PSL691U microcomputer line protection and monitoring device of Guodian Nanzi
1 Technical characteristics
? The internationally popular high-speed processor is adopted, with the main frequency of 200 MHz, rich built-in resources, simple peripheral circuit design, and guaranteed product quality
And its stability. Sufficient hardware resources, 4M byte Flash Memory memory, 8M byte SDRAM.
? With USB interface, the device program can be directly upgraded through the U disk, and the action information and fault recording data can be directly stored in the U disk,
It is convenient for fault analysis.
? Measure three-phase current and zero sequence current (Ia, Ib, Ic, Io), three-phase or line voltage (Uan, Ubn, Ucn, Uab, Ubc, Uca),
Active power P, reactive power Q, power factor cos φ， Frequency f, active power kWh, reactive power kVarh.
? The measured values of current, voltage, power and electrical degree can not only reflect the fundamental wave, but also correctly reflect the 2nd~13th harmonics, so that the measured results are consistent with the
Special measuring meters are consistent.
? It has a 4~20mA DC analog output (can be customized as current, voltage or power), replacing AC acquisition Transmitter 。
? For more 14 channels, users can define the input quantity interface of the name.
? The outlet mode of the protection element can be set through the tripping matrix to facilitate the user to select the relay 。 All relay outlets
The contact can be selected as tripping contact (automatic return) or signal contact (return after reset).
? With operation loop, adaptive 0. high~high switch Trip closing current.
? GPS time synchronization can adopt hard contact sub pulse or second pulse mode, and it also supports IRIG-B time synchronization mode (RS485 interface).
? Differential protection has criteria to prevent misoperation of differential protection due to TA saturation when equipment starts or external faults occur.
? Effective and reliable PT disconnection criterion, effective prevention electric machinery Low voltage element misoperation
2 Technical performance and index
2.1 Rated electrical parameters
? 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%.
? Rated current and voltage
AC current: high or 1A;
AC voltage: 100V or 100/3V.
2.2 Main technical indicators
? Good working range
Current: 0.04In ～ 20In (In=high or In=1A);
Voltage: 1V~140V;
Frequency: 45Hz~55Hz.
? measurement accuracy
Current: 0.2 level (including harmonics);
Voltage, active power, reactive power and power factor: 0.5 level (including harmonics);
Frequency: ≤± 0.01Hz;
4-20mA output: 0.5 level.
? 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.
? Telesignaling resolution
Less than 2ms.
? 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.
