A Method for Realizing the Maximum Output Power of Intrinsically Safe Associated Equipment

Abstract

The invention relates to a method for achieving maximum output power of an intrinsic safety associated apparatus. When the intrinsic safety associated apparatus runs normally, output is carried out through a current-limiting resistor, when the voltage of the current-limiting resistor exceeds a preset value, a load is shown to be in normal connection, a quick shutdown circuit is closed, a major loop of the intrinsic safety associated apparatus does not carry out current limitation through the current-limiting resistor, power supply is carried out in a maximum output power mode, when a voltage change rate detection circuit detects that a voltage change signal of a sampling resistor reaches a preset threshold value, namely a circuit is in abnormal operation, the quick shutdown circuit is opened, and the current-limiting resistor can be used for current limitation of the circuit again. According to the design, the intrinsic safety associated apparatus can provide high-power power source output, when a load fault happens, the intrinsic safety associated apparatus can carry out rapid detection and can rapidly shut down a loop power source, ensure the fact that the load fault on site cannot ignite an explosive mixture, and achieve the self-recovery function of a protective circuit after the load fault is removed.

Description

technical field [0001] The invention relates to a method for realizing electrical safety equipment, in particular to a method for realizing the maximum output power of intrinsically safe related equipment. Background technique [0002] The electrical equipment used in explosive hazardous areas should be explosion-proof electrical equipment designed and approved according to the national explosion-proof standard GB3836 series. There are many protection methods for electrical equipment to realize the explosion-proof function, and these methods realize explosion-proof by limiting one of the three elements of explosion (ignition source, combustion aid, explosive substance). Common explosion-proof types (that is, protection methods) are two types: flameproof type and intrinsically safe type. Among them, the intrinsically safe type achieves explosion protection by limiting the ignition source among the three elements. [0003] For any explosive substance, there must be enough en...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problem that the safety electric energy supplied to electrical equipment is too low due to the existing energy-limited circuit, and proposes a method for realizing the maximum output power of intrinsically safe related equipment. In the interface device between the devices, a fault protection circuit is provided, which replaces the current limiting resistor of the associated device in the prior art, and realizes high power output

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