变电站值班员高级工（Substation attendant, senior engineer）.docVIP

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变电站值班员高级工（Substation attendant, senior engineer）.doc

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变电站值班员高级工（Substation attendant, senior engineer）

变电站值班员高级工（Substation attendant, senior engineer） Substation attendant; advanced work item bank I. judgment 1, the original pay Party autoformer energy transfer, both electromagnetic induction and direct transmission power (V) 2, when the accident occurred in the system, allowing the transformer overload operation (V) 3 、 the compensating capacitor connected on the line is to compensate the reactive power. (x) 4, shunt capacitor can not improve the power factor of inductive load itself. (V) 5, lightning arrester and protected equipment closer, the better. (V) 6 、 leakage current on insulating tools mainly refers to the current flowing through the insulating surface. (V) 7 、 when the ratio error of current transformer exceeds 10%, the correct action of relay protection will be affected. (V) 8, indoor isolation switch leakage ratio, distance, outdoor isolation switch leakage ratio is small. (V) 9 、 the capsule in the transformer oil pillow can separate the air from the oil and adjust the internal oil pressure. (V) 10, when the three-phase load of the transformer is asymmetrical, the negative sequence current will appear. (V) 11. The charging time of the capacitor in the reclosing is usually 15~25s. (V) 12, the voltage fast breaking protection must be equipped with current locking element to use. (V) 13. The operation time of breaker failure protection shall be greater than the tripping time of the fault line breaker and the sum of the return time of the protection device. (V) 14. The amount of input of cooling equipment in forced oil circulation air-cooled transformer shall be determined according to transformer temperature and load. (V) 15. Ferroresonance overvoltage is generally represented by the rise or decrease of the three-phase voltage. (x) 16. The main transformer protects the exit signal, and the current through the relay coil is the action current of all kinds of faults. (x) 17, the collision protection, so that after the circuit breaker trip, automatic reclo