digital Power phase sequence protector

Specifications

Power Proection Device
Current display;Overload protection;Phase-lacking protection,Three-phase unbalance protection;

Power Protection Device

 

Main Function

1.Current display: it can display three-phase average current and A, B, C three-phase current.

2.Overload protection: when overload, the relay will release, and cut off the motor’s power supply. There are definite time lag and inverse time lag two action ways. Definite time can be adjusted, providing five inverse time lag curved shape.

3.Phase-lacking protection: when you test phase loss, cut off the motors’ power supply, action time can be adjusted.

4.Three-phase unbalance protection: when you test three-phase current unbalance, you should cut off the motors’ power supply, the unbalance action point and spacing interval can be set.

5.Self recovery function: cut off the motors’ power supply because of faults, it can recover by itself some times, the times and spacing interval can be set

6. The function of lock faulty current: cut off the motors’ power supply because of fault occur,it can lock and display the current at faults occur moment.

7.  The function of time relay: as an additional function, its internal integrates a time relay.

 

The main technique parameter

Index	Model Number					Unit	Explanation
	VJ-701	VJ-702	VJ-704	VJ-706	VJ-708	A
The setting range of rated current set	1~80	1~20	1~40	1~64	1~80	A
Current range	150	150	450			A
Inverse time lag curved shape	Non	5				-
Definite time lag protecting  action time	0.1~20					Sec
The measuring accurate degree of current	±1%					-
Power supply voltage	AC 220V					V
The capability of output contact	2A/440VAC					-	Resistive load
The operating environment	Temperature -20°C~70°C, Humidity≤85%, no moist					-