Fuji Electric
Servo Controlled Voltage Stabilizer (Air Cooled)
- Air cooled 3 to 500 kVA
- Digital micro-controller
- Correction 70 V/s
- Efficiency > 98%
- 0 to 45 °C operating
Overview
Fuji Electric's servo controlled voltage stabilizers hold a set output voltage on a fluctuating three-phase supply. This page covers the AIR COOLED variant only.
All parameters are set through the keypad on the front panel, there are no potentiometer adjustments.
Cooling: natural air cooled up to 150 kVA and forced air cooled above 150 kVA (per the spec sheet). Custom models are available on request.
Capacity options
3 to 150 kVA
Natural air cooled
Above 150 kVA
Forced air cooled
Custom
Custom models on request
Features
Features & benefits
- No potentiometer adjustments
- All parameters can be modified using the keypad in the front panel
- Set input voltage band
- Set output voltage
- Set output voltage sensitivity
- Output over / under voltage cut-off
- Input over voltage / under voltage cut-off
- Over load cut-off
- Trip time delay adjustments with variable setting
- Manual and auto start facility
- Output start and stop facility
Protections
- Electronic over & under voltage trip with time delay for input & output
- Electronic overload protection and short circuit protection up to 30 kVA through MCB, with built-in manual bypass; above 30 kVA, MCB/MCCB is optional
- Surge arrester / RF suppressor (optional)
- Phase reversal protection and cut-off
- Single phase prevention and cut-off
- Neutral failure protection
- Frequency cut-off protection
- Earth neutral voltage cut-off protection
Digital metering (Class 1 accuracy, full scale ± 1)
- Input phase to neutral
- Input phase to phase
- Output phase to neutral
- Output phase to phase
- Load current in all the phases
- Frequency
Technical specifications
Transcribed from the manufacturer's spec sheet. Confirm the exact model and configuration with us before purchase.
- Capacity (table entry)
- 3 to 3500 kVA
- Input voltage range*
- Range 1: 295 to 465 V · Range 2: 340 to 480 V · Range 3: 360 to 460 V
- Output voltage range*
- 380/400/415 V ± 1% set
- Input frequency
- 47 to 53 Hz
- Control type
- Digital, micro-controller based
- Correction speed*
- 70 V per second
- Reset
- Manual / auto reset with time delay and programmable
- Audio alarm
- For tripping conditions
- Nature of cooling
- Natural air cooled up to 150 kVA & forced air cooled above 150 kVA
- Effect of power factor
- Nil
- Waveform distortion
- Nil
- Annunciation panel
- Non-latching LED indications with dual colour for overload latching conditions
- Efficiency
- > 98%
- Cabinet colour
- Dark grey
- Provision of cabling
- Input and output terminations with provisions for fixing cable glands
- Servo motor drive
- Rugged AC step synchronous motor
- Operating temperature
- 0 to 45 °C
- * Range can be customised to customer requirement (manufacturer note).
- The brochure title and table subtitle state “Air Cooled 3 to 500 kVA”, while the table's capacity row reads “3 to 3500 kVA”. We show both exactly as printed, please confirm the capacity you need with us before ordering.
- All specifications are subject to change. Custom models available on request.
Suitable applications
- Factories, CNC and workshop machinery
- Hospitals, labs and diagnostic equipment
- Commercial buildings, lifts and HVAC
- Large residences on fluctuating supply
Frequently asked questions
Air cooled or oil cooled: which do I need?
This page covers the air-cooled range only. Air-cooled units are natural air cooled up to 150 kVA and forced air cooled above that. If you need an oil-cooled unit, ask us, it is a different product.
What input voltage range will my stabilizer handle?
The spec sheet lists three standard input ranges (295 to 465 V, 340 to 480 V, 360 to 460 V), and the range can be customised to your requirement. A site voltage reading helps us choose correctly.
How do I size the stabilizer?
Add up the kVA of the connected equipment, allow for motor starting currents and future expansion, and share it with us. We will suggest a suitable rating.
Related products
Enquire about Servo Controlled Voltage Stabilizer (Air Cooled)
Prices and availability are confirmed on enquiry. We respond by phone or WhatsApp.