TEMPCO Electric Heater Corporation
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SCR Power Control "D" Series  ― Three Phase 60 through 1200 Amp (2-Leg Zero Cross)

 
The "D" Series SCR Power Controls are two-leg zero cross SCR power controllers that linearly control, proportional to the command signal, the power applied to a 3 phase electrical load.
The Series "D" controller features a compact design, a single plug-in circuit card for ease of operation and an electrically isolated heat sink. All three leads are fused.
Design Features
 Hinged Cover for Easy Access to Components
 Back to Back SCR's
  Includes 3 Semiconductor I2T Fuses
  Line Voltage Compensation
 Diagnostic Indicators (Control Power, Command Signal, Blown Fuse)
 Fan Cooled on 90 Amp and higher units
 Transient Voltage Protection
 Voltage Squared Linearity
 Electrically Isolated Heat Sink
 Multi-turn Zero & Span Adjustments
 UL, cUL , Ce Compliant

Specifications
Command Signals: 4-20mA; 0-5VDC; 0-10VDC; potentiometer
Control Mode: Distributive Zero Cross
Load Current per Leg: 60, 90, 120, 180, 225, 350, 500, 650, 800 1000 or 1200 Amps
Line Voltage: 208, 240, 480, or 575 VAC; +10% to 20% 50/60 Hz
Zero and Span: Factory pre-set. User adjustable over a range of 20% of span.
Transient Voltage and dv/dt: 200 volts/microsecond minimum. Uses a dv/dt snubber and a metal oxide varistor (MOV).
Control Range: 0 to 99.5% of line voltage
Linearity: Average load voltage is linear within 2% of the command signal.		 temperature
  Operating: +32 to 122°F (0 to +50°C)
  Storage: 14 to +158°F (-10 to +70°C)
Cooling: 60A convection; All others fan cooled
Mounting: Panel mount with heat sink fins vertical

dimensions
60 through 225 Amp units:
12.5"H×16.25"W×9.25"D
350 through 500 Amp units:
19"H×20.125"W×8.5"D
650 amp units:
24"H×23"W×11.5"D
800 through 1200 amp units:
27"H×29"W×11.75"D

weight
60 through 225 Amp units: 31 lbs
350 through 500 Amp units: 41 lbs
650 amp units: 87 lbs
800 through 1200 amp units: 180 lbs
 
 
Common Configurations
240 VAC, 3-Phase, 2-leg; zero cross firing,
4-20 mA control input: Includes
Over Temperature Thermostat ― N.O. for
controls 90 Amp and over.
Load
 Current		 Part Number
Zero Cross
60 Amp SRT02101
90 Amp SRT02102
120 Amp SRT02103
Common Configurations
240 VAC, 3-Phase, 2-leg; zero cross firing,
4-20 mA control input: Includes
Over Temperature Thermostat ― N.O. for
controls 90 Amp and over.
Load
 Current		 Part Number
Zero Cross
180 Amp SRT02104
225 Amp SRT02105
350 Amp SRT02106

Potentiometer Kit (ordered separately): 5KW potentiometer and knob Part Number: SRS99001

How To Order