Split Phase Compensation Non-contact Switch

Split Phase compensation non-contact switch is a fast capacitive contactless switch that can be used to connect power capacitive loads to the power grid. It is designed for applications that require switchgear and control equipment. It can achieve a fast switching (up to 14%) step compensation system for pure capacitance or reactance.

 

Working principle:

Capacitive Non-contact Switch: Its control board precisely calculates the instantaneous grid voltage and the voltage across the capacitor. It triggers the thyristor to turn on or off at the exact moment when these two voltages are equal in instantaneous value and phase (the "zero-crossing" point).

When Switching ON: The voltage difference is zero, theoretically resulting in zero inrush current.

When Switching OFF: The current naturally turns off at zero-crossing, with no arcing.

Thus achieving smooth switching characterized by "No Inrush, No Arcing."

 

 

 

 

It is not a single component but rather a functional module or assembly, usually integrated from the following parts:

1. Core Switching Element: Anti-parallel connected thyristors (SCRs / Thyristors) or more advanced thyristor modules (such as TSC modules). This is key to being "non-contact" – conduction is triggered by a gate signal and natural turn-off occurs at current zero-crossing.

2. Synchronous Trigger Control Board:It monitors the phase of the grid voltage and current in real-time, ensuring precise triggering of the thyristors exactly at the moment of voltage and current zero-crossing to achieve "zero-crossing switching."

3. Protection Circuitry: Includes RC Snubber Circuits (to suppress surge voltage and current), Heat Sinks and Fans (for high-power applications), Fault Detection Circuits, etc.

4. Driver and Signal Isolation: Receives switching commands from the reactive power compensation controller (like the one mentioned earlier) and provides electrical isolation and signal amplification.

 

 

● Regulator input voltage: DC8-16V

● Load circuit: Rated voltage 400V 50Hz/60Hz

● Load capacity: three-phase 60kVar, Single phase 15kVar, Power consumption is approx 2Watt/Amp.

● Rated voltage: Un±10%

● Harmonic voltage THD: ≤5%

● Response speed:<20ms

● Continuous response speed:<40ms

 

 

Feature	Capacitive Non-contact Switch	Traditional AC Contactor (with current-limiting devices)
Switching Method	Semiconductor zero-crossing switch (Non-contact)	Electromagnetic mechanical (Contact-based)
Switching Speed	Extremely Fast (millisecond level)	Slow (100+ milliseconds)
Inrush Current	Virtually None	High (requires series reactors for suppression)
Arcing	None	Present
Mechanical Life	Extremely Long (Nearly infinite cycles)	Limited (hundreds of thousands of cycles)
Maintenance Needs	Low	High (requires contact replacement)
Cost	Higher	Lower
Primary Use	Dynamic compensation, frequent switching, high-demand scenarios	Static compensation, stable loads, cost-sensitive scenarios

 

 

Note: above parameters are the typical size for reference only,which can be customized according to customer requirement, we reserves the right to change the data.contact us

 

 

Jinneng electric technology has a mature and comprehensive quality management system,we have SQE,PQE,CQE.The raw material incoming quality control,IPQC,PQC,FQC,our quality team ensure product quality stability.

Meanwhile,annual product/process/system audit are all basing on the ISO9001 quality managment system.continues correction and improvement is our daily jobs.zero defect is our final goals.

 

 

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