Conditions of Use
Ambient temperature
Upper limit: +40℃
Lower limit: -25℃
Altitude: below 2000m
Humidity: The relative humidity does not exceed 50% when the maximum temperature is +40°C; higher relative humidity is allowed when the temperature is lower
Condensation conditions: yes
Earthquake basic intensity: 6 degrees fortification
Installation Location
Indoors, outdoors
Insulation resistance
The insulation resistance value of each closed busbar unit should be greater than or equal to 100MΩ (2500V megger).
Dielectric strength
Each section of the enclosed busbar is subjected to a 1-minute power frequency dry test withstand voltage test before leaving the factory.
Power frequency withstand voltage and lightning impulse withstand voltage values, in line with national standards.
Grounding system
Meet the requirements of IEC364-5-54 for grounding system.
Protection class
Indoor type: IP40; Outdoor type: IP43, IP55.
Load performance
Under the rated current, the temperature rise of the casing meets the requirements of GB763-90 "Heat of AC High Voltage Electrical Appliances in Long-term Operation".
Short circuit performance
The dynamic and thermal stability test meets the standard requirements of GB2706-89 "Test method for dynamic and thermal stability of AC high-voltage electrical appliances".
