DC Thermal Stability Test For SPD

The DC thermal stability tester is applicable for the thermal stability test of SPDs. It is for indoor operation. One DC power source with a constant current between 2mA ~5A is applied on the SPD. The current through the SPD and the surface temperature of the SPD are continuously monitored to check if it reaches thermal equilibrium, and the disconnectors act.

• Requirement of input power: L1-L2, AC220V, 60Hz, 18kVA;
• Output AC voltage: maximum DC 3500V with measuring accuracy of ±10%;
• Output current: maximum 5A with measuring accuracy of ±10%;
• Voltage and current measurement: RMS;
• Voltage waveform: AC sine wave, waveform distortion rate less than 5%;
•  Current adjustment range for AC:2mA-5A (4 ranges: 2-10mA, 10mA-100mA, 100mA-1A, 1A-5A);
•  Operation time: more than 15 minutes @ maximum output current;
• Temperature measurement range: 0-200 degrees centigrades, measuring accuracy is ±1 degrees centi grades;
• Temperature measurement: 8 channels (K series), Omega thermocouple;
• Dimension of the control cabinet is W x D x H=1200x900x1700mm, weight is about 300kgs;