The transformer terminal block is the part of the transformer that connects the wire. Its main component is a piece of metal sheet sealed in insulating plastic. There are holes at both ends for inserting wires, and screws for tightening or loosening.

The terminal block can be used to quickly and easily connect the wire to the electrical equipment. It has a certain crimping area to ensure reliable contact and sufficient current.

Due to different usage scenarios, the types of terminal blocks are also different. Common materials include: galvanized copper, silver-plated copper, copper, aluminum, iron, etc. They all play the following roles:

1. Beauty and standardization: Use terminal blocks to separate the inside and outside parts of the control circuit, so that the control circuit looks beautiful, neat and standardized.

2. Convenient installation: The corresponding line number is connected to the corresponding terminal block, which is convenient and fast

3. Convenient maintenance: You can directly use an ammeter to measure whether there is voltage on the corresponding limit terminal on the terminal block to quickly find out the fault. The number on the terminal number can be connected to the corresponding contact in the control circuit.

4. Convenient remote control: Wiring is done directly from the terminal block, so there is no need to change the original control circuit

Terminal block wiring specifications

In the wiring of the terminal block, we need to follow the specifications, which must be done in accordance with the "Electrical Installation Engineering Rotating Motor Construction and Acceptance Specifications", and meet the following requirements

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1. The terminal block should be intact, firmly fixed, and well insulated.

2. The terminals should have serial numbers, and the terminal block should be easy to replace and easy to wire: the height from the ground is greater than 350mm.

3. For circuit voltages exceeding 400V, the terminal board should have sufficient insulation and be painted with red marks.

4. Strong and weak current terminals should be arranged separately: when there are difficulties, there should be obvious signs and empty terminals should be set to separate or reinforced insulation partitions should be set.

5. The positive and negative power supplies, as well as the positive power supply that is often energized and the closing or tripping circuit should be separated by an empty terminal.

6. The current circuit should pass through the test terminal, and other circuits that need to be disconnected should pass through special terminals or test terminals, and the test terminals should have good contact.

7. Moisture-proof terminals should be used in humid environments.

8. The wiring terminals should match the wire cross-section, and small terminals should not be used with large-section wires.