Fire-fighting equipment power supply having relay protection circuit

A technology for relay protection and fire protection equipment, applied in circuit devices, emergency power supply arrangements, electrical components, etc., can solve problems such as easy burnout, and achieve the effect of reducing costs

Pending Publication Date: 2018-03-23
BAIYI LIGHTING (SHANGHAI) HLDG LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a fire-fighting equipment power supply with a relay protection circuit to solve the problem that the existing fire-fighting equipment power supply uses a common relay and is easy to burn out when the output is short-circuited and the main and standby switches are switched over with a large current.

Method used

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  • Fire-fighting equipment power supply having relay protection circuit
  • Fire-fighting equipment power supply having relay protection circuit

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Embodiment Construction

[0023] figure 2 It is the power supply of the fire-fighting equipment including the relay protection circuit of the present invention. The fire equipment power supply with relay protection circuit uses a working circuit with relay protection circuit inside. The power supply of the fire fighting equipment includes an EMI filter and lightning protection circuit, a rectification and filter circuit, a power conversion circuit, a DC24V rectification and filter, and a main and standby power conversion circuit connected in sequence. The DC24V rectifier and filter is connected to the charging management circuit, and the main and backup power conversion circuit is connected to the relay protection circuit, and the relay protection circuit includes MCU and relay K1.

[0024] When the fire-fighting equipment power supply detects that the voltage of the AC power grid is disconnected, it is necessary to switch the main power supply of the fire-fighting equipment power supply to the backu...

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Abstract

A fire-fighting equipment power supply with a relay protection circuit, the fire-fighting equipment power supply includes an EMI filter lightning protection circuit, a rectification filter circuit, a power conversion circuit, a DC24V rectification filter and a main-standby power conversion circuit connected in sequence, and the DC24V rectification filter circuit is connected to a charging circuit. The management circuit, the main and standby power conversion circuit is connected to the relay protection circuit. The relay protection circuit includes MCU and relay K1. When the fire equipment power supply detects that the voltage of the AC grid is disconnected, it needs to switch the main power supply of the fire equipment power supply to the backup power supply. Under the control of the MCU, the relay K1 pulls in to connect the backup power to the output of the main and backup power conversion circuit. It is characterized in that a diode D2 is connected in series at the power supply end of the coil of the relay K1, and an electrolytic capacitor is connected in parallel at both ends of the coil of the relay K1. Capacitor C1.

Description

technical field [0001] The invention belongs to the technical field of fire-fighting equipment, in particular to a fire-fighting equipment power supply with a relay protection circuit. Background technique [0002] In the existing national standard GB 28184-2011 "Fire Equipment Power Supply Monitoring System", when it comes to AC grid voltage and backup power switching control, there are the following regulations: [0003] 4.2.1.3 Monitor power supply should be equipped with main power supply and backup power supply. When the fluctuation range of the AC power supply voltage is within the range of 85% to 110% of the rated voltage of 220V, the monitor should be able to work normally. [0004] 4.2.1.4 The power supply part of the monitor should have the function of converting main power supply and backup power supply. When the main power supply is disconnected, it can automatically switch to the backup power supply; when the main power supply is restored, it can automatically...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06
CPCH02J9/061
Inventor 谢文学
Owner BAIYI LIGHTING (SHANGHAI) HLDG LTD
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