providing a wide range ofselectivity and quality of supply

The VIP 300 is a three phase overcurrent and earth faultprotection relay, providing protection for the network andequipment. It is an integral part of the highly successfulRingmaster range of secondary distribution switchgear.The main function of the relay is to detect overcurrentand earth faults within the network and to trip the circuitbreaker.

VIP 300 protection relayProtection relay

Self poweredreliability

The VIP 300protection relay is aself poweredmicroprocessorbased unit whichrequires no externalDC power source orbatteries, making itthe ideal solution forlocation in remoteareas or whereauxiliary supplies arenot available.

3

VIP 300 protection relayBenefits

Reliability

The relay has a self monitoring device anddiagnostic routine which constantly checksthe operation of the relay automatically.

Ease of use

VIP 300 has improved operation and control,with the relay settings being clearlydisplayed on the front panel.Manual reset flags show separate ‘tripped onfault’ for either overcurrent or earth faultconditions.

Flexibility

There are a wide range of settingsavailable. The IDMT (inverse definiteminimum time) characteristics can beadjusted to grade the relay with otherdevices. Fast power up ensures that whenswitched on to a fault the power up timeis less than �30ms.

Testing

The VAP6 hand held test unit, isavailable to provide a simple check ofthe integrity of the relay and can alsoperform trip tests. Circuit breaker “tripinhibit” facility allows the relay to betested without tripping the circuit breakerusing the VAP6. Secondary injection canbe carried out using conventional testequipment.

4

VIP 300 protection relayFeatures

Product CE2, RN2c, RE2c CE6, RN6c

Application transformer ring feeders incomers

200 - 1600kVA 400 - 3800kVA 1900 - 12000kVA

Time Fuse Link

IDMT VIP 300

*Note: a protection coordination study may be necessary to verify the type of protection. Consult your local Merlin Gerin sales engineer if in doubt.

Protection selection guide

Primary current (A) 10 20 80 100 125 200 630

Equivalent transformer rating at 11kV 200kVA 400kVA 1600kVA 1900kVA 2400kVA 3800kVA 12000kVA

Units Application protection

Transformer protection Time Fuse Link

IDMT - VIP 300

Feeder protection IDMT - VIP 300

CE2CN2RN2c,

CE6RN6c

Protection application guide

■ Pick-up current ranges:RN2c, RE2c, CN2, CE2overcurrent : 20A -200Aearth fault : 2A-160A.CE6 and RN6covercurrent : 40A - 400Aearth fault : 4A to 320A.

overcurrent : 80A - 800Aearth fault : 8A to 640A.

■ Hardened electronicsCertified EMC performance to IEC 255and EN 50061, EN50082.

■ Separate overcurrent and earth faulttrip indication.

■ Flashing LED’s indicate when the relaypick-up setting has been exceeded(creep test).

RE2c

5

The Ringmaster range of switchgear comprises non-extensible andextensible ring main units, extensible switches and circuit breakersup to 630A for medium voltage systems up to 13.8kV.

Ringmaster - the total solution

RN2c - 200A non-extensible ring main unit incorporating 2 faultmake/load break switches and a tee-off circuit breaker (transformermounted or free standing).

RE2c - 200A extensible ring main unit incorporating 2 faultmake/load break switches and tee-off circuit breaker (transformermounted or free standing). Available early 2000.

RN6c - 630A non-extensible ring main unit for freestanding networksectionalising.

CN2 - 200A non-extensible circuit breaker (transformer mounted orfree standing).

SN6 - 630A non-extensible switch (transformer mounted or freestanding).

CE2 - 200A extensible circuit breaker (switchboard mounted).

CE6 - 630A extensible circuit breaker (switchboard mounted).

SE6 - 630A extensible switch (switchboard mounted).

MU2 - 200A feeder metering unit (circuit connected, transformermounted or free standing).

Easergy - Telecontrol cabinets (up to four switch control, free-standing, wall or switchgear mounted).

For further details please refer to the Ringmaster range selection guide.

VIP 300 protection relayProtection relay

■ Time Fuse Link

In addition to the VIP 300 relay, Ringmasteris also available with Time Fuse Linkprotection as a low cost option fortransformers. Further details are given in theRingmaster range selection guide.

