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Voltage Monitoring Relay

Voltage Monitoring Relay
Voltage Monitoring Relay
Product Code : B1 VCR1
Product Description

Voltage Monitoring Relay

These relays are best suitable for monitoring balanced or unbalanced supplies, either of single phase, 3-phase 3-wire or 3-phase 4 wire loads powered by generators, UPS, stabilizers, inverters, or Mains (by Electricity Boards / Utilities); in AMF panels, PCCs, distribution boards and for power monitoring of individual loads / motors / pumps.


  • Fixed/adjustable under/Over trip settings for parameters.
  • Fixed/adjustable trip delays and Power On delays
  • Built-in or external power supply
  • Resetting -Auto or Manual
  • Output contacts : 1 CO or 2 CO
  • Choice of enclosures (DIN-Rail, Flush)
  • Models with Micro-Controller based design
  • Use of SMD Technology
  • User-friendly LED indications


  • Under/over Voltage,
  • Under/Over Current
  • Under/Over Frequency
  • Reverse Power

System supply

220/230/240 V AC (+20%-30%), 50/60 Hz ±3%

Output Relay Contact

2 CO

Trip setting

Under voltage

75-95% [variable] of set value

Over voltage

150-120% [variable] of set value

Trip time delay

2-5 sec. (fixed) (UV/OV)

Power on delay


Auto Reset


140 gms

Dimension mm

Overall (LxWxD)



68mm centre to centre/ 35mm rail mounting

Contact Us

Fangdouyan Industrial Zone, Liusi, Yueqing, Wenzhou, Zhejiang, China