srxq44 q118 buyers guide

8/10/2019 SRXQ44 Q118 Buyers Guide

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ABB Distribution Automation Products

Drop-out time-lag relays for rail vehicles

Type SRX-Q44, SRX-Q121SRX-Q118/Q119/Q120

SRX-Q122/PR1

StationAutomation

& Protection


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Features High repetition accuracy

State indication by dual color LED

Internally adjustable time delay

Robust design for rolling stock

Plug-in base mounting

6 contacts with double interruption

Application

The SRX-Q... relays are intended for use inprotection, sequence and signaling systems oflocomotives. The relay is suitable for severeelectrical, mechanical and environmental require-ments of railways.

Design and principleThe time lag relay type SRX-Q... has the PC8 relay ofproven design as its basic building block and outputelement. The relay is dc voltage operated and isfactory set for fixed time delay. The time delay sett-ing can be changed by adjusting the internalpotentiometer R13on the PCB assembly. For true

operation, voltage shall continuously be connectedto terminals 16 and b (fig. 1). The relay picks-upwhen 110 V dc is extended to terminal a by means ofa closed external initiating contact. When theinitiating contact is opened, measurement of timestarts. The relay operates (drops-out) aftercompletion of the set time delay, provided thatvoltage is continuously applied to terminals 16andb.Whenever the voltage supply is interrupted, the relayresets. At the time of applying voltage, if initiating

contact is open, output element remains in resetcondition. The relay has one dual color LED, whichglows green or red for indication of pick-up and drop-out conditions respectively.

The auxiliary relay type PC8 is an instantaneous,plunger-type relay with heavy duty doubleinterruption contacts. Six output contacts are madeavailable in SRX-Q... relay.

The low pick-up value of the PC8 relay (approx. 50%

of rated) along with movement of 3 mm and thestrong restoring springs ensure that the holding forceon the plunger is sufficiently large, both, in picked-upand dropped-off conditions. The strong holding forcein-turn ensures operational reliability in conditions ofvibration and shock expected in railway vehicles.The contacts are made of silver-palladium alloy andare gold plated. The special contact metallurgyassures contact life (electrical & mechanicaldurability) in severe environmental conditionsexpected in railway vehicles. The contacts have lowresistance and unlike pure silver contacts, they canwithstand noxious effects of tropical conditions and

are free from sulfur attacks. This feature makes therelays suitable for higher switching rates.

A transparent protective hood of polycarbonatematerial, that does not burn easily, provides goodprotection against dust to PC8 element. The plug-inmounting method is ideal for installation andservicing. Guide pins prevent the relay from beingplugged in the wrong way round. The marking of theterminals on the base agrees with that of the relaycontacts.

Technical dataEnergizing quantities, rated values and limits Rated voltage U : 110 V DCN Operative voltage range : 70 - 125 V DC

Pick-up voltage : < 70 V DC

Drop-out voltage : >10% of rated voltage

Time delay

SRX-Q44 : 0,6 sec

SRX-Q118/Q119/Q120 : 5,0 sec

SRX-Q121 : 45 sec

SRX-Q122/PR1 : 60 secoAccuracy of operate time at rated voltage and 25 C : +/- 2% of set value

Change in operate time at voltage change within the

Change in operate time at temperature change within

Power consumption at rated voltage 110VDC : Before pick-up After pick-up

1W 7W

Mechanical durability; :

Tested according to IEC 77, IEC 255 200 Draw-out/Plug-in operations

Weight : 1.4 Kg

o oPermitted ambient temperature range : 0 C to +55 C

UN: Less than 25 msec or +/- 1,0 % of set value,

operative range whichever is higher

: Less than 10 msec or +/- 1,0 % of set value,o

the permitted range whichever is higher, for each 10 Cdeviation

1 Million switching operations &


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Technical data (Contd)

Electrical tests

Measurement of resistance; Tested acc. to IEC 77 : +/- 10% of specified

Temperature-rise; Tested acc. to IEC 77,IEC 255 : Coil (class B), Contact, heat dissipating

components

Insulation resistance; Tested acc. to IEC 255-5 : >100 M Ohm at 500 V dc

Dielectr ic; Tested acc. to IEC 77, 571, 255-5 : 2,0 kV 50 Hz, 1 min

Impulse; Tested acc. to IEC 571 & IEC 255-5 : 5 kV, 1,2/50s, 0,5J

Supply ripple; Tested acc. to IEC 255-11 :


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152

85

Ls

188*

125

Dw

15

13

11

9

b

10

12

14

168

6

4

1

2

a

3

5

7

Db Aa

85

110

30

55 8

0

Eo1

6Dimensions

Ls : Operation signalDb : Mounting holeAa : Terminals

* : Space for removing hood

E01 : Cut-out for rear wiring.

Legend

Dw : Field weakening resistor

2) : Fixing screw

Fig.2- Relay mounted on Plug-in base

13

11

9

7

5

3

4

6

8

10

b

a+

INPUT

110V DC

-

1616

a

b

a

b

3 1

4

2

1

TIMERCIRCUIT

FWR

PC8RELAY

INITIATINGCONTACT

Base Plug-in part

10

8

6

4

3

5

7

9

11

13

12

14

12

14

2

Fig.1- Schematic drawing for SRX-Q... relay

Switch Posit ion Time range

J11 - 2 4.0 - 72.0 sec.

2 - 3 0.5 - 9.0 sec.

Selection of time delay range

Connection diagram and contact configuration

T

T = LED Indicator

Pick-up indication - Green glow

Drop-out indication - Red glow

2)

2)

2)

2)


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Panorama is the standard for a comprehensive range ofintegrated solutions for efficient and reliablemanagement of power networks. Using innovativeinformation technology, Panorama delivers total controlof the power process, from generation to consumption.The Panorama standard covers six application areas,each offering specific solutions.

1MDB08215

-YN

04-2005

StationAutomation

& Protection

NetworkManagement

BusinessManagement

Meter & LoadManagement

Consulting& Services

Communications

ABB LimitedDistribution Automation ProductsManeja, Vadodara 390 013, India.Tel. : 0265-2604386, 2604384, 2604387Fax : 0265-2638922E-mail : [email protected]

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