Category: Thyristor (SCR) Power Controllers

Dydac®offers wide range of Thyristor Power Controllers in DOUBLE PHASE.

Features

1. Soft start – bake out feature prevents moisture at start up.
2. Current Limit , Phase Loss Trip, Over temperature Trip.
3. Microprocessor Digital Programmable Thyristor Power Controller with Percentage Display. Program setting of Current Limit, Soft start etc by front keys.

Ratings

1. Double Phase – 25 , 34, 59, 70, 90, 150, 200 , 250, 300 Amperes

Dydac Controls Thyristor SCR Power Controllers | A sample of some typical applications:

•  Plastic Extruders , Plastic Injection Moulding machines
•  Thermoforming, textiles, industrial furnaces and ovens, extruders, kilns, chemical process heating, fast water heat.
•  Paper and pulp drying, packaging machines, pharmaceutical processes, infrared ovens and dryers.
•  High-temperature ovens and furnaces, kilns, glass, ceramics & high-temperature alloys.
•  Large tank heating and mechanical relay replacement.
•  High-speed paper and ink dryers, high temperature IR heating, high temperature materials processing.
•  Primary of transformer-coupled loads.
•  Phase angle proportional control. No temperature or power cycling
•  I2T Rectifier fuses standard
•  Isolated SCR’s
•  Integrated thermal/mechanical design saves panel space
•  Voltage protection – MOV capacitance
•  10 to 400 Ampere current ratings. Other Ratings Over 400 Amps Possible.
•  Easy to install, test, service

The Dydac Thyristor Power Controller is a heavy duty, fully Digital two phase power control unit for controlling the voltage applied to loads such as heating elements, thus, allowing temperature control while eliminating contactor switching and over/under heating. The first in a series of Digital ( SCR ) Power Controllers incorporating protection functions. Built in switching methods are:

1. Phase Control Firing2. Zero Crossing Firing

Range:

15 A – 400 A , 220-1200V,

Advantages at a glance

•  Fully digital Thyristor
•  Analog Thyristor
•  Phase Control and Zero Crossing
•  Current: 15 – 300 A (consult us when higher ratings are needed)
•  Voltage: 230- 500 V 50/60Hz
•  Cooling Method: Natural or Forced air
•  Ambient. Temp: 0 – 50°C
•  Continuous Duty
•  Two controlled phases
•  C.T.’s
•  Input, 4-20mA or 0-20mA, 0-10VDC
•  Digital display

Control Input: Analog (4-20mA/0-20mA/1-5V/0-5V)Indicating of analog signal.Automatic Output-limit cognition of external volume or internal limit setting.Various alarm mode(over current, line failed, over temperature, load unbalance)Fault alarm output / Run outputProgrammable soft start.True RMS current displayAuto/Manual mode operation is possible.Over current tripOutput Current Limit FunctionBuilt-in watch timerHeat-sink temperatureLoad unbalanced level is programmable Compact size

LEDs

• Over Current
• Over Temperature
• Alarm
• Trip

Connection types

• Double Phase

Protection functions

• Under & Over current
• Shorted SCR
• Heat sink over temperature Trip & Alarm
• Internal failure

The SCR control can deliver electrical power to heaters in several ways: phase angle fired, zero voltage switched and on/off control.Product can be changed or modified without Notice

Power Calculation

When selecting the correct sized SCR power controller, rate the SCR for at least 110% of the heater load. Heaters and power lines have tolerances that can swing on any given day or location.

Double PhaseWATTS÷ VOLTS= AMPS

Example: 18,000W ÷ 440V = 40.9 A

AMPS x VOLTS= Watts

Example: 40.9Ax 480V = 18,000W

AMPS x VOLTS x 1.73 = Watts

Example: 60A x 480V x 1.73 = 49,824

WExample: 18,000W ÷ 240V = 75A