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CIRBRID
CIRBRID CIRBRID

Switches & Contactors

Thyristor Switching Modules

Technology : CIRBRID Thyristor Switching Modules are designed for fast, reliable, and contactless switching of capacitor banks in Automatic Power Factor Correction (APFC) systems. Ideal for dynamic loads and high-speed reactive power compensation.
Connection: 3 Phase

Standards:  IEC 60947-4-3 and IEC 61439 Designed as per CE, RoHS, and ISO certified.

Voltage Rating: Up to 690V AC (LV), MV variants on request

  • Switching Time: <20 ms (zero-crossing switching)
  • Control Input: 24V DC / 230V AC (Digital/Analog)
  • Trigger Logic: Zero-voltage or zero-current switching
  • Cooling: Natural or Forced air-cooled (heat sink)
  • Configuration: Three-phase Two Module / Three Module

Design Advantages

  • Fast & Precise Switching – Ideal for dynamic PFC
  • Modular Design – Easy expansion or maintenance
  • Low Maintenance – No moving parts
  • EMC Filter Compatible – Clean operation

OPTIONAL FEATURES

Over-temperature protection
Short circuit & overcurrent protection
No Mechanical Wear – Solid-state design
Silent Operation – No contactor noise

APPLICATONS

Works with Detuned Filters
Microsecond level Response
Improves System Stability & Reduces
Switching Response

Static Switches: Ddynamic Contactless Switch

Technology : Dynamic contactless switch is a kind of electronic power device module which can switch shunt power capacitor quickly, the electrical structure mainly composed of highpower anti parallel connected thyristor module, isolation circuit, trigger circuit, synchronous circuit protection circuit and drive circuit, It is also equipped with terminal blocks to control switch on or off, control logic voltage ov (cut-off), 12V (conduction). The switch has the characteristics of simple installation, convenient maintenance, fast response, no inrush current switching, stable and reliable operation without noise, phase loss protection, etc. It is an ideal device for switching capacitor bank in reactive power dynamic compensation device.
Connection: 3 Phase
Standards:  GB/T 29312-2012
  • Switching Medium : High power antiserial thyristor modules, driven by isolation and trigger circuits
  • Control Signal : Typically DC 12 V logic (on/off).
  • Switching Range : Can manage from a few kVAR up to 80 kVAR at 400 V or 60 kVAR at 230 V.
  • Cooling & Protection :Built-in temperature‑controlled fans and overheating safeguards
  • Built-in temperature‑controlled fans and overheating safeguards

OPTIONAL FEATURES

No noise or mechanical wear
Immediate and precise switching
Compact and modular
Reduced maintenance

APPLICATONS

Dynamic capacitor banks,
Reactive power compensation,
power factor correction in industries.
With Detuned Filters.
Flicker Mitigation

Composite Switch

Technology : composite switch uses thyristor switch and magnetic holding switch to run in parallel. It has the advantages of thyristor zero crossing switching at the moment of switching on and off, and has the advantages of zero power consumption of magnetic holding switch during normal switching on.
Connection: 3 Phase
Standards:  GB/T 29312-2012

Voltage Rating: Up to 690V AC (LV), MV variants on request

  • Built-in microprocessor and intelligent software, can intelligently control capacitor switching
  • The product achieves zero crossing switching, no arc, no inrush current,fast response
  • On-resistance is zero, no harmonics are generated
  • No switching inrush current, no current limiting reactor required,reducing the cost of the complete cabinet
  • Non-heating, can be installed in a closed box
  • Micro power consumption, less than 1% of contactor power consumption
  • Simple structure, easy installation and lower cost than thyristor switches
  • Low failure rate and much longer service life than thyristors and contactors

OPTIONAL FEATURES

No noise or mechanical wear
Immediate and precise switching
Compact and modular
Reduced maintenance
Extended operating temperature range

APPLICATONS

Dynamic capacitor banks,
Reactive power compensation,
power factor correction in industries.
With Detuned Filters.
Flicker Mitigation

Capacittor Duty Contactor

Technology :  CIRBRID Capacitor Duty Contactors are specially designed for reliable and efficient switching of power factor correction capacitors. Unlike standard contactors, these are equipped with pre-charge resistors to handle the high inrush current typically associated with capacitor bank switching, ensuring long life and operational stability.

Connection: 3 Phase
Standards:  IEC 60947-4-1 / IEC 60947-4-3

High Inrush Current Handling

  • Specifically designed to withstand high inrush currents (up to 180 times the rated current) caused by capacitor switching.

Pre-Charge Resistor System

  • Integrated pre-charge resistors reduce inrush current at the moment of capacitor energization, improving contactor life.

Arc Suppression System

  • Special arc chute design for safe disconnection and long electrical life under capacitive loads.

Long Mechanical & Electrical Life

  • Suitable for frequent switching with durable contact materials and robust mechanical design.

Compact & Modular Design

  • Easy to install in LV PFC panels, compatible with DIN rail mounting or base mounting options.
  • Reduced power consumption in holding mode enhances energy efficiency.

OPTIONAL FEATURES

Short circuit & overcurrent protection High

APPLICATONS

Works with Detuned Filters
Improves System Stability

MV Contactor

Technology : Three-phase vacuum interrupter contactor, designed for both inductive and capacitive loads
Connection: 3 Phase
Standards:  IEC 60947-4-1 / IEC 60947-4-3

Voltage Rating: Typically 3.3 kV to 6.6 kV, tailored for MV capacitor banks

Current Rating: Up to around 400 A

Switching Capability : Optimized for frequent operations.

OPTIONAL FEATURES

Arc-free switching
durable vacuum technology
compact size

APPLICATONS

MV capacitor banks,
reactive power compensation,
utility & industrial use

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