The JS/JT series is small and lightweight thyristor regulators with built-in firing unit for high density of mounting on instrumentation panels.

• Wide selection from 10A to 1000A on both single-phase and three-phase load applications
• Two control systems of phase-angle firing system and zero-cross firing system
• 4 kinds of feedback type of voltage feedback, current feedback, power feedback and without feedback are available in accordance with the characteristics of heating element on the phase-angle firing system
• Two kinds of zero-cross firing system, conventional type and modulation type, are available for sensitive power control
• Protection functions including thyristor gate-off and rapid fuse are built-in.

Models

Control systems/Feedback systems	Single-phase			3-phase
	Power voltage 100V	Power voltage 200V	Power voltage 400V	Power voltage 100V	Power voltage 200V	Power voltage 400V
Phase-angle firing/Voltage feedback	JS-1V	JS-2V	JS-4V	JT-1V	JT-2V	JS-4V
Phase-angle firing/Current feedback	JS-1A	JS-2A	JS-4A	JT-1A	JT-2A	JS-4A
Phase-angle firing/Power feedback	JS-1W	JS-2W	JS-4W	JT-1W	JT-2W	JS-4W
Phase-angle firing/Without feedback	JS-1N	JS-2N	JS-4N	JT-1N	JT-2N	JS-4N
Zero-cross firing/Conventional type				JT-1Z	JT-2Z	JS-4Z
Zero-cross firing/modulation type	JS-1C	JS-2C	JS-4C

Rated current: The abovespecifies the rated current. (ex. 010 for 10A)
10A: 010, 20A: 020, 30A: 030, 50A: 050, 75A: 075, 100A: 100, 150A: 150, 200A: 200,250A: 250, 300A: 300, 400A: 400, 500A: 500, 750A: 750, 1000A: X00

Specifications

Rated voltage	100V/110V/120V, 200V/220V/240V, 380V/400V/440V AC (to be specified)
Frequency	50/60Hz (selected by terminal)
Rated current	14 kinds of 10A, 20A, 30A, 50A, 75A, 100A, 150A, 200A, 250A, 300A, 400A, 500A, 750A, and 1000A (Reference: Ambient temperature of 50°C)
Input signal	3 kinds of 4 to 20mADC, 1 to 5mADC, and ON-OFF contact signal (selected by terminal)
Input resistance	4 to 20mADC: less than 100, 1 to 5mADC: less than 400
Output range	Phase-angle firing system	Voltage feedback type: 0 to 98% (95%) of rated voltage Current feedback type: 0 to 100% of rated current Maximum voltage output: 98% (95%) of rated voltage Power feedback type: 0 to 98% (95%) of rated voltage x 0 to 100% of rated current Without feedback: 0 to 98% (95%) of rated voltage
	Zero-cross firing system	Conventional type: 0 to 100% of rated voltage, Frequency division cycle: 1.5 second modulation type: 0 to 100% of rated voltage The figures in ( ) indicate the output for 3-phase control.
Load applicable	Resistive load and inductive load (Primary side control of transformer) Resistive load only for frequency division control system
Allowable voltage fluctuation	85 to 110% of rated voltage
Operating temperature range	Performance guarantee range: 0 to 50°C Operation guarantee range: -50 to 50°C
Cooling system	Self-cooling (Rated current: Single-phase - less than 150A. 3-phase - less than 75A) By built-in cooling fan (Rated current: Single-phase - more than 200A. 3-phase - more than 100A)
Over current protection	Thyristor gate off Over current protection function is not available for phase control system without feedback, but the current transformer (CT) for detecting current is sold separately.
Alarm	Over current alarm (on mounting CT for detecting current), Rapid fuse melting (more than 30A) Cooling fan abnormal (Single-phase: more than 200A, 3-phase: more than 1150A): Contact output, lamp indication Load disconnection alarm ( modulation type only): Lamp indication
Accessories	Variable resistor (10k)for gradient setting or low limit setting Variable resistor (2k)for manual setting, high limit setting or for elevation Variable resistor (10k, 2k)for high limit setting and low limit setting Variable resistor (10k, 2k)for output indicator, gradient setting/manual setting and selection switch

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