ABB COMBITEST overview
ABB COMBITEST RTXP 18 Test System Test system meets CAT III insulation and safety requirements of relevant IEC standards Fail-safe sequential disconnection of trip circuits, short circuiting of secondary CT circuits and disconnection of secondary VT circuits, before access is made to the device to b...
What is ABB COMBITEST?
ABB COMBITEST RTXP 18 Test System Test system meets CAT III insulation and safety requirements of relevant IEC standards Fail-safe sequential disconnection of trip circuits, short circuiting of secondary CT circuits and disconnection of secondary VT circuits, before access is made to the device to b...
Product details
Manufactured byABB
Product groupTest System
DescriptionABB COMBITEST RTXP 18 Test System
Key FeaturesTest system meets CAT III insulation and safety requirements of relevant IEC standards Fail-safe sequential disconnection of trip circuits, short circuiting of secondary CT circuits and disconnection of secondary VT circuits, before access is made to the device to be tested through the test handle CAT III banana test cable access points Latching feature when the test-plug handle is withdrawn allowing the relay to stabilize with actual CT currents and VT voltages before the trip circuits are restored. This prevents inadvertent tripping Complete isolation of secondary instrument transformer circuits Trip-block plug which isolates a trip circuit without interrupting other circuits, allowing the trip output to be monitored, and also provides visual indication of an isolated trip circuit Block-plug handle which disconnects all circuits including the DC power supply to the device routed through the test switch Ammeter test-plug with built-in automatic short-circuiting device in case of inadvertent opening of the CT circuit through the connected ammeter Auxiliary station power supply made available for test equipment Extension bases which facilitate measurement and adjustment of plug-in module circuits Available in a number of different versions for combinations of CT and VT circuits, control and tripping circuits etc. An auxiliary signaling contact on test switch RTXP 24 is used for handling of Test Mode in IEDs when the test handle RTXH 24 is inserted. This is useful to comply with the requirements stated in IEC61850 for test mode handling.
Typical ApplicationsThe COMBITEST system for secondary injection testing of protection relays and protection IEDs is built up around the test switches RTXP 8, RTXP 18 or RTXP 24. The test switches can also be used for other testing needs not directly associated with relays, such as for switchboards or voltmeters.The test switch is especially suited for use where testing requires disconnection of the instrument transformer’s secondary or control wiring. It may also be used to advantage in the testing of other complete relay systems, even when each individual relay has its own test switch.When the test-plug handle is inserted into the test switch, preparations for testing are automatically carried out in the proper sequence, i.e. opening of tripping circuits, short-circuiting and then disconnection of CTs, opening of voltage (VT) circuits and making relay terminals available for secondary injection.The test-plug handle may be connected to any type of test equipment or instrument. When a number of protection relays of the same type are tested, the test-plug handle need to be moved only from the test switch of one relay to the test switch of the other, without altering previously made connections. If different types of relays are to be tested, it is a simple matter to change the connections on the test-plug handle and the relay testing set
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