AC Voltage Regulator

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This Thyristorized Industrial AC Voltage regulator stack provides full seamless control of three-phase resistive loads. Signal control is by a DC signal. These burst firing control stacks use fast pulse zero volts switching technology to minimize flicker and eliminate RFI problems.

Salient Features

40% smaller than conventional designs
Electrically isolated heatsinks.
Easy mounting – Easy service access
Quick-change I²T fusing system
Completely self-contained – No separate control voltage is required for standard voltages
Accepts all standard control signals.
Tin-plated all copper bus bar.
Standard ratings designed for 50°C maximum ambient
Steeples control for proportional electric power
Voltage Range: 10 to 440 VAC
Current Range: 50 to 200 Amps AC
Control Mode: Phase Angle Firing/Burst Firing as per requirement
Integral Fusing: Three coordinated I2
T fuses for semiconductor protection
Reference Signal: 0-5V, 0-10 VDC, 10K Pot
Feedback signal 0-5 V OR 4-20mA
Shutdown Contact: Lockout (inhibits firing)
Transient Voltage Protection: RC snubber with MOV.
Soft Start: Inrush Protection
Optional Features: RMS Current Limit, RMS Voltage Regulation
Mounting: Panel Mountable (standard)
Soft start Feature
Single phase / Three phase input options as per customer’s requirement.
With Programmable Logic Controller - PLC (as optional)

Application

Suitable for 3-wire, 3-phase floating-star or closed-delta configured resistive loads. This includes the Heating, Ventilating and Air Conditioning (HVAC) market for air curtain applications, but also for furnaces, ovens, dryers and hot plates.
Temperature regulation is required in nearly every manufacturing process, typically for the purposes of material heating, melting, drying, or forming.
SCR power controllers, also called silicon-controlled rectifiers (SCRs), play a critical role in temperature regulation. Their primary use is to control the flow of electricity from the grid to a heater. This function regulates temperature to produce specific material effects or properties within an industrial furnace, oven, or other thermal processing equipment.
Compared to alternative devices, such as IGBT-based controllers, SCR power controllers provide much greater efficiency—up to 99.5%. SCR power controllers also replace contactors or relays due to the wear-free switching offered by thyristor devices. This characteristic greatly improves reliability and product longevity.

Function & Protection

Over temperature protection

When the sensor detects a heatsink temperature above 100ºC.

Over Current Protection

Fuses at AC input side provided. Fuse failure indicator with micro switch available (Optional)

Specifications

Power/(current ratings): 60 KW (105 A) & 180KW (250A) @ a typical supply of 415V RMS
Input voltage: 415 RMS +/- 10%
Frequency: 50/60Hz
Control input options: 0 to 10V dc (set as standard) / 0 to 5V using 10 K Potentiometer.
Operation modes: Selection by input enable or auto (Burst Fire and Phase Angle).
Control Signal Logic: 5-24 VDC ( Opto –isolated Inputs).
Soft Start: 0-30 Sec.
Load Option: Resistive or Inductive.
Cooling Fan: 230 VAC fitted as standard – other options available.
Working Temperature: 0 - 55°C
Dimension: 240 (L) x 230 (H) x 250 (W) for 60KW for other KW rating it will customized
Weight: 6.5 Kg approx.