7

VIP 300 protection relayTechnical specification

Content Page

Use and settingsRelay front panel 8

Curve selection 9

Operating rangesSelection principle 10

ApplicationsRequired setting

information 11

Setting examples 12

Ex. 1 - Ring main unit

protecting an 11kV,

1MVA transformer 13 - 14

Ex. 2 - 200A circuit breaker

protecting an 11kV,

2MVA transformer 15


protecting a radial feeder

of 4MVA at 11kV 16 - 17


protecting a radial feeder

of 8MVA at 11kV 18

Technicalcharacteristics 19

IDMT & DT trippingcurvesStandard inverse 20

Very inverse 21

Extremely inverse 22

Definite time 23

8

VIP 300 protection relayRelay front panel

VIP 300

0.40.20.60.1

0.90.05

1.50.03

to>>(s)

129156

204

off3 (x Is)

0.20.150.30.1

0.40.07

0.60.05

0.40.20.60.1

0.90.05

1.50.03

t>>(s)

129156

204

off3 (x Ios)

2.11.82.41.5

2.71.2

31 (s)

0.20.150.30.1

0.40.07

0.60.05

to>(s)

curve selection

DT onlyIo> Io>>

I>>

Is

4842 5636 64

30 7224 80

20 90100(A)

Ios

2416 3212 40

8 504 60

2 7080(A)

I>

I>

trip

reset

trip

Io>

earth fault

x10

sensors:200/1 4509996A0VIP300LH range: x2

minimum operatingphase current: 20A

phaseovercurrent

x1

EIVISI

offRI

DT (s)

2.11.82.41.5

2.71.2

31 (x Is)

x10

x1

VAP6 test plug

EIVISI

offRI

DT

DT only

curve selection

t>

warning

not timemultiplier

see table

warning

not timemultiplier

see table

VIP 300Settings

Equivalent TimeMultiplier

t>

0.050.070.10.150.20.30.40.050.60.070.10.150.20.30.40.6

to>

x1x1x1x1x1x1x1

x10x1

x10x10x10x10x10x10x10

SI

0.020.020.030.050.070.100.130.170.200.240.340.500.671.011.352.02

VI

0.030.050.070.100.130.200.270.330.400.470.671.001.332.002.674.00

EI

0.060.090.120.190.250.370.500.620.740.871.241.862.483.714.957.43

1 2 3 4 5 7 8 6 9 10

C B A

11 12 13 14 15 17 18 16 19 20

D E

Phase overcurrent setting1. Phase setting area

(upper half of relay front panel).

2. Red LED phase overcurrentpick-up indicator.

3. Phase overcurrent trip indicator.

4. Phase overcurrent setting Is.

5. Choice of low set curve type I>.

6. Low set pick-up (DT only) I>.

7. Low set time delay t>. (@10Is)

8. Multiplying factor (low set).

9. High set pick-up I>>.

10. High set time delay t>>.

Earth fault setting11. Earth fault setting area

(lower half of relay front panel).

12. Red LED earth fault pick-upindicator.

13. Earth fault trip indicator.

14. Earth fault setting current Ios.

15. Choice of low set curve type Io>.

16. Low set pick-up (DT only) Io>.

17. Low set time delay to>. (@10Ios)

18. Multiplying factor (low set).

19. High set pick-up Io>>.

20. High set time delay to>>.

Other functionsA. Current setting scale label.

B. Current transformer andrange information.

C. Indicator reset button.

D. Minimum operating current.

E. VAP6 test plug socket.

9

VIP 300 protection relayCurve selection

Phase overcurrent setting:

The numbers indicated below are thoseof the setting switches (refer to thediagram of the front panel on page 8)The letters indicate the curvecharacteristic as shown opposite.

Phase overcurrent setting:

F ■ Setting current Is (4)

G ■ Type of low set I> curve (5)IDMT: SI, VI, EI, RI.Definite time: DT

H ■ DT low set pick-up I> (6)This setting is only active for thelow set DT curve selection (asshown). If IDMT curves areselected this switch is disabled,as SI,VI, EI, low set pick-up isfixed at 1.2 Is.

J ■ Low set time delay t> (7)and multiplier (8)

K ■ High set I>>(9)

L ■ High set time delay t>>(10)

Earth fault setting:

The principle is the same as for phaseprotection.

