3 Phase Voltage Monitoring Relay , JVR-383 Motors Phase Loss Protection Relay

3 Phase Voltage Monitoring Relay , JVR-383 Motors Phase Loss Protection Relay

Phase failure Protection of Three-phase Motor
With the development of industrial and agricultural production, three-phase motors have been widely used, and various protective measures for motors have been adopted in the electrical control circuits of production machines. Because over-current protection, short-circuit protection, under-voltage protection, overload protection and zero-voltage protection are easily controlled, in many cases of phase failure, three-phase motors run at low speed and the stator current is very large, which can easily cause the motor to burn down. Serious loss. Therefore, more and more attention has been paid to the research on the "phase protection" of the three-phase motor.

From the current point of view, currently used three-phase motor phase failure protection device, the majority of users will not match, calculation and debugging, very inconvenient, and there is no memory after the phase, can not be used with the knife, use The range is limited; from the wiring point of view, for a Y-connected motor, when the phase is off, there is no current in the phase, and if there is a phase current in the other two phases higher than the rated current, the phase protector will be cut off. The power supply stops the motor and thus protects the phase failure. The situation in the △-type connection is not the same. In the case of the protector protection, the motor is still burned and the purpose of phase-failure protection cannot be achieved. Therefore, for the Y-connected motor, the current type and thermal effect type are used for phase protection, and the delta-connected motor phase protection is based on the voltage type for phase protection.

Voltage phase motor phase protector can be used in phase-off protection in Y-type and delta-connected motors. It overcomes the limitations of thermal effect type and current type in motor phase failure protection, and has low voltage and over voltage. Protection function for various motors under three-phase four-wire 380V power supply

Our JVR-383 is aim to protect the phase failure and voltage unbalance,the only two LED light is indication for phase loss or Normal , have the L1,L2,L3 measuring circuit for three phase monitoring and accept many kind of voltage like 220VAC 380VAC 440VAC 460VAC 480VAC

♦ Features

-- Three-phase monitoring of phase loss and phase unbalance

-- Powered by the measuring circuit

-- 1 C/O contact

-- 2 LEDs for status indication

♦ Protective Functions

-- Phase loss

-- Phase unbalance

♦ Typical Applications

• Pumps • Fans

• Blowers • Motors

• Compressors

♦ Approvals

• CE • CCC

♦ Technical data