Rittal cabinets – what electrical components are included in the electrical cabinet?

Create Date: 2024-8-30 12:03:23|Source: Rittal/Rittal

1 Circuit breaker

Low-voltage circuit breakers, also known as automatic air switches, can be switched on and off manually, and can be used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors. In the event of a severe overload, short circuit, or undervoltage fault, the circuit can be automatically shut down.

2 Contactors

The contactor is composed of electromagnetic mechanism and contact system, and the most common coil voltages are AC220V, AC380V and DC220V.

The contactor electromagnetic mechanism is composed of a coil, a moving iron core (connector) and a static iron core; The contactor contact system consists of a main contact, which is used to cut off the main circuit, and an auxiliary contact is used to control the circuit.

3 Thermal relays

A thermal relay is a relay that uses the principle of thermal effect generated by the passage of electric current through an element and operates in reverse time.

4 Intermediate relays

The principle of an intermediate relay is a relay that converts an input signal into multiple output signals or expands the signal (i.e., increases the contact capacity of the relay). It is essentially a voltage relay, but it has more contacts (up to 8 pairs) and 5 contacts with a capacity of -10A, and the action is sensitive.

When the number of contact pairs of other electrical appliances is insufficient, the number of contact pairs can be expanded with the help of intermediate relays, and the shock capacity can also be expanded through intermediate relays.

5 buttons

In practice, the buttons are usually selected according to the desired use and color. Commonly used LA18, LA19, LA20 series button series button series button C500V, DC440V, rated current 5A, A control power C300W, DC70W in the control loop.

Button color requirements:

(1) The stop button and emergency stop button must be red. When the red button is pressed, the device must stop operating or the power goes out.

(2) The color of the start button is green.

(3) The buttons for starting and stopping the alternating action must be black, white, or gray, and red and green buttons must not be used.

(4) The jog button must be black.

(5) The reset (if there is a reset button for the protective relay) must be blue, and when the reset button stops at the same time, it must be red.

6 Indicator light

The function of the indicator light:

(1) Indicates the running or stopping status of the equipment.

(2) Monitor whether the power supply of the control appliance is normal.

(3) Use the red light to monitor whether the tripping circuit is normal, and use the green light to monitor whether the closing circuit is normal.

7 Transfer Switch

The universal transfer switch consists of an operating mechanism, a panel, a handle and several contact holders.

When the handle is shifted to a different gear, the on-off status of each contact is indicated by a black dot, which indicates that the contact is closed, and no black dot indicates that the contact is open.

8 Travel switch

9 Schematic diagram of motor contactor and control mode
Rittal cabinets – what electrical components are included in the electrical cabinet?

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