The Improving Design of Gas Insulated Metal-enclosed Switchgear for Low Temperature Operation

To solve engineering applications of gas insulated metal enclosed switchgear in the low temperature region, partially improve design of normal product that can be satisfied to this requirement.Circuit breaker adopts the external heating device for compensating temperature of the way to ensure normal gas chamber pressure value.The electric field of disconnector and earthing switches is analyzed and calculated, by optimized internal structure and electric-field distribution, retention shell size unchanged. Through theoretical analysis and experimental verification, the product can meet stable and reliable operation in low-temperature region.