IVSI Series

Three-Phase Oil Immersed
Industrial AC Voltage Stabilisers
with Independent Phase Control

IVSI Series - Three Phase
Oil Immersed AC Voltage Stabilizers - 250 to 3000 kVA

IVSI Series Oil Immersed Voltage Stabilisers utilize Magnetic Induction Brushless Technology to deliver highly reliable and virtually maintenance-free voltage stabilisation and protection.

The oil immersion of the stabiliser considerably enhances the system’s cooling efficiencies and as a result delivers, in terms of physical size, a highly compact solution – especially when compared to alternative air-cooled models.

As standard, all IVSI Voltage Stabilisers offer independent phase control ensuring that each phase voltage remains stable, irrespective of load unbalance – even for situations where a 100% load unbalance may exist.

The Stabilisers can be supplied configured for either a Three Phase 4 Wire (With a Neutral) or 3 Wire (Without a Neutral) input supply.

Models are available in 13 different power ratings from 250 to 3000 kVA, being able to accommodate situations where the incoming nominal utility supply is either 380 to 415V (H/HD Series), 190 to 240V (LY/LD Series), or 440 to 480V (HX/HXD Series).

Where required, the Stabilisers can be provided as enhanced Power Conditioning solutions with the inclusion of an Isolation Transformer and/or with a standalone Main System Switchboard (MSB) – with interlocked input, output, and bypass breakers. In addition, on special request, IVSI Stabilisers and their associated switchboards can be supplied as fully standalone containerized power plant solutions.

To learn more about our range of  Three-Phase Oil-Immersed Industrial Voltage Stabilisers available from Ashley-Edison (UK), please check out the following listings, or download the brochure below:

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Standard Features include:

Automatic Voltage Regulation
Step-less automated voltage regulation – ideal for 95% of all applications.
Wide Range of Power Ratings
Three Phase 250 to 3000 KVA
Broad Permissible Input Voltage Swing Ranges
Input Swing – ±10% (S10), ±15% (S15), ±20% (S20), ±25% (S25), ±30% (S30), ±35% (S35) & ±40% (S40) – to specify.
High Efficiency
Better than 97% for low running costs.
Precise Output Voltage Regulation
Output Voltage Accuracy ±1.5%
Transient Voltage Surge Suppression
TVSS – Protects loads against harmful high-energy surges, transients, and spikes.
Independent Phase Control
Independent phase voltage sensing and control to ensure the individual phase voltages remain stable – regardless of load unbalance.
Inbuilt High Overload Capability
Ideal for loads with an inherent initial high current draw on startup.
Lightning Surge Protection
Protection against extremely high voltage surges and transients caused by lightning strikes on the supply line.
Over / Low Voltage Alarm
Audible alarm in the event of the input supply voltage going outside the input voltage window.
Phase Failure & Reversal Alarm
Audible alarm in the event of phase failure or reversal.
Voltage & Current Metering
Analog metering of output voltage and loading with phase selector switches.
Remote Operational Status Monitoring
No Volt Contacts delivering basic operational system status information for use by remote monitoring/building management systems.
Compliance with International Standards
Designed, manufactured, and supplied to comply with leading international standards.
Warranty
2 Years / 24 Months as Standard.


Optional Features
available include:

Power Conditioning (-PC)
Addition of a  shielded isolation transformer, to provide enhanced spike & electrical noise (Common Mode: 120db @ 100khz & Normal Mode Noise: 60db @ 100khz) suppression and neutral ground bonding. Delivers what is commonly referred to as a  ‘CLEAN’ supply.
Optional Main Switchboard (-MSB)
Floor Standing Main Switchboard with Input & Output Circuit Breakers, Manual Maintenance Bypass, and Metering.
Earth Leakage Relay (-ELCB)
Disconnection of the Power in the event of an earth leakage.
ISO Containerisation (-ISO)
Stabilizer (and MSB Switchboard) housed in an ISO Container.

