Oil Cooled Servo Voltage Stabilizers

Oil Cooled Servo Voltage Stabilizers

Oil Cooled Servo Voltage Stabilizers

The Oil Cooled Servo Stabilizers uses an advanced electronic servo-motor concept to control a motorized variable transformer. Output voltage accuracy is usually ± 1% with input voltage changes up to ± 50%. These machines are not affected unduly by power factor or frequency variation. This type of technology tends to be extremely effective when considering large three phase applications, as it is able to maintain its accuracy of all three phases, both line to line and line to neutral, irrespective of input voltage balance and load balance at any power factor. They are also able to withstand large inrush currents, normally experienced with inductive loads.

Technical Specifications :


S.No.
Parameter
Single Phase Unit
Three Phase Unit
1
Rating
2 KVA to 50 KVA
6 KVA to 2000 KVA
2
Input Voltage Range
a) 180V - 280V
b) 160V - 280V
c) 140V - 280V
a) 350V - 470V
b) 340V - 470V
c) 320V - 470V
d) 300V - 480V
e) 270V - 480V
f) 240V - 480V
3
Nominal Output Voltage
220/230V
400/415V
4
Output Voltage Accuracy
± 1%
± 1%
5
Line Frequency Variation
47Hz-53Hz .
47Hz-53Hz
6
Effect of Power Factor
None
None
7
Wave Form Distortion
None added
None added
8
Control
Digital/Analogue
Digital/ Analogue
9
Response Time
10 ms
10 ms
10
Voltage Correction Rate
1. Air Cooled
2 Oil Cooled
Up to 60V/ Sec.
Same
Up to 60V/ Sec.
Same
11
Display
  1. 1) Analog (Optional)
2) Digital (Microprocessor Based Technology)
 
12
Programmable Features(Through 2-parallel way resettable passwords)
  1. 1) HV cut-off set
  2. 2) LV cut-off set.
  3. 3) O/L trip set
  4. 4) Time delay set
5) Operating mode (auto/manual)
 
13
Cooling:
1. Air Cooled
2. Oil Cooled
  1. 1) 2 KVA to 100 KVA & above
2) 15 KVA to 2000 KVA & above
 
14
Efficiency
Better than 98%
 
15
Protection

Automatic Switch-Off against:
· Under / Over-Voltage
· Over-Load & Short - Circuit
· Single Phasing

(Other Option are also available)
 

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