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Safety device for preventing heavy current discharge of direct current electricity output

A technology of output equipment and safety devices, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the safety problems, dangers, and obstacles to the application of PHS base station DC remote power supply systems that cannot be restrained from pouring into the switch room, and achieve high performance Perfect, high reliability, compact and small effect

Inactive Publication Date: 2006-06-28
张飞然
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Problems solved by technology

3. The transmission must be a DC voltage suspended to the ground
[0009] To sum up, the problem of power instability in my country has promoted the application of the PHS base station DC remote power supply system, but the safety problem of being unable to restrain the strong current from being poured into the switch room has hindered the application of the PHS base station DC remote power supply system. The DC remote power supply system of the PHS base station in trial operation has formed many sources of danger

Method used

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  • Safety device for preventing heavy current discharge of direct current electricity output
  • Safety device for preventing heavy current discharge of direct current electricity output
  • Safety device for preventing heavy current discharge of direct current electricity output

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Embodiment Construction

[0021] Such as figure 1 As shown, the present invention is a safety device for direct current output equipment, which is mainly composed of rectifier diodes D1, D2, D3, D4, D5, voltage regulator diodes DZ1, DZ2, varistors DV1, DV2, photoelectric coupling tube IC, and It is composed of recovery fuses PTC1, PTC2 and alarm signal output terminal S.

[0022] The four rectifier diodes D1, D2, D3, and D4 constitute a rectifier bridge; two varistors DV1 and DV2 are bridged between the two output ends of the rectifier bridge, and the two output ends of the rectifier bridge are respectively connected in series with a recoverable fuse PTC1 , PTC2; Connect resistor R1, diode D5, Zener diode DZ1 and capacitor C1 between the circuit output terminals OUT+ and OUT-; the input terminal IC-a of the photocoupler IC is connected in parallel with resistor R2 and capacitor C1; the photocoupler One pole of the output terminal IC-b of the IC is grounded; the alarm signal output terminal S is connec...

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Abstract

This invention discloses a security device for a DC output device composed of commutation five diodes, two Zener diodes, two voltage-sensitive resistors, a photoelectric coupler tube, fuses capable of resuming and an alarm signal output end. Since this invention sets an alarm signal output end, LED and Zener diodes, when voltage of an abnormal supply enters into the output, the LED starts up alarm signals at site and the output of the signals outputs pulse current alarm signals alarming the filling.

Description

technical field [0001] The invention relates to an equipment power protection device, in particular to a safety device for direct current output equipment. The device can be used to prevent AC strong current from pouring into the DC output equipment through the DC transmission cable and has a certain lightning protection function. It can protect the personal safety of installation, operation and maintenance personnel and the safety of DC output equipment. Alarm security unit. Background technique [0002] In recent years, China Telecom's wireless local telephone network PHS (Little Smart) system has developed rapidly, especially in rural areas. With the extension of its coverage, the installation area of ​​PHS base stations is getting wider and wider. However, due to the defects of our country's existing mains network, such as excessive voltage fluctuations, frequent grid failures, frequent regional power outages, etc., the power supply of PHS base stations in the PHS syste...

Claims

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Application Information

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IPC IPC(8): H02H7/10
Inventor 张幼彬张飞然
Owner 张飞然
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