1500 KVA Dry Type Transformer-10/0.4 KV

K4-rated 1500 kVA dry type transformer for reliable data center power

01 General

1.1 Project Description

The 1500kVA dry-type transformer is specifically designed to meet the high reliability, safety, and power quality requirements of modern data centers. It steps down the 10 kV medium-voltage utility supply to 0.4 kV for critical IT loads, UPS systems, cooling equipment, and auxiliary facilities.

With a Dyn11 vector group, the transformer provides stable neutral grounding and effective suppression of unbalanced loads, making it well-suited for data center power distribution architectures. The F-class insulation system with an 80 K temperature rise ensures long-term thermal reliability under continuous operation and partial overload conditions, which are common in data centers.

The transformer features low partial discharge (≤10 pC) and high-quality epoxy resin cast windings, significantly reducing the risk of insulation degradation and unplanned outages. Its K4 rating allows it to handle harmonic currents generated by UPS systems, rectifiers, and non-linear IT loads without compromising service life.

Natural air cooling (AN/AN) eliminates the need for forced ventilation, resulting in low noise levels (56 dB) and reduced maintenance requirements-an important advantage for indoor installations close to mission-critical areas. The IP31 protection degree and solidly grounded neutral enhance operational safety and system protection coordination.

Compliant with IEC 60076, this transformer is an ideal solution for indoor data center substations, offering high efficiency, high reliability, and stable performance to support 24/7 continuous operation.

1.2 Technical Specification

1500kVA dry type transformer specification and data sheet

Delivered to	Indonesia
Year	2025
Type	Cast coil dry type transformer
Standard	IEC 60076 & IEC
Rated Power	1500KVA
Frequency	50HZ
Phase	three
Cooling Type	AN
Primary Voltage	10 Kv
Secondary Voltage	0.4 Kv
Vector Group	Dyn11
Winding Construction (HV/LV)	Wire/ Coil
Winding Material	Copper
Impedance	6%
Insulation class (HV/LV)	F/F
Noise level (Lp)	56 dB
K factor	K4
Tap Changer	NLTC
Tapping Range	±2*2.5%
Protection Grade	IP31(indoor)
No Load Loss	3500 W
On Load Loss	11730 W
Lightening impulse(HV/LV)	95/0 kV
Power frequency withstand (HV/LV)	35/3 kV
Neutral grounding type	Solid grounded
Accessories	Temperature Controller，Condensation controller, Heater, Zero Sequence CT(HV)

1.3 Drawings

1500kVA dry type transformer dimensions and nameplate

1500 kva 10 kv to 0.4 kv 1500 kva dry type cast coil transformer technical drawing

1500 kva 10 kv to 0.4 kv 1500 kva dry type cast coil transformer layout drawing

1500 kva 10 kv to 0.4 kv 1500 kva dry type cast coil transformer nameplate

02 Key Advantages

2.1 Designed for Data Center Reliability

This 1500 kVA dry type transformer is engineered specifically for data center applications, where loads are continuous, nonlinear, and sensitive to voltage fluctuations; the Dyn11 configuration provides a stable neutral point and isolates harmonics between primary and secondary sides, improving power quality across IT systems, UPS units, and cooling infrastructure.

2.2 High Thermal Reliability – F Class + 80K Rise

1500 kVA dry type transformer coils F-class insulation

The combination of F-class insulation (155°C limit) and an 80K temperature rise ensures that this 1500 kVA dry type transformer can operate safely under long-duration loading and even partial overload conditions, which are typical in data centers with fluctuating IT demand; this design provides sufficient thermal headroom, extending insulation life and reducing failure risk.

2.3 Ultra-Low Partial Discharge (≤10 pC)

The epoxy resin cast coil structure ensures extremely low partial discharge levels, which is a critical indicator of insulation quality; in this 1500 kVA dry type transformer, ≤10 pC PD significantly reduces insulation degradation over time and minimizes the probability of unexpected outages.

2.4 Safety-Oriented Design

1500 kva dry type transformer -main-view

The IP31 enclosure and solidly grounded neutral design enhance operational safety, enabling effective fault detection and protection coordination; combined with IEC-compliant insulation levels (95kV LI / 35kV AC), this 1500 kVA dry type transformer ensures safe and reliable operation within indoor substations-while maintaining a low noise level of just 56 dB, making it ideal for installation close to sensitive data center environments.

03 K-Factor (K4) Deep Insight

K-Factor defines the ability of a transformer to handle harmonic currents without excessive heating. In this 1500 kVA dry type transformer, the K4 rating indicates suitability for moderate harmonic environments such as:

UPS input systems
IT server loads
Rectifiers and VFDs
Commercial and light industrial facilities

Through reinforced winding design and thermal validation, the transformer maintains rated capacity even under distorted current waveforms-ensuring long-term reliability in real operating conditions.