England Box-type fixed high-voltage switchgear (XGN)
Product Description
Main Technical Conditions for Tendering and Ordering High-Voltage Switchgear
Environmental Conditions (mainly include) 1. Altitude; 2. Ambient temperature; 3. Maximum daily temperature difference; 4. Relative humidity; 5. Seismic resistance; (1) Horizontal acceleration; (2) Vertical acceleration; (3) Safety factor. (4) Installation location, etc. | Operating Conditions (mainly include) 1. Rated operating voltage; 2. Maximum operating voltage; 3. Rated current; 4. Lightning impulse voltage; 5. Rated frequency; 6. Power frequency withstand voltage; 7. Short-time withstand current; 8. Rated dynamic stability current; 9. Neutral point grounding method, etc. | Technical Requirements for Main Components inside High-Voltage Switchgear 1. Circuit breaker (1) Circuit breaker type; (2) Rated voltage; (3) Operating voltage; (4) Rated frequency; (5) Rated current; (6) Vacuum degree; (7) Rated breaking current (RMS); (8) Rated making current (peak); (9) Rated steady-state current (RMS); (10) Short-time withstand current (RMS); (11) Power frequency withstand voltage; (12) Lightning impulse voltage; |
Overall Switch Requirements
1. Switchgear interlocking requirements (mainly referring to the provision of necessary mechanical and electrical interlocking devices);
2. Incoming and outgoing line forms of the switchgear;
3. Requirements for all secondary insulation components (such as terminals, auxiliary switches, and plugs) in the switchgear;
4. Requirements for measuring and display instruments;
5. Requirements for the installation form of incoming voltage transformers, metering voltage, and current transformers;
6. Requirements for the form and installation location of the live display and grounding switch;
2. Comparison with related products
In addition to armored and compartmentalized high-voltage switchgear, metal-enclosed high-voltage switchgear has the following characteristics:
(1) Fewer compartments than armored and compartmentalized switchgear;
(2) The protection level of the partition is lower than the relevant regulations;
(3) No partition.
3. Construction and Installation Points
(1) The installation of complete sets of cabinets should meet the following requirements:
(1) Mechanical and electrical interlocks should be accurate and reliable.
(2) The center lines of the moving and static contacts should be consistent, and the contacts should be tightly connected.
(3) The switching contacts of the secondary circuit auxiliary switches should be accurate and reliable.
(4) Complete internal lighting.
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