Voltage Stabilizers

STOVOL STV-PRO Servo Voltage Stabilizer

Name: STOVOL STV-PRO Servo Voltage Stabilizer
Brand: STOVOL by Arab Tower

STOVOL STV-PRO servo-controlled voltage stabilizer — precise ±2% output regulation (adjustable to ±0.5%), 10–4000 kVA across a wide input range, supplied, installed and commissioned by Arab Tower across the UAE and internationally.

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Rating Range

10–4000 kVA

Output Accuracy

±2%

Regulation

Servo Drive

Technical Specification

Key Features & Capabilities

✓ — Servo motor driven — mechanically robust, proven correction
✓ — Independent 3-phase correction — zero cross-phase interference
✓ — DSP control with patented split-current voltage regulation
✓ — 7″ colour touch HMI — full monitoring, diagnostics & event logging
✓ — RS485 / Modbus RTU standard — SNMP, TCP/IP & IoT optional
✓ — Mechanical interlocked manual bypass — standard on all models
✓ — IP20 standard; IP44 / IP55 / IP65 outdoor enclosure optional
✓ — Tropical rated — 40°C ambient, Gulf-duty ready (derate to 60°C)
✓ — 100% load imbalance tolerance — handles fully unbalanced loads
✓ — Fully site-configurable — voltage, input range, IP class & enclosure

Specifications

Frequency	50 Hz standard · 60 Hz on request
Output Voltage	400 V L-L standard (380–415 V selectable)
Output Accuracy	±2% preset (adjustable ±0.5–5%)
Input Voltage Range	±20% standard (±15–40% selectable)
Correction Time	10% step → ±2% in <1.5 s
Correction Speed	≥20 V/s (servo motor drive)
Overload Capacity	150% / 10 s · 120% / 1 min
Efficiency	≥98% at rated load

Specifications

Model	kVA	Current (A)	IP
STV-PRO-010	10	14	IP20
STV-PRO-015	15	22	IP20
STV-PRO-020	20	29	IP20
STV-PRO-030	30	43	IP20
STV-PRO-045	45	65	IP20
STV-PRO-050	50	72	IP20
STV-PRO-100	100	144	IP20
STV-PRO-150	150	217	IP20
STV-PRO-200	200	289	IP20
STV-PRO-250	250	361	IP20
STV-PRO-315	315	455	IP20
STV-PRO-400	400	578	IP20
STV-PRO-500	500	722	IP20
STV-PRO-630	630	909	IP20
STV-PRO-800	800	1,155	IP20
STV-PRO-1000	1,000	1,443	IP20
STV-PRO-1250	1,250	1,804	IP20
STV-PRO-1600	1,600	2,309	IP20
STV-PRO-2000	2,000	2,887	IP20
STV-PRO-2500	2,500	3,608	IP20
STV-PRO-3150	3,150	4,546	IP20
STV-PRO-4000	4,000	5,774	IP20

Specifications

Frequency	50 Hz standard · 60 Hz on request
Output Voltage	400 V L-L standard (380–415 V selectable)
Output Accuracy	±2% preset (adjustable ±0.5–5%)
Input Voltage Range	±20% standard (±15–40% selectable)
Correction Time	10% step → ±2% in <1.5 s
Correction Speed	≥20 V/s (servo motor drive)
Overload Capacity	150% / 10 s · 120% / 1 min
Efficiency	≥98% at rated load

Specifications

Operating Temp	−20°C to +40°C (derate 2%/°C above 40°C)
Relative Humidity	95% RH non-condensing
Cooling Method	Forced air, thermostatically controlled
IP Rating	IP20 standard; IP44/55/65 optional
Insulation Class	Class H (180°C)
Altitude	1,000m ASL (derate 2.5%/500m above)
Noise Level	<55 dB(A)
Enclosure Finish	RAL 7032 standard (custom available)

Standards & Compliance

IEC 61558-1IEC 61558-2-14IEC 61000-6-2IEC 61000-6-4CE MarkedISO 9001:2015

STOVOL STV-PRO Servo Voltage Stabilizer

Key Features & Capabilities

Specifications

Specifications

Specifications

Specifications

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