Isolation Safety Barrier Manufacturer: Precautions for Using Isolation Safety Barriers
发布时间：
2022-07-27
The primary function of isolation safety barriers manufactured by isolation barrier producers is to limit the ingress of hazardous energy into safe areas—specifically, to restrict voltage and current from entering hazardous zones. Zener diodes are used to limit voltage: when the circuit voltage approaches the safety limit, the voltage across the diode is consistently kept below that limit. Next, let’s examine the precautions for using isolation safety barriers.
Isolation safety barrier manufacturers: The primary function of an isolating safety barrier is to limit the ingress of hazardous energy into a safe area, specifically by restricting voltage and current from entering hazardous locations.
A Zener diode is used to limit voltage. When the circuit voltage approaches the safe limit, the voltage across the diode is always kept below that limit.
Now, let’s take a look at the precautions for using isolation safety barriers.
Isolation safety barrier manufacturer shares precautions for using isolation safety barriers:
1. Isolation safety barriers shall be installed in non-hazardous locations.
2. The cross-sectional area of flexible copper conductors leading to the field (hazardous location) shall not be less than 0.5 mm².
3. The insulation strength of the connecting cable shall be no less than 500 V.
4. Do not misconnect or confuse the intrinsically safe terminal of the isolation safety barrier (marked in blue) with wiring for circuits outside the intrinsically safe zone. Blue is the preferred color for intrinsically safe markings. Intrinsically safe conductors and non-intrinsically safe conductors shall be routed in separate cable trays and protected by their respective conduit. On the intrinsically safe side of the isolation safety barrier, including the power supply for other intrinsically safe circuits, ensure that it is not mixed up with other power supplies.
5. When a intrinsically safe explosion-proof system is constructed using an isolating safety barrier and primary instruments, it must be inspected and approved by a nationally designated explosion-proof inspection agency. For the LU series isolating safety barriers, the distributed parameters Co and Lo provided by the National Explosion-Proof Electrical Equipment Supervision and Testing Center represent the maximum permissible values for Class C (hydrogen-class) environments; for Class B environments, these parameters may be multiplied by 3, and for Class A environments, they may be multiplied by 8. When using cables of different specifications for the transmission lines, the inherent cable parameters must be given close attention and must not exceed the specified limits.
6. When performing individual power-up adjustment of an isolated safety barrier, it is essential to pay attention to the barrier’s model, power supply polarity, voltage rating, and the labeling on the terminals of the barrier’s enclosure.
7. It is strictly prohibited to use a megohmmeter to test the insulation between the terminals of an isolation safety barrier. When checking the insulation of system wiring, internal equipment may be damaged; therefore, disconnect all wiring connected to the insulated safety barrier.
8. Field instruments connected to isolation safety barriers must be certified as explosion-proof by the relevant explosion-proof authority and bear an explosion-proof certificate.
9. In principle, any damage to internal modules of an isolated safety barrier that requires repair or replacement shall be borne by the manufacturer. If the customer undertakes the repair themselves, they must follow the relevant precautions and carry out the repair in accordance with the procedures outlined in the Maintenance section.
The foregoing are the precautions for using isolation safety barriers as outlined by the manufacturer. For more information, please feel free to contact us at any time!
Our company has many years of experience in the manufacturing and processing of isolated safety barriers, ensuring strict compliance with industry standards. If you have any questions, please feel free to contact us at any time—our dedicated customer service team will be happy to assist you. We look forward to welcoming you aboard.
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