75 kVA Servo Voltage Stabilizer
The 75 kVA Servo Voltage Stabilizer bridges entry-level and mid-range operations. Perfect for growing businesses needing reliable power conditioning as they scale.
Ref. SVS-75-3PH · Lead time 1 week · Made to order from Hapur
See full engineering specification & variants
Key Features
Recommended For
Specifications
| Specification | Value |
|---|---|
| Capacity | 75 kVA |
| Input Voltage | 300V–470V, 3-Phase |
| Output Voltage | 415V ±1% |
| Frequency | 50/60 Hz |
| Response Time | < 20 ms |
| Cooling Method | air cooled |
| Weight | 325 kg |
| Warranty | 3 years |
Reading the specification
What these numbers mean for your installation
A datasheet tells you what the unit does. This is what each figure changes about how you specify, feed and site it — worked out for the 75 kVA specifically, not the range in general.
104 A per phase
At 415 V three-phase, 75 kVA works out at roughly 104 A per phase. Terminate this into the stabilizer's own cable chamber via a gland plate. Check the plate is drilled for your cable diameter before delivery, and size the upstream breaker at 130 A so the protection device is never the limiting element in the feed.
300V–470V
The unit holds output at 415V ±1% anywhere between 300 V and 470 V in. Pulling a 300 V supply back up to 415 V means adding 115 V — a 38% lift on the incoming supply, with the series winding carrying roughly 21 kVA of the 75 kVA throughput. Below 300 V it runs out of range, and the answer is a wider-window build, not more kVA.
< 20 ms
< 20 ms matters more than the ±1% accuracy figure for most buyers. The failure that actually costs you is a drive faulting on undervoltage when a large motor elsewhere on the feeder starts, and correction inside < 20 ms is what prevents it.
125% for 1 hour
Direct-on-line starting draws six to eight times full-load current for a few seconds, and 125% for 1 hour is the margin that absorbs it. Keep steady-state load below about 80% of 75 kVA so this headroom is still available when the largest motor starts.
Sizing Guide
When is 75 kVA the right choice?
75 kVA is the sweet spot for a small food processing unit — one 30 kW boiler, a 15 kW blending line, conveyors, and packaging automation together draw roughly 60–70 kVA. It is also the standard choice for diagnostic centres with MRI prep rooms (not the MRI itself, which needs its own dedicated unit) and small sheet metal fabrication shops with a press brake, guillotine shear, and spot welder running on the same feeder. At 75 kVA, you are at the upper limit of reliable air-cooled performance — this unit runs air-cooled, but if ambient temperatures exceed 45°C in your electrical room, specify the oil-cooled variant.
Before you order
Where 75 kVA goes in, and what the site needs
Typical installations
We supply 75 kVA most often into small to medium manufacturing, food processing plants, diagnostic centers and industrial training centers, alongside light assembly operations and precision workshops. What separates those sites is duty cycle rather than load. A rating that runs cool on single-shift work sits near the top of its thermal range on a continuous three-shift line, and that is the point at which oil cooling stops being optional.
Site preparation
At 325 kg you need a pallet truck at minimum and a level, load-spreading base. Check the route for ramp gradients — a hydraulic truck carrying 325 kg will not climb much of one. Leave working clearance on the terminal side for cable entry and inspection. Sustained ambient above 45 °C, or an enclosed room without cross-ventilation, requires derating — send us the room conditions and we will confirm the rating still holds where you intend to put it.
Adjacent ratings
If 75 kVA is not the right size
Sizing rarely lands exactly on a catalogue rating first time. These are the ratings either side of it in the same range — compare the specification before you commit.
100 kVA Servo Voltage Stabilizer
Industrial-grade servo voltage stabilizer for 100 kVA loads with precise voltage control.
View specificationServo Voltage Stabilizer50 kVA Servo Voltage Stabilizer
Mid-range servo voltage stabilizer for 50 kVA industrial loads.
View specificationServo Voltage Stabilizer125 kVA Servo Voltage Stabilizer
Precision servo stabilizer for 125 kVA industrial loads with enhanced voltage control.
View specificationServo Voltage Stabilizer25 kVA Servo Voltage Stabilizer
Compact servo stabilizer ideal for small industrial operations and startups.
View specificationServo Voltage Stabilizer150 kVA Servo Voltage Stabilizer
Compact servo stabilizer for 150 kVA industrial operations.
View specificationServo Voltage Stabilizer175 kVA Servo Voltage Stabilizer
High-capacity servo stabilizer for 175 kVA industrial applications.
View specificationEngineering detail on this configuration
The servo voltage stabilizer pages carry the full design rationale, comparison tables and application notes behind this SKU.
Ready to specify?
Share your load profile. Get a firm proposal in 24 hours.
Send us your kVA requirement, supply voltage range, and site conditions. Our engineer will confirm whether this configuration is correct for your installation, or specify an alternative if needed. No distributors — direct from our factory in Hapur.
Submit load requirements