ABB REU 610 Technical Reference Manual
Also see for REU 610: Installation manualTechnical reference manualOperator's manualTechnical reference manualOperator's manual
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Contents
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9 $ 6$ $$A0403292Fig. 5.1.5.-1 Connecting the trip-circuit supervision using two external contactsand the external resistor in the trip circuit5.1.6. Trip lockout functionThe trip lockout function is used to prevent accidental closing of the circuitbreaker after a trip. The trip lockout function must be locally reset with aseparate reset command before the circuit breaker can be closed again. Thisfunction is useful when the trip output contact of the relay is latched or theopen circuit of the circuit breaker remains activated.The trip lockout function is selected in SGF1. When selected, PO3 isdedicated to this function. As long as no trip occurs, PO3 is closed.Every signal which has been routed to PO3 via the output signal matrixactivates the trip lockout function and opens the contacts of PO3. When thecontacts have opened, they are locked into the open state.The trip lockout function can also be activated externally, via a digital input.The trip lockout function can be reset via a digital input, the HMI or SPAparameter V103, but not before the signal which activated the function hasbeen reset.In case of loss of auxiliary power when the trip lockout function is in use, thecontacts of PO3 return to the same state as before the loss, provided that thebattery has been inserted and is charged. If no battery has been inserted, thetrip lockout function is activated and the contacts of PO3 remain open whenthe auxiliary power is switched on again.50REU 610 Voltage RelayTechnical Reference Manual - ANSI Version1MRS755972 |
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