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SCR Power Controllers
SCR19-H and SCR39-HPLACE ORDER
- Zero Crossing or Phase-Angle Fired
- Diagnostic LED Indicators
- Single- or 3-Phase Load Switching
- Extends Heater Life -- Reduces Thermal Shock
- No Maintenance -- All Solid State Components
- Close Control of Low Mass Heaters
- Phase Angle with Soft Start for High Inrush Heaters
- No Relay Noise--Contact Arc Noise Eliminated
- Semiconductor I²T Fusing
- Optically Isolated 4 to 20 mA Control Signal Input
- Fan Cooled
Description 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-HSCR power controllers are zerocrossover fired, high-power solidstate switched devices. Zerocrossover firing eliminates the RFI generation associated withmechanical relays. With zerocrossover firing, the output appearsas bursts of full sine waves of linevoltage which provides excellentregulation to the load.
Phase Angle Fired Models
The SCR19P-H and SCR39P-HSCR phase-angle fired powercontrollers turn on each SCR for acontrolled portion of a half-cycle ofthe line voltage. The effective linevoltage is determined by the portionof the line voltage delivered, whichis proportional to the input controlsignal. Additionally, the voltage isregulated as the line voltagechanges.
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)|
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)
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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