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What is the difference between contactor or relay?
PUBLISHER:Shanghai Moye Electric Co.,Ltd RELEASE TIME:2017/7/13
The contactor, is mainly used for a loop, through the large current (up to a few hundred to more than 1000 A); and the relay is used for the two loop only by small current (a few dozen A to A), to achieve a variety of control functions. For the difference between the two, Xiaobian will be introduced in detail:
1, the role is not the same: the primary role of the relay is signal detection, transmission, conversion or disposal, the circuit of its circuit is generally smaller, generally used in the control circuit, to control the weak signal.
The primary function of the contactor is to connect or disconnect the main circuit. The main circuit refers to whether a circuit is working or not by which the circuit is switched on as a sign. The concept of the main circuit corresponds to that of the control circuit. Generally, the main circuit is larger than the current through the control circuit.
Large capacity contactors usually have arcing shields. Contact capacity is generally not exceed 5A relay, relay contact capacity small generally only 1A or 2A, and the contact of the contactor capacity but also the smallest 9A contactor; there are three main contact (the main contacts are normally open contact) and several other to help contact.
The relay contact is generally not the main auxiliary; relay contact is sometimes arranged in pairs, which is normally open contact and normally closed contact together, and the contactor can be arranged in pairs; about specific relay, time relay, as with other equipment portfolio planning counter, pressure relay and so on, with additional function and no general contactor.
2. contact opening and closing: in addition, the contactor is used to turn on or off the larger power load, which is used in the main circuit, and the main contact may have a chain contact to indicate the opening and closing of the main contact.
The relay is generally used in the electrical control circuit, which is used to expand the contact capacity of micro or small relays to drive larger loads. If the contact of the relay can be used to connect or disconnect the coil of the contactor. General relays have more open and close contacts. Of course, relays can also perform some special functions, such as logical operations, through proper connection.
3. The above two are the same: they are controlled by the coil of electricity or no electricity to drive the opening and closing of contacts, in order to disconnect or switch on the circuit. Contact electrical appliance. The control circuit of the coil is electrically isolated from the electrical circuit of the contact address.
1, the role is not the same: the primary role of the relay is signal detection, transmission, conversion or disposal, the circuit of its circuit is generally smaller, generally used in the control circuit, to control the weak signal.
The primary function of the contactor is to connect or disconnect the main circuit. The main circuit refers to whether a circuit is working or not by which the circuit is switched on as a sign. The concept of the main circuit corresponds to that of the control circuit. Generally, the main circuit is larger than the current through the control circuit.
Large capacity contactors usually have arcing shields. Contact capacity is generally not exceed 5A relay, relay contact capacity small generally only 1A or 2A, and the contact of the contactor capacity but also the smallest 9A contactor; there are three main contact (the main contacts are normally open contact) and several other to help contact.
The relay contact is generally not the main auxiliary; relay contact is sometimes arranged in pairs, which is normally open contact and normally closed contact together, and the contactor can be arranged in pairs; about specific relay, time relay, as with other equipment portfolio planning counter, pressure relay and so on, with additional function and no general contactor.
2. contact opening and closing: in addition, the contactor is used to turn on or off the larger power load, which is used in the main circuit, and the main contact may have a chain contact to indicate the opening and closing of the main contact.
The relay is generally used in the electrical control circuit, which is used to expand the contact capacity of micro or small relays to drive larger loads. If the contact of the relay can be used to connect or disconnect the coil of the contactor. General relays have more open and close contacts. Of course, relays can also perform some special functions, such as logical operations, through proper connection.
3. The above two are the same: they are controlled by the coil of electricity or no electricity to drive the opening and closing of contacts, in order to disconnect or switch on the circuit. Contact electrical appliance. The control circuit of the coil is electrically isolated from the electrical circuit of the contact address.