Protection Relays

Power distribution is a complex network of generators, high voltage cables and transformer sub stations. To optimise the network, monitoring has to be performed at strategic points. Measurements of under voltage and over currents are made by devices called protection relays. The information is communicated to a central control office from where changes can be implemented to ensure efficient and reliable operation of the power grid. Because of their proximity to power switching devices, protection relays are tested with high voltage insulation and damped oscillatory wave impulses.

Application Standards

  • IEC 61850-3
  • ANSI C37.90
  • IEEE 1613
  • IEC 60255-26
  • IEC 60255-27
  • ANSI C37.90.3

Test Types

  • 2/50µs Voltage Insulation
  • EFT/Burst Impulse
  • 1 MHz Damped Oscillatory Wave
  • Combination Wave Impulses

Product Page

Multi function Damped Oscillatory Wave (DOW) generator
Compact generator for Damped Oscillatory Wave testing. Integrated three phase CDN for Slow and Fast waves. Magnetic Field output for 1m or 2m coil. Can be extended with insulation test impulses up to 8 kV.
Handheld ESD Simulator with modular discharge networks
AA Battery operated handheld ESD Simulator up to 30kV. Modular design with networks for a broad range of standards and applications.
8KV EFT/Burst, SURGE, Ringwave and 10/700us impulse generator
Compact generator for EFT/Burst, SURGE, 100 kHz Ringwave and 10/700 impulses up to 8KV. Integrated 16 A CDN. Extend with ESD, Dips/Interrupts and Common Mode.
Insulation test system 1.2/50 up to 12kV
1.2/50µs lightning impulse generator up to 12 kV with 40 Ohm impedance. High voltage outputs on top plate protected by TC-ST test cabinet.

Options & Comfort
Protection relays are usually connected to long lines collecting data from voltage and current transformers. This requires additional tests for common mode disturbance. IMU generators can include this test for frequencies up to 150 kHz.

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