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THYRISTOR MODULES FOR FAST POWER FACTOR CONTROL APPLICATIONS


ALPHA thyristor modules are designed for dynamic power factor correction applications which require extremely fast and frequent capacitor switching. The modules can switch capacitors up to 80 kVAr typically within 10ms of receiving a triggering signal. The microprocessor-based architecture and its algorithm sense the voltage-zero crossing and switches the capacitors at this instant, thereby avoiding capacitor abrasion. ALPHA modules show superior performance in PFC applications where standard contactor-based power factor control is not sufficient or fast enough. The advantages of the ALPHA series modules include:

Advantages of ALPHA series thyristor modules:

Thyristor Modules

Up to 480V, star-or delta-connected symmetrical or asymmetrical loads
Easy triggering from PFC relays or PLCs
Fast switching performance – typically below 10ms
Guaranteed transient free capacitor switching
Monitors voltage, status and temperature
Records detected faults, provides a dry contact output and displays faults on front panel
Can operate with or without a detuned filter reactor
Provides external thermostat connection which can be used to protect detuned filter reactors
Longer life expectancy
Maintenance free
Quiet operation

Application areas of ALPHA series thyristor modules:

ALPHA thyristor modules are designed for dynamic power factor correction applications requiring extremely fast and frequent switching actions. Applications include, but are not limited to:
Welding
Presses
Elevators
Cranes
Arc furnaces
Wind turbines
Gas stations
Commercial and industrial buildings