Phase Loss 3 Phase Control Relay 2C/O Contacts For 4 Wires Refrigerator

Phase sequence protector is a multi-function three-phase power system or three-phase power equipment monitoring and protection equipment.

The phase sequence protector can display the three-phase power supply voltage in real time, and can output through the relay when the power supply overvoltage protection, undervoltage protection, phase loss protection, unbalance protection, fault phase protection, PTC temperature protection, load side protection and other faults occur. The form provides the user with an alarm output and the contact control signal output by the protection circuit action, which functions as an alarm and protection. Sets three-phase voltage display, over-voltage protection, under-voltage protection, phase loss protection (phase-failure protection), voltage imbalance protection, phase sequence protection (wrong phase protection) in one, using a powerful microprocessor chip and non-easy Loss of storage technology, display using high-definition ultra-wide temperature Chinese liquid crystal, with full-featured, stable performance, intuitive display, easy operation.

1 . High-precision : phase sequence protector uses a powerful microprocessor chip, the traditional technology uses AC sampling technology, voltage measurement accuracy of ± 1%, the new technology uses true RMS measurement technology, measurement is more accurate, the error is less than 1%, at the same time The three-phase power supply phase voltage values ​​can be displayed separately, which is equivalent to the functions of three voltage meters. ZHRV wide power frequency: phase sequence protector can be applied to 45 ~ 65HZ, to ensure universal use.

2 . Wide power supply voltage : The phase sequence protector can be applied to phase voltages of 150-300V (line voltage 250-500V), which greatly reduces the size of the phase sequence protector, making it easy for users to choose, and at the same time reducing the amount of spare parts funds.
Independent Normally Open, Normally Closed Output: The phase sequence protector adopts high-power double-group contact relays, which can independently control devices with different voltage levels, and is more widely used.

3 . Visual display : The phase sequence protector adopts a dedicated wide temperature and high-definition Chinese liquid crystal display, and displays the three-phase power supply phase voltage value during normal operation; in case of failure, it directly displays the cause of the fault in Chinese, and it can simultaneously display which phase fault and the fault The voltage value is very intuitive and it is easy to quickly determine the cause and location of the fault.

4 . Fault Record : The phase sequence protector adopts non-volatile storage technology. When overvoltage, undervoltage, phase loss, imbalance, or phase sequence fault occurs, the fault is recorded. Even if this product is completely powered off, fault information can be memorized to facilitate troubleshooting.

5 . Installation method : The phase sequence protector base adopts rail type and has two M4 screw holes. It can be installed on HT35 rails or M4 screws. The two mounting methods are more flexible and convenient.

6 . Humanized Voltage Imbalance Protection : The phase sequence protector internally creates an optimized mathematical model that automatically adjusts the operating time based on the three-phase voltage unbalance and does not require user settings.

Features

• Compact modular size
• Three-phase monitoring of phase sequence.phase loss,over-and undervoltage and phase unbalance
• Adjustable over and undervoltage threshold and delay time(For JVED-xxxW)
• Neutral loss monitoring(for JVRN-xxxN&JVRD-NK)
• Powered by the measuring circuit
• 2C/O contacts
• Max 5 LEDs for status indication

Protective Functions

• Phase loss(Failure)
• Phase sequence(Reversal)
• Phase unbalance(Asymmetry)
• Undervoltage
• Overvoltage
• Neutral loss

Applications

• Pumps
• Fans
• Refrigeration units
• Blowers
• Motors
• Compressors
• Lifts,Elevators
• Cranes
• Mining excavators and conveyors