Near-electricity alarm (electrical safety helmet protection knowledge)

Near-electricity alarm (device) The scope and principles of protection of electrical safety helmets: In addition to the above-mentioned general insulation protection functions, the alarm electrical safety helmet also has a contact or near-electricity warning function below 400 volts; in particular, it has more than 400 volts. Distance from outside the power of the early warning function. According to the national standards, T4 class electrical safety helmets cannot afford absolute protection for voltages above 400 volts. In particular, high-voltage electricity of more than 1 kV does not require contact and electric shocks such as electrical discharges may occur. Therefore, a power closet (electrical safety helmet) came into being, and it played a "close alarm" function. The main protection principle of the electrician's safety helmet is the “close alarm” warning function, not the contact insulation function.

Near-electricity alarm (device) The use of plastic safety helmet: Before use, the voltage selection switch is placed in the corresponding voltage file, then hold down the self-test, can issue a roar (voice) signal, you can use it normally. The 220 V-500 kV near-voltage range can be selected. When a person wearing a near-electricity alarm (electrician's safety helmet) enters a preset voltage range, a near-electrical automatic roaring alarm or a human voiced voice alarm is issued to prompt wearing. People should not be near charged objects to avoid electric shock.

The use of general electric alarm (electrical helmet): (1) 200-380 volt overhead power cable, alarm distance: 0.4m-0.6m; (2) 10kV overhead power cable, alarm distance: 0.8m -1.0 m; (3) 35 kV overhead power cable, alarm distance: 1.8 m - 2.0 m.

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