The difference between Eaton contactors and relays

The difference between Eaton contactors and relays:

1. The role is different: the primary role of the relay is for signal detection, transmission, conversion or disposal, and the circuit current it is on and off is generally small, and it is generally used in the control circuit to control weak signals.

The primary function of the contactor is to turn on or off the main circuit. The main circuit refers to whether a circuit works or not is marked by whether the circuit is turned on or not. The main circuit concept corresponds to the control circuit. Generally, the current passed through the main circuit is larger than that of the control circuit.

Contactors with large capacities are generally equipped with an arc extinguishing hood. The contact capacity of the relay generally does not exceed 5 A, the contact capacity of the small relay is generally only 1A or 2A, and the contact capacity of the contactor is 9A; The contactor contacts generally have three pairs of main contacts (the main contacts are all normally open contacts), and there are several pairs of auxiliary contacts.

The contacts of the relay are generally not divided into main and auxiliary; The contacts of the relay are sometimes set in pairs, that is, the normally open and normally closed contacts are combined, while the contactors are not set in pairs; Relays will be combined with other equipment for specific needs, such as time relays, counters, pressure relays, etc., which have additional functions, while contactors generally do not.

2. The opening and closing of the contacts are different:

In addition, the contactor is used to turn on or off the load with high power, and is used in the (power) main circuit, and the main contact can have interlocking contacts to indicate the opening and closing of the main contact. Relays are generally used in electrical control circuits to extend the contact capacity of miniature or small relays to drive larger loads.

For example, the contacts of the relay can be used to turn on or off the coil of the contactor. Generally, relays have more opening and closing contacts, of course, relays can also complete some special functions through appropriate connection, such as logical operations.

The function of relay: Relay is a kind of automatic electrical appliance, which is suitable for long-distance connection and disconnection of AC and DC small-capacity control circuits, and is used for control, protection and signal conversion in electric drive systems. The input amount of the control relay is usually the amount of electricity such as current and voltage, or it can be non-electric power such as temperature, pressure, speed, etc., and the output quantity is the electrical signal sent when the contact is operated or the parameter change of the output circuit. The characteristic of a relay is that when the change of its input quantity reaches a certain program, the output amount will change step by step.

The function of contactor: contactor is divided into AC contactor (voltage AC) and DC contactor (voltage DC), which is used in electricity, distribution and electricity occasions. Contactor in a broad sense refers to the electrical appliances that use the current flowing through the coil to generate a magnetic field and close the contact to control the load in industrial electricity.

The difference between Eaton contactors and relays

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