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Relay Test Sets


Get Accurate Relay Readings


Protecting electrical relays is important to keep operations running smoothly. To fully test the multiple protection functions of today’s relays, you need sophisticated relay test equipment.


Every facet of testing can be handled with the comprehensive relay testers from Electro Rent. With the devices in our inventory, you can determine the performance of single or three-phase protective relays with absolute precision by measuring electrical, electromechanical, and timing characteristics.


Electro Rent offers a comprehensive range of relay test equipment with manual and automated relay test capabilities. The details of the relay testers available from Doble, Manta, Megger, Noram and OMICRON are presented below.

Doble F6150 Relay Test Set

Doble Phase Relay Test Set


Now with increased output power (six independent 175 VA sources), the F6150SV does standard relay calibration and verification testing of high burden and microprocessor relays.


  • One fiber and one copper IEC61850 port are included.
  • End to end testing with GPS time syncing.
  • This relay test set does metering of 0.2 class CTs and transducers.
  • 12 source unit (6 voltage, 6 current).
  • PC interface (Ethernet or USB) for steady state, dynamic state and transient testing.
3 Phase Relay Test Set Manta MTS-5100

Manta 3 Phase Relay Test Set


Features of this relay tester include 3-phase AC voltage, AC/DC current and DC voltage, 30A six-phase or 180A single phase, and sufficient VA for electromechanical relays.


  • The Manta MTS-5100 tests protection and control relays.
  • There are 12 contact voltage inputs with 4 contact outputs.
  • IEC 61850 and GPS time- synchronized testing.
  • Intuitive operation combined with direct front panel interface for all functions.
Single Phase Relay Test System Megger SMRT1

Megger Single Phase Relay Test System


This small, rugged, lightweight, and powerful relay tester operates with or without a computer. Output power ratings are 75 Amps (with 15A convertible AC current source) /400 VA(2) Ethernet output ports. This unit optionally works in conjunction with the 3-phase relay test set SMRT36-P1.


  • Manual operation is achieved with the Smart Touch View Interface (STVI).
  • Fully automated testing using AVTS software.
  • Current channel is rated 30 Amps at 200 VA continuous.
  • Up to 60 Amps at 300 VA for short durations.
Megger SMRT36-P1

Megger 3 Phase Relay Tester


This is a very small and lightweight 3 phase relay test set. Manual operation is achieved with the Smart Touch View Interface (STVI) and it is fully automated testing using AVTS software.


  • Measurements: 14.2 W x 7.6 H x 12.0 D in.
  • Weight: 27.9 lbs.
  • Convertible channels provide 6 currents.
  • This unit tests all types of protective relays.
  • Each current channel is rated 30 Amps at 200 VA continuous.
  • Up to 60 Amps at 300 VA for short durations.
  • Multiple SMRT units connect via Ethernet for synchronous multi-unit operation.
3 Phase Relay Test Set Noram Mentor12-36

Noram 3 Phase Relay Test Equipment


This relay test set contains 3 reversible voltage/current channels, including 3 x 150 V or single-phase 450 volt. The Noram-SMC Mentor also has 6 current channels (3 x 50 A, 6 x 25 A or single phase 150 A).


  • Easily test single or 3 phase electromechanical and digital relays.
  • Computer generated test reports.
  • Communications include RS-232, (2) USB, Ethernet, Centronics, PS2 and VGA.
OMICRON CMC 256Plus Precision 3 Phase Relay Test Set

OMICRON Precision 3 Phase Relay Test Set


The OMICRON 256PLUS is a high precision relay tester and universal calibrator for applications requiring high accuracy including energy meters of class 0.2 and measuring transducers. The accuracy of this unit is ideal for protection and measurement equipment manufacturers for research and development, production, and type testing.


  • Unit tests protection relays such as numerical, static and electromechanical.
  • This test set has 6 current (6 x 12.5 A) and 4 (4 x 300 V) voltage output channels.
OMICRON CMC 356 3 Phase Relay Test Set

OMICRON 3 Phase Relay Tester


The OMICRON unit has powerful current sources for testing high-burden electromechanical relays. The 6 current (6 x 430 VA) and 4 voltage output channels are independently adjustable, and it also features high current amplitudes for 5 A relay testing.


  • Test Universe software with manual and automated testing functionality.
  • End-to end testing with optional GPS accessory.
  • Manual control with the optional CM control unit.
  • IEC 61850 and dedicated recloser cabling for Cooper, Schweitzer and S&C Intellirupters.
  • USB and 2 Ethernet interfaces.

With Electro Rent’s flexible acquisition options you can rent, lease, or purchase relay testers to meet your short and long-term needs. Reach out to us today!