JU Series Single-Phase Thyristor Regulators
The JU series small and lightweight thyristor regulators for single-phase loads are characterized with high panel installation density. Two control systems, a phase control and a zero-cross control, are built in and can be changed by remote contacts signal.
Features
- Compact structure
Compact, lightweight and high panel installation density - Options
The options of heater disconnection alarm function and current limit function are available. - Phase control/zero-cross
control
The phase control and the zero-cross control are selectable. The running by the phase control at the initial stage and by the zero-cross control at the normal stage is possible. - Zero-cross control
With the delta-sigma modulation, which controls every 1 cycle, the fine control like the phase control is possible. - Setting unit (option)
Display of various parameters, voltage/current/ power and change of the feedback system are possible. - Various protections
functions built-in
The thyristor element is protected by fast-acting fuse melting for short-circuit of load, and by gate-off for over-current. For models with a cooling fan built-in, alarm is activated and output is stopped for heat sink overheat. - Self-diagnosis function
built-in
The self-diagnosis function is built in for operation abnormality, Thyristor element abnormality and power supply abnormality.
Specifications
Phase | Single-phase |
---|---|
Rated current | 10, 20, 30, 50, 75, 100, 150, 200, 250, 300, 400, 500A (to be specified) |
Rated voltage | 100, 110, 120, 200, 220, 240, 380, 400, 440VAC (to be specified) |
Rated frequency | 50/60Hz (automatic change) |
Allowable frequency fluctuation | ±2Hz of rated frequency (±1Hz for performance guarantee) |
Working temperature range | -10 to 55°C (0 to 50°C for performance guarantee) |
Input signal | Selectable on terminals of 4 to 20mADC (internal resistance 100 Ω), 1 to 5VDC (internal resistance 25k Ω), ON-OFF contact signal, and Resistance signal (10k Ω, manual) |
Output range | 0 to 98% of rated voltage |
Minimum load current | 0.5A or more (at 98% output of rated voltage) |
Applicable load | Resistive load, inductive load (primary side control of transformer, phase control only) |
Output control system | Phase control/zero-cross control (selectable depended on models) |
Over-current protection | Thyristor gate-off (120% or more of rated current, on built-in or external CT) |
Cooling system | Natural cooling for 150A or less of rated current Built-in cooling fan for 200A or more |
Other functions | Soft-start, soft-up/down (1 to 20 seconds), soft-start at power failure recovery |
Dimension | H150 x
W70 x D165mm (for 10A, 20A) H352 x W60 x D190mm (for 35A to 75A) H325 x W128 x D190mm (for 100A to 250A) H495 x W128 x D230mm (for 300A to 500A) |
Weight | About 2kg for 10A, 20A, about 3kg for 30 to 75A, about 7kg for 100 to 250A, about 12kg for 300 to 500A |