High-voltage circuit breaker construction and installation points
1. Details of the power system, ie system nominal voltage and maximum operating voltage, frequency, phase number and neutral grounding details.
2. Operating conditions, including minimum and maximum ambient air temperatures, whether the latter is above the rated value; whether the altitude exceeds 1000 m; and any special conditions that may exist or occur, such as excessive exposure to water vapor, moisture, smoke, explosive Conditions in gas, excess dust or salty air.
3. Characteristics of the circuit breaker.
1 pole number;
2 indoors or outdoors;
3 rated voltage;
4 rated insulation level;
5 rated frequency;
6 rated current;
7 rated line charging breaking current (if used);
8 rated cable charging breaking current (if used);
9 rated single capacitor bank breaking current (if used);
10 rated back-to-back capacitor bank breaking current (if used);
The rated capacitor bank is connected to the inrush current (if used);
Rated small inductive breaking current (if used);
Rated short-circuit breaking current and electrical life;
First opening factor
Rated outlet end fault transient recovery voltage;
Rated near-zone fault characteristics;
Rated short circuit closing current;
Rated operation sequence;
Rated short circuit duration;
Rated out-of-step breaking current (if used);
Rated breaking time;
Type test (artificial contamination and radio interference) specified under special requirements
test);
Operating frequency
Others, such as rated time parameters, out-of-phase grounding and closing characteristics.
4. Characteristics of the circuit breaker operating mechanism and its special attachments.
1 mode of operation: hand or power;
2 the number and type of spare auxiliary switches;
3 Rated supply voltage and rated supply frequency.
(5) Requirements for the use of compressed air and design and test requirements for pressure vessels.
The high-voltage circuit breaker testing institutions can be Suzhou Electric Science Research Institute, West High School, and Wugao Office!
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