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Electromechanical three-phase stabilizer
VST/3000 Family
Electromechanical three-phase stabilizer with independent regulators on each
phase + Neutral
Three phase electromechanical voltage stabilizers VST from 6kVA to 20 kVA
"VST" automatic three phase voltage stabilizers with electronic control and
INDEPENDENT VOLTAGE REGULATION ON EACH PHASE are essential for the use with any
unbalanced loads. The stabilizers use three control circuits and three
servo-motors; each phase is individually regulated, making the voltage
rigorously constant near the rated value. The "VST" stabilizers are ideal for
any application and very silent, totally free from magnetic leakage and do not
introduce harmonic distortion. Neutral wire is necessary for a proper
operation. "VST" stabilizers are equipped with an automatic 3-poles circuit
breaker, digital voltmeter with input and output voltage reading on each phase,
fine voltage regulation on each phase.
| Power |
from 6kVA to 30kVA |
| Input voltage |
400V three phase A.C. + N. |
|
Input voltage acceptable variation |
± 15% (from 340V to 460V) |
|
Output voltage |
400V three phase A.C. + N. |
|
Output voltage accuracy |
± 1% with independent regulation on each phase |
|
Fine voltage regulation |
± 5% on each phase separately |
|
Frequency |
50/60Hz |
|
Regulation speed |
20/1000 sec. / Volt |
|
Load tolerable variation |
0 - 100% |
|
Load acceptable unbalance |
0 - 100% |
|
Acceptable power factor |
0 - 1 |
|
Full load efficiency |
> 98% |
|
Harmonic distortion |
< 0,5% |
|
Ambient temperature |
0° : 45°C |
| Altidude |
up to 1000m. without derating |
|
Standards |
IEC 686 |
|
Cooling |
Air natural to 15 kVA
Forced cooling (fans) from 22 kVA to 30 kVA
|
|
Protections |
Automatic 4-poles circuit breaker
Digital V-meter with in/out reading switch and phase/phase or phase/N reading
on each phase
Fine output voltage regulation within ± 5% on each phase In/out connectors
|
| Power |
Part no. |
Dimensions (mm) |
DWG |
Weight |
| kVA |
A |
B |
C |
Kg |
| 6 |
VST06K |
600 |
300 |
800 |
A |
80 |
| 9 |
VST09K |
600 |
300 |
800 |
A |
85 |
| 12 |
VST12K |
600 |
300 |
800 |
A |
90 |
| 15 |
VST15K |
600 |
300 |
800 |
A |
97 |
| 22 |
VST22K |
600 |
300 |
800 |
A |
112 |
| 30 |
VST30K |
600 |
300 |
800 |
A |
125 |
Three phase electromechanical voltage stabilizers VST from 40kVA to 500 kVA
| Power |
Input |
Output |
Frequency |
Speed |
Accuracy |
| From 40KVA to 500KVA |
400V ± 15% |
400V |
50/60 Hz |
20 mSEC/V* |
± 1,5% |
| Our range of electromechanical three phase "VST" voltage stabilizers has been recently extended including five new models from 150kVA up to 500kVA supporting customers which required higher ratings with high levels of efficiency and accuracy. The regulation is independent for each single phase using toroidal voltage regulators of high power and fast regulation speed. "VST" has digital voltmeters with input and output voltage readings on each phase and A-meters on each phase. Protection is assured by an automatic circuit breaker on input up to 100kVA, while fuse protection, automatic circuit breaker or main circuit breaker are available on request for higher ratings. Input and output connections are possible on each side and from the bottom side through an internal board. |
 |
The electronic control which gives the regulation assures an output accuracy less than 1.5% with the option of regulating the voltage within the 5% of the nominal output voltage.
Manufactured according to IEC 60686 standards, it is not affected by power factor of load unbalance, and can be connected to a totally (100%) unbalanced load
|
| Power |
from 40kVA to 500kVA |
| Input voltage |
400V three phase A.C. + N. |
|
Input voltage acceptable variation |
± 15% (from 340V to 460V) different range available on request |
|
Output voltage |
400V three phase A.C. + N. |
|
Output voltage accuracy |
± 1% with independent regulation on each phase |
|
Fine voltage regulation |
± 5% separately on each phase up to 300 kVA |
|
Frequency |
50/60Hz |
|
Regulation speed |
20/1000 sec. / Volt |
|
Load tolerable variation |
from 0 to 100% |
|
Load acceptable unbalance |
0 - 100% |
|
Acceptable power factor |
0 - 1 |
|
Full load efficiency |
> 98% |
|
Harmonic distortion |
< 0,5% |
|
Ambient temperature |
0° : 45°C |
| Altidude |
up to 1000m. on sea level without derating |
|
Standards |
IEC 60686 |
|
Cooling |
Forced air
|
|
Protections |
4-poles magnetic circuit breaker (up to 100 kVA)
RFI filter as a protection of control circuit
Surge protection on electronic control
|
|
Standard accessories
|
Thermal-magnetic circuit breaker, digital voltage analyser with four displays with
simultaneous reading of values on the three phases, input/output voltage selector, output current,
power factor, frequency, internal temperature. Fine regulation of output stabilised voltage,
IN/OUT connectors sized to the rating.
|
| Power |
Part no.
|
Dimensions (mm) |
DWG |
Weight |
| kVA |
A |
B |
C |
Kg |
| 40 |
VST 040K |
600 |
400 |
1500 |
A |
250 |
| 50 |
VST 050K |
600 |
600 |
1500 |
A |
280 |
| 60 |
VST 060K |
600 |
600 |
1900 |
A |
315 |
| 80 |
VST 080K |
600 |
600 |
1900 |
A |
350 |
| 100 |
VST100K |
600 |
600 |
1900 |
A |
380 |
| 150 |
VST 150K |
1200 |
600 |
1900 |
B |
500 |
| 200 |
VST 200K |
1200 |
800 |
1900 |
B |
650 |
| 300 |
VST 300K |
1200 |
800 |
2100 |
B |
830 |
| 400 |
VST 400K |
2400 |
800 |
2100 |
C |
1000 |
| 500 |
VST 500K |
2400 |
800 |
2100 |
C |
1600 |
Technical sheet download in PDF
|
