3RT2024-1AP00 Siemens 3RT2 Series Relay AC Contactor Power Contactor

Alibaba Web : https://shkautomation.en.alibaba.com

Description:

power contactor, AC-3e/AC-3, 12 A, 5.5 kW / 400 V, 3-pole, 230 V AC, 50 Hz, auxiliary contacts:

1 NO + 1 NC, screw terminal, size: S0.

1, the role of the AC contactor is to use the coil current to generate a magnetic field in industrial

electricity, so that the contact is closed to achieve the control of the load of the electrical equipment.

The composition of the AC contactor: The contactor is composed of two sections, and the upper

section is a thermosetting plastic shell. The auxiliary contact, the main contact and the arc extinguishing

device are fixed on the above; The lower section is a thermoplastic base on which the electromagnetic

system and buffering device are installed. The base has a screw holding hole, and the lower part also

has a latch for the IEC standard 35mm slot rail.

2, AC contactor is widely used as power switching and control circuit. Because the contactor is a kind of automatic switcher used to switch on or off the main AC/DC circuit or large capacity control circuit with

load, the main control object is the motor, in addition to other power loads, such as electric heaters,

welding machines, lighting equipment, contactors can not only switch on and off the circuit, but also

have a low voltage release protection /. Large contactor control capacity. Suitable for frequent operation

and remote control. It is one of the important components in automatic control system.

3, the AC contactor in the circuit plays the role of switching on or off the power switch, its working principle

is similar to the AC relay, but the number of electromagnetic switch structure and use occasions and

installation methods are different. Ac contactors are often used in electrical circuits with load rated

current greater than 10A and starting current greater than 60A. The AC contactor used in the central

air conditioning electrical system, the rated working voltage of the control coil is generally 220V, and

the coil current loop is connected with the relay contact. Through the contact is switched on or off, the

loop power supply is controlled to achieve the purpose of controlling the high-power electrical load.

4. The function of contactor is similar to that of knife switch. However, the contactor is not only able to

switch on and off the circuit, but also has undervoltage release protection, zero voltage protection,

large control capacity, and is used for frequent operation and remote control. Reliable work, long life.

Notes for different types of AC contactors:
1). Electric heating element load The wire-wound resistance element used in the electric heating element

load can be switched on at 1.4 times the rated current, such as for indoor heating, electric oven and

electric air conditioning and other equipment. If the network voltage is considered to increase by 10%,

the operating current of the resistance element will also increase accordingly.

2) Lighting device When the incandescent lamp load in the lighting device is switched on, there is a large

impulse current generated, about 15 times the rated current, if taking into account the allowable voltage

increase of 10%, the current will also increase accordingly.

Kindly Remind: