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Types IJS51A and IJS52A - Synchronism-Check Relays
Type IJS52D - Synchronism Check Relay
Type IJS52E - Synchronism Check Relay
IJS53A4/A5/A6 Synchronism Check Relay
Type IJS52F - Synchronism Check Relay
Type IJS - Model IJS52G(-)A - Synchronism Check Relay
IJS99AA Synchronism Check Relay