SCR Power Controllers |
| SCR19-H and SCR39-H |
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Zero Crossing or Phase-Angle Fired
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Diagnostic LED Indicators
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Single- or 3-Phase Load Switching
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Extends Heater Life -- Reduces Thermal Shock
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No Maintenance -- All Solid State Components
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Close Control of Low Mass Heaters
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Phase Angle with Soft Start for High Inrush Heaters
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No Relay Noise--Contact Arc Noise Eliminated
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Semiconductor I²T Fusing
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Optically Isolated 4 to 20 mA Control Signal Input
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Fan Cooled
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View related products - Controllers, Meters and Switching Devices
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The SCR19-H and SCR39-H Series power controllers are designed to proportion electric power to resistive loads only, such as ovens, furnaces, heat sealers, etc. The controllers consist of power semi-conductors (SCRs), properly sized heat sinks, trigger circuitry, and fuses supplied on panels for surface mounting. (Note: They are not designed to drive transformers or any inductive load.) The power controller accepts a 4 to 20 mAdc output from a temperature controller.
Zero Voltage Switched Models
The SCR19Z-H and SCR39Z-H
SCR power controllers are zero
crossover fired, high-power solid
state switched devices. Zero
crossover firing eliminates the RFI generation associated with
mechanical relays. With zero
crossover firing, the output appears
as bursts of full sine waves of line
voltage which provides excellent
regulation to the load.
Phase Angle Fired Models
The SCR19P-H and SCR39P-H
SCR phase-angle fired power
controllers turn on each SCR for a
controlled portion of a half-cycle of
the line voltage. The effective line
voltage is determined by the portion
of the line voltage delivered, which
is proportional to the input control
signal. Additionally, the voltage is
regulated as the line voltage
changes.
Dimensions mm (inches):
Note: When fuses are added to unit, add 83 mm (3.3") to height.
| Model No. |
Height |
Width |
Depth |
| SCR19Z-H |
222.25 (8.750) |
135.12 (5.320) |
370.84 (14.6) |
| SCR19P-H |
222.25 (8.750) |
135.12 (5.320) |
370.84 (14.60) |
| SCR39Z-H |
222.25 (8.750) |
287.02 (11.30) |
370.84 (14.60) |
| SCR39P-H |
222.25 (8.750) |
394.46 (15.530) |
370.84 (14.6) |
Specifications
Supply Voltage: 120 to 600 Vac
Frequency: 50 to 60 Hz
Current Rating: 125 to 250 A Input Control Signal Isolation: 2500 Vac
Transient Voltage Protection: Inherent built-in immunity
Ambient Temperature: 0 to 50°C (32 to 122°F)
Load: Resistive
SCR39Z-H: 1-phase, 2-leg control for 3-wire delta, 3-phase ungrounded wye
SCR19Z-H: 1-phase, 1-leg control
SCR39P-H: 3-phase, 3-leg half control for 3-wire delta or 3-phase ungrounded wye
SCR19P-H: 1-phase, 1-leg control
Diagnostic Indicators: Shorted or open SCR
Cooling: Fan cooled, requires 120 Vac control voltage
Note: To Order Phase-Firing Models, see Part Number Builder section below.
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† Price are shown in RMB.
Note: All phase-angle models come complete with 1 fuse per SCR line controlled, and operator’s manual. All zero-voltage models come complete with 1 fuse per SCR line controlled, and operator’s manual.
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Part Number Builder |
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Option Descriptions
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(1)
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Phase
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Select
1 for Single Phase
3 for 3 Phase
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(2)
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Method
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Select
P for Phase-Angle Firing Models
Z for Zero-Voltage Switching Models
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(3)
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Line Voltage
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Select
12 for 120 Vac (Single Phase Only)
20 for 208 Vac (Single Phase Only)
24 for 240 Vac (Single Phase Only)
48 for 480 Vac
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(4)
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Amp Ratings
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Select
125 for 125 Amps
200 for 200 Amps
250 for 250 Amps
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(5)
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Soft Start or Voltage Limit
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Select
Nothing(leave field blank) for Zero-Voltage Switching Models
-S9 for Soft start 9 seconds
-S15 for Soft start 15 seconds
-S30 for Soft start 30 seconds
-S60 for Soft start 60 seconds
-S120 for Soft start 120 seconds
-V for Voltage limit
-X for No soft start or voltage limit
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NOTE: All combinations may not be valid, check spec sheet for valid part numbers.
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