Page 614 - Motor_protection_and_control_Manual_motor_starters_ contactors

Surge suppressors for contactor coils

Technical data
Varistor + RC RC-EH800/110 RC-EH800/600
Rated control circuit voltage Uc 48...110 V AC 220...600 V AC
24...125 V DC –
Residual overvoltage (clipping voltage) 205 V AC 1100 V AC
205 V DC –
Opening time growth factor 1.1 ... 1.15
Operating temperature -20 ... +70 °C
Connection to the coil terminals (parallel mounting) Flexible, accessible leads, equipped with forked lugs
Fixing Glued to the top part of the contactor base
Advantages - High energy absorption: good damping
- Unpolarized system
- The RC system damps the voltage front under the Uvdr (1) threshold.
(1) Uvdr = Varistor operating (voltage dependant resistor), tolerance ±10 %.

5
Wiring diagrams
A1

U
A2 E0736D
Varistor + RC

Main dimensions mm

30
175
57.5
15 E0845D
RC-EH

1SFC101224C0201

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