2500kVA 12.47kv/415V-240V Pad Mounted Transformer American Type Transformer

• Phase: Three
• Core: Core-type Transformer
• Cooling Method: Oil-immersed Type Transformer
• Model NO.: ZGS
• Winding Type: Two-winding Transformer
• Certification: ISO9001-2000
• Usage: Combined Transformer, Power Transformer, Distribution Transformer
• Frequency Characteristics: Power Frequency
• Shape of Core: EE
• Brand: OEM
• Transport Package: Nake or Wooden Package
• Specification: 2500KVA
• Trademark: CHANGJI
• Origin: Shanghai, China
• HS Code: 8504349000
• Production Capacity: 200/Month

Product Description

Shanghai Changji Electric Co., Ltd. is a professional enterprise specializing in the production of various reactors, power transformers, dry-type transformers, amorphous alloy transformers, special transformers, and box-type substations.

Equipped with modern production facilities, advanced manufacturing processes, and comprehensive testing equipment, the company ensures the production of high-performance products featuring innovative designs, low losses, low temperature rise, low noise, high impact resistance, and strong short-circuit withstand capability.

Core Products: 10kV, 20kV, and 35kV dry-type and oil-immersed reactors

10kV, 20kV, and 35kV oil-immersed transformers

10kV, 20kV, and 35kV vacuum epoxy-cast dry-type transformers

10kV, 20kV, and 35kV non-encapsulated (SG) vacuum pressure-impregnated dry-type transformers

Box-type substations

Additionally, the company can design and manufacture various special transformers according to customer requirements.

For years, the company has adhered to a customer-first philosophy, earning trust and support through a strong commitment to product quality. By continuously improving quality management and pursuing excellence, Zhejiang Changji Electric Co., Ltd. Strives to secure its market position. With full enthusiasm, sincere cooperation, and a win-win business approach, we warmly welcome domestic and international customers to visit, inquire, and discuss potential collaborations!

Our 10 MVA oil transformer is a state - of - the - art electrical device designed to meet the diverse power distribution needs. With a capacity of 10 MVA (10000kVA), this oil - type transformer is a reliable workhorse in the power grid.

The 10 MVA oil transformer operates at a primary voltage of 23kV and a secondary voltage of 13,860V. Its connection group is Ynd11, which is a well - established and widely used configuration in the power industry. This connection group offers several advantages, such as providing a neutral point on the low - voltage side for single - phase loads and better protection against unbalanced loads.

One of the remarkable features of this 10 MVA oil transformer is its dual - frequency operation capability. It can operate at both 50Hz and 60Hz frequencies, making it highly adaptable to different power systems around the world. Whether you are in a region with a 50Hz power grid or a 60Hz one, this 10 MVA oil transformer will perform efficiently.

The oil - type design of the 10 MVA oil transformer is a key factor in its performance. The insulating oil not only provides excellent electrical insulation but also helps in dissipating heat generated during operation. This ensures that the transformer can run continuously without overheating, thereby extending its service life.Product Description of Oil Transformer
The oil transformer, a pivotal component in the power transmission and distribution system, offers outstanding performance and reliability. This product description will delve into its product performance, processing technology, materials, usage scope, and provide technical parameters following the IEC standards.
Product Performance
The oil transformer stands out with its remarkable performance. It has high - efficiency power conversion capabilities, minimizing energy losses during the transformation process. With excellent voltage regulation, it can maintain a stable output voltage even under varying load conditions. The oil within the transformer acts as an excellent coolant and insulator. It effectively dissipates heat generated during operation, ensuring that the transformer can work continuously without overheating. Moreover, the oil transformer has a high short - circuit withstand capacity, protecting the power system from potential damage caused by short - circuit faults.
Processing Technology
The manufacturing of the oil transformer involves advanced processing technologies. The core of the transformer is precisely laminated using high - quality silicon steel sheets. These sheets are cut with extreme precision to reduce eddy current losses. The winding process is carried out with great care. The coils are wound tightly and evenly, using advanced winding machines. After winding, the coils are impregnated with special insulating materials to enhance their insulation performance. The transformer tank is fabricated through a series of processes such as cutting, welding, and surface treatment. The welding seams are carefully inspected to ensure they are leak - proof, protecting the internal components from external contaminants.
Materials
High - quality materials are used in the construction of the oil transformer. The core is made of high - grade silicon steel, which has low magnetic hysteresis and high magnetic permeability, contributing to efficient magnetic coupling. The winding is typically made of copper or aluminum conductors. Copper offers excellent electrical conductivity and mechanical strength, while aluminum is lightweight and cost - effective. The insulating oil is a specially formulated mineral oil or synthetic oil with good dielectric properties, high flash point, and low pour point. The transformer tank is usually made of steel, which provides strong mechanical protection for the internal components.
Usage Scope
The oil transformer has a wide usage scope. It is commonly used in power generation plants to step up the voltage for long - distance transmission. In substations, it steps down the voltage to levels suitable for industrial, commercial, and residential use. It can also be found in large industrial complexes, providing power to various electrical equipment. In addition, oil transformers are used in renewable energy power plants, such as wind farms and solar power stations, to integrate the generated power into the grid.
 

 

Product Description of 35KV and Below Pad Mounted Transformer
1. Overview
Pad mounted transformers are an essential part of the electrical distribution system, especially for 35KV and below voltage levels. These transformers are designed to be installed on a concrete pad at ground - level, providing a reliable and efficient way to step down voltage for various applications.