Set:

F ■ Setting current Ios (14)

G ■ Type of low setting Io> curve (15)

IDMT: SI, VI, EI, RIDefinite time: DT

H ■ DT low set pick-up Io> (16)This setting is only active for thelow set DT curve selection (asshown). If IDMT curves areselected this switch is disabled,as SI, VI, EI low set pick-up isfixed at 1.2 Is.

J ■ Low set time delay to> (17)and multiplier (18)

K ■ High set Io>>(19)

L ■ High set time delay to>>(20)

Operation:

The high and low set elementsoperate separately. The tripping orderresults from the “logical OR” betweenthe two settings.

Is

SI, VI, EI RIG

F

J

K

Lt>>

1.2 Is 10 Is I>>

t>

IDMT curve selection

DT curve selection

Is

DT G

Lt>>

I>

I>1.2 Is I>>

F

J

K

H

t>

t

t

10

Selection principle

VIP 300 protection relayChoice of operating ranges

The operating range for the VIP 300 is dependent on the current transformer(also referred to as sensor) used, which is determined by the Ringmaster panel typechosen from the selection guide. The relay itself can then be set to either the x2 orx4 range as detailed in the table below.

Sensor CTs available:

Ringmaster 800/1, 400/1 or 200/1 (see Ringmaster selection guide)

Range specified:

VIP 300LH x2 or x4 range

SETTING RANGES x2 x4

Note: Connection must be made to terminals 2, 4, 6 and 8 or terminals 1, 3, 5 and 7for the x2 or x4 setting ranges respectively.

Note: MITOP - trip coil.

VIP 300 IDMT RELAY

P1

P2

S1

S2

C11

MITOP - ITC

S2

CT1

52

P1

P2

S1

S2

P1

P2

S1

S2

C114

5

6

7

8

9

10

C31 C31

C51 C51

C10 C70

C30

C50 C70

C90

8

7

6

5

4

3

2

1

x4 range40A,80Aor 160Aminimumoperatingcurrent

950/51

50N/51N

10

11

12

13

14

1516

0v

YR B

K8 (-Ve)

K7 (+Ve)

C7

1

x2 range20A, 40Aor 80Aminimumoperatingcurrent

1

2

-

-

3

4

Ringmaster range Application Range min operating Protection Current Setting range Example

current Minimum Maximum

RN2c, RE2c, CE2, Transformer x2 20A Overcurrent 20A 100A CN2, 200/1A CT protection earth fault 2A* 80A

x4 40A Overcurrent 40A 200A

earth fault 4A* 160A

RN6c Transformer/ x2 40A Overcurrent 40A 200A

400/1A CT Feeder earth fault 4A* 160A

Protection x4 80A Overcurrent 80A 400A


CE6, RN6c Feeder x2 80A Overcurrent 80A 400A

800/1A CT protection earth fault 8A* 320A

x4 160A Overcurrent 160A 800A


*The earth fault pick-up can be set below minimum operating current but a load current > minimum operating current needs toflow previous to a fault in order to ensure the relay is powered up.

11

VIP 300 protection relayApplication

Selection principles

Required setting information.Prior to making any settings, you need to know:

Ir - rated current of installation to be protected.

Current transformer:The current transformer is specified by the panel type chosen from the Ringmaster

catalogue.

i) Choice of range:To select the minimum operating current and therefore required primary amp

operating range two factors can be considered.

- The load current and any possible allowable overload

(typical allowable overload for transformers is 30%)

- The earth fault level

(typically set at 0.4 times rated current Ir)

It is appropriate to choose the range which will operate above the minimum

operating current. Effectively the relay can be operated below this level, see

minimum operating note.

ii) Choice of curve*:There are 5 types of curve available.

SI - Standard inverse, mainly used for feeder applications.

VI - Very inverse, mainly used for transformer applications.

EI - Extremely inverse, mainly used for transformer applications.

DT - Definite time, used for timed applications.

RI - Special applications (consult Merlin Gerin).

iii) Choice of current setting Is and Ios*:Consider assumptions made in i) and choose the nearest appropriate current

setting.

iv) Choice of low set time delay t> and to>*:Desired operating time depends on the interval to achieve grading with upstream

and downstream devices at the maximum and minimum fault levels. Between IDMT

characteristics a grading margin of 0.4s is desired. Between an IDMT characteristic

and a LV protective device a grading margin of 0.25s is considered acceptable.

v) Choice of high set current setting I>> and Io>>:I>> and Io>> are multiples of Is and Ios respectively. The high set element has the

advantage of allowing the protection upstream to reduce its operating time at high

fault levels. Grading is carried out at the instantaneous current setting and not at the

maximum fault level, therefore it can be achieved at lower currents enabling the

upstream device to operate quicker at the maximum fault level.

vi) Choice of high set time delay t>> and to>>:Depending on grading required upstream and downstream.

