PSL 691U
Line protection measurement and control device
Three section overcurrent protection ( Can be started by complex voltage , Strappable direction ) / three
Segmental zero sequence overcurrent protection ( Strappable direction ) / Overload protection / coincidence
gate / Check synchronous manual closing / Closing acceleration protection / Low cycle load shedding / low
Ballasting / Small current grounding line selection / measure
35kV Voltage level and below
Line of
PSL 691US
Line protection measurement and control device
Three section compound voltage overcurrent protection / Zero sequence overcurrent protection / Overnegative
Load protection / Rear acceleration protection / 4-20Ma output / measure
Auxiliary power incoming line, buscouple switch
PST 691U
Transformer differential protection device
differential protection / Differential quick break protection / Differential current out of limit alarm / TA break
Line discrimination
PST 691UF
Transformer non electric quantity protection device
Transformer non electric quantity protection / Separate operating circuit
PST 692U
Transformer backup protection and monitoring device
Complex voltage lockout ( direction ) Overcurrent protection / Zero sequence current protection / between
Gap zero sequence current protection / Zero sequence voltage protection / Overload protection /
Start ventilation / Lock on load voltage regulation / measure
110kV And below voltage, etc
Class capacity is 6300kVA and
Transformer above
PST 693U
Transformer protection and monitoring device
Three section compound voltage overcurrent protection / Inverse time overcurrent protection / two
Section definite time negative sequence overcurrent protection / Fixed time zero sequence overcurrent at HV side
protect / Fixed time zero sequence overcurrent protection at low-voltage side / Low voltage side reverse time
Zero limiting sequence overcurrent protection / Overload protection / Overvoltage protection / low
Voltage protection / Non electric quantity protection / FC atresia / 4-20mA output /
measure
2000kVA The following service
Transformer, used transformer, grounding transformer
PSC 691U
Capacitor protection, measurement and control device
Current quick break protection / Overcurrent protection / Overvoltage protection / Low voltage
protect / Zero sequence overcurrent protection / Unbalanced current protection / out-off-balance
Voltage protection / Differential voltage protection / Differential current protection / measure
Shunt capacitor bank
PSR 691U
reactor ( Cable ) Differential protection device
differential protection / Differential quick break protection / Three section compound voltage overcurrent
protect / Zero sequence overcurrent protection / Overload protection / measure
Series reactor, cable line
PSP 691U
Automatic switching device of standby power supply
Bus coupler standby automatic switching / Incoming line standby automatic switching / Transformer standby automatic switching / Plant use
Automatic switching of power supply
Automatic switching of standby power supply
PSV 691U
PT Protection, measurement and control device
Two section low-voltage protection / Bus insulation detection / measure 35kV And below PT cabinet
PSV 692U
PT Paralleling device
PT Juxtaposition
Single bus sectioning
PSV 693U
PT Paralleling device
PT Juxtaposition / Two section low-voltage protection
Single bus sectioning
PSM 691U
Motor differential comprehensive protection device
differential protection Comprehensive protection measure
2000kW And above asynchronous power
motivation
