anti-electricity shaking time delay contactors

“electricity shaking” results and causes

"electricity shaking " just a few seconds, but it is a disaster for the company which a lot of equipment are not allowed motor trip in the continuous production, Business downtime is disastrous which lightly hundreds of thousands, tens of millions of economic losses, seriously fire, explosion and even personal safety. For the enterprise, it is really a disaster for a few seconds.

“electricity shaking ”-----during power system operation, due to lightning, shorted to ground, fault reclosing, automatic transfer system, ,enterprise external and internal grid fault, large-scale equipment started and other reasons, which caused grid failure and the voltage fluctuated widely moment or short interruption and recovery, this phenomenon is known as "electricity shaking ".

“electricity shaking ” leads to trip and stop reason

AC contactors are widely used in the low voltage motor control system, also with a large proportion. Due to electromagnetic contactor working principle, when the power grid occurs electricity shaking , the AC contactor working coil short outages, or voltage is too low, lead to dynamic and static core suction which rely on current to keep pull is less than releasing elasticity of spring, which is the important reason to occur trip and stop by contactors. Electromagnetic AC contactors working characteristics , international IEC standard rules that 80% of rated voltage is critical reliable pull-in voltage. Critical releasing voltage is 20-70% of rated voltage. Electromagnetic contactors are usually released in the 50% of normal voltage in the field using. So “electricity shaking ” leads to electromagnetic contactor trip and stop naturally without controlling because of that principles.

permanent magnetcontactor time delay working principle

When the control voltage suddenly drops to a non-normal operating voltage, under-voltage signal is transmitted to the permanent contactor controlling circuit, controlling system make analysis for signal immediately, which need time delay to prevent electricity shaking  occurs. the contactor keep its condition within the setting time delay, it will be disconnect over the setting time delay.

permanent magnetcontactor solve the electricity shaking  way

permanent magnet time delay contactor can replace the traditional electromagnetic contactor. Through improving the control modules of the existing permanent magnet contactor, increasing relevant logic analysis circuit, realize time delayed releasing, the release time can be arbitrarily set according to site requirements. 

For the phenomenon of loss of voltage grid (grid voltage fluctuate within a certain range), our company can customize low voltage time delay permanent magnet contactors, voltage and time can be set according to actual needs. For example: when voltage drops to 40% or 25% of rated voltage suddenly, time delayed 3 seconds releasing.

For the loss of electrical phenomena (voltage drops to zero suddenly), our company can customize power-off time delay permanent magnet contactor, the time can be set according to actual needs.

permanent magnet time delay contactor advantages:

Strong safety and reliability. permanent magnet contactor solve the "electricity shaking " by the product itself, not added any complicated control device accessories, plug-ins, to reduce the faults of control circuit, improve security and reliability.

Lower costs of replacement. The permanent magnet time delay contactor, set the logic analysis circuit to the original control modules to prevent “electricity shaking ” phenomenon effectively  there is no change in the volume of contactor and mounting dimensions. Therefore, the client does not need to increaseother electrical devices or change their installation way.

   Excellent quality, cost-effective. permanent magnet contactor production quality standard is conformity with international IEC standards strictly, in life assurance, on the basis of more than 1 million times,power saving up to 98%, fast reaction and no noise. So, not only to ensure the customers that the productionis running well, and also improve economic efficiency.

Power off time delay AC, DC contactors

Power off time delay AC, DC contactors will will stay closed within the scheduled time ever time when the power failure, the scheduled time is over, the working voltage can not recovery, the contactor will release immediately.

Contactor pull in characteristics rated voltage: 80% to 110%;

Contactor holding characteristics rated voltage: 0-110%;

Time delay is set: 0.3ms-10000ms (optionally), ± 0.5% error.

Intelligent voltage drop time delay AC, DC contactors

Intelligent voltage drop time delay AC, DC contactors are in the rated working voltage conditions, due to a variety of different conditions influence, the voltage drops to a certain voltage value suddenly, the contactor time delay control program started, it stay closed condition within the scheduled time range, when over the scheduled time, the voltage can’t recovery, the contactor will release immediately. The contactor is used as routine operating characteristics under the normal voltage condition, the time delay will not occur. the time delay is set 0.1ms -10000ms (optionally), ± 0.5% error.

Example: JNYC-3F / 2F (185A) -220V

Technical requirements:  the contactor delay 3 seconds releasing when the rated voltage drops suddenly to 30% of rated voltage.

According to the requirements that the intelligent time delay contactor delay releasing when rated voltage drops suddenly, regardless of any impact in any conditions, as long as the working voltage drops suddenly to 66V (±10%) the contactor starts the delay releasing function, when the scheduled time delay is over, the working voltage can’t recovery, the contactor will release immediately.

Contactor pull in characteristics rated voltage: 80% to 110%;

Contactor holding characteristics rated voltage: 30% to 110%;

Contactor release delay time: 3 seconds

Intelligent delay, quick-break permanent magnet AC, DC contactors

Intelligent delay, quick-break permanent magnet AC, DC contactors are in the rated working voltage condition, due to a variety of different conditions influence, the voltage drops, even loss of power, lead to contactor trip, it is not allowed power off in the actual working field, but it should be quick-break in the normal voltage working, so our company developed the intelligent time delay quick-break contactor, added a switch in the control circuit, in the contactor control circuit, A1, A2, S1, S2, A1, A2 for the rated working voltage terminal, S1, S2 is time delay quick break switch terminals. (Figure)

Time delay  is set to 0.3ms-10000ms (optionally), ± 0.5% error.