Nanzi PSL691U microcomputer protection and monitoring device

Nanzi PSL691U microcomputer protection and monitoring device

PSL 691U
Line protection measurement and control device
Three section overcurrent protection (can be started by composite voltage, and can be with direction)/three section zero sequence overcurrent protection (can be with direction)/overload protection/reclosing/synchronous manual closing/closing acceleration protection/low cycle load shedding/low-voltage load shedding/small current grounding line selection/measuring lines with voltage levels of 35kV and below.
PSL 691US
Line protection measurement and control device
Three section composite voltage overcurrent protection/zero sequence overcurrent protection/overload protection/post acceleration protection/4-20Ma output/measuring 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 disconnection 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
Composite voltage lockout (direction) overcurrent protection/zero sequence current protection/clearance zero sequence current protection/zero sequence voltage protection/overload protection/startup ventilation/lockout on load voltage regulation/measurement of transformers with voltage class of 110kV and below and capacity of 6300kVA and above.
PST 693U
Transformer protection and monitoring device
Three section composite voltage overcurrent protection/inverse time overcurrent protection/two section definite time negative sequence overcurrent protection/HV side definite time zero sequence overcurrent protection/LV side definite time zero sequence overcurrent protection/LV side inverse time zero sequence overcurrent protection/overload protection/overvoltage protection/low-voltage protection/non electric quantity protection/FC blocking/4-20mA output/measurement. Auxiliary transformer, service transformer and grounding transformer below 2000kVA.
PSC 691U
Capacitor protection, measurement and control device
Current quick break protection/overcurrent protection/overvoltage protection/low-voltage protection/zero sequence overcurrent protection/unbalanced current protection/unbalanced voltage protection/differential voltage protection/differential current protection/measuring shunt capacitor bank.
PSR 691U
Reactor (cable) differential protection device
Differential protection/differential quick break protection/three-stage composite voltage overcurrent protection/zero sequence overcurrent protection/overload protection/measuring series reactor, cable line.
PSP 691U
Automatic switching device of standby power supply
Buscouple backup automatic switch/incoming line backup automatic switch/transformer backup automatic switch/auxiliary power automatic switch Standby power automatic switch.
PSV 691U
PT protection, measurement and control device, two-stage low-voltage protection/bus insulation detection/measurement, 35kV and below PT cabinet.
PSV 692U
PT paralleling device PT paralleling single bus section.
PSV 693U
PT paralleling device PT paralleling/two section low-voltage protection single bus section.
PSM 691U
Motor differential integrated protection device Differential protection integrated protection measures 2000kW and above asynchronous motor.

Nanzi PSL691U microcomputer protection and monitoring device

2 Technical performance and index
2.1 Rated electrical parameters
1. Power supply
DC rated voltage: 220V or 110V. (For DC 220V and AC 220V, the device power module can be adaptive).
Allowable deviation: - 20% ～ ＋ 15%.
Ripple coefficient: no more than 5%.
2. Rated current and voltage.
AC current: high or 1A.
AC voltage: 100V or 100/3V.
2.2 Main technical indicators
3. Good working range
Current: 0.04In ～ 20In (In=high or In=1A).
Voltage: 1V~140V.
Frequency: 45Hz~55Hz.
4. Measurement accuracy
Current: Class 0.2 (including harmonics).
Voltage, active power, reactive power and power factor: level 0.5 (including harmonics).
Frequency: ≤± 0.01Hz.
4-20mA output: 0.5 level.
5. Fixed value error
Setting value error: no more than ± 3%.
Action time error: definite time protection, not exceeding (± 1% setting value+40) ms; Inverse time protection, no more than ± 5% of the setting value or ± 40ms.
6. Telesignaling resolution
Less than 2ms.
7. GPS time synchronization
Minute pulse or second pulse: the interface provided by the GPS device is required to be an empty optocoupler, and the withstand voltage is greater than 50V; IRIG-B: DC time code, RS485 interface.