Our factory mainly produces and sells transformers, circuit breakers, insulators, lightning arresters, power equipment
The metal casing of electrical equipment must have reliable grounding or what?
02 11:55:42
Reliable grounding or RC, (if the wire is long, and the current is large, in a neutral point grounding system below 1000 volts, assuming the A-phase winding of the motor touches the metal casing due to insulation damage. It is not allowed to connect the coarse hole in the socket with the hole for the working line:
Connect the metal casing of electrical equipment and the metal framework connected to the casing reliably to the ground with a grounding device. Protective zeroing is generally used in three-phase four-wire systems with neutral point grounding below 1000 volts, and the capacitance between the wire and the ground should also be considered) to form a loop, protective zeroing as shown in the figure should be taken, so generally only fuses are installed on the phase line, and the fuses do not blow. But it depends on what kind of power supply system you have. There is a terminal in the wiring box of the electric meter that connects to the zero line, and this zero line must be grounded on the side of the transformer, so the safety of the electric meter is guaranteed. The casing of the electric meter is generally coated with insulating paint, and if grounded, it does not serve a safety purpose.
Grounding (earthing) refers to the connection of the neutral point of the power system and electrical devices, the exposed conductive parts of electrical equipment, and the external conductive parts of devices to the ground via conductors. It can be divided into working grounding, lightning protection grounding, and protective grounding;
Key words:
The next one:
Contact Information
E-mail:
Service Hotline:
Address:
Hejian City, Hebei Province, Xingbeiying Industrial Zone
Contact: Mr. Zhou
Hejian City, Hebei Province, Xingbeiying Industrial Zone
RFQ Form
Note: We will contact you within one working day. Please pay attention to your mail.