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
SCRphase-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.
† All dollar amounts on this site are shown in US currency.
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.
Part Number Builder
Option Descriptions
(1)
Specify Phase
Select SCR19P for Single Phase SCR39P for 3 Phase
(2)
Specify Line Voltage
Select 12 for 120 Vac 20 for 208 Vac 24 for 240 Vac 48 for 480 Vac
(3)
Specify Current Load
Select 125 for 125 Amp 200 for 200 Amp 250 for 250 Amp
(4)
Specify Soft Start or Voltage Limit
Select 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
NOTE: All combinations may not be valid, check spec sheet for valid part numbers.
