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Terasaki OCR Checker TNS-3

Terasaki OCR Checker TNS-3

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Hard Case 5kg 43L 38W 18H
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1 month
2 month
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The Terasaki OCR Checker TNS-3 is a specialised tool designed for comprehensive field-testing of Terasaki ACB protection relays and circuit breakers. This robust device simplifies how professionals check various trip functions, including long time-delay, short time-delay, instantaneous and ground fault trips. It also efficiently tests the pre-trip alarm function of the OCR.

The TNS-3 is essential for maintaining the optimal performance of electrical systems. Its user-friendly interface, combined with its precise operation under a range of conditions, makes it an indispensable asset for professionals in electrical maintenance and troubleshooting.

Operation: Front control push button
Operating temperature range: 0 °C … +35 °C Nominal temperature range: 18 °C … +28
°C Storage temperature range: -30 °C … +60 °C
Weight: 1.1 kg without accessories

Key Features

  • Accurate testing of long and short time-delay, instantaneous and ground fault trip functions
  • Enables pre-trip alarm function testing for OCR
  • User-friendly interface with simple control push button
  • Operates effectively within a temperature range of 0 °C to +35 °C
  • Lightweight at only 1.1 kg without accessories for easy transport
  • Durable construction suitable for various environments


  • Electrical system maintenance — The TNS-3 is essential for routine checks and maintenance of electrical systems. It ensures that all protective relays and circuit breakers function correctly, preventing potential system failures and enhancing overall safety in electrical infrastructures.
  • Troubleshooting and diagnostics — In diagnosing electrical issues, the TNS-3 is a critical tool to have. It helps identify problems with trip functions in protective devices, allowing for quick resolution. This reduces downtime and ensures that electrical systems remain operational and reliable.
  • Safety compliance checks — The TNS-3 aids in verifying that electrical systems comply with safety standards. By testing trip functions and pre-trip alarms, it verifies if all safety mechanisms are active and effective.
  • Educational and training purposes — The device is also used in educational settings for training electricians and engineers. It provides hands-on experience in testing and understanding the operation of protective relays and breakers.
  • Quality assurance in manufacturing — In manufacturing settings, the TNS-3 ensures the quality and reliability of newly produced or repaired electrical components. It tests the functionality of protective devices before they are deployed or returned to service.

Hire the Terasaki OCR Checker TNS-3 today

Experience the ease and efficiency of equipment rentals with Brandis Hire, where top-quality devices meet exceptional service. With our user-friendly online ordering, 24/7 technical support and Australia-wide shipping at no extra charge, we make equipment rental absolutely stress-free. 

The Terasaki OCR Checker TNS-3 is ready for your projects — submit your booking request now or contact us for more information.


Why hire the Terasaki OCR Checker TNS-3?

The Terasaki OCR Checker TNS-3 is a highly efficient tool for testing protective relays and circuit breakers. It offers accurate assessments of long-time-delay, short-time-delay, instantaneous and ground fault trip functions, as well as pre-trip alarm functions.

Its user-friendly design, with a front control push button and a light weight of 1.1 kg without accessories, makes it convenient for field use. The device operates effectively in a wide temperature range (0 °C to +35 °C), ensuring reliable performance in various conditions.

What other circuit breaker testers and secondary injection testing equipment do you offer for hire?

At Brandis Hire, we offer a diverse range of circuit breaker testers and secondary injection testing equipment to suit different testing requirements and project needs. Our selection includes:

Circuit breaker testers:

Secondary injection testers:

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Terasaki OCR Checker TNS-3