*Depends on characteristics of devices upstream and downstream. The selection

principles only act as a guide to set up the VIP 300, a proper protection selectivity

study should be carried out to set up device settings.

12

VIP 300 protection relayApplication

Setting examples

Typical examples will be given.

Consider 4 examples:

1 : RN2c unit protecting a typical MV/LV 1MVA transformer.

2 : CE2 unit protecting a typical MV/LV 2MVA transformer.

3 : CE6 unit protecting a radial feeder with 4 RN2c units fed from it each feeding

1HVA transformers.

4 : CE6 unit protecting the same radial feed for which a planned extension is to

make a ring feeding 8 RN2c units, each feeding 1HVA transformers.

Example schematic

13

[ ]

[ ]

VIP 300 protection relayApplication - transformers

Example 1An RN2c circuit breaker equipped with a VIP 300 feeds a 1000kVA transformer.The transformer details are as follows:Power rating = 1MVAPrimary voltage = 11kV% Impedance Zt = 5%From this the rated current of the transformer can be calculated:

Ir = Power = 1000 x 103 = 52.5A

voltage x �3 11000 x �3

The HV fault level (MVAs) will be assumed to be 250MVA. The three phase LV fault levelcan be calculated:

IFLV = 11kV x 1 A @ 11kV �3 112 + 112 x Zt MVAs MVAT 100

IFLV = 11kV x 1 A = 972A @ 11kV �3 112 + 112 x 5 250 1 100

The circuit breaker is fitted with 200/1A CTs. From the above the following will now bedetermined.

Choice of range:The setting ranges available for the minimum operating currents are:

x2 range, minimum operating current = 20A setting overcurrent 20A-100A earth fault 2A-80Ax4 range, minimum operating current = 40A setting overcurrent 40A-200A earth fault 4A-160A

By considering the minimum operating current of 20A (x2 range) then the transformer ratedcurrent is mid-point within the primary amp range. Hence there is room to consider possibleoverloads and earth fault levels.Range chosen x2 minimum operating current = 20A

Choice of curve:In this case we are dealing with a MV/LV transformer. For this application the type of curveselected for overcurrent protection is usually either a VI or EI characteristic. These curvesprovide quicker operating times at higher fault currents to allow better protection of thetransformer primary. The selection of these curves also helps in co-ordinating with the LVprotective device on the secondary side of the transformer.For earth fault protection the curve selected is usually a definite time characteristic and isnormally set quite low (typical 40% or 0.4 times the rated current).I> setting VIIo> setting DT

Choice of current setting:Overcurrent IsIf a typical overload of 30% is considered for the transformer.Is = overload x Ir = 1.3 x 52.5 = 68AChoose the nearest available setting above this in primary ampsIs setting 72A.Earth fault IosConsider a typical earth fault setting of 40% of transformer rated current, 20.8AIos setting 24A DT only setting 1

14

[( ) ]

[( ) ]

[( ) ]


Choice of low set time delay:Overcurrent t>The time setting corresponds to the actual relay operating time at 10 x Is, in this case 720A.The desired operating time for the relay is determined by the upstream and downstreamprotective devices. In this example the downstream device is on the LV network, we thereforehave to ensure adequate time is given between the two devices upto maximum LV 3ph faultlevel. It is assumed the LV device is set at 0.1s at the maximum fault level and therefore thedesired operating time for the VIP 300 is given as follows:

Desired operating = operating time + grading margin between = 0.1 + 0.25time of LV device devices

(see selection principles)If this value is used as t in the formula for the VI curve selected (see page 21)

t = 13.5 x t> desired time t = 0.35 If -1 1.5 If (fault level) = 972A

Is Is (current level) = 72At> = ?