SELECT | Permissible Input Voltage Window Options (S*):

Swing OptionsNominal VoltageMax Model Rating
380/220V400/230V415/240V
S10±10%342 to 418V / 198 to 242V360 to 440V / 207 to 253V374 to 457V / 216 to 264V3000 kVA
S15±15%323 to 437V / 187 to 253V340 to 460V / 196 to 265V353 to 477V / 204 to 276V3000 kVA
S20±20%304 to 458V / 176 to 264V320 to 480V / 184 to 276V332 to 498V / 192 to 288V3000 kVA
S25±25%285 to 475V / 165 to 275V300 to 500V / 173 to 288V311 to 519V / 180 to 300V3000 kVA
S30±30%266 to 494V / 154 to 286V280 to 520V / 161 to 299V291 to 540V / 168 to 312V3000 kVA
S35±35%247 to 513V / 143 to 297V260 to 540V / 150 to 311V270 to 560V / 156 to 329V3000 kVA
S40±40%228 to 532V / 132 to 308V240 to 560V / 136 to 322V249 to 581V / 144 to 3363000 kVA

SELECT | Required Power Rating:

Power Rating (kVA)Max Rating (Amps per Phase)IVSI Model No
(S*=Add Swing Option No)
380/220V400/230V415/240V
250 kVA379A360A347AIVSI-250H-3P-S*
300 kVA455A432A417AIVSI-300H-3P-S*
350 kVA531A505A486AIVSI-350H-3P-S*
400 kVA607A577A556AIVSI-400H-3P-S*
500 kVA759A721A695AIVSI-500H-3P-S*
600 kVA911A865A834AIVSI-600H-3P-S*
750 kVA1139A1082A1043AIVSI-750H-3P-S*
1000 kVA1518A1443A1390AIVSI-1000H-3P-S*
1250 kVA1898A1803A1738AIVSI-1250H-3P-S*
1500 kVA2278A2164A2086AIVSI-1500H-3P-S*
2000 kVA3037A2885A2781AIVSI-2000H-3P-S*
2500 kVA3797A3607A3447AIVSI-2500H-3P-S*
3000 kVA4556A4328A4172AIVSI-3000H-3P-S*

Note: All IVSI Stabilisers are designed to support the full load at minimum input volts and maximum ambient temperature.

SELECT | Permissible Input Voltage Window Options (S*):

Swing OptionsNominal VoltageMax Model Rating
190/110V200/115V208/120V220/127V
S10±10%171 to 209V / 99 to 121V1870 to 220V / 104 to 126V187 to 228V / 108 to 132V198 to 242V / 114 to 139V1500 kVA
S15±15%162 to 219V / 94 to 127V170 to 230V / 98 to 132V177 to 239V / 102 to 138V187 to 253V / 106 to 146V1500 kVA
S20±20%152 to 228V / 88 to 132V160 to 240V / 92 to 138V166 to 250V / 96 to 144V176 to 264V / 102 to 152V1500 kVA
S25±25%143 to 238V / 83 to 138V150 to 250V / 86 to 144V156 to 260V / 90 to 150V165 to 275V / 95 to 159V1500 kVA
S30±30%133 to 247V / 77 to 143V140 to 260V / 81 to 150V146 to 270V / 84 to 156V154 to 286V / 89 to 165V1500 kVA
S35±35%124 to 256V / 72 to 148V130 to 270V / 75 to 155V136 to 280V / 78 to 162V143 to 297V / 83 to 171V1500 kVA
S40±40%114 to 266V / 66 to 154V120 to 280V / 69 to 161V125 to 291V / 72 to 168V132 to 308V / 77 to 1771500 kVA

SELECT | Required Power Rating:

Power Rating (kVA)Max Rating (Amps per Phase)IVSI Model No
(S*=Add Swing Option No)
190/110V200/115V208/120V220/127V
250 kVA759A721A693A655AIVSI-250LY-3P-S*
300 kVA911A865A832A787AIVSI-300LY-3P-S*
350 kVA1063A1010A971A918AIVSI-350LY-3P-S*
400 kVA1215A1154A1110A1049AIVSI-400LY-3P-S*
500 kVA1518A1443A1387A1311AIVSI-500LY-3P-S*
600 kVA1822A1731A1665A1574AIVSI-600LY-3P-S*
750 kVA2278A2164A2081A1967AIVSI-750LY-3P-S*
1000 kVA3037A2885A2774A2623AIVSI-1000LY-3P-S*
1250 kVA3797A3607A3468A3279AIVSI-1250LY-3P-S*
1500 kVA4556A4328A4162A3935AIVSI-1500LY-3P-S*

Note: All IVSI Stabilisers are designed to support the full load at minimum input volts and maximum ambient temperature.

