ST testing equipment

Professional ST detection system - A precise testing solution tailored for compressor overcurrent protectors
Huikong Company is committed to providing outstanding quality inspection equipment for the refrigeration and compressor industry. Our ST testing equipment is a high-precision, fully automated testing system specifically designed for the performance verification of overcurrent protectors in compressor motors. This system, with impeccable precision and reliability, ensures that the action/reset characteristics of each protector fully comply with the design specifications, laying a solid foundation for the safe operation and long service life of the compressor.
Core system composition: Three-in-one, precise coordination
This system is precisely composed of three core modules, perfectly simulating the real working conditions of the protector and performing rigorous tests.
1. Intelligent PLC Control Center - System Command brain
Process Master: Equipped with high-performance industrial PLC, it precisely controls the entire testing process, including current loading, time monitoring, result judgment and data recording.
Simulation working conditions: Programmable editing of instantaneous high current accurately simulates real scenarios such as compressor motor overload and locked rotor, verifying the performance of the protector under dynamic conditions.
Data hub: Responsible for collecting, processing and transmitting all key data (action current, action time, reset time, etc.), and can be seamlessly integrated with the MES system to achieve full-process data traceability and quality analysis.
2. High-precision programmable constant current source - Test energy core
Precise excitation: It offers ultra-high precision, wide-range (from milliamperes to tens of amperes) continuously adjustable constant current output, which is the cornerstone for measuring key parameters such as operating current and reset current.
Fast response: Extremely fast current establishment and disconnection speed, capable of accurately capturing the instantaneous current value when the protector trips (I-t characteristic), and precisely measuring its action response time.
Stable and safe: The output current ripple is extremely small, with extremely high stability, ensuring the consistency and repeatability of the test. It is equipped with multiple overload protections to ensure the safety of the device and the test subject.
3. Dedicated test Station - A safe and efficient execution terminal
Quick adaptation: The workstation fixture is specially customized for the shape of the protector, using probe or pneumatic clamping methods to ensure stable and reliable electrical connections, with extremely low contact resistance, and can be quickly changed.
Result visualization: Equipped with three-color lights, a buzzer and a human-machine interface (HMI), it can display in real time results such as "passed", "action current out of range", and "action time too long", which are clear and intuitive.
Core testing function
Operating current test: Accurately determine the critical current value when the protector trips.
Reset current/time test: Determine the state of the protector being reconnected after cooling.
Action time test: Measure the response time from the application of overcurrent to the tripping of the protector.
Withstand voltage insulation test: (Optional) Conduct electrical safety performance tests.
System advantages
Ultimate precision: Optimized for low-resistance and high-current testing, the measurement accuracy of key parameters far exceeds industry standards.
High efficiency and stability: The automated testing has a fast cycle and can operate continuously and stably for 7x24 hours, greatly enhancing the efficiency of factory inspection.
traceability: Complete data recording and traceability functions provide strong data support for product quality analysis.
Safe and reliable: The full-process safety interlock design ensures the safety of operators and equipment.

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Let's use our professional ST testing system to ensure the quality of your products!