The Complete Temperature Rise Steady Current Power Supply is primarily used to provide stable AC current for temperature rise tests on transformers, switchgear, circuit breakers, busbars and other electrical equipment. During temperature rise testing, the load impedance of the device under test changes as temperature increases, making it difficult for conventional power supplies to maintain constant current. The steady current power supply utilizes closed-loop feedback control to automatically adjust output voltage, keeping the test current at the set value at all times, thereby obtaining accurate temperature rise data.

Application scenarios:

• Temperature rise tests for oil-immersed / dry-type power transformers
• Temperature rise tests for switchgear and distribution panels
• Temperature rise and tripping characteristic tests for circuit breakers and fuses
• Current-carrying temperature rise tests for busbars and connectors
• Calibration and aging tests for high-current relays and instrument transformers

• Automatic Steady Current Control: Adopts current closed-loop feedback regulation. Automatically raises or lowers output voltage when the impedance of the device under test changes, maintaining constant test current with high steady-current accuracy.
• Integrated Complete Set: Integrates voltage regulator, current-stabilizing reactor/transformer, control system, measuring instruments and protection devices into standard cabinet enclosures, minimizing on-site wiring and ensuring convenient deployment.
• Low-Voltage High-Current Output: Low output voltage and high output current, matching the temperature rise test requirements of transformer low-voltage windings or switchgear main circuits.
• Multi-Stage Current Setting: Multiple test current values can be preset, supporting automatic switching between different test stages such as rated current and overload current.
• HMI Interface: Equipped with touch screen or digital display panel, showing voltage, current, power and running time in real time for intuitive operation.
• Comprehensive Protection: Features overcurrent, overvoltage, overtemperature, short circuit and phase-loss protections, supporting long-duration continuous operation.

1. Select by Test Current: The rated output current should be 1.1–1.2 times  test current of the device under test to ensure adequate steady-current margin.
2. Select by Output Voltage: The output voltage must cover the total impedance voltage drop of the test circuit at operating temperature, typically with 20%+ margin.
3. Select by Steady Current Accuracy: Standard accuracy is ±1%; high-precision testing applications can opt for ±0.5% solution.
4. Select by Operating Time: For temperature rise tests of 8 hours or longer, confirm the equipment's thermal dissipation and continuous operation capability.
5. Control Mode Recommendation: Testing stations and automated production lines are recommended to select PLC automatic control and data recording functions for easy test report generation.