SELECT | Permissible Input Voltage Window Options (S*):

Swing OptionsNominal VoltageMax Model Rating
440/256V460/265V480/277V
S10±10%396 to 484V / 229 to 279V414 to 506V / 249 to 305V432 to 528V / 249 to 305V3000 kVA
S15±15%374 to 506V / 216 to 292V391 to 529V / 225 to 305V408 to 552V / 235 to 319V3000 kVA
S20±20%352 to 528V / 203 to 305V368 to 552V / 212 to 318V384 to 576V / 222 to 332V3000 kVA
S25±25%330 to 550V / 191 to 318V345 to 575V / 199 to 331V360 to 600V / 208 to 346V3000 kVA
S30±30%308 to 572V / 178 to 330V322 to 598V / 186 to 345V336 to 624V / 194 to 360V3000 kVA
S35±35%286 to 594V / 165 to 343V299 to 621V / 172 to 358V312 to 648V / 180 to 374V3000 kVA
S40±40%264 to 616V / 152 to 356V276 to 644V / 159 to 371V286 to 672V / 166 to 388V3000 kVA

SELECT | Required Power Rating:

Power Rating (kVA)Max Rating (Amps per Phase)IVSI Model No
(S*=Add Swing Option No)
440/256V460/265V480/277V
250 kVA327A313A300AIVSI-250HX-3P-S*
300 kVA393A376A360AIVSI-300HX-3P-S*
350 kVA459A439A420AIVSI-350HX-3P-S*
400 kVA524A501A481AIVSI-400HX-3P-S*
500 kVA655A627A601AIVSI-500HX-3P-S*
600 kVA787A752A721AIVSI-600HX-3P-S*
750 kVA983A941A901AIVSI-750HX-3P-S*
1000 kVA1311A1254A1202AIVSI-1000HX-3P-S*
1250 kVA1639A1568A1503AIVSI-1250HX-3P-S*
1500 kVA1967A1882A1803AIVSI-1500HX-3P-S*
2000 kVA2623A2509A2404AIVSI-2000HX-3P-S*
2500 kVA3279A3136A3006AIVSI-2500HX-3P-S*
3000 kVA3935A3764A3607AIVSI-3000HX-3P-S*

Note: All IVSI Stabilisers are designed to support the full load at minimum input volts and maximum ambient temperature.

SELECT | Permissible Input Voltage Window Options (S*):

Swing OptionsNominal VoltageMax Model Rating
380V400V415V
S10±10%342 to 418V360 to 440V374 to 457V3000 kVA
S15±15%323 to 437V340 to 460V353 to 477V3000 kVA
S20±20%304 to 458V320 to 480V332 to 498V3000 kVA
S25±25%285 to 475V300 to 500V311 to 519V3000 kVA
S30±30%266 to 494V280 to 520V291 to 540V1500 kVA
S35±35%247 to 513V260 to 540V270 to 560V1500 kVA
S40±40%228 to 532V240 to 560V249 to 581V1500 kVA

SELECT | Required Power Rating:

Power Rating (kVA)Max Rating (Amps per Phase)IVSI Model No
(S*=Add Swing Option No)
380V400V415V
250 kVA379A360A347AIVSI-250HD-3P-S*
300 kVA455A432A417AIVSI-300HD-3P-S*
350 kVA531A505A486AIVSI-350HD-3P-S*
400 kVA607A577A556AIVSI-400HD-3P-S*
500 kVA759A721A695AIVSI-500HD-3P-S*
600 kVA911A865A834AIVSI-600HD-3P-S*
750 kVA1139A1082A1043AIVSI-750HD-3P-S*
1000 kVA1518A1443A1390AIVSI-1000HD-3P-S*
1250 kVA1898A1803A1738AIVSI-1250HD-3P-S*
1500 kVA2278A2164A2086AIVSI-1500HD-3P-S*
2000 kVA3037A2885A2781AIVSI-2000HD-3P-S*
2500 kVA3797A3607A3447AIVSI-2500HD-3P-S*
3000 kVA4556A4328A4172AIVSI-3000HD-3P-S*

Note: All IVSI Stabilisers are designed to support the full load at minimum input volts and maximum ambient temperature.

Models (HDY Series) are also available offering a 4 Wire with Neutral Output.

