COMBITEST RTXP 8-18-24 – Test switch

A test switch may be used where testing relays or instruments would otherwise require manual disconnection and shorting of the instrument transformer’s secondary or control wiring. It may also well be used in the testing of complete relay systems, even when each individual relay has its own test switch. A test switch can also be used for other testing needs not directly associated with relays, such as for switchboards or voltmeters.

• Test switch RTXP 8: RTXP 8 contains eight contacts and occupies one seat in the COMBIFLEX system with dimensions 2U and 6C.
• Test switch RTXP 18: RTXP 18 contains a maximum of 18 contact units and occupies the space of two seats in the COMBIFLEX system with dimension of 4U and 6C.
• Test switch RTXP 24: RTXP 24 consists of two housings, each housing with a maximum of 12 contact units. This test switch occupies the front space of 3U 12 C.
• Fail-safe sequence disconnecting trip circuits when the test-plug handle is inserted.
• Latching feature so that when the test-plug handle is withdrawn the relay stabilises in its reset position before the trip circuits are restored.
• Complete isolation of secondary instrument transformer circuits.
• Trip-block plug, which isolates a trip circuit without interrupting other circuits, allows the trip output to be monitored, and also provides visual indication of an isolated trip circuit.
• Block-plug handle, which disconnects all circuits, routed through the test switch.
• Ammeter test-plug with local automatic shorting device in case of inadvertent opening of a CT circuit.
• Auxiliary station power supply made available for operating test equipment. 
• Extension bases which facilitate measurement and adjustment of plug-in module circuits.