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Products  /  Series  /  μMATRIX  /  2V164-S


  • Large STN graphics LCD
  • System status LED indicators
  • Simple menu setting procedure
  • 40-300V DC aux. supply
  • 40-275V AC aux. supply
  • 20-70V DC aux. Optional
  • Self diagnosis & fail alarm
  • Size 4M case
  • Made in Australia

The 2V16x Series relays are designed for the control of motor driven on-load power transformer tap changers. The 2V164-S Voltage Regulator Relay continuously monitors the transformer output voltage & current & provides “RAISE” & “LOWER” control commands to the on-load tap changer such that the load centre is automatically maintained within acceptable limits. Small variations in supply frequency will not affect the system performance. When designing the 2V164-S, considerable emphasis was placed on producing a relay which would be very simple to install, set up & operate in the field. The result is a simple yet effective & very dependable voltage regulator relay available at a competitive price. The relay is very easy to set up due to the large screen LCD HMI & PC programming port. RMS 2V164-S Relays have many in built features to simplify the interface with OLTC’s to provide a reliable, effective & simple to operate voltage control system.

Changes introduced on the 2V164-S

  • Case length reduced by 18mm to suit 4M56-S case;
  • LED backlighting to reduce EMC emissions – contrast adjustment no longer required;
  • Front panel USB programming port to increase data transfer speed and improve compatibility with notebook PC’s;
  • Network communications port is now optional to maintain low cost of base model;
  • Network communication port maintained the optically isolated RS485 serial port but the RS232 configuration option has been deleted;
  • New current and voltage channels to improve measurement stability;
  • New status input option covering 18-275V AC and 300V DC range;
  • Updated switchmode power supply to reduce EMC emissions and improve transient overload protection;
  • Surface mount production technology to allow increased component density for additional functionality now and in the future.

What has not changed from the 2V164

  • I/O and basic functionality has been maintained;
  • Basic menu structure and operation has been maintained;
  • Electrical terminal mapping has not changed allowing existing wiring diagrams to be maintained;
  • Compatibility with existing application software back to version 0500 maintained;
  • Compatibility with existing uMATRIXwin programming software maintained;
  • Modbus RTU network communication protocol maintained Case size 4 has been maintained although the length has been reduced.
  • Made in Australia

This page is designed to provide the latest technical information and software downloads for the 2V164 Relay.

The compatibility of a specific software application version with a hardware Type Number can be verified from the Compatibility.pdf document.

Use the “Save File As” command to download the required ZIP file which contains four items:

.umx software file
.ump sample parameters setting file
.pdf functional description
.pdf Modbus allocation tables for network communications port

The last 4 digits of each .zip file is the software version number which can be checked against the issue level of a relay’s software by accessing the DIAGNOSTICS page from the front panel. This is done by pressing the DATA and SET buttons simultaneously, moving the curser over “VERSION” and pushing SELECT. To load a .umx or .ump file you need to connect to the relays RS232 port using a PC with the uMATRIXwin software.

uMATRIX Setting Files

View historical relay parameter setting (.ump) files

2v164 ldc calculation tables

LDC calculation tables for 20, 40, 60, 80, 100 & 120% of load current.


Application “A” Software, parameters & functional Description.


Application “B” Software, parameters & functional Description.


Application “C” Software, parameters & functional Description.


Application “G” Software, parameters & functional Description.


Application “I” Software, parameters & functional Description.


Application “J” Software, parameters & functional Description.


Application “K” Software, parameters & functional Description.


Demonstration Citect SCADA screen for “C” Application Software.

2V164-S Technical Bulletin

2V164-S User Guide