Oil-Immersed Transformer

Products Categories

Single-phase cylindrical oil-immersed transform...

Zero-occupancy three-phase oil-immersed undergr...

Noise-free sealed underground S-Series transformer

SGB Series H-Class Low-Noise High-Overload Envi...

SBH - Hermetically Sealed Maintenance-Free Oil-...

SCB11 Series Epoxy Resin Cast Dry-Type Transfor...

SCB11 Series 10kV Three Phase Dry-type Power Tr...

35kv Three-Phase Oil-Immersed Transformer

Three-Phase Oil-Immersed Underground Transformer

S11 Series 10kV Three Phase Oil Immersed Power ...

35kv Three-Phase Oil-Immersed Transformer01.jpg

35kv Three-Phase Oil-Immersed Transformer02.jpg

35kv Three-Phase Oil-Immersed Transformer03.jpg

35kv Three-Phase Oil-Immersed Transformer

SZ11/13/20/22-M Series

Product Overview
The 35kV Series power transformers incorporate advanced design principles with substantial improvements in materials, structural engineering, and manufacturing processes. The high/low-voltage clamping frames utilize steel straps combined with top and side beams to form a rigid frame structure, significantly enhancing core compression force and transportation impact resistance. These units deliver:
• Enhanced short-circuit withstand capacity
• Superior operational reliability with reduced losses
• Noise levels below industry standards
• Aesthetic industrial design
Performance benchmarks align with leading international equivalents in this class.

product details

Model Definition

Features

● Safe, Fireproof & Pollution-Free: Direct operation at load centers.

● High Mechanical Strength: Withstands short-circuits, minimizes partial discharges, ensures thermal stability, and extends service life.

● Efficient Cooling: Capable of overload operation with forced air cooling.

● Robust Surface Treatment: Degreased, derusted, sandblasted, and painted for superior moisture resistance, ideal for metallurgy, petrochemical, and humid/polluted environments.

● Eco-Friendly: Flame-retardant, explosion-proof, and maintenance-free.

● Compact & Lightweight: Easy transportation and installation.

● Secure Positioning: Fixed core-tank structure prevents displacement during transit and ensures long-term operational stability.

● High-Efficiency Core: Uses premium low-loss silicon steel laminations with multi-step mitered joints to reduce no-load losses and noise. Coils utilize paper-wrapped or self-adhesive transposed conductors to minimize load losses, lowering grid and user operating costs.

Range of application

It is suitable for important locations with special fireproof requirements, such as commercial buildings, high-rise structures, airports, industrial and mining enterprises, power plants, oil platforms, subways, and tunnels. It can also be combined with switchgear to form prefabricated substations.

Technical specifications

Off-load tap-changing type

Rated capacity (kVA)	Rated voltage			Vector group	No-load loss (W)				Load loss (W)				Impedance voltage (%)
Rated capacity (kVA)	HV (kV)	Tapping range (%)	LV (kV)	Vector group	11#	13#	20#	22#	11#	13#	20#	22#	Impedance voltage (%)
3150	35 38.5	±5 or ±2X2.5	3.15 6.3 10	Dyn11 or Yd11 or YNd11	3040	2400	2000	1700	23000	21900	20700	20700	7
4000					3610	2900	2300	2000	27300	25900	24600	24600
5000					4320	3500	2800	2400	31300	29700	28200	28200
6300					5240	4200	3400	2900	35000	33300	31500	31500	8
8000					7200	5800	4700	4000	38400	36500	34600	34600
10000					8700	7000	5700	4800	45300	43000	40800	40800
12500					10000	8000	6500	5500	53800	51100	48400	48400
16000					12100	9700	7900	6700	65800	62500	59200	59200
20000					14400	11500	9400	7900	79500	75500	71600	71600
25000					17000	13600	11100	9400	94000	89300	84600	84600	10
31500					20200	16200	13100	11100	112000	106400	100800	100800	10

On-load tap-changing type

Rated capacity (kVA)	Rated voltage			Vector group	No-load loss (W)				Load loss (W)				Impedance voltage (%)
Rated capacity (kVA)	HV (kV)	Tapping range (%)	LV (kV)	Vector group	11#	13#	20#	22#	11#	13#	20#	22#	Impedance voltage (%)
3150	35 38.5	±5 or ±2X2.5	3.15 6.3 10	Dyn11 or Yd11 or YNd11	3230	2600	2100	1800	24700	23500	22200	22200	7
4000					3870	3100	2500	2100	29100	27600	26200	26200
5000					4640	3700	3000	2600	34200	32500	30800	30800
6300					5630	4500	3700	3100	36700	34900	33000	33000	8
8000					7870	6300	5100	4300	40600	38600	36500	36500
10000					9280	7400	6000	5100	48000	45600	43200	43200
12500					10900	8700	7100	6000	56800	54000	51100	51100
16000					13100	10500	8500	7200	70300	66800	63300	63300
20000					15500	12400	10100	8500	82700	78600	74400	74400
25000					18300	14600	11900	10100	97800	92900	88000	88000	10
31500					21800	17400	14200	12000	116000	110200	104400	104400	10

Note: The above data is subject to change due to technical improvement.

Single-phase cylindrical oil-immersed transform...

Zero-occupancy three-phase oil-immersed undergr...

Noise-free sealed underground S-Series transformer

SGB Series H-Class Low-Noise High-Overload Envi...

SBH - Hermetically Sealed Maintenance-Free Oil-...

SCB11 Series Epoxy Resin Cast Dry-Type Transfor...

SCB11 Series 10kV Three Phase Dry-type Power Tr...

35kv Three-Phase Oil-Immersed Transformer

Three-Phase Oil-Immersed Underground Transformer

S11 Series 10kV Three Phase Oil Immersed Power ...

35kv Three-Phase Oil-Immersed Transformer

Model Definition

Features

Range of application

Technical specifications

Leave Your Message

Single-phase cylindrical oil-immersed transformer 25kVA 50kVA - China Transformer

Three-Phase Oil-Immersed Underground Transformer

Outdoor Using Three Phase Oil Immersed Distribution Transformer

S20 SeriesHigh-Efficiency Oil Immersed Power Transformer 10kV

Single-Phase Oil-Immersed Transformer, Pole Mounted Transformer

SBH - Hermetically Sealed Maintenance-Free Oil-Immersed Power