To find t> rearrange formula

t> = If -1 x t x 1.5 Is 13.5

t> = 972 -1 x 0.35 x 1.5 72

13.5

By inserting the values into the formula t> = 0.486Select 0.5 as nearest low set time delay (0.05 and x10 multiplier). The actual operating timecan now be found by placing back into the original formula.Actual t = 0.36t> 0.05s x10Earth fault to>The earth fault element can be set as low as possible as there is no need to grade with thedevice on the LV of the transformer. It is set at 0.1 to avoid spurious operation under transientconditions such as magnetizing inrush.to> 0.1s x1

Choice of high set current setting:Overcurrent I>>The high set instantaneous element is a multiple of the setting current Is> and in this case isgraded with the LV protective device. The maximum fault current the LV protective device willsee is the 3ph LV fault level, 972A. Hence above 972A the high set can be implemented.Instantaneous = 15 x 72 = 1080 which is above 972AI>> = 15Earth fault Io>>The high set earth fault element is a multiple of the setting current Ios>. The high set elementfor the earth fault is not used in this case and should be set in the off position.Io>> off

Choice of high set time delay:Dependent on upstream and downstream protection. In this case the phaseovercurrent high set time delay t>> is set to the minimum 0.03 as downstreamgrading has been accounted for. Earth fault high set time delay to>> isdisabled as high set is in off position.t>> 0.03 to>> 0.03 (disabled as high set is in off position).

100

1000

10

1

0.1

0.011 10 100

t>

10 x Is

t>>

1.2 x Is

Overcurrent

Earth fault

100

1000

10

1

0.1

0.010.1 10 1001

to>

Io>

VIP 300

0.40.20.60.1

0.90.05

1.50.03

to>>(s)

129156

204

off3 (x Is)

0.20.150.30.1

0.40.07

0.60.05

0.40.20.60.1

0.90.05

1.50.03

t>>(s)

129156

204

off3 (x Ios)

2.11.82.41.5

2.71.2

31 (s)

0.20.150.30.1

0.40.07

0.60.05

to>(s)

curve selection

DT onlyIo> Io>>

I>>

Is

4842 5636 64

30 7224 80

20 90100(A)

Ios

2416 3212 40

8 504 60

2 7080(A)

I>

I>

trip

reset

trip

Io>

earth fault

x10



phaseovercurrent

x1

EIVISI

offRI

DT (s)

2.11.82.41.5

2.71.2

31 (x Is)

x10

x1

VAP6 test plug

EIVISI

offRI

DT

DT only

curve selection

t>

warning

not timemultiplier

see table

warning

not timemultiplier

see table

VIP 300Settings


t>

0.050.070.10.150.20.30.40.050.60.070.10.150.20.30.40.6

to>

x1x1x1x1x1x1x1

x10x1

x10x10x10x10x10x10x10

SI

0.020.020.030.050.070.100.130.170.200.240.340.500.671.011.352.02

VI

0.030.050.070.100.130.200.270.330.400.470.671.001.332.002.674.00

EI

0.060.090.120.190.250.370.500.620.740.871.241.862.483.714.957.43

Current (multiples of Ios)

Current (multiples of Is)

15

[( ) ]


VIP 300

0.40.20.60.1

0.90.05

1.50.03

to>>(s)

129156

204

off3 (x Is)

0.20.150.30.1

0.40.07

0.60.05

0.40.20.60.1

0.90.05

1.50.03

t>>(s)

129156

204

off3 (x Ios)

2.11.82.41.5

2.71.2

31 (s)

0.20.150.30.1

0.40.07

0.60.05

to>(s)

curve selection

DT onlyIo> Io>>

I>>

Is

9684 11272 128

60 14448 160

40 180200(A)

Ios

4832 6424 40

16 1008 120

4 140160(A)

t>

I>

trip

reset

trip

Io>

earth fault

x10



phaseovercurrent

x1

EIVISI

offRI

DT

curve selection

2.11.82.41.5

2.71.2

31 (x Is)

x10

x1

VAP6 test plug

EIVISI

offRI

DT

DT onlyI>

warning

not timemultiplier

see table

warning

not timemultiplier

see table

VIP 300Settings


t>

0.050.070.1

0.150.20.30.4

0.050.6

0.070.1

0.150.20.30.40.6

to>

x1x1x1x1x1x1x1

x10x1

x10x10x10x10x10x10x10

SI

0.020.020.030.050.070.100.130.170.200.240.340.500.671.011.352.02

VI

0.030.050.070.100.130.200.270.330.400.470.671.001.332.002.674.00

EI

0.060.090.120.190.250.370.500.620.740.871.241.862.483.714.957.43

Example 2

Principles as example 1

A CE2 circuit breaker feeds a typical MV/LV 11kV 2MVA transformer. Transformer impedanceand fault level as in example 1.

