Dry Type Transformer

SC(B)15 Amorphous Alloy Epoxy Dry Type Power Transformer

The amorphous alloy epoxy dry-type transformer by applying advanced HTT epoxy dry-type transformer manufacturing technology. This product features low partial discharge, low loss, excellent heat dissipation, strong moisture resistance, outstanding short-circuit resistance, high overload capacity and compact appearance. Its performance fully complies with the standard GB/T 22072 Technical Parameters and Requirements for Amorphous Alloy Iron Core Distribution Transformers. Compared with Group A transformers specified in GB/T 10228, its no-load loss is reduced by more than 70%, and load loss is reduced by 15%, making it a new generation of energy-saving, safe, green and environmentally friendly high-tech electrical product. This transformer can replace all ordinary dry-type transformers in their application scenarios, suitable for high-rise buildings, commercial centers, subways, airports, stations, mining enterprises and power plants. It is especially ideal for places with high fire safety requirements (flammable and explosive environments) and high moisture resistance demands.

Model Naming Rule: S C □ H 15 – □ / □

Symbol	Meaning
S	Three-phase
C	Cast solid insulation
H	Amorphous alloy iron core
15	Performance level code
□ (before /)	Rated capacity (kVA)
□ (after /)	Voltage class (kV)
Additional Mark (Optional)	B: Enameled wire; L: Aluminum conductor

Reference Standard

GB/T1094.11; GB/T1028; IEC60076; DIN42523.1; GB/T22072

Note: The actual installation dimensions are subject to the overall outline drawing provided when ordering. Noise-absorbing shells can be configured according to customer needs, reducing noise by more than 10dB compared with ordinary shells.

Product Features

□ Rated capacity: 30-2000 kVA
□ Voltage class: 0.4-10 kV
□ Phase number: Three-phase or single-phase
□ Frequency: 50Hz or 60Hz
□ Insulation class: Class F, average temperature rise of winding ≤ 100K
□ Cooling method: AN or AF
□ Protection class: IP00, IP20 or IP23
□ Performance parameters: See parameter table above

1. Iron Core Structure
The iron core is made of formed amorphous alloy material with a three-phase three-column structure. It is suspended on the reinforced insulating plate above the coil, completely free from external force, giving full play to the advantages of amorphous alloy material: low no-load loss and low no-load current.

2. Coil & Insulation Performance
Both high and low voltage windings adopt rectangular coils, filled and wound with imported glass fiber mesh and tape inside and outside, and cured integrally with resin penetration. This structure provides extremely strong crack resistance and short-circuit resistance. The fully cast coil has strong moisture resistance and can be powered on immediately after installation.

3. Overall Structure
The transformer adopts a pusher-type clamp structure, with coils tightened by elastic pressure nails, resulting in a simple and beautiful overall structure. The high and low voltage windings are of thin-insulation, low-filler, fully cast type, with extremely strong moisture resistance, making it an immediate power-on transformer.

4. Casting Process & Quality Control
The product is cast with the latest German HEDRICH vacuum casting equipment, featuring advanced technologies such as vacuum thin film degassing, metering pump and static mixing, ensuring the proportioning accuracy and casting quality of epoxy mixture. The partial discharge of the winding is less than 5PC.

5. Heat Dissipation & Mechanical Strength
The HTC winding adopts advanced “air duct bar” technology, which is not limited by the winding curvature radius. Axial air ducts can be set at the heating center of the winding according to design requirements, achieving optimal heat dissipation for the whole machine. Multiple support ribs can be generated in the air duct to effectively enhance the mechanical strength of the winding.

Operating Condition

Condition Item	Specification
Altitude	≤ 1000m
Application Environment	Indoor use
Ambient Temperature	Max: 40℃; Min: -30℃; Daily average: 30℃
Relative Humidity	95% (25℃, daily average); 90% (25℃, monthly average)

Insulation Level

Voltage Class (kV)	Max Equipment Voltage (kV, rms)	Rated Short-time Power-frequency Withstand Voltage (kV, rms)	Rated Lightning Impulse Withstand Voltage (kV, peak)
≤1	≤1.1	3	20
3	3.6	10	40
6	7.2	20	60
10	12	35	75

Note: High voltage (kV): 11, 10.5, 10, 6.6, 6.3; Low voltage (kV): 0.4; Connection group: Dyn11; Insulation level: LI75AC35/L 10AC3

Technical Parameters

Unit: mm; Weight unit: kg

Rated Capacity (kVA)	P0 (W)	Pk (120℃) (kVA)	I0 (%)	Uk (%)	Overall Dimensions			Installation Dimensions	Main Unit Weight (kg)
Rated Capacity (kVA)						Length (L)	Width (B)	Height (H)	Horizontal × Vertical (a×b)
30	70	710	1.6	4	920	600	750	450550	600
50	90	1000	1.4		940	600	800	450550	730
80	120	1380	1.3		1000	600	870	450550	900
100	130	1570	1.2		1000	600	890	450550	1030
125	150	1850	1.1		1060	600	920	450550	1100
160	170	2130	1.1		1100	710	940	450660	1300
200	200	2530	1		1140	710	1000	450660	1420
250	230	2760	1		1200	710	1050	450660	1580
315	280	3470	0.9		1260	900	1080	550820	1800
400	310	3990	0.8		1320	900	1095	660820	2340
500	360	4880	0.8	6	1380	900	1200	660820	2600
630	410	5880	0.7		1460	900	1230	660820	2840
800	550	5960	0.7		1560	900	1250	820820	3350
1000	550	6960	0.6		1600	900	1300	820820	4020
1250	650	8130	0.6		1760	900	1440	820820	4250
1600	760	9690	0.6		1860	900	1530	820820	5500
2000	1000	11730	0.5		1860	900	1750	820820	6530
2500	1200	14450	0.5		2040	900	1930	820820	7540

Outline dimension & Install Dimension

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