The pad mounted transformer is a self - contained unit that encloses all the necessary components such as the core, windings, and protection devices within a rugged and weather - resistant enclosure. This design not only protects the internal components from environmental factors like rain, snow, and dust but also enhances safety by preventing unauthorized access.
2. Design and Construction
2.1 Core and Windings
The core of a 35KV and below pad mounted transformer is typically made of high - quality silicon steel laminations. These laminations are stacked together to form a low - reluctance magnetic path, which helps in reducing core losses and improving the overall efficiency of the transformer. The windings are carefully wound around the core using high - conductivity copper or aluminum conductors. The primary winding is connected to the high - voltage side (up to 35KV), while the secondary winding is connected to the low - voltage side, which can be adjusted according to the specific requirements of the end - user.
2.2 Enclosure
The enclosure of the pad mounted transformer is a crucial part of its design. It is usually made of heavy - gauge steel or fiberglass, providing excellent mechanical strength and corrosion resistance. The enclosure is designed with ventilation openings to allow for proper heat dissipation, ensuring that the transformer operates within a safe temperature range. Additionally, the enclosure is equipped with a locking mechanism to prevent unauthorized entry and protect the internal components from vandalism.
3. Performance Characteristics
3.1 Efficiency
Pad mounted transformers are known for their high efficiency. Through advanced design and manufacturing techniques, the losses in the core and windings are minimized, resulting in lower energy consumption. This not only reduces the operating costs for the end - user but also contributes to a more sustainable and environmentally friendly power distribution system.
3.2 Voltage Regulation
One of the key performance characteristics of a 35KV and below pad mounted transformer is its ability to maintain a stable output voltage. The transformer is equipped with tap changers that can be adjusted to compensate for variations in the input voltage, ensuring that the output voltage remains within the acceptable range for the connected loads.
3.3 Overload Capacity
Pad mounted transformers are designed to handle short - term overloads without significant damage. This is important in situations where there are sudden increases in the load demand, such as during peak hours or in the event of a fault in the electrical system. The transformer's ability to withstand overloads ensures the continuity of power supply to the connected loads.
4. Protection Features
4.1 Overcurrent Protection
The pad mounted transformer is equipped with overcurrent protection devices, such as fuses or circuit breakers. These devices are designed to detect excessive current flow in the transformer and automatically interrupt the circuit to prevent damage to the transformer and other connected equipment.
4.2 Overvoltage Protection
To protect the transformer from overvoltage conditions, surge arresters are installed. Surge arresters are designed to divert the high - voltage surges caused by lightning strikes or other transient events to the ground, preventing damage to the transformer's insulation and other internal components.
4.3 Temperature Protection
Temperature sensors are installed inside the transformer to monitor the temperature of the windings and the oil (if it is an oil - immersed transformer). If the temperature exceeds the safe operating limit, an alarm is triggered, and in some cases, the transformer may be automatically shut down to prevent overheating and damage.
5. Applications
35KV and below pad mounted transformers are widely used in various applications, including:

• Residential Areas: They are used to step down the voltage from the distribution network to a level suitable for household use, providing reliable power supply to homes and apartments.
• Commercial Buildings: In commercial buildings such as offices, shopping malls, and hotels, pad mounted transformers are used to meet the power requirements of various electrical equipment, including lighting, HVAC systems, and elevators.
• Industrial Facilities: For industrial facilities, these transformers can provide the necessary power for machinery and equipment, ensuring smooth and efficient operation of the production process.
  
  In conclusion, 35KV and below pad mounted transformers are reliable, efficient, and versatile electrical devices that play a vital role in the power distribution system. Their advanced design, performance characteristics, and protection features make them an ideal choice for a wide range of applications. Whether it is in a residential, commercial, or industrial setting, the pad mounted transformer provides a safe and stable power supply to meet the diverse needs of the end - users.
• ZSG11-2500/12.47-0.415 paded mounted transformer techincal data sheet

No.	Description	Unit	Guarantee
A	GENERAL
1	Manufacturing standards		IEC-60076
2	Type		ZSG11-2500/12.47-0.415
3	Rated Capacity	kVA	2500
4	a) On HV side
	Rated voltage:	kV	12.47
	Rated current:	A	115.75
	b)  On LV side
	Rated voltage:	kV	0.415
	Rated current:	A	3478.10
5	Rated frequency	Hz	50
6	Connection symbol		Dyn11
7	Short circuit impedance	%	5.5
8	Tapping method		ON-circuit-tap-changing(OLTC)
9	Tapping range		±2*2.5%
10	Maximum temperature rise at rated power:
	a)Maximum winding temperature rise	K	65
	b)Maximum oil Temperature rise	K	55
	c) Hot spot temperature	ºC	105
	d) Core and contruction rise	K	70
11	No load loss	kW	2.9
12	Load losses at 75 °C	kW	20.9
13	Total losses at 75°C	kW	23.96
14	Insulation level
	a) HV side	KV	105/45
	b) LV side	KV	5/0
15	Maximum flux density in Core	Tesla	1.55
16	Sound level (sound pressure level)	dB	63
17	Cooling		AN/ON
18	Permissible duration of occasional Overload	hrs.	60Min
	d) Level of Insulating material	Class	A
19	Thickness of Transformer Tank:
	a)material		cold-rolled plate
	b)Bottom	mm	8
	c)Sides	mm	6
	d)Corrugated wall or radiator	mm	2
20	Weights
	a. Net weight of insulating oil	liters	1200
	b. Weight of activepart	kgs	3100
	c. Weight of the largest shipping package	kgs	5090
21	Transformer dimensions including all fittings:
	a) Height	mm
	b) Breadth	mm
	c) Length	mm
22	Color of transformer		Green
	Accessories/Fittings supplied
2	Oil level Indicator	Yes/no	