The rated current for a 2MVA transformer.

Ir = power = 2000 x 103= 105A

voltage x �3 11000 x �3

Choice of range:The load current exceeds the current range for the x2 setting thus the x4 setting is appropriate.

Range chosen x4 minimum operating current = 40A

Choice of curve:For this example we are dealing with a similar MV/LV application, the curve types are asselected as follows.

I> setting EIIo> setting DT

Choice of current setting:A typical overload of 30% and earth fault level of 40% are considered as inexample 1.

Is 144AIos 48A

Choice of Iow set time delay:Overcurrent t>, The LV 3 phase fault level = 1809A @ 11kV (using formula inexample 1).

t = 80 x t> If 2

-1 0.808 Is

t> = 1809 2 -1 x 0.35 x 0.808 = 0.55

144 80

The earth fault element is set as before

t> 0.6 x1to> 0.1 x1

Choice of high set current:As before

I>> 15Io>> off (disabled)

Choice of high set time delay:As before

t>> 0.03to>> 0.03 (not used as high set

current in off position).

[( ) ]

16

VIP 300 protection relayApplication - feeders

Example 3

A CE6 unit protects an 11kV radial feed feeding 4 RN2c units each subsequently feeding1000kVA transformers. The CE6 is an extensible 630A circuit breaker complete with 800/1ACTs.

Effective load current.Ir = power = 4000 x 103 = 210A voltage x �3 11000 x �3

The HV three phase fault level is assumed as 250MVA. The earth fault level is assumed as100 MVA. The corresponding fault current can be calculated from:

I3ph = MVAs = 250 x 106 = 13121A voltage x �3 11000 x �3

I1ph = MVAEF = 100 x 106 = 5248A

voltage x �3 11000 x �3

Choice of range:

min. operating current = 80A x2 range overcurrent 80A - 400A earth fault 8A - 320Amin. operating current = 160A x4 range overcurrent 160A - 800A earth fault 8A - 640A

By selecting the minimum operating current of 80A (x2 range) then the feeder rated current isin the midpoint of the range.

Range chosen x2 minimum operating current = 80A

Choice of curve:

This example deals with feeder protection, SI or VI curves are suitable as they have sloweroperating times for high fault levels. It depends on the device upstream and downstream andthe discrimination to be achieved at the HV fault level.

I> SIIo> SI

Choice of current setting:

Overcurrent protection should take into account the max load current, 210A, and possibleoverload of one or more of the transformers. Earth fault protection assumes a 40% earth fault.

Is 256AIos 96A

Choice of low set time delay setting:

Overcurrent:Consider example 1 as downstream device with t> setting equal to 0.5, a t> setting of 1.5 forthe upstream device gives adequate margin over the entire characteristic t> 0.15 x 10.

17

[( ) ]

[( ) ]

1.2 x Is

100

1000

10

1

0.1

0.011 10 100

10 x Is

t>


For the earth fault element the downstream device operates at 0.1s, therefore the requiredoperating time for the upstream relay is 0.5s at the maximum phase - earth fault level.

t = 0.14 x to> desired time t = 0.5 If 0.02

-1 2.97 If (fault level) = 5248A Is Is (current setting) = 96A

to> = ?To find to> rearrange formula

to> = If 0.02 -1 x t x 2.97 Is 0.14

to> = 5248 0.02 -1 x 0.5 x 2.97 96 0.14

By inserting the values into the formula to> = 0.88 select 1.0 as nearest setting.The actual operating time can now be found by placing back into the formula above.Desired operating time t = 0.57to> 0.1s x10

Choice of high set:

Disabled for this application.