SELECT | Permissible Input Voltage Window Options (S*):

Swing OptionsNominal Voltage
Max Model Rating
190V200V208V220V240V
S10±10%171 to 209V1870 to 220V187 to 228V198 to 242V216 to 264V1500 kVA
S15±15%162 to 219V170 to 230V177 to 239V187 to 253V204 to 276V1500 kVA
S20±20%152 to 228V160 to 240V166 to 250V176 to 264V192 to 288V1500 kVA
S25±25%143 to 238V150 to 250V156 to 260V165 to 275V180 to 300V1500 kVA
S30±30%133 to 247V140 to 260V146 to 270V154 to 286V168 to 312V1500 kVA
S35±35%124 to 256V130 to 270V136 to 280V143 to 297V156 to 329V1500 kVA
S40±40%114 to 266V120 to 280V125 to 291V132 to 308V144 to 336V1500 kVA

SELECT | Required Power Rating:

Power Rating (kVA)Max Rating (Amps per Phase)
IVSI Model No
(S*=Add Swing Option No)
190V200V208V220V240V
250 kVA759A721A693A655A601AIVSI-250LD-3P-S*
300 kVA911A865A832A787A721AIVSI-300LD-3P-S*
350 kVA1063A1010A971A918A841AIVSI-350LD-3P-S*
400 kVA1215A1154A1110A1049A962AIVSI-400LD-3P-S*
500 kVA1518A1443A1387A1311A1202AIVSI-500LD-3P-S*
600 kVA1822A1731A1665A1574A1443AIVSI-600LD-3P-S*
750 kVA2278A2164A2081A1967A1803AIVSI-750LD-3P-S*
1000 kVA3037A2885A2774A2623A2404AIVSI-1000LD-3P-S*
1250 kVA3797A3607A3468A3279A3006AIVSI-1250LD-3P-S*
1500 kVA4556A4328A4162A3935A3607AIVSI-1500LD-3P-S*

Note: All IVSI Stabilisers are designed to support the full load at minimum input volts and maximum ambient temperature.

Models (LDY Series) are also available offering a 4 Wire with Neutral Output.

SELECT | Permissible Input Voltage Window Options (S*):

Swing OptionsNominal VoltageMax Model Rating
440V460V480V
S10±10%396 to 484V414 to 506V432 to 528V3000 kVA
S15±15%374 to 506V391 to 529V408 to 552V3000 kVA
S20±20%352 to 528V368 to 552V384 to 576V3000 kVA
S25±25%330 to 550V345 to 575V360 to 600V3000 kVA
S30±30%308 to 572V322 to 598V336 to 624V1500 kVA
S35±35%286 to 594V299 to 621V312 to 648V1500 kVA
S40±40%264 to 616V276 to 644V286 to 672V1500 kVA

SELECT | Required Power Rating:

Power Rating (kVA)Max Rating (Amps per Phase)IVSI Model No
(S*=Add Swing Option No)
440V460V480V
250 kVA327A313A300AIVSI-250HXD-3P-S*
300 kVA393A376A360AIVSI-300HXD-3P-S*
350 kVA459A439A420AIVSI-350HXD-3P-S*
400 kVA524A501A481AIVSI-400HXD-3P-S*
500 kVA655A627A601AIVSI-500HXD-3P-S*
600 kVA787A752A721AIVSI-600HXD-3P-S*
750 kVA983A941A901AIVSI-750HXD-3P-S*
1000 kVA1311A1254A1202AIVSI-1000HXD-3P-S*
1250 kVA1639A1568A1503AIVSI-1250HXD-3P-S*
1500 kVA1967A1882A1803AIVSI-1500HXD-3P-S*
2000 kVA2623A2509A2404AIVSI-2000HXD-3P-S*
2500 kVA3279A3136A3006AIVSI-2500HXD-3P-S*
3000 kVA3935A3764A3607AIVSI-3000HXD-3P-S*

Note: All IVSI Stabilisers are designed to support the full load at minimum input volts and maximum ambient temperature.

Models (HXDY Series) are also available offering a 4 Wire with Neutral Output.

