ABB REF 610 Technical Reference Manual

Also see for RELION REF610: Technical reference manual Technical reference manual Operator's manual Product guide

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ABB REF 610 Technical Reference Manual Manual pdf 70 page image

Table 5.1.4.11.-6 Auto-reclose functionFeature ValueNumber of shots 0...3CB Closing time 0.1...10 sStart delay of stage I> 0...300 sStart delay of stage I0 > 0...300 sReset time 3...300 sCutout time 0.1...300 sDead time of shot 1 0.1...300 sDead time of shot 2 0.1...300 sDead time of shot 3 0.1...300 sOperate time accuracy ±2% of the set time and ±25 msTable 5.1.4.11.-7 CBFPFeature ValueSet operate time 0.10...60.0 sPhase-current threshold for externaltriggering of the CBFP* pick-up/drop-off 0.08/0.04 x I n5.1.5. Trip-circuit supervisionThe trip-circuit supervision (TCS) detects open circuits, both when the circuitbreaker is open and closed, and trip-circuit supply failure.The trip-circuit supervision is based on a constant current injection principle: byapplying an external voltage, a constant current is forced to flow through theexternal trip circuit. If the resistance of the trip circuit exceeds a certain limit, due tooxidation or a bad contact, for instance, the trip-circuit supervision is activated and awarning appears on the LCD together with a fault code. The warning signal from thetrip-circuit supervision can also be routed to SO2 by setting switch SGF1/8 to 1.Under normal operating conditions, the applied external voltage is divided betweenthe relay’s internal circuit and the external trip circuit so that at least 20 V remainsover the relay’s internal circuit. If the external trip circuit’s resistance is too high orthe internal circuit’s too low, due to welded relay contacts, for instance, the voltageover the relay’s internal circuit falls below 20 V (15...20 V), which activates the trip-circuit supervision.The operation condition is:U R R Ic xt s c- 20 V ac/dcR e int+ +( ) × ≥ (8)U c = operating voltage over the supervised trip circuitIc = current flowing through the trip circuit, ~1.5 mAR ext = external shunt resistorR int = internal shunt resistor, 1 kΩR s = trip coil resistance70REF 610REF 610 Feeder Protection RelayTechnical Reference Manual1MRS755310