Micro Digital Servo Voltage Stabilizer 3 Phase Oil cooled

Parameter

Single Phase Unit

Three Phase Unit

Rating

2 KVA to 50 KVA

6 KVA to 2000 KVA

Input Voltage Range

a) 207V - 280V
b) 180V - 280V
c) 160V - 280V
d) 140V - 280V

a) 360V - 470V
b) 340V - 470V
c) 300V - 470V
d) 250V - 470V

Nominal Output Voltage

230V

400V

Output Voltage Accuracy

± 1%

± 1%

Line Frequency Variation

47Hz-53Hz

47Hz-53Hz

Effect of Power Factor

None

None

Wave Form Distortion

None added

None added

Control

Digital/Analogue

Digital/Analogue

Response Time

10 ms.

10 ms.

Voltage Correction Rate
Air Cooled
Oil Cooled

25V / Sec.
15V/ Sec

40V / Sec
25V / Sec.

LCD Display (20 x 2 matrix)

Date & Time, Input Voltage, Output Voltage & Current

Log Book Memory (Non-volatile)

No. of Hrs. of operation on mains.
Peak Current demand.
Nos. of Abnormal High Voltage cut-off events.
Nos. of Abnormal Low Voltage cut-off events.
No. of Hrs. of operation on DG.

Programmable Features(Through 2-parallel way resettable passwords)

HV cut-off set.
LV cut-off set.
O/L trip set.
Time delay set
Operating mode (auto/manual)

Cooling:
1. Air Cooled
2. Oil Cooled

2 KVA to 40 KVA & above
5 KVA to 1000 KVA & above

Efficiency

97%

Protection

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

Surge Protection

Class C Type Secondary Surge Protection