I>> offIo>> off

Choice of high set time delay:

Disabled as high set is in off position set at minimum t>> & to>> = 0.03

VIP 300

0.40.20.60.1

0.90.05

1.50.03

to>>(s)

129156

204

off3 (x Is)

0.20.150.30.1

0.40.07

0.60.05

0.40.20.60.1

0.90.05

1.50.03

t>>(s)

129156

204

off3 (x Ios)

2.11.82.41.5

2.71.2

31 (s)

0.20.150.30.1

0.40.07

0.60.05

to>(s)

curve selection

DT onlyIo> Io>>

I>>

Is

192168 224144 256120 288

96 32080 360400

(A)

Ios

9664 12848 160

32 20016 240

8 280320(A)

t>

I>

trip

reset

trip

Io>

earth fault

x10



phaseovercurrent

x1

EIVISI

offRI

DT (s)

2.11.82.41.5

2.71.2

31 (x Is)

x10

x1

VAP6 test plug

EIVISI

offRI

DT

DT onlyI>

curve selection

warning

not timemultiplier

see table

warning

not timemultiplier

see table

VIP 300Settings


t>0.050.070.10.150.20.30.40.050.60.070.10.150.20.30.40.6

to>x1x1x1x1x1x1x1

x10x1

x10x10x10x10x10x10x10

SI

0.020.020.030.050.070.100.130.170.200.240.340.500.671.011.352.02

VI

0.030.050.070.100.130.200.270.330.400.470.671.001.332.002.674.00

EI

0.060.090.120.190.250.370.500.620.740.871.241.862.483.714.957.43

Overcurrent

Earth fault

1.2 x Is

100

1000

10

1

0.1

0.011 10 100

10 x Is

t>

Current (multiples of Ios)

Current (multiples of Is)

[( ) ]

18


Example 4An extension is planned for the system to feed another 4 RN2c units in a ring as shown in thediagram, the CE6 ring feeders would have to be capable of feeding the load on the ring.Example carried out as example 3.

Choice of range

Load rating exceeds range x2 maximum, 420A.

Rating chosen x4 minimum operating current = 160A

Choice of curve

As example 3.

Choice of current setting

Is 512A

Iso 192A

Choice of low set time delay

calculated similarly to example 3

t> 0.15 x10to> 0.07 x10

Choice of high set

As example 3.

Choice of high set time delay

As example 3.

VIP 300

0.40.20.60.1

0.90.05

1.50.03

to>>(s)

129156

204

off3 (x Is)

0.20.150.30.1

0.40.07

0.60.05

0.40.20.60.1

0.90.05

1.50.03

t>>(s)

129156

204

off3 (x Ios)

2.11.82.41.5

2.71.2

31 (s)

0.20.150.30.1

0.40.07

0.60.05

to>(s)

curve selection

DT onlyIo> Io>>

I>>

Is

384336 448288 512240 576192 640

160 720800(A)

Ios

192128 25696 320

64 40032 480

16 560640(A)

t>

I>

trip

reset

trip

Io>

earth fault

x10



phaseovercurrent

x1

EIVISI

offRI

DT

curve selection(s)

2.11.82.41.5

2.71.2

31 (x Is)

x10

x1

VAP6 test plug

EIVISI

offRI

DT

DT onlyI>

warning

not timemultiplier

see table

warning

not timemultiplier

see table

VIP 300Settings


t>

0.050.070.1

0.150.20.30.4

0.050.6

0.070.1

0.150.20.30.40.6

to>

x1x1x1x1x1x1x1

x10x1

x10x10x10x10x10x10x10

SI

0.020.020.030.050.070.100.130.170.200.240.340.500.671.011.352.02

VI

0.030.050.070.100.130.200.270.330.400.470.671.001.332.002.674.00

EI

0.060.090.120.190.250.370.500.620.740.871.241.862.483.714.957.43

19

Phase overcurrent AccuracyI> Low set - three phase �5% or 0/+2A

- single phase �10% or 0/+4At> Low set time delay

- definite time � 2% or � 20ms *(see note)- IDMT class 5 according to IEC 255-3 *(see note)

I>> High set �5%

t>> High set time delay �2% or �20ms *(see note)% of pick-up 95%storage time 20ms

*Operating times refer to when the relay is powered up, the tripping times indicated do not include the Mitop response time.When the relay is switched onto a fault the operating time will be extended by:+30ms at 1.5ls+20ms from 2ls to 10ls+10ms above 10ls

Earth fault AccuracyIo> Low set - three phase �5% or 0/+2A

- single phase �10% or 0/+4A

to> Low set time delay - Definite time �2% or �20ms *(see note)- IDMT class 5 according to IEC 255-3 *(see note)

