PHASE PROTECTION RELAY เฟสโพรเทคชั่น 380V W-PR3 WIP
W-PR3
3Ø Under, Over and Voltage unbalance with adjustable time delay & selectable voltage
The W-PR3 Phase Protection Relay is a digital electronic instrument designed
for AC voltage monitoring and protection in 3 phase 4 wire and 3 phase 3 wire system.
Used in application such as main failure, phase sequence, phase unbalance,
under and over voltage.
The W-PR3 is a designed to monitor the correct phase sequence of 3 phase system
(L1, L2, L3) With correct phase sequence applied the output relay will energizes (N/O)
and remains de-energized (N/C) if an incorrect sequence is applied,
the display will show “Pr”