Three phase four wire air opening, where is the motor grounding wire connected, can it be connected

The grounding wire of the motor should be connected to the PE line of the protection neutral line of the power supply, and cannot be connected to the N place on the power supply side of the air switch, because the N line on the power supply side is the working zero line, not the protection zero line.

Motor Wiring Specification:

1) Motor wiring.

1: The insulation resistance value or absorption ratio should be measured on the stator coil of the AC motor before the motor is wired, and the insulation value of the low-voltage motor should not be less than 1 megaohm with a 1000V shake meter, and if it does not meet the requirements, it will be dried according to the actual situation.

2: The cable core connected with the low-voltage motor should be connected with the terminal lugs of the specifications, and be bolted with the motor lead-out wire, which should be firmly connected and the phase correct. At the bolt connection between the cable core and the motor lead-out wire, wrap it with self-adhesive tape first, and then wrap a layer of PVC tape on top of the self-adhesive tape after reaching a certain thickness.

3: When the cable enters the motor junction box, there should be a waterproof bend.

4: All motors should be reliably grounded, and share a common grounding system, with a grounding resistance of no more than 4 ohms.

2) Motor trial operation.

1: Before the motor starts, check whether the coupling is disconnected, and if it is really unable to be disconnected, it should be tested together with the mechanical part of the no-load after obtaining the consent of the factory.

2: When the motor is started for the first time, it should run for 2 hours under no-load conditions, record its no-load current and compare it with its factory technical data should not be significantly different, the motor has no abnormal sound, the temperature of each part of the motor should not exceed the provisions of the technical conditions of the product, the temperature of the sliding bearing should not exceed 80 degrees, and the bearing temperature of the rolling bearing should not exceed 95 degrees.

You can connect the input side of the empty open n terminal block or connect the reliable ground wire directly to the nearest one, but do not connect it to the open n output.

The ground wire of the three-phase four-wire motor without special requirements is used for protective grounding.

Although the air open n terminal is a neutral wire, it can be connected because the neutral wire and the ground wire in the three-phase four-wire system system are connected; There is no need to repeat the nearest reliable ground wire.

Due to the specification, the protective grounding wire is not allowed to have a switch node, so it cannot be connected to the open N output.

The empty N wire is the zero line, and any one of the three phase wires is composed of a 220 volt lighting power supply, which can not be connected, and the ground wire should be buried deep in the ground with a wire, and connected to the shell of the motor

No, it can be connected to the screws of the electrical box.

On the grounding screw of the motor, the three-phase four-wire is prepared for the lighting line, and the motor does not use the neutral line.

Standard connection: air switches are three wires, three-phase four-wire is also called power line, yellow, green, red or ABC phase, the three live wires are connected to the empty pile head on it, whether it is a distribution board or a distribution panel, a distribution box, there should be a grounding row and zero row, the zero line is directly connected to the zero row on the OK. It's useless to talk too complicated, it's easy to say in the idea, it's simple and clear, you can't try it casually in terms of power supply, as long as you master the correct wiring method of the electrician, you can't have the idea of trying it, it will be very dangerous to have this kind of idea!

Hello dear, I am happy to answer for you: how to wire the 6 wires of the 380V motor with two empty openings is as follows; Two empty open want to be used as 380, you can install the two side by side together, and then put the world file hand with hard things together, and also accompany him to close the two empty open at the same time. For the motor wiring of 6 wires, you can use a multimeter to distinguish the 6 wires, divide the two wires into one phase, and the 6 wires can be divided into three phases, and then judge the head and tail of the winding, the specific method:

Turn the DC milliampere of the multimeter to the lowest gear, and connect the meter pen to a certain group of two ends of the three-phase winding, and connect the positive and negative poles of the battery to the two wires of the other phase. When the switch is closed, if the swing direction of the watch hand is greater than zero, it means that the wire end connected to the negative pole of the battery is the same name as the wire end connected to the multimeter pen (both can be regarded as the head). By analogy, the head and tail of the other two phases can be measured.

Hello dear, happy to answer for you. No. In general, it is not recommended to connect the brigade rough lifting socket on the 4-wire air opening, because the air opening is mainly used to protect circuits and equipment, and the installation of the socket may affect the protection function of the air opening.

If you need to connect the socket to the existing circuit, you can add a socket box to the bench, connect the socket to the socket box, and then connect the socket box to the 4-wire empty open, which can connect the circuit and equipment more safely and reliably. However, in any case, it is important to ensure that electrical safety specifications are complied with before wiring and that it is carried out with the help of a professional electrician.