voltage drop compensators

our solution to long cable runs

Small Cables

Purposefully designed with the sole intention to eliminate high inherent voltage drops, Ashley-Edison’s Voltage Drop Compensators solves this by significantly boosting up the low voltage at incoming supply to its optimal set output value and maintains it continuously and automatically. This results in substantial cost savings on reduced electrical power cables, conventionally used to overcome voltage drop.

200KVA to 2,500KVA
Compensating Voltage Drops of up to 125V
Reducing Oversized Cable Costs
Available with Parallel Redundancy Module

get more than
what you pay for

Voltage Drop Compensator

Save more, for less

Massively reduce large and expensive electrical power cables by “compensating” for high voltage drops, the cost-effective way. This added advantage also ensures cable installations are made more convenient due to smaller cable sizes.

Parallel redundancy

Ashley Edison’s proven, field-tested Parallel Redundant Voltage Regulation Control Modules (VRCM) are incorporated on each phase of our Voltage Drop Compensators. In the unlikely event of a fault on one module, the other parallel module will operate automatically without causing interruption to the load. The other unaffected phases will operate as normal, ensuring continual voltage control regulation, whilst compensating for voltage drop at the load end.

Constant & continually on

Regardless of load change on demand, the output voltage is kept constant, from no load to full load. This optimises and prolongs equipments’ life span, leading to more passive savings from reduced maintenance costs, while concurrently taking care of voltage drop issues .

Protecting your uptime

The Ashley Edison Voltage Drop Compensator ensures loads are receiving appropriate and stable voltage, improving overall system performance and efficiency, minimising unforeseen system downtime.

Available in Indoor IP20 (NEMA 1 Style) and Outdoor IP54 (NEMA 3 Style) Enclosures

Technical Features

Input Circuit Breaker

Overcurrent Protection.

Bypass Control Switch

Manual Electronic Control Bypass Facility.

Inbuilt High Overload

For loads with an inherent initial high current draw on start-up.

Transient Voltage Surge Suppression

Protects electrical and electronic loads against harmful high-energy surges, transients and voltage spikes.

Phase Failure Protection

Loading Protection in the event of Phase Failure. 

Soft Start-Up Load Protection

Protection of the load from momentary overvoltage situations on startup.

Over / Low Voltage Protection

Ability to automatically shut down the Voltage Stabiliser in the event of the input supply voltage going outside the input voltage window.

Lightning Surge Arrestors

Protection against extremely high voltage surges and transients caused by lightning strikes on the supply line.
Standard for outdoor models.

volt-free remote monitoring contacts

With RS-485 interface or Mimic Panel option.

cloud-based data system analysis

Real-time wireless applications for Measurement and Verification of energy and resource consumption.

ISO 9001:2015 | CE Mark | BS EN 55022 | BS EN 61000 | BS EN 60529 | CE MARKED

Product FINDER

Voltage drop compensators


1KVA ~ 100KVA

  • Input Range:
    From 77V~133V (depending on model selection)
  • Output:
    220V / 230V / 240V
  • Indoor IP20 / Outdoor IP54 Enclosure
  • Input Circuit Breaker
  • Floor Standing


1KVA ~ 50KVA

  • Input Range:
    From 77V~133V (depending on model selection)
  • Output:
    100V / 110V / 115V / 120V
  • Indoor IP20 / Outdoor IP54 Enclosure
  • Input Circuit Breaker
  • Floor Standing
voltage drop compensators


250KVA ~ 2500KVA

  • Input Range:
    From 290V~430V (depending on model selection)
  • Output:
    380V / 400V / 415V
  • Indoor IP20 / Outdoor IP54 Enclosure
  • Parallel Redundant Voltage Regulating Control Module
  • Floor Standing


6KVA ~ 750KVA

  • Input Range:
    From 290V~430V (depending on model selection)
  • Output:
    380V / 400V / 415V
  • Indoor IP20 / Outdoor IP54 Enclosure
  • Input Circuit Breaker
  • Floor Standing


6KVA ~ 600KVA

  • Input Range:
    From 290V~430V (depending on model selection)
  • Output:
    380V / 400V / 415V
  • Indoor IP20 / Outdoor IP54 Enclosure
  • Input Circuit Breaker
  • Floor Standing


From brownouts to severe voltage fluctuations, Ashley Edison takes care of all your power needs by delivering optimised, stable voltage supply to your electrical system.


Curious to learn more? Get in touch with us. We’ll get back to you with a quote or solution within 24 hours and put all your questions to rest.

ASHLEY Edison International LTD


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Three Phase

SESL-H-3P-S Model
Large Capacity Rating
200 to 2,000 KVA


Enclosure 335
1000W x 1300H x 580D (mm)
250~300 KVA ± 15%
120~200 KVA ± 20%


Enclosure 336
1280W x 1480H x 660D (mm)
400 KVA ± 15%
250 KVA ± 20%


Enclosure 337H
1880W x 1950H x 880D (mm)
500 KVA ± 15%
300 KVA ± 20%


Enclosure 339
1470W x 1950H x 1340D (mm)
600 ~ 1,500 KVA ± 15%
400 ~ 1,000 KVA ± 20%
300 ~ 750 KVA ± 25%
300 ~ 600 KVA ± 30%

