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technical article
Explosion-proof measures for safety instruments
2011-5-24 16:44:47

In the instrument 's documents, everyone may be familiar with instrument flameproofing, and the ambassador knows little about the specific principles. Intrinsically safe instruments are also called safety spark instruments . Its characteristics are that under normal and fault conditions, the sparks generated by circuits and systems and the temperature reached will not ignite explosive mixtures. The above is the specific introduction to the concept of flameproof type, and I will introduce it to you below. How to implement the intrinsically safe instrument explosion protection measures:

Its explosion protection is mainly achieved by the following measures:

1. The instrument circuit is composed of new integrated circuit components and so on. It works under a lower working voltage and a smaller working current;

2. Use a safety barrier to separate the circuits in hazardous and non-hazardous locations, and limit the energy transferred from non-hazardous locations to hazardous locations;

3. The connecting wires of the meter must not form excessively distributed inductance and capacitance to reduce the energy storage in the circuit.

The explosion-proof performance of intrinsically safe instruments is not achieved by external measures such as ventilation, inflation, oil filling, and flameproof, but by the circuit itself, and is therefore intrinsically safe. It can be applied to all dangerous places and all explosive gas and vapor mixtures. It can also be repaired and adjusted under the condition of electricity. but. It cannot be used alone. In order to exert the explosion-proof function, the intrinsically safe circuit must be formed together with the intrinsically safe equipment (safety cabinet) and external wiring.