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Thyristor
Regulators
Thyristor
Regulators
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JU Series
Single-Phase Thyristor Regulators |
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 The
JU series small and lightweight thyristor regulators for
single-phase loads are characterized with high panel installation
density.
Two control systems, a phase-angle firing system and a
zero-cross firing system, 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-angle firing/zero-cross
firing
The phase-angle firing system and the zero-cross firing
system are selectable. The running by the phase-angle
firing system at the initial stage and by the zero-cross
firing system at the normal stage is possible.
- Zero-cross firing system
With the delta-sigma modulation, which controls every
1 cycle, the fine control like the phase-angle firing
system 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 melting of the
rapid fuse 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 abnormal
heat-sink temperature.
- Self-diagnosis function
built-in
The self-diagnosis function is built in for abnormal
operation, abnormal thyristor element and abnormal
power supply.
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Specifications
| Phase |
Single-phase |
| Rated
current |
10, 20,
30, 50, 75, 100, 150, 200, 250, 300, 400, 500, 750,
1000A (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 ),
1 to 5VDC (internal resistance 25k),
ON-OFF contact signal, and Resistance signal (10k,
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-angle firing system only) |
| Output
control system |
Phase-angle
firing/zero-cross firing (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)
H495 x W260 x D350mm (for 750A, 1000A) |
| Weight |
About
2kg for 10A, 20A, about 3kg for 30 to 75A, about
7kg for 100 to 250A, about 12kg for 300 to 500A,
about 35kg for 750A, 1000A |
*PDF data sheet is available at
"Download Center".
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