50 kVA Three-Phase Ultra-Isolation Transformer
Three-phase 50 kVA ultra-isolation transformer engineered for maximum electromagnetic isolation and noise reduction. Features dual-layer shielding and optimized grounding for critical industrial applications.
Ref. ULTRA-ISO-50-3PH · Lead time 6–8 weeks · Made to order from Hapur
See full engineering specification & variants
Key Features
Recommended For
Specifications
| Specification | Value |
|---|---|
| Capacity | 50 kVA |
| Primary Voltage | 415V, 3-Phase |
| Secondary Voltage | 415V, 3-Phase |
| Frequency | 50/60 Hz |
| Phase Shift | 30° (can be configured) |
| Voltage Regulation | ±1.5% |
| Cooling Method | both air and oil cooled |
| Weight | 1100 kg |
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 50 kVA specifically, not the range in general.
70 A per phase
50 kVA at 415 V three-phase is about 70 A. Isolation transformers are sized on connected load, not on the diversified figure — total the nameplate rating of everything downstream rather than a metered average.
±1.5%
±1.5% describes how far output sags between no load and full load. It is not voltage correction: an isolation transformer passes incoming fluctuation straight through. If your supply itself is unstable, this belongs downstream of a servo stabilizer, not instead of one.
Dual-shielded (ultra)
Dual-layer electrostatic shielding targets common-mode noise and high-frequency transients, not just galvanic separation. This is the grade specified where measurement integrity matters — semiconductor tooling, metrology benches, imaging systems — and is over-specified for general machine isolation.
Sizing Guide
When is 50 kVA the right choice?
50 kVA ultra-isolation is specified for measurement integrity, not for load. The rating covers a full toolset — a semiconductor metrology bay, a research cleanroom's instrument supply, an EMC or calibration laboratory — but the reason to choose the ultra grade over standard isolation at the same kVA is the dual-layer electrostatic shielding and 30° phase shift, which together attenuate the common-mode noise and high-frequency transients a single-shield 1:1 unit passes straight through. If your symptom is earth loops or nuisance leakage trips, standard isolation at a lower rating will solve it for considerably less. Choose ultra when the symptom is measurement drift, data corruption, or unexplained instrument noise.
Before you order
Where 50 kVA goes in, and what the site needs
Typical installations
We supply 50 kVA most often into semiconductor manufacturing, precision electronics labs, research facilities and industrial testing centers, alongside cnc machine tools and medical imaging systems. What separates those sites is the sensitivity of what sits downstream, not the kVA. The same rating protects a production machine and a metrology bench, but the earthing arrangement and shield termination that each needs are not the same, and getting that wrong wastes the transformer.
Site preparation
At 1,100 kg this is forklift work, and the forklift has to be rated for 1,100 kg at the extended reach that placement requires. Confirm floor loading before it arrives — a ground-floor workshop slab is normally adequate, a mezzanine generally is not. 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 50 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.
20 kVA Three-Phase Isolation Transformer
Three-phase 20 kVA isolation transformer for medium-load equipment protection.
View specificationIsolation Transformer10 kVA Single-Phase Isolation Transformer
High-isolation single-phase transformer for sensitive electronic equipment protection.
View specificationAlso in the transformer range
Different equipment rather than a different size — often specified alongside this on the same project.
63 kVA Distribution Transformer (11kV)
63 kVA distribution transformer for medium-scale power distribution.
View specificationDistribution Transformer25 kVA Distribution Transformer (11kV)
Standard distribution transformer for 25 kVA load, 11kV primary voltage.
View specificationDistribution Transformer100 kVA Distribution Transformer (33kV)
Heavy-duty 100 kVA distribution transformer for medium-voltage grid integration.
View specificationEngineering detail on this configuration
The ultra-isolation transformer pages carry the full design rationale, comparison tables and application notes behind this SKU.
Ready to specify?
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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.
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