QDTB® Transformer

SFFZ-250/0.48/0.24

SFFZ Series • 250kVA • 0.48/0.24 kV

Product Image & Parameters

SFFZ - QDTB

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SFFZ-250/0.48/0.24

SFFZ Series

Capacity
250kVA
HV Voltage
0.48kV
LV Voltage
0.24kV
Frequency
60Hz
Short-circuit impedance
6%
Cooling method
AN
Efficiency
National/industry standard
Applied standard
IEEE C57 / ANSI C84.1
Connection
Delta-Wye (IEEE Std)
Energy SavingLow Loss

TECHNICAL DRAWING

Model: SFFZ-250/0.48/0.24 | Type: Oil-immersed transformer | Capacity: 250 kVA

FRONT ELEVATION

Oil level1U1V1W2U2V2W2NTAPN.P.180mm240mm

ELECTRICAL SCHEMATIC

HV WINDING (Delta)1U1V1WLV WINDING (Star)2U2V2W2NDelta-Wye (IEEE Std)

EFFICIENCY vs LOAD

90%95%98%99%0%25%50%75%100%≈99%load %efficiency %

SIDE VIEW

Oil level135mm

TOP VIEW

1U1V1W2U2V2W2N135mm

TERMINAL BLOCK

HV TERMINAL BLOCK1U1V1W1N1PELV TERMINAL BLOCK2U2V2W2N2PE2122Terminal block configurationTin-plated copper busbar

CORE & WINDING

OIL / TANKHV winding/bushingINSULATIONLV winding/bushingIron coreconcentric cross-section

Technical specifications

1. Model:SFFZ-250/0.48/0.24
2. Type:Oil-immersed transformer
3. Capacity:250 kVA
4. Frequency:60 Hz
5. HV voltage:0.48 kV
6. LV voltage:0.24 kV
7. HV current:300.7A
8. LV current:601.41A
9. Vector group:Delta-Wye (IEEE Std)
10. Impedance:6%
11. Insulation level:H (180°C)
12. Temperature rise:65K
13. No-load loss:7623W
14. Load loss:19058W
15. No-load current:1%
16. Cooling method:AN
17. Tap changer:±2×2.5% Multi-tap
18. Standard:IEEE C57 / ANSI C84.1
19. Dimensions:700×580×700 mm
20. Weight:750kg
LEGEND:
Iron core
HV winding/bushing
LV winding/bushing
Dimension line

Product Description

250kVA, 3-phase isolation, dry-type transformer, 60Hz, primary 480V (HV 480V), secondary 240V (LV 240V), Standard, insulation H, impedance 6%

Related Keywords

SFFZ-250/0.48/0.24 isolation control transformer250kVA control transformerprimary 0.48kV secondary 0.24kVSFFZ split winding transformer for power plant auxiliary system

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Aluminum winding — no copper linkage

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SFFZ-250/0.48/0.24 - Frequently Asked Questions

QWhat are the main applications of SFFZ-250/0.48/0.24?

SFFZ-250/0.48/0.24 (SFFZ series, Special/Isolation/Control Transformers) is widely used in industrial power distribution, commercial buildings and utility power systems. Can be flexibly configured according to actual project requirements.

QWhat are the main technical specifications of SFFZ-250/0.48/0.24?

Key specifications: Capacity: 250kVA, HV 0.48 kV, LV 0.24 kV, Frequency 60 Hz, Impedance 6%, Connection Delta-Wye (IEEE Std), Cooling AN, Standard IEEE C57 / ANSI C84.1.

QCan SFFZ-250/0.48/0.24 be custom ordered?

Yes. QDTB® provides comprehensive OEM/ODM customization services. Parameters such as capacity, voltage ratio, cooling method, connection group and protection class can all be adjusted. Over 25 years of manufacturing experience ensures consistent quality.

QHow to get a quote and technical documentation?

Contact via the "Send Inquiry" button below, or contact sales at Alice@qdtb-transformer.com / +86 13698683193. We provide detailed quotations and technical documentation instantly.

Related Products in SFFZ Series

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Rated Capacity: 0.1kVA
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