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Test bench for overcurrent protection devices

How to test overcurrent protection devices for high energy system?

Test bench for short-circuit and overcurrent protection devices for high voltage systems - ITHPP

How to test overcurrent protection devices for high energy system?

Test bench for short-circuit and overcurrent protection devices for high voltage systems - ITHPP

IITHPP develops customized solutions for customers who need to test the effectiveness of high-energy systems’ protection devices. These solutions consist of a test bench which will produce/simulate the overcurrent (according to customer specifications) applied to the customer's protection devices in order to assess its behaviour and its ability to protect equipment and people. This test bench is designed to assess protective very high energy / high power devices operating at several hundred volts and thousands of amps, such as electric vehicle batteries (EV) or DER systems (distributed energy resources).

Overcurrent protection devices: a critical component of high-voltage equipment

Overcurrent protective devices include circuit breakers, fuses or overcurrent relays. These safety devices are to protect the circuit from dangerous effects of overcurrent by cutting the electrical current in the event of an overload or short circuit. These protective devices must be in accordance with the voltage ratings and power of the equipment for which they are designed; otherwise, they may explode while attempting to stop faulty currents beyond their ratings. Potential damages (explosions, ignitions) can be all the more serious if dealing with a high energy electrical device. For this reason, overcurrent protective devices for systems with large energy storage capacity must meet special performance specifications.

Test bench tailored to customer specifications

In order to be able to determine the limits of these protective devices, ITHPP has designed a test bench specifically sized to replicate the effects of short-circuit in large energy storage capacity equipment / high power systems; such as the new generation of batteries for electrical vehicles or distributed energy storage systems.

The test bench developed by ITHPP operates on several types of current/voltage waveforms. The discharged parameter is modular and a human-machine interface system allows precise indications of the discharge parameters according to the settings. This results in a significant gain of time during experimental set-up. The bench is equipped with a shielded, non-flammable test chamber and includes a smoke evacuation system to eliminate any risk linked to a faulty system under test.

ITHPP’s knowledge, gleaned from experience is available to customers and scalable to meet their specific technical requirements. ITHPP can offer readymade technologies and existing techniques, modifications of said technologies and techniques or indeed completely innovative designs.

Main characteristics

of the test bench:

  • Current amplitude: 0 to 30 kA
  • Voltage: 0 to 1100 V
  • Stocked energy: 250 kJ
  • Stray inductance: < 1 µH