General Technical Specification

General:
 – Design Topology:Brushless Oil Immersed Magnetic Induction
 – Phase:H, LY & HX SeriesThree Phase, 4 Wire (3P+N+GE)
HD, LD & HXD SeriesThree Phase, 3 Wire (3P+GE)
 – Model Nos:IVSI-250*-3P-S*  to  IVSI-3000*-3P-S*
 – Power Ratings:13 Model Ratings-
250 kVA, 300 kVA, 350kVA, 400kVA, 500kVA, 600kVA , 750kVA, 1000kVA, 1250kVA, 1500kVA, 2000kVA, 2500kVA, & 3000 kVA
 – Frequency:47 to 65Hz
 – Phase Control:Independent – maintains each phase voltage stable irrespective of load unbalance, even up to 100% load unbalance.
 – Power Factor:The Power Factor has no effect on performance providing the stabilizer is being used within its rated capacity
Input:
 – Nominal Voltage:H & HD Series*380V, 400V or 415V (Customer to Specify)
LY & LD Series*190V, 200V, 208V, 220V, or 240V (Customer to Specify)
HX & HXD Series*440V, 460V or 480V (Customer to Specify)
 – Permissible Input Voltage Window/Swing (S*):S10 – Nominal Voltage ±10%
S15 – Nominal Voltage ±15%
S20 – Nominal Voltage ±20%
S25 – Nominal Voltage ±25%
S30 – Nominal Voltage ±30%
S35 – Nominal Voltage ±35%
S40 – Nominal Voltage ±40% 
Output:
 – Voltage:H & HD Series*380V, 400V or 415V
 LY & LD Series*190V, 200V, 208V or 220V
 HX & HXD Series*440V, 460V or 480V
 – Voltage Accuracy:±1.5%
 – Response Time:<1.5ms
 – Correction Time:A 10% supply variation will be corrected to within 2.5% in typically 0.6 to 1 second – dependent on the selected permissible input voltage swing and system rating
 – Efficiency:≥97%
Metering, Alerts & Communication:
 – Metering:Input Volts, Output Volts, and Load – complete with Phase Selector Switches
 – Alarms:Over & Low Volts
Loss of Phase & Phase Reversal
Over Temperature
 – Interface:No-Volt Free Contacts (N.C & N.O)
Protection Features:
 – Surge Protection:TVSS – Protects loads against high-energy Spikes and Transient Voltages
 – Lightning Surge Arrestors:SPD – Class II
 – Overload Protection:10 x max. current rating for 2 seconds
3 x max. current rating for 1 minute
2 x max. current rating for 2 minutes
 – Oil Pressure:Oil Pressure Release Valve
Environmental:
 – Operating Temperature Range:-10°C to +45°C
Derate by 2% for each additional °C up to max 60°C
 – Storage Temperature Range:-40°C to +50°C
 – Maximum Altitude:1000 meters (derate by 2.5% per additional 500 meters)
 – Relative Humidity:Suitable for indoor tropical use – 0 to 95% (non-condensing)
 – THD – Harmonic Distortion:< 1%
Physical:
 – Power Connections:Hardwire Input & Output (with top cable entry)
 – Construction:IP20 / NEMA 1 Style – BS EN 60529
 – Paint Colour:RAL 7032 (Grey – Epoxy Powder Coating)
 – Cooling Insulation Oil:Uninhibited Transformer Oil conforming to BS EN 60296 (2004). System supplied oil-filled
 – Dimensions & Weights:Dependent on model rating and configuration
Sizes and weights available on individual request
Certification & Conformance:
 – EMC Conformance:BS EN 55022 and relevant parts of BS EN 61000
 – CE Certification:CE Marked – 2014/30/EU (The EMC Directive) and 2014/35/EU (The Low Voltage Directive)
 – Warranty:2 Years / 24 Months from date of supply
Optional Add-Ons:
 – Main System Switchboard (-MSB):Floor Standing System Switchboard with – 3 Pole (4 Pole Option) Input Circuit Breaker, Output Circuit Breaker, Manual Maintenance Bypass Switch & Metering & Interlocking Protection
 – Power Conditioning (-PC):Addition of a  shielded isolation transformer, to provide enhanced spike & electrical noise (Common Mode: 120db @ 100khz & Normal Mode Noise: 60db @ 100khz) suppression and neutral ground bonding. Delivers what is commonly referred to as a  ‘CLEAN’ supply
– Earth Leakage Relay (-ELCB):Disconnection of the Power in the event of an earth leakage
– ISO Containerisation (-ISO):Stabilizer (and MSB Switchboard) housed in an ISO Container

Sales & Support

Data Sheet
Guide Specification
Operator / User Manual

CE Certification 

IVSI Series Three-Phase Oil Immersed Industrial Voltage Stabilisers comply with the relevant European Union (EU) health, safety, and environmental protection directives and regulations and are duly CE marked.

Ashley-Edison (UK) Declaration

EMC Directive – 2014/30/EU – in force from April 2016

Low Voltage Directive – 2014/35/EU – in force from April 2016

If you do not find the Industrial Voltage Stabiliser that meets your application’s exact needs, please contact us with your specific detailed requirements.