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Automatic Voltage Regulator

Application
Although it is desirable to operate general electrical equipment
using a high-quality power source (a power source with no noise
and a stable sine waveform at the rated voltage), in actuality
the power source voltage is constantly fluctuating for a variety of
reasons and includes various kinds of noise.
The new automatic voltage regulator (AVR) developed by our
company supplies stable high-quality power by absorbing noise in
the power source voltage and automatically regulating voltage
surges or drops to provide a uniform voltage.
As a result, by using our AVR,operation of electrical equipment
will be maintained at peak conditions and service life will be
extended. Further, our AVR is extremely economical: it contributes
to energy conservation by reducing excess voltage, the AVR
itself is highly efficient due to the use of transformers, and it is
virtually maintenance-free.
With today's demands for energy conservation, we are sure that
our AVR will play an important role.

Features
Wide acceptable range of input voltage fluctuations
Within ±10%(for SD-1 and SD-3)or ±10%, -20% for
SD-1S and SD-3S.
Built-in safety circuit.
If the load is excessive or if the output voltage
fluctuates more than ±10% of the specified value.
Compact and lightweight
Its size is approximately 2/3 that of existing models
and weight is approximately 1/2(for three-phase
50KVA model).
Magnetic leakage is low
Since no reactor of anything is used,
magnetic leakage is virtually non-existent.
Highly efficient
High-efficiency transformer is used.
Transformer with built-in noise filter
SD models use our patented double-shielded
noise filter transformer to eliminate noise.
Great output waveform
Since distortion is less than 1%, distortion produced
by electrical equipment is virtually non-existent.
Low operating noise
Our AVR is extremely quiet because no reactor or
cooling fan is used (however, if the voltage for a
single-phase model exceeds 25KVA or the
voltage for a three-phase model exceeds 75KVA,
the fan will operate).
Maintenance-free
Our quiet AVR utilizes no moving parts.
Transformer from AVR can be easily cut out
AVR can be easily cut out of the circuit.
Quick switching response
Fluctuations due to changes in load are small
and the response to fluctuations in input
voltage is fast.
Detection by efficiency value
By using an efficiency value detection circuit in the
RMS/DC converter IC, accuracy can be maintained
without any effects from fluctuations in the input power.

Specifications

  "Model SD-1,3" "Model SD-1S,3S" Remarks
Number of phases Single phase or three phase  
Frequency 50 or 60Hz  
Rated input voltage "100, 200, or 400V" Can also be manufactured to other specifications.
Acceptable range of inputvoltage fluctuations ±10% "(±10%, -20%)"  
Rated output voltage "100, 200, or 400V" Can also be manufactured to other specifications.
Output voltage accuracy Within ±1.5% Within ±2%  
Load change range 0〜100%  
Waveform distortion Within 1%  
Efficiency Less than 15KVA:At least 90%
15KVA or more:At least 93%
30KVA or more:At least 95%
At rated input voltage and rated load.
Response time for changes in power source 50Hz-Less than 0.24s
60Hz-Less than 0.2s
 
Response time for changes in load 50Hz-Less than 0.12s
60Hz-Less than 0.1s
 
Temperature dependence According to JEC standards H-type insulation is used for transformer type.
Withstand voltage resistance According to JEC standards  
Color Standard 5Y7/1 Models with other specifications can also be made.

Download of PDF catalog

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