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HET 400kVA/4.8kV Exciter Transformer | Triple-Range Testing (2.4-4.8kV) with 20-300Hz Frequency

The HET 400kVA/4.8kV Exciter Transformer offers triple voltage ranges (2.4-4.8kV) with 20-300Hz frequency flexibility, electrostatic shielding, and continuous 60-minute operation for demanding test applications.

US$ 24,263.00
Lead time: 30 days

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Product Details

Product Tags

HET 400kVA/4.8kV Exciter Transformer - Variable Frequency Testing Solution

The HET 400kVA/4.8kV,3.6kV,2.4kV Exciter Transformer delivers exceptional flexibility for low-frequency testing (20-300Hz) with three voltage outputs, independent HV windings, and industrial-grade thermal stability for continuous operation.

Technical Specifications

Parameter	Specification
Rated Capacity	400kVA
Frequency Range	20-300Hz (Rated 20Hz)
HV Winding Voltage	2.4kV, 3.6kV, 4.8kV (Independent)
HV Winding Current	166.6A (2.4kV), 111.1A (3.6kV), 83.3A (4.8kV)
LV Winding Voltage	2×460V, 2×500V
LV Winding Current	2×424.8A
Cooling System	ONAN (Oil Natural Air Natural)
Thermal Limits	Continuous 60min operation: Winding ≤65K, Oil ≤55K
Noise Level	≤60dB
Impedance Voltage	<5%

Advanced Design Features

Core & Winding Technology

Premium Core Material: D0130-30 cold-rolled silicon steel with ultra-low Bm value
Independent HV Windings: Three separate coils for precise voltage selection
Electrostatic Shielding: Isolation filter between LV/HV windings

Monitoring & Protection

Integrated Measurement: HV-side voltage measurement coil
Oil Management System:

Expansion tank with moisture absorber
Temperature thermograph and level indicator

Structural Advantages

Shell-Type Construction: Oil-immersed design with transport-safe components
Safety-Spaced Windings: Prevents partial discharge and corona effects
Copper Lead Wires: Low-resistance connections for high-current capacity

Performance Benefits

Frequency Flexibility

20-300Hz range for specialized test protocols

High Current Output

166.6A at 2.4kV for demanding loads

Thermal Stability

Continuous 60-minute operation at rated capacity

Precision Measurement

Integrated HV voltage monitoring

Typical Applications

Low-frequency withstand voltage testing
Power transformer diagnostic tests
High-voltage cable aging studies
Industrial equipment insulation validation

Standards Compliance

IEC 60076 (Power Transformers)
IEEE C57.12.01 (General Requirements)
EN 60296 (Transformer Oil Standards)

Why Choose This Transformer?

Unique Frequency Range: 20Hz capability for specialized testing
Triple-Voltage Flexibility: 2.4kV to 4.8kV in one unit
Industrial Durability: Continuous operation capability
Measurement Ready: Built-in HV monitoring

Conclusion

The HET 400kVA/4.8kV Exciter Transformer combines rare low-frequency capability with high-current capac