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35KV Oil Immersed Transformer

Type: Oil Immersed Transformer/ Oil Filled Transformer Phase: Three-phase Voltage Range: 35kV-38.5kV Vector Group: Yyn0; Dyn11

Classification:

35KV and above series

Keywords

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Number:

d002

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隐藏域元素占位

Field of application

Residence

Industry and commerce

Energy Storage

Photovoltaic power generation

Metal melting

State Grid

Product Introduction

35kV oil-immersed transformer (also known as oil filled transformer) is widely used in medium to high-voltage electrical systems for stepping up or stepping down voltage levels. It is typically installed in power distribution networks, substations, or industrial facilities. The term "35kV" refers to its rated high-voltage capacity, making it suitable for handling substantial electrical loads and ensuring efficient energy transmission over long distances.

Features

Advantage
The 35kV series transformers have the advantages of low loss, low noise, strong lightning protection and anti-sudden short circuit capability, and beautiful appearance.
Remote function
The transformer has four remote functions of "remote signaling, remote measurement, remote adjustment, and remote control", which can be remotely controlled by a computer to realize unmanned substation operation.
Oil-immersed/filled designz
The winding and core of the transformer are immersed in insulating oil. This design can effectively improve the heat dissipation performance of the transformer and ensure that the transformer can operate stably in a high temperature environment.
Winding structure
Multi-layer cylindrical or continuous windings are usually used to increase the mechanical strength and electrical performance of the windings.
Core structure
The core is the magnetic circuit part of the transformer, which is generally made of high-quality cold-rolled silicon steel sheets stacked to reduce magnetic flux loss and no-load current.

Technical Specification

Model	Rated power (kVA)	Rated primary voltage (kV)	Tapping(%)	Rated secondary voltage (no-load) (kV)	Vector group	No-load losses (W)	No-load current (%)	Rated impedance (%)
S13-M-30	30	6/6.3/10/10.5	±2*2.5 ±5	0.4	Yyn0 Dyn11	80	2.3	4
S13-M-100	100	6/6.3/10/10.5	±2*2.5 ±5	0.4	Yyn0 Dyn11	150	1.8	4
S13-M-200	200	6/6.3/10/10.5	±2*2.5 ±5	0.4	Yyn0 Dyn11	240	1.5	4
S13-M-400	400	6/6.3/10/10.5	±2*2.5 ±5	0.4	Yyn0 Dyn11	410	1.3	4
S13-M-500	500	6/6.3/10/10.5	±2*2.5 ±5	0.4	Yyn0 Dyn11	480	1.2	4
S13-M-800	800	6/6.3/10/10.5	±2*2.5 ±5	0.4	Yyn0 Dyn11	700	1.0	4.5
S13-M-1000	1000	6/6.3/10/10.5	±2*2.5 ±5	0.4	Yyn0 Dyn11	830	1.0	4.5
S13-M-1250	1250	6/6.3/10/10.5	±2*2.5 ±5	0.4	Yyn0 Dyn11	970	0.9	4.5
S13-M-1600	1600	6/6.3/10/10.5	±2*2.5 ±5	0.4	Yyn0 Dyn11	1170	0.8	4.5
S13-M-2000	2000	6/6.3/10/10.5	±2*2.5 ±5	0.4	Yyn0 Dyn11	1510	0.8	Customized
S13-M-2500	2500	±2*2.5 ±5	0.4	0.4	Yyn0 Dyn11	1780	0.7	Customized
S13-M-3150	3150	±2*2.5 ±5	0.4	0.4	Yyn0 Dyn11	2100	0.7	Customized

Configurations

1	Oil filter valve	17	Oil drain valve
2	Conservator	18	Jacking boss
3	Buchholz relay	19	Stopper
4	Oil filter valve	20	Foundation bolt
5	Pressure-relief vent	21	Grounding terminal
6	High-voltage bushing	22	Skid base
7	Low-voltage bushing	23	Coil
8	Suspension lug	24	Coil pressure plate
9	B C T Terminal	25	Core
10	Tank	26	Terminal box for protective devices
11	De-energized tap changer	27	Rating plate
12	Tap changer handle	28	Dial thermometer
13	Fastener for core and coil	29	Radiator
14	Lifting hook for core and coil	30	Manhole
15	End frame	31	Lifting lug
16	Coil pressure bolt	32	Dial type oil level gauge

Production Process

FAQ

Q: How safe are oil-immersed transformers, particularly regarding fire risk?

A: Modern designs ensure safety. They use fire-resistant insulating oils (e.g., mineral oil meeting IEC 60296 or biodegradable ester fluids) within robust, sealed tanks. Pressure relief devices activate safely during internal faults, and designs comply with strict international safety standards (IEC).

Q: Is oil leakage a concern, and what maintenance is required?

A: Our transformers feature fully sealed construction (e.g., corrugated tanks or welded conservator tanks), minimizing leakage risk. High-quality insulating oil maintains stable chemical properties under normal operation. Maintenance primarily involves periodic oil sampling/testing and condition monitoring, reducing long-term upkeep.

Q: How are oil-immersed transformers protected during shipping?

A: We provide export-grade packaging: robust wooden crates, internal bracing/shock absorption, oil level monitoring, pressure gauge protection, and desiccants. Detailed transport and handling instructions ensure secure delivery.

Q: Are special foundations or space requirements needed for installation?

A: A level, robust foundation is essential to support the weight and minimize vibration. We supply precise dimensional drawings, foundation specifications, required clearances (safety zones), and ventilation guidelines for proper site preparation and installation.