Silver Tungsten Alloy Contactors Moudel US-N50 For Power Distribution
- Ref Price:
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- Loading Port:
- Shekou
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1 kg
- Supply Capability:
- 960 kg/month
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Specification
Contactors are divided into AC contactors (voltage AC) and DC contactors
(voltage DC), which are used in power, power distribution and power
consumption. Broadly speaking, contactor refers to an electrical appliance that
uses the current flowing through the coil to generate a magnetic field and
close the contact in order to control the load.
main features
The AC contactor uses the main contact to open and close the circuit and the
auxiliary contact to turn on the control circuit.
The main contact is generally normally open contact, while the auxiliary
contact often has two pairs of normally open contact and normally closed
contact. Small contactors are often used as intermediate relays to cooperate
with the main circuit.
The contact of AC contactor is made of silver tungsten alloy, which has good
conductivity and high temperature ablation resistance.
The power of AC contactor action comes from the magnetic field generated by AC
through the coil with iron core. The electromagnet core is composed of two
"mountain" shaped young silicon steel sheets. One of the fixed iron core is
sleeved with coil, and the working voltage can be selected. In order to
stabilize the magnetic force, a short-circuit ring is added to the suction
surface of the iron core. After the AC contactor loses power, it returns by
spring.
The other half is a movable iron core, whose structure is the same as that of a
fixed iron core, which is used to drive the closing and breaking of the main
contact and auxiliary contact.
Contactors above 20 amps are equipped with arc extinguishing cover, which can
quickly break the arc and protect the contact by using the electromagnetic
force generated when the circuit is disconnected.
The contactor can operate at high frequency. When it is used as the power on
and off control, the maximum operation frequency can reach 1200 times per hour.
The service life of contactors is very long. The mechanical life is usually
millions to 10 million times, and the electrical life is generally hundreds of
thousands to millions of times.
working principle
The working principle of the contactor is: when the contactor coil is
energized, the coil current will generate a magnetic field. The generated
magnetic field causes the static iron core to generate electromagnetic suction
to attract the moving iron core, and drives the AC contactor to act. The
normally closed contact is disconnected and the normally open contact is
closed. The two are linked. When the coil is powered off, the electromagnetic
suction disappears, and the armature is released under the action of the
release spring to restore the contact, open the normally open contact and close
the normally closed contact. The working principle of DC contactor is a little
similar to that of temperature switch.
- Q: About introduction type of contactor
- According to the main contact connection loop in the form of: straight Flow contactor, AC contactor
- Q: Judge the contactor is good or bad
- the amount of power to control the end of the line to remove the control, with a multimeter to beat the amount of foot, press the test end of the three main contacts and another group of normally open contacts, should be conductive
- Q: Permanent magnet AC contactor main performance?
- If any part is missing, the operating mechanism can not work normally under certain circumstances.
- Q: What are the principles of selection of contactors?
- When the rated current of the contactor main contact is selected, the rated current of the main contact shall be equal to the rated current of the load
- Q: Briefly describe the type of contactor
- the permanent magnetism and the spring force act together. In the process of stable operation, the permanent magnet suction is used instead of the previous electromagnetic attraction to keep the armature and the core.
- Q: Three-phase AC contactor has several terminals that have a role
- The power is applied and the contact point is disconnected after power failure
- Q: Three-phase AC contactors have several useful clients?
- . And note whether the contact point is normally closed or normally open. If there is self-locking control, according to the principle of the line on it.
- Q: What are the classification of contactors?
- arc time is relatively long, in order to fully release the circuit The remaining energy. The combustion of the arc produces high temperature and strong light, the surface of the contact has a serious ablation,
- Q: The difference between electromagnetic contactor and AC contactor
- C contactor is also a kind of electromagnetic contactor, because the AC contactor is the use of alternating current to let the coil produce magnetic field (magnetic flux), so that contactor to pull.
- Q: What is the difference between the auxiliary system 01 and 10 of the AC contactor?
- The so-called normally open contact is the contactor coil without electricity in the case of moving, static contact is separate, non-conductive, generally used NO said, normal open
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Silver Tungsten Alloy Contactors Moudel US-N50 For Power Distribution
- Ref Price:
-
- Loading Port:
- Shekou
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1 kg
- Supply Capability:
- 960 kg/month
OKorder Service Pledge
OKorder Financial Service
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