TECHNOLOGY

An SCR power switch differs from other switches in fast action. For example, while a contactor may cycle 3 times per minute, a Cristal Controls SCR may cycle approximately once per second. This fast SCR cycle time results in a final temperature much closer to the desired set point and reduces energy costs.

The SCR modulates small increments of power to the load, unlike traditional mechanical control, and eliminates the overshoot and undershoot associated with contactor's control.

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ZERO-CROSSING SCR Series

Cristal Controls Zero-cross Fired Power Controllers are ideal for the control of pure resistant loads that can accommodate fast, full power, ON-OFF cycling.

When coupled with a time proportioning control, they operate in a series of full ON-OFF cycles known as time proportioning burst firing. The time proportional control accepts the control output signal and converts it into a time proportional signal determining the amount ON and full OFF cycles produces a smooth power output to the load (heater) and stabilizes temperature.

How it works	Connections

• Duct heaters
• Electronic boilers
  
• Electric humidifiers
  
• Industrial & commercial ovens and furnaces
  
• Mine heaters
  
• Integrated circuit processing equipment
  
• Temperature control
  
• And electrical resistance
  
• Available options:
  • 3 legs power control on request
  • Semi conductor fuses
  • 120 Volt external power supply
  • Panel mounting on request

Advantages

• Modulate the power nearest to the demand and reduces energy costs and power consumption
• Keep the temperature closer to the desired set point for best comfort.
• Higher precision, superior than contactors.
• Fast adjustment and installation.
• Zero-crossing operation eliminates the thermal shocks overshoot and undershoot.
• Cycle once per second, very fast and quiet.
• No maintenance, due to less mechanical parts failure.
• Life expectancy higher than 1 000 000 000 operations.
• Do not create RFI (radio frequency interference) and will not adversely affect sensitive electronic equipment, logic controllers, computer, etc.) located in the same building or area.
  
• Epoxy thermally protected, for humidity, protection, overheat or contaminated environment
• Protected from line voltage transients, making them more reliable in a variety of applications

Specifications

• Accept multiple input signals: 0-135 Ohms, 0-10 Volts, 4-20 mA, 0-5 Volts.
• Security factory 2, I.E. 600 Volts surge protected and built for 1200 Volts.
• Up to 750 Amps at one or three phases
• CSA and US approved
• Opto-isolated from high voltage
  
• Also available for pneumatic controls, thermally protected
  
• Exclusive 2-year warranty.
  
• Available in 1 or 3 phases and a maximum of 600 Volts, the SCR can be placed inside a NEMA 1 control panel to suit any specific requirement, and more.

Zero-Crossing SCR 15 TO 90 Amps
Power Module	15 to 40A:	Type SCR
	50 and 90A:	Type Thyristors
Heat Sink	Type MS-15170
Voltage	15 AMPS	48 @ 347 VAC, 1 Phase and 48 @ 600 VAC, 3 Phases
	30 to 90A	48 @ 600 VAC, 1 or 3 Phases
External Power Supply	24 VAC (6 ma total for all models)
Modulating Control	Yes
Zero-Crossing	Yes
Opto-isolated	Yes
Option	Integral Overheat Protection

Zero-Crossing SCR 135 TO 250 Amps
Power Module	135 to 250A	Type Thyristors
Heat Sink	No 62905
Fan	150 cfm
Voltage	48 @ 600 VAC, 1 or 3 Phases
External Power Supply	24 VAC (6 ma total for all models)
Modulating Control	Yes
Zero-Crossing	Yes
Opto-isolated	Yes
Option	Integral Overheat Protection

Zero-Crossing SCR Nema-4 - 15 to 250 Amps
Difference between SCR and SCR NEMA4 NEMA-4 SCR are designed so the heat sink is completely outside the enclosure and all the electronic controls are located inside the enclosure.
Power Module	15 to 30A:	Type SCR
	50 and 250A:	Type Thyristors
Heat Sink	15 to 30A	Type MS-19921 and 66157-6
	50 to 250A	Type 66157
Voltage	15 AMPS	48 @ 347 VAC, 1 Phase and 48 @ 600 VAC, 3 Phases
	30 to 250A	48 @ 600 VAC, 1 or 3 Phases
External Power Supply	24 VAC (6 ma total for all models)
Modulating Control	Yes
Zero-Crossing	Yes
Opto-isolated	Yes
Option	Integral Overheat Protection (MIEC-4)

Zero-Crossing SCR - Models and Dimensions
CCS Model	Amps	Dimensions L" x H" x W" (without enclosure)	With Enclosure*
CCS-30-1	30	4-3/8 x 2-5/8 x 4-3/4	A
CCS-30-3	30	6-1/2 x 2-5/8 x 4-3/4	A
CCS-40-1	40	6 x 2-5/8 x 4-3/4	A
CCS-40-3	40	8 x 2-5/8 x 4-3/4	B
CCS-50-1	50	6 x 2-5/8 x 4-3/4	A
CCS-50-3	50	6 x 2-5/8 x 4-3/4	B
CCS-75-1	75	10 x 2-5/8.x 4-3/4	A
CCS-75-3	75	6 x 2-5/8 x 4-3/4	B
CCS-90-1	90	10 x 2-5/8 x 4-3/4	A
CCS-90-3	90	6 x 2-5/8 x 4-3/4	B
CCS-135-1	135	6 x 2-5/8 x 4-3/4	B
CCS-135-3	135	10 x 2-5/8 x 4-3/4	C
CCS-165-1	165	7-1/2 x 5-3/8 x 6-3/8	B
CCS-165-3	165	7-1/2 x 5-3/8 x 6-3/8	C
CCS-200-1	200	7-1/2 x 5-3/8 x 6-3/8	B
CCS-200-3	200	7-1/2 x 5-3/8 x 6-3/8	C
CCS-250-1	250	7-1/2 x 5-3/8 x 6-3/8	C
CCS-250-3	250	7-1/2 x 5-3/8 x 6-3/8	C
* Enclosure Type A: 12 x 12 x 8 * Enclosure Type B: 16 x 12 x 12 * Enclosure Type C: 20 x 18 x 12
Custom dimensions and Nema type on request

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PHASE ANGLE SCR Series

Cristal Control Phase Angle controls provide smooth proportional output from 0 to 100%.

They are designed to make available low cost high quality SCR phase control. This series offers variable voltage outputs for many applications.

We control load current from 15 amps to 750 amps at line voltage from 120 to 600 volt VAC.

A soft start (5 seconds) feature assures a slow rising output voltage to prevent saturation of inductive loads. The 5 seconds soft start is active on power up and is reset after a power loss. Custom programmation is available. Contact us for more information.

How it works	Connections

• Quartz Lamps
  
• Tungsten Lamps
  
• Wire Annealing
  
• Oven & Furnace Control
  
• Kantal elements

Phase Angle SCR 15 to 700 AMP
Power Module	Type Thyristors
Heat Sink	Type MS-15170
Voltage	208, 240, 277, 347, 480, 600 VAC, 3 phases (47 to 63 Hertz)
External Power Supply	24 VAC, 100 mA (5VA) on cold start, 40 ma (1 VA) when running
Signal	0-5 VDC, 0-10 VDC, 4-20 mA Has to be specified when ordering
Input tension	20 to 28 VAC (1 mA)