Excitation type dual-power-supply quick change-over switch

Abstract

The invention discloses an excitation type double-power-supply quick change-over switch. The switch comprises a shell. A motor is arranged in the shell. The top end of a power shaft of the motor is fixedly connected with a conversion rod. A moving contact is fixedly mounted on the side wall of the conversion rod. A manual switching knob is fixedly mounted at the top of the switching rod. Static contacts are symmetrically arranged in the shell. The static contacts are symmetrically arranged above the moving contact by taking the conversion rod as a circle center. The two static contacts are wound with magnet exciting coils, and the two groups of magnet exciting coils are respectively connected with a first resistor and a second resistor in series. The beneficial effects of the switch are that the magnet exciting coils and a main circuit operate independently, are not affected by the main circuit, can be kept in a working state for a long time, and are not liable to break down. When a power supply is switched, the moving contact does not generate friction resistance with other positions, and the connection stability of a circuit is not influenced even if the moving contact and the static contact are abraded.

Description

technical field [0001] The invention relates to the technical field of a dual power supply transfer switch, in particular to an excitation type dual power supply fast transfer switch. Background technique [0002] A dual power switch is a switch that can switch between two power sources. With the development of society and economy, dual power switches are widely used in high-rise buildings, communities, hospitals, airports, docks, fire protection, metallurgy, chemicals, textiles, etc. Important places where power outages are not allowed. [0003] Existing dual-power conversion switches generally use mechanical locking devices to control the selection of power sources. The existing mechanical locking devices generally switch power sources through manual operation, which must be controlled by the operator at the switch site. First, it is inconvenient for the operator to control. , the switch cannot be switched at the first time, and manual control also generally has potential...

AI Technical Summary

Problems solved by technology

[0003] Existing dual-power conversion switches generally use mechanical locking devices to control the selection of power sources. The existing mechanical locking devices generally switch power sources through manual operation, which must be controlled by the operator at the switch site. First, it is inconvenient for the operator to control. , the switch cannot be switched at the first time, and manual control also generally has potential safety hazards, so it is not suitable for promotion and use

[0004] In the normal and standby switching of the automatic dual power supply switch, occasional stuck problems occur during the switching process due to parts, causing the coil to work all the time and burn out. The moving contact and the static contact wear more seriously when powering on, and the connection step between the moving contact and the static contact will be stable for a long time.

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