Momentary power failure alarm

Abstract

The invention discloses an instantaneous power failure alarm, which is characterized in that it comprises: an AC contactor KM1, an audible and visual alarm B, and a power supply D that provides a DC working voltage for the aforesaid audible and visual alarm B, and the aforesaid audible and visual alarm B is connected to the power supply D, and the normally open contact KM1-1 of the AC contactor KM1 is connected in series on this line; a switch KF is also installed on the aforementioned line. The invention is beneficial in that it is simple to manufacture, low in cost, strong in stability, and easy to install; when it is detected that there is a momentary power failure in the power grid (the power supply is restored immediately after the momentary power failure, and the power failure time is ≥ 0.2 seconds), the battery The alarm that supplies power sends out a signal, and it will not stop alarming until someone comes to shut down (resume monitoring) or the battery power is exhausted, so that relevant personnel can find out the power failure in time, so that corresponding measures can be taken in time.

Description

Technical field [0001] The invention relates to an alarm, in particular to an instantaneous power failure alarm, and belongs to the technical field of power monitoring equipment. Background technique [0002] Due to the power supply line failure, the reclosing function in the protection device of the power supply unit can quickly close and restore the power supply after the instantaneous fault circuit breaker trips. Its action time is quite short. The staff on duty may not find that there has been a power outage, although it is a short power outage. However, some equipment that uses electricity will stop running. If there is no equipment operator during non-production hours, the equipment will always be in a disabled state, which will affect production or equipment. Summary of the invention [0003] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide an instantaneous power failure alarm which has strong stability, is easy to inst...

AI Technical Summary

Problems solved by technology

[0002] Due to the failure of the power supply line, the reclosing function in the protection device of the power supply unit can quickly close the switch to restore power supply after the instantaneous fault circuit breaker trips. However, some power-consuming equipment will stop running. If there is no equipment operator during non-production hours, the equipment will always be in a deactivated state, which will affect production or equipment.

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