How can there be training materials such as mine feeds or starters?

Mine explosion-proof feed switch, that is, mine flameproof vacuum feed switch; Explosion-proof electromagnetic starter, that is, explosion-proof electromagnetic starter, the difference between the two is as follows:

First, the structure is different.

Mine flameproof vacuum feed switch: the structure includes housing, box, vacuum circuit breaker, protector, power transformer, resistance and capacitance absorber, instrument panel and power transformer.

Explosion-proof electromagnetic starter: The structure includes flameproof shell, vacuum body, vacuum contactor, motor comprehensive protector, overvoltage absorption device, intermediate relay and fuse, etc.

Second, the role is different.

Mine flameproof vacuum feed switch: mainly used for the main switch and branch switch of the power supply system, or as the feed switch for the mine flameproof mobile substation, and can also be used for overload, short circuit, undervoltage and leakage protection.

Explosion-proof electromagnetic starter: It is mainly used to control the direct start, stop and forward and reverse operation of the three-phase squirrel cage induction motor, and can protect the overload and phase failure of the motor.

Third, the characteristics are different.

Mine flameproof vacuum feed switch: it has the characteristics of strong breaking capacity, fast analysis speed, simple electrical principle, complete protection function and display function.

Explosion-proof electromagnetic starter: It has the characteristics of high-voltage electrostatic spraying on the surface, beautiful appearance and various circuits can be freely assembled according to needs.

The mine explosion-proof feed switch is equivalent to the main switch, although there is some protection, but it cannot be operated frequently. The explosion-proof electromagnetic starter has a variety of protections, which can manipulate the motor, frequent action, start and stop the motor. Explosion-proof feeder switch, the protection current is large, generally short-circuit protection.

Explosion-proof electromagnetic starter, protection current according to the motor setting.

Hello, the feed switch is equivalent to the middle switch, the feed switch is connected to the front of the starter, if the feed switch is out of power, there is no power in the back,

Magnetic starter protection: overload, short circuit system.

Leakage lockout, phase failure, grounding, pilot self-starting, air leakage protection and other feed switch protection: overload, short circuit, leakage protection, phase failure, grounding, overvoltage, undervoltage and leakage lockout functions.

Mine flameproof distribution box protection: overload, short circuit, leakage protection, phase failure, grounding, overvoltage, undervoltage and phase unbalance protection.

Functions that should be possessed by starters and feed-in and protection products: three-stage current protection (overload, overcurrent, short circuit), leakage lockout, overvoltage and undervoltage, wind power lockout and tripping. Gas lock-up and tripping.

The feed and protection category should also have: leakage protection and selective leakage protection.

The feed switch is like the switch in the incoming box (distribution box) at home, which generally does not have a load closure and belongs to the power supply system. The starter is like a wall switch at home, and it should be closed with a load frequently. It's as simple as that.

Mining vacuum magnetic starters are suitable for frequent starting, mining vacuum feed switches are not suitable for frequent starting, and there are obvious disconnection points in the maintenance of mining vacuum feed switches, so they are often used together.

If the blocking container is disconnected in one phase, can the motor be started?

1. There is leakage protection for feeding, the starter only has leakage locking 2, the circuit breaker for feeding, and the contactor 3 for the starter, the feeding protection time is short, and the starter time is relatively long.

The protection requirements for electrical parameters are different, including leakage, overload, three-phase balancing, etc. Magnetic starters are required to have an isolated reversing switch.

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The high-voltage power distribution device is the high-voltage incoming line to this device, and then it comes out directly to the high-voltage equipment or to the transformer to change the voltage into low-voltage electricity and transmit it to the low-voltage electrical equipment.

Transformer As the name suggests, there is no need to explain this for transformer, and it is mentioned that the explosion-proof transformer used in the mine underground is the flameproof type, and the safety standard certificate needs to be handled.

The feed switch is equivalent to the isolation we usually use, of course, it is also a class 1 flameproof electromagnetic starter, which is equivalent to a circuit breaker, which is to isolate the electrical equipment at the lower end, as for **, it is not necessary to search a lot on the Internet, and there are many manufacturers, the main representative is some switch factories in the south and some explosion-proof factories in Shenyang, if you don't understand, you can add me extra points.

What you mentioned relates to three of the many categories of mining products::

1. Starter: divided into high-voltage electromagnetic starter and low-voltage electromagnetic starter 2, feed-in, protection: divided into high-voltage distribution device and low-voltage feed-in switch 3, transformer: dry-type transformer and mobile transformer.

As the name suggests, the starter class is a starter motor control machine, and his load is directly connected to the motor.

The feed protection class is the distribution line and control line, and there are three-stage current protection, leakage lockout protection and leakage protection.

Mobile transformers are high voltage (10kV or 6kV) to low voltage of or 380.

Generally, we call the high-voltage power distribution device a high-explosive switch, the low-voltage feeder switch is referred to as feed-in or low-voltage feed-in, and the mobile transformer is referred to as a shift.

The high-voltage electromagnetic starter is referred to as the high-voltage starter, and the low-voltage electromagnetic starter is referred to as the starter.

The electromagnetic starter is frequently started, only used as a starter, only with leakage locking, no leakage protection can only be used as a sub-switch, vacuum feed switch can not be started frequently, both leakage locking and leakage protection, can be separated, but also can be always open.

Electromagnetic starter billion coal products are suitable for coal mines with the danger of gas and coal dust, in the AC 50Hz, voltage below 1140V power supply system, as a long-distance control of the three-phase squirrel cage asynchronous motor starting, stopping or reversing control, YMJT01 is especially suitable for frequent operation, heavy load coal mining machinery and equipment.