Io>> High set �5%

to>> High set time delay �2% or �20ms *(see note)% of pick up 95%storage time 20ms

*Operating times refer to when the relay is powered up, the tripping times indicated do not include the Mitop response time.When the relay is switched onto a fault the operating time will be extended by:+30ms at 1.5ls+20ms from 2ls to 10ls+10ms above 10ls

General characteristics ValueOperating frequency 50Hz +10%, 60Hz +10%Operating temperature -25�C to +70�CStorage temperature -40�C to +85�CContinuous rating 240A With Ringmaster 200/1A CTContinuous rating 960A With Ringmaster 800/1A CT

Environment & Standard Severityelectromagnetic capabilityVibration IEC 255-21-1 Class 2Enclosure protection index EN 60529 IP54(cover closed) IP20(cover open)Sensor input isolation IEC 255-5 2kV rms, 50 Hz, 1mn1.2/50 �s impuse voltage IEC 255-5 5kV1MHz dampened oscillating wave IEC 255-22-1 2.5kV cm

1kV dmRapid transient bursts IEC 255-22-4 4kV cm and dm, 5kHz burst1.2/50 (8-20�s) hybrid wave IEC 1000-4-5 2kV 42 ohmsElectrostatic discharge IEC 255-22-2 8kV in air 6kV on contactRadio frequency on I/Os EN 50082-2 10V,0.15 to 80 MHzHF electromagnetic field IEC 255-22-3 30V/m not modulated, 27 to 1000 MHz

EN 50082-2 10V/m mod. ampl., 80 to 1000MHzEN 50082-3 11V/m mod. impuls., 900MHz

50/60 Hz magnetic field EN 50082-2 30A/m steadyIEC 1000-4-8 300A/m, 1s

Radiant field emitted EN 50081 30 dB�V/m at 10m, 30 to 230MHz37 dB�V/m at 10m, 230 to 1000MHz

VIP 300 protection relayTechnical characteristics

20

■ The graphs in this section represent the 8 time delay settings for t> and to>available on the x1 and x10 ranges.

■ The low set pick-up settings I> and Io> are fixed at 1.2xIs and 1.2xIsorespectively for the IDMT characteristics.>

■ The numbers given on the right of the curves represent the position of the timedelay selector switch t> or to>. They correspond to the actual operating timeat a current of 10 times the pick-up.

■ If the multiplying factor x1/x10 is in the x10 position, multiply the time delayselector settings by 10 (see x10 graph).

■ The phase overcurrent and earth fault protection curves are the same.

IDMT tripping curves

VIP 300 protection relayIDMT tripping curves

Standard inverse

t = 0.14 x t> I 0.02

-1 2.97

Is ( )

SI current/time curves with selectorswitch on the x1 setting

SI current/time curves with selectorswitch on the x10 setting

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21


RI curve(Specific application - please consult Merlin Gerin)

VI current/time curves with selectorswitch on the x1 setting

VI current/time curves with selectorswitch on the x10 setting

Very inverse

t = 13.5 x t> I

-1 1.5

Is( )

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22


Extremely inverse

t = 80 x t> I 2

-1 0.808

Is( )

EI current/time curves with selectorswitch on the x1 setting

EI current/time curves with selectorswitch on the x10 setting

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23

■ The graphs below represent the 8 low set pick-up settingsfor I> and Io> and the 8 time delay settings for t> and to> available on the x1and x10 ranges.

■ The low set pick up settings I> and Io> are variable between 1 and 3 times Isand Ios respectively.

■ The numbers given at the top of the curves represent the variable setting ofthe low set selector switch I> and Io>. The numbers given on the right of thecurves represent the position of the time delay sector switch t> or to>.

■ If the multiplying factor x1/x10 is in the x10 position, multiply the time delayselector settings by 10 (see x10 graph).

■ The phase overcurrent and earth fault protection curves are the same.

DT tripping curves

VIP 300 protection relayDT tripping curves

DT current/time curves with selectorswitch on the x1 setting

DT current/time curves with selectorswitch on the x10 setting

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JAN 2004MGMV 5477Merlin Gerin Medium Voltage 123 Jack Lane, Hunslet, Leeds LS10 1BS UK

Tel: +44 (0)113 290 3500 Fax: +44 (0)113 290 3710 www.schneider.co.uk

vip300 protection relay for ringmaster mgmv5477

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