Frequency and voltage protection device WXJ-810

Frequency and voltage protection device


1. Main protection function configuration
1) Low-frequency protection; 2) Over-frequency protection;
3) Overvoltage protection; 4) Pressure loss protection;
5) PT disconnection alarm; 6) fault wave recording function.
2. Main measurement and control function
1) 14 Lu letter open collection, device remote letter change, accident remote letter.Users can set the remote information quantity name and alarm method according to the actual requirements;
2) Uab, Ubc, Uca, F simulation quantities;
3) Protection event sequence record (SOE), etc.
3. Main technical indicators
3.1 Low-frequency protection
Low weekly value: 40Hz- -50Hz time value: 0.1S-9.9S
Fixed value error: <5%, including the frequency error: <0.01Hz
3.2 Overfrequency protection
Overfrequency fixed value: 50Hz- -60Hz time fixed value: 0.1S-9.9S


Fixed value error: <5%, including the frequency error: <0.01Hz
3.3 Overvoltage protection
Voltage value: 1Un-1.5Un time value: 0.1S-9.9S
Fixed value error: <5%
3.4 Pressure-loss protection
Voltage value: 0.5Un-1Un Time value: 0.1S-9.9S
Fixed value error: <5%
4. Simulation input
The input analog amount is: voltage amount Uab, Ubc, Uca as overvoltage and voltage loss protection amount and measured voltage.