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ABB VHXM23A Static Protection Relay

ABB VHXM23A Static Protection Relay
ABB VHXM23A Static Protection Relay
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Product Code : AXR_25
Brand Name : ABB
Product Description

ABB VHXM23A Static Protection Relay

ABB VHXM23A Static Protection Relay - Over Relay without Time Delay

Technical Specification of ABB VHXM23A Static Protection

  • Type: Electro Mechanical Relay.
  • Protection Type: Static Protection Relay.
Technical Specifications  Details
Model No : VHXM23A
Relay type VHXM23A Static Protection
Auxiliary voltage 63.5/110/240 V AC, 80-140%, 24/30/48/110/220 V DC
Type of mounting Flush mounting
Contact configurations 6NO+0NC/ 3NO+3NC/
Typical applications Over voltage protection


The relay type VHXm is a static under/over voltage relay used for detection of under voltage (or loss of voltage) or over voltage in the AC system. Relay is used for over voltage protection and supervision in distribution systems. Relay is also used for overvoltage / undervoltage protection of Generators, Motors and Transformers.

Design and principle
The VHXm is a AC voltage measuring relay. Different versions are available for a) Fixed voltage setting with instantaneous operation b) Variable voltage setting with or without variable time delayed operation. The AC voltage to be measured is applied at terminal 3 and 4. The input voltage is isolated, scaled and suitably conditioned for measurement.

Operating voltage level and time delay can be set with the potentiometer on the front-panel of the relay.
The product of the potentiometer setting and multiplier (marked) is the set operate time for relay.
The VHXm is powered by a DC auxiliary supply. The relay has a built-in electro-mechanical output relay providing medium duty contacts. The output relay also has one red hand reset flag. The relay is available in draw-out type flush
mounting model.

 Static design
 Variable voltage setting
 Variable time delay setting
 Draw-out type design
 Hand reset flag


  • VHXm22A (40-80% of Un Under voltage, W/O time delay)
  • VHXm22B (40-80% of Un Under voltage, with variable time delay)
  • VHXm23A (80-140% of Un Over voltage, W/O time delay)
  • VHXm23B (80-140% of Un Over voltage, with variable time delay)
  • IRXm

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Mr. Dnyanesh Gawande (Partner)
Mobile :+919833686249