Our Products

1. The client's requirements are as follows:

Requirements for Hot Cycle Testing System for Railway Rail Fittings

System Purpose

The system is used to test the DC resistance, temperature rise, and thermal cycling characteristics of line hardware, with reference standards: GB/T 9327, GB/T 2317.3, GB/T 2317.4, and IEC 61284.

Basic Technical Requirements

Equipped with full functionality of the  Qingdao Naxinxiangyuan 3000A fully automatic high-current generator; typical test layout diagram

The typical loop length is 16 meters.

Additional technical requirements:

1. Features dual control modes for temperature regulation and current management, selectable as required;

2. Capable of performing DC resistance, temperature rise, and thermal cycling tests per specified standards;

3. Automatic circuit switching enables at least 5-stage DC resistance testing (layout shown in figure);

4. Temperature measurement supports up to 18 channels (layout shown in figure); 5. Provides real-time current, voltage, and phase difference measurements.

The specific solution is as follows based on the customer's technical requirements:

2. Main Functional Features

● Large LCD display screen for current, resistance, temperature, time, status information, and prompt messages, with clear and intuitive readings;

● Fully Chinese interface with simple and straightforward operation, adaptable to various application scenarios;

● Full touchscreen operation for intuitive, quick, and user-friendly control.

● Fully digital calibration system eliminates outdated potentiometer adjustments, offering exceptional field usability and precise control;

● Status alert functionality with guided operation enables proficient handling even without manuals;

● Automatic test result display that instantly determines test outcomes (passed/failed);

● Audio-based test result identification: Different alarm sounds indicate test success/failure for direct operator recognition;

● Pause function allows arbitrary current ramp-up/downhold during automated control, with customizable durations for sample observation;

● Flexible test duration settings ranging from 1 second to 999 hours;

● Automatic timing feature initiates countdown during operation, displaying results upon expiration and resetting to zero;

● Manual control mode mimics traditional motorized systems, featuring button-operated current adjustment, automatic limit detection, and overcurrent protection with fully manual operation;

● Manual mode current retention function maintains current at preset values through hold button activation when reaching specified thresholds.

● Equipped with stop/emergency buttons for manual reset;

● Intelligent current ramping control with automatic speed reduction when approaching target current;

● Data export functionality allowing device data to be stored on computers via USB drives for further processing.

● The protection system provides instant, accurate, and reliable response when faults such as overcurrent occur;

● During thermal cycling tests, circuit resistance measurement is automatically completed with automatic current output switching;

● The control interface features a local Kunlun Tong state 7-inch touchscreen operation. 

3. Main Technical Parameters

1、Thermal Cycle Test

Power supply voltage: AC 380V ±10%,50Hz ±1 Hz.

Power supply current: ≥39A.

Rated capacity: 45kVA.

Output voltage: AC 0–15V.

Output current: Long-term (continuous operation) AC 30–3000A.

Voltage measurement accuracy: 0.5% FS ±3 digits.

Current measurement accuracy: 0.5% FS ±3 digits.

Timing duration: 1 second to 9999.99 hours.

Temperature measurement: 24 channels.

hase testing instrument available for voltage and current phase angle measurement.

2、Loop resistance testing

Test current: DC 5-100A.

 Test range: 0.1 to 1999.99 microohms.

Function description: This test item is performed during thermal cycling tests. After completing the specified number of thermal cycles, the DC resistance of the specimen is measured. Equipped with an automatic switching device, it eliminates the need for manual wire replacement by operators.

Through software: Switching of nine-section lines

4.Main components