MCCB Short-Time Delay Trip Test Bench

Equipment Overview

The MCCB Short-Time Delay Trip Test Bench is a professional testing system used to evaluate the short-time delay protection function of Molded Case Circuit Breakers (MCCB).
Short-time delay protection plays a critical role in coordinating protection between downstream and upstream circuit breakers by allowing high current to flow for a limited time before tripping.

This test bench simulates high-magnitude fault currents with adjustable delay time, enabling precise verification of MCCB tripping behavior under short-time protection settings. The system allows accurate control of test current level, delay time, and test sequence, ensuring reliable and repeatable results

System Configuration

The test bench typically consists of the following systems:

• Control System
  Equipped with an advanced control system and intuitive operation panel, allowing flexible setting of fault modes, test current, and delay time parameters.
• Power Supply System
  Provides stable and adjustable voltage and current output to meet the testing requirements of different types and ratings of circuit breakers.
• Fault Simulation System
  Simulates various fault conditions, including overload, short circuit, and grounding, with precise control of fault current and delay time.
• Data Recording System
  Automatically records key parameters such as operating time, fault current, and delay cut-off time, generating clear and traceable test data for analysis and evaluation.
• Safety Protection System
  Integrated with multiple safety protections, including overload, over-temperature, and short-circuit protection, ensuring safe operation during testing.

Technical Specifications

After-Sales Service & support

We are committed to long-term cooperation with full technical support:

✅1-Year Free Warranty ：Covers all non-human damages. Replacement and repair included.

✅Lifetime Maintenance Support：We offer lifelong technical assistance and spare parts supply.

✅On-Site Installation & Commissioning：Professional engineers are available to visit your site for setup .

✅Operator Training：On-site or remote training to ensure your team can run the machine independently.

✅Remote Technical Support：Quick response via video call, remote control, Email, WhatsApp, and WeChat.

Why Choose This Test Bench

• Ensures consistent and repeatable test results

• Improves testing efficiency and reduces manual errors

• Supports multiple MCB ratings and curve types (B / C / D)

• Suitable for mass production environments

Why Choose TF Automation

• Specialized in low-voltage electrical automation equipment

• Extensive experience in low-voltage electrical testing solutions

• Strong customization capability based on customer standards

• Reliable technical support and long-term service commitment

References & Case Studies

Q&A

Q1: What is short-time delay protection in MCCB?

A: Short-time delay protection allows the MCCB to withstand high current for a short period before tripping, enabling coordination with downstream protection devices.

Q2: Which MCCBs can be tested with this bench?

A: The test bench supports MCCBs with LS or LSI protection units, covering different rated currents and frame sizes.

Q3: Can the test parameters be customized?

A: Yes. Test current, delay time, and test sequence can be adjusted according to MCCB specifications

Q4: How much does the MCCB Short-Time Delay Trip Test Bench cost?

A: The price depends on current range, delay settings, and configuration options. Please contact us for a customized quotation.