Bistable permanent magnetic three-phase breaker

Abstract

The invention discloses a bistable permanent magnet three-phase circuit breaker, which comprises a base, a casing, a load-side three-phase wire connector and a power supply-side three-phase wire connector, a casing is arranged on the surface of the base, a coil is arranged inside the casing, and a coil is arranged on the surface of the casing. For the upper wiring tube and the lower wiring tube, one side of the shell is provided with a load-side three-phase wire joint, and the other side of the shell is provided with a power-side three-phase wire joint. The upper holding permanent magnet is installed inside the shell, and a power supply is installed next to the upper holding permanent magnet. Side static contact, next to the static contact on the power supply side, there is a lower holding permanent magnet, next to the lower holding permanent magnet, a sliding iron core, under the sliding iron core, a load side moving contact, and next to the load side moving contact, a power supply side contact. The beneficial effect is that: the present invention no longer needs to maintain the electromagnets to consume energy after the state transition, and there is no noise and magnetic field effects that may be emitted when the electromagnets work continuously, and is environmentally friendly and energy-saving, and the switching speed is fast.

Description

technical field [0001] The invention relates to the field of electric power industry equipment, in particular to a bistable permanent magnet three-phase circuit breaker. Background technique [0002] A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The division of high and low voltage boundaries is relatively vague. Generally, those above 3,000 volts are called high-voltage electrical appliances. At present, most of the low-voltage three-phase switches (0.4kV) in the distribution network do not have the function of electric closing, and a small number of three-phase switches with electric closing function are large in size and cannot be installed in the existing electric meter box t...

AI Technical Summary

Problems solved by technology

At present, most of the low-voltage three-phase switches (0.4kV) in the distribution network do not have the function of electric closing, and a small number of three-phase switches with electric closing function are large in size and cannot be installed in the existing electric meter box to realize cost control (prepaid electricity fee , when the electricity bill is over, the meter will control the control switch to jump open. After charging, the meter control switch will be closed. The current single-phase power supply users have realized the cost control, and the three-phase power supply customers have not realized the cost control. The main thing is stable and reliable The three-phase switch has not been developed), the price is expensive, the opening and closing of the switch requires coil energy storage, the coil will generate heat when it is energized for a long time, and the energy saving performance is not good

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