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ABB MOTOR PROTECTION AND CONTROL 3/349

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Surge suppressors for contactor coils

Technical data
03
Varistor RV5/50 RV5/133 RV5/250 RV5/440
Rated control circuit voltage Uc 24...50 V AC 50...133 V AC 110...250 V AC 250...440 V AC
24...50 V DC 50...133 V DC 110...250 V DC 250...440 V DC
Residual overvoltage (clipping voltage) 132 V AC 270 V AC 480 V AC 825 V AC
132 V DC 270 V DC 480 V DC 825 V DC
Opening time growth factor 1.1...1.5
Operating temperature -20...+70 °C
Connection to the coil terminals (parallel mounting) Clip-on for both fixing and connection.
Fixing Clipped onto the top part of the contactor base without change in contactor overall dimensions.
Advantages High energy absorption: good damping - Unpolarized system.
Drawback Clipping as from Uvdr*, thus voltage front up to this point.
*Uvdr = Varistor operating voltage (voltage dependent resistor), tolerance ± 10 %.
RC5-1/50 RC5-1/133 RC5-1/250 RC5-1/440
RC type RC5-2/50 RC5-2/133 RC5-2/250 RC5-2/440
Rated control circuit voltage Uc 24...50 V AC 50...133 V AC 110...250 V AC 250...440 V AC
Residual overvoltage (clipping voltage) 2 to 3 x Uc max.
Opening time growth factor 1.2...1.3
Operating temperature -20...+70 °C
Connection to the coil terminals (parallel mounting) Clip-on for both fixing and connection.
Fixing Clipped onto the top part of the contactor base without change in contactor overall dimensions.
Advantages Very fast clipping - Attenuation of steep fronts and thus of high frequencies. No operating delays.
Transil diode RT5/32 RT5/65 RT5/90 RT5/150 RT5/264
Rated control circuit voltage Uc 12...32 V DC 25...65 V DC 50...90 V DC 77...150 V DC 150...264 V DC
Residual overvoltage (clipping voltage) 50 V DC 100 V DC 150 V DC 210 V DC 390 V DC
Opening time growth factor 1.5...3
Operating temperature -20...+70 °C
Connection to the coil terminals (parallel mounting) Clip-on for both fixing and connection.
Fixing Clipped onto the top part of the contactor base without change in contactor overall dimensions.
Advantages Good energy absorption - Unpolarized system - Simple, reliable system.
Drawback A certain delay on drop out which does not however reduce contactor breaking capacity.

Wiring diagrams
A1 A1 A1

A2 E0735D A2 E0734D A2 E0733D
Varistor RC type Transil diode

Dimensions

The add-on block does not increase the
contactor overall dimensions E0844D
RV5, RC5, RT5