A device for automatically switching bus voltage in railway traction station
A technology of automatic switching and bus voltage, applied in the direction of circuit devices, electrical components, emergency power supply arrangements, etc., can solve the problems of switching misoperation, secondary circuit voltage loss, non-maintenance, etc., achieve good stability and reliability, and avoid switching The effect of malfunction and convenient operation and maintenance
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[0023] The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.
[0024] Such as Figure 3-5 As shown, the traction substation of the electrified railway adopts the method of dual redundant hot standby, and two voltage transformers (set as voltage transformer PT-A and voltage transformer PT-B are set on the low-voltage 27.5kV bus ), a device for automatically switching the bus voltage in a railway traction station, comprising a voltage loss relay J1 and an overvoltage relay J2 connected in parallel at the output end of the voltage transformer PT-A, and a loss relay J2 respectively connected in parallel at the output end of the voltage transformer PT-B. Voltage relay J3 and overvoltage relay J4.
[0025] Wherein...
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