الوصف

1. Functions and applications

1).funtions

RD*-W 3 phases voltage monitoring relay is used to test 3 phase power, protect electric machine and other loading. Voltage display, over voltage and under voltage protection, phase protection, phase loss protection, counting and timing. Record the fauits times and timing.

 2).Applications

Avoid the danger of the reverse operation(lifts, transports, elevators, escalators, ect.)

The sensitive three-phase power control. 

Prevent the risk of transmission load(phase loss)

Switch for normal and emergent power

2.Working principle

1).Connect the three phases to terminals L1,L2, L3.No need for extra power supply for the phase relays. It is powered by the three terminals.
 

2).When the terminals are conducted, relays pull-in voltage, LED lights and it will show the current voltage. if the phases are correct and each voltage is correspond to what has been set.

When over voltage, the relay is off. It shows Over voltage on LCD in English.

When under voltage, the relay is off. It shows under voltage on LCD in English.

Working times, working time, fault times and fault time can be switched by key.
For more product details please contect me
Warmly welcome to contec me
Brandy Wang

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