Page 251 - Contactors_Catalogue

ABB MOTOR CONTROL AND PROTECTION FOR ROLLING STOCK APPLICATIONS 4/51

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AF45..RT … AF75..RT 4-pole contactors
Technical data

General technical data
Contactor types AF45..RT AF75..RT
Rated insulation voltage Ui
acc. to IEC 60947-4-1 1000 V
acc. to UL / CSA 600 V
Rated impulse withstand voltage Uimp. 8 kV
Electromagnetic compatibility Devices complying with IEC 60947-1 / EN 60947-1 - Environment A
Ambient air temperature close to contactor
Operation -40...+70 °C
Storage -60...+80 °C
Climatic withstand acc. to IEC 60068-2-30 and 60068-2-11 - UTE C 63-100 specification II
Maximum operating altitude (without derating) 3000 m
Mechanical durability
Number of operating cycles 10 millions operating cycles
Max. switching frequency 300 cycles/h
Shock withstand 04
acc. to IEC 61373 Category 1, class B

Remark for 4-pole contactors fitted with 2 N.O. + 2 N.C. main poles

1 R3 R5 7
These contactors are suitable for controlling 2 separate circuits, i.e. 2 loads with 2 separate supplies, or 1 cir-
cuit comprising 2 separate loads with a single supply (see diagrams below). When the contactor operates
there is no mechanical overlapping between the N.O. poles and the N.C. poles: BREAK before MAKE.
2 R4 R6 8

!
These contactors are not suitable for a reversing starter or for controlling a single load from 2 separate supplies.

Block diagrams
– Single supply and 2 separate loads – 2 separate supplies and 2 separate loads

Main
Supply supply
Back-up
supply
A1 1 R3 R5 7 A1 1 R3 R5 7
A2 2 R4 R6 8 A2 2 R4 R6 8
Load Load
Load Load

1SBC100085S0201 - Rev. A