Method for achieving maximum output power of intrinsic safety associated apparatus

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 power output of an intrinsically safe associated equipment. Background technique [0002] 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 achieve explosion-proof functions. All of these methods achieve explosion-proof by limiting one of the three elements of explosion (ignition source, combustion-supporting substance, and explosive substance). Common explosion-proof types (ie, protection methods) are flameproof and intrinsically safe. Among them, the intrinsically safe type achieves explosion-proof by limiting the ignition source among the three elements. [0003] For any kind of explosive material, there must be enough energy to ...

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

Images