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Q Are you trading company or manufacturer?
A We are factory.
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Q Why should we choose your company?
A Certified company with CE certificates.
Advanced technical support and strict quality management system.
High-efficiency and timely service by E-mail, Whatsapp, Facebook, etc.
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Q How to check the sound of no action of the product?
A 1. Confirm whether the wiring of the contactors coil control loop is reliable.
2. Confirm whether the positive and negative poles of the coil are reversed.
3. For products with auxiliary switches, confirm whether there is a phenomenon that the coil is reversed from the lead wire of the auxiliary switch.
4. Confirm whether the output power of the power supply meets the driving power of the contactor coil.
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Q What are the causes of coil overheating or burning?
A 1. The power supply voltage is too high.
2. Poor coil manufacturing or due to mechanical damage, insulation damage, etc.
3.The ambient temperature is too high.
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Q ls the whole product series non-polarized?
A Yes.
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Q What is the difference between an epoxy contactor and a ceramic contactor?
A 1. The sealed material and process are different, the sealed material of epoxy is epoxy, and the production requires a baking process.
The sealed material of ceramic products is technical ceramics, and laser brazing is required for production.
2. The filing gas inside the product is different, the epoxy product is filled with nitrogen, and the ceramic product is filled with hydrogen.
3. The return signal function of ceramic products is unstable and unreliable.
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Q What can you do if the product is broken?
A Our product warranty period is one year from the date of goods acceptance. if the broken parts can't repair, we can send the new products to replace the broken parts, but you need to pay the express cost by yourself. if after the warranty period, we can through negotiation for solving the problems, and we supply the technical support for the whole life of the equipment.
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Q Can the contactor be installed upside down? What is the impact on its use?
A It can be installed upside down , no impact.
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Q What are the common failure modes of contactors? What are the possible causes?
A 
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Q What is the function of the microswitch/auxiliary switch?
A It is also called a mirror contact and is used to reflect the state of the main contacts, such as open or closed.
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Q What is the impact on the contactor at an altitude above 2000m?
A At an altitude above 2000m, the air becomes thinner and is more likely to be broken down. Therefore, the dielectric withstand voltage will decrease, and the electrical durability will also be reduced. More margins should be left. The requirements for electrical clearances above 2000m will increase. Please refer to the standard GBT16935.1 for details. This coefficient can be used as a coefficient for reducing the dielectric withstand voltage.
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Q Why does a contactor dropped from a tabletop become ineffective? What is the difference between the impact and vibration parameters in the instruction manual and those in this situation?
A Most DC contactors or relays are not designed to resist large impacts and vibrations. The impact received when a contactor drops from a tabletop to the ground is much greater than the impact and vibration parameters in the instruction manual, so it will cause the relay to become ineffective.
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Q Will the operating and release times of the same contactor change?
A Yes. Because of the microscopic changes in the position of the internal movable parts, as well as changes in external factors such as temperature and voltage, the time will change.
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Q If a freewheeling diode is connected in parallel to the control coil, will the operating and release times change? Why?
A The operating time will not change; the release time will become longer. Because when the coil is powered off, the coil will form a loop through the freewheeling diode, which reduces the rate at which the current in the coil decreases, thus making the release time longer.
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Q How will the operating and release voltages change when the ambient temperature rises? Why?
A According to the temperature coefficient of resistivity of copper wire (0.374%/℃), when the ambient temperature rises, the resistance value of the copper wire increases. When the voltage remains constant, the current passing through the coil decreases. However, the current required for the contactor to operate and release remains unchanged. Therefore, the corresponding operating and release voltages will increase. Conversely, when the ambient temperature decreases, the operating and release voltages also decrease.