Three Phase

SES-H-3P-S Model
Added I/P Breaker Protection
60 to 1,000 KVA


Enclosure 333
490W x 800H x 990D (mm)
≤ 100 KVA ± 15%


Enclosure 334
540W x 900H x 1000D (mm)
120 – 150 KVA ± 15%


Enclosure 335
1000W x 1300H x 580D (mm)
180 – 300 KVA ± 15%
120 – 200 KVA ± 20%
120 – 150 KVA ± 25%


Enclosure 336H
1880W x 1480H x 660D (mm)
400 KVA ± 15%
250 KVA ± 20%
180 ~ 200 KVA ± 25%


Enclosure 337H
1880W x 1950H x 880D (mm)
500 KVA ± 15%
300 KVA ± 20%
250 KVA ± 25%


Enclosure 339H
2170W x 1950H x 1340D (mm)
600~1,000 KVA ± 15%
400~600 KVA ± 20%
300~400 KVA ± 25%

Single Phase

SES-H-S Model
Added I/P Breaker Protection
1 to 100 KVA

Enclosure 102
270W x 460H x 490D (mm)
≤ 20 KVA ± 30%
≤ 15 KVA ± 20%
≤ 10 KVA ± 25%
≤ 10 KVA ± 15%

Enclosure 103
400W x 580H x 500D (mm)
25 KVA ± 15%
20 KVA ± 20%
15 KVA ± 25%

Enclosure 332
380W x 670H x 780D (mm)
30 KVA ± 15%

Enclosure 333
490W x 800H x 990D (mm)
40 ~ 50 KVA ± 15%
25 ~ 30 KVA ± 20%
20 ~ 25 KVA ± 25%
15 ~ 20 KVA ± 30%

Enclosure 334
540W x 900H x 1000D (mm)
60 ~ 75 KVA ± 15%
40 ~60 KVA ± 20%
30 ~ 50 KVA ± 25%
25 ~ 40 KVA ± 30%

Stay Safe With Greater Protection

As safety is our utmost priority, Ashley Edison prepares for every scenario possible
—taking the puzzle out of your protection.

Designed And Engineered With Safety In Mind

We leave nothing to chance when it comes to larger capacity units (≥400KVA). By installing high-quality protective acrylic shields in front of live parts, we ensure the safety of your personnel at all times. For enhanced protection during installation, all distances between uninsulated metal parts, busbars, and cable sizes are compliant with IEC61439-1 and IEC 61439-2 guidelines.

Outfitted with fireproof cable trunking, this protective solution safeguards against long fire exposure even in hazardous areas and explosive atmospheres—providing maximum safety for mission critical applications.

Fuss-Free Installation. Seamless Operations.

To ensure ease of installation, Ashley Edison addresses the concerns of contractors and installers by keeping it simple.



We keep the installation process simple and streamlined by allowing sufficient working space for installers. Taking the nut and bolt intrusions into consideration, we ensure that the distance between the uninsulated metal parts, the busbars, and cable sizes are compliant with IEC61439-1 and IEC 61439-2 guidelines.


Even in units with larger capacities, all busbar terminals are clearly marked out, and well positioned in line for easy identification of individual input and output terminations. Installation of these terminations are similar to those practised in high voltage transformers.

Easy Maintenance

Annual Ocular Maintenance
Visual Inspection 230

Conduct Visual Inspection On Voltmeter:

Ensure reading is set to your desired set output voltage value (e.g. 230V).

LED Status

Ensure LED Status Indicators are at “Normal”.

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Visual Observation Of Variable Transformer Surface:

Use airbrush for dusty environments if necessary.

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Visual observation if carbon brush is not worn out.

Moving Motor

Conduct visual inspection to check variable transformers are all regulating (moving).


Accuracy. Beyond Imagination.

The digitally enhanced Ashley Edison MBB Card ensures pinpoint voltage stabilisation against the most erratic anomalies, allowing you to protect precious uptime, effortlessly. Harnessing ultra precision capabilities to produce some of the tightest output voltage tolerance available in the industry, the Ashley Edison MBB Card delivers ±0.5% voltage accuracy, enabling your load equipment to enjoy optimal voltage supplies, regardless of load change in your electrical system.

Expert Digital Control

Utilising the advantageous measurements of true RMS, the Ashley Edison MBB Card’s reads both perfect, sinusoidal waves, as well as complex, distorted non sinusoidal waves—up to 0.1V accuracy. Coupled with lightning fast response time of 1.5ms, this expert digital control feature equips your load with total voltage protection that is precise, continuous and ultra responsive.

AE Digital Control Display_230v

Universal Presettable Function

The Universal Presettable Function onboard the Ashley Edison MBB Card allows seamless control of your desired output voltage value on all 3 Phases—with just a touch of a button. This multifunctional feature enables each AVR to fully operate with just 1 card, instead of separate cards for each individual phase. Fitted LED Output Voltmeter Display and Alert Indicator better facilitates easy status monitoring while performing maintenance on your AVR.


Microcontroller Unit (MCU)

MicroController Unit (MCU) helps you to deliver high speed and reliable efficiency in the AVR’s operations with less heat generation and reduced power consumption. Used in Supercomputers, Surface Mount Technology (SMT) allows components in the Ashley Edison MBB Card to be aligned closer together, creating a more compact and lightweight end product. Additional safety wire-to-board feature establishes fail-proof connectivity between circuits—so you can work safely on your AVR.