Xu Ji WXJ-811S anti-island protection device

WXJ-811S microcomputer anti-island protection measurement and control device (hereinafter referred to as the product) is an advanced microcomputer integrated protection device, which can be used in 10KV and 0.4KV photovoltaic power generation projects.


n Main protection function
1) Quick break protection; 2) Two-section fixed time limit overflow protection;
3) Zero-order overcurrent protection; 4) Overvoltage protection;
5) Over-frequency protection; 6) Low-frequency protection;
7) Inverse power protection; 8) Joint jump function;
9) Low-pressure protection; 10) Overload.
Xu Ji WXJ-811S anti-island protection device
n Main measurement & control function
1) 10 Lu letter opening collection, device remote letter change, accident remote letter;
2) Remote control separation and closing of circuit breaker and signal node outlet;
3) IA, IC, UA, UB, UC, U0, I0, P, Q, F, COS and other 11 simulation quantities;
4) Protect the event sequence record (SOE), etc.
Xu Ji WXJ-811S anti-island protection device
n the key technical indexes
1) Set the time limit over the flow
Current fixed value: 0.1In- -20In Time fixed value: 0S- -60S
Sensitivity angle: 30o, 45o, 60o optional value error: <5%
2) Zero sequence overflow
Current fixed value: 0.1In- -20In Time fixed value: 0S- -60S
Fixed value error: <5%
3) Overvoltage and low pressure
Overvoltage setting value: 90V- -150V fixed value error: <5%
Low voltage value: 0V-150V value error: <5%
4) Overdue frequency and low frequency
Overfrequency fixed value: 48Hz- -55Hz
Low frequency fixed value: 46Hz-50Hz low voltage lock: 50V-100V
Lock-out of df / dt: 0.3Hz / s- - -10Hz / s fixed value error: <5%
Frequency error: <0.01Hz current locking value: 0.1In-1.1In
Xu Ji WXJ-811S anti-island protection device