K-rate (K-Factor Rated) Transformer
Feature
This is the transformer which adapted to
UL-1561 21.1.4 (Temperature rise)
The server (load facilities of the secondary side) generates harmonics for non-linear loads.
Harmonic distortion will cause transformer to overheat or affect power system equipment.
Effects of harmonics on transformers
Increase in load loss of the winding caused by skin effect.
Increase in eddy current loss
Increase in N phase electric current.
Specification
| Type | Dry-type self-cooling system |
|---|---|
| Normal usage condition | For indoor use, ambient temperature -5 to 40°C (daily average below 35°C, yearly average below 20°C) above altitude l000m or less |
| Applicable standard | JEC-2200(2014)transformer & JEM-1310(2001)Dry-type transformer, rise limit and winding standard temperature (Insulation Class H) UL-1561 21.1.4 ( Temperature rise ) |
| Insulation class | Insulation class [ H ] & temperature rise limit : 140K (Winding temperature rise) |
| Installation location | Indoor installation without case, cubicle storage |
| Harmonic tolerance | K=13 |
| Neutral current | 200% correspondence |
| Magnetizing inrush current | Double or less |
| Impedance percentage | 6% or less ( at time of K=13 ) |
| Number of phases | Three-phase | Three-phase / Two-phase (Scott) |
|---|---|---|
| Frequency (Hz) | 50 or 60 | |
| Primary voltage [V] | F440-R420-F400 ( 50Hz ) F460-R440-F420 ( 60Hz ) |
420 ( 50Hz ) 440 ( 60Hz ) |
| Secondary voltage [V] | R210/121-F182/105 | 210-105 x 2 circuit |
| Connection | 7 wire system( ) |
 |
| Capacity (kVA) | 100 150 200 250 300 |
100 150 200 250 300 |
Principal Use
It is greatly adopted in domestic iDC (Internet Data Center)
for UPS (Uninterruptible Power Supply)
for PDU (Power Distribution Unit)
Power supply for data management and for building-related use
Download
K-rate (K-Factor Rated) Transformer Catalog
Please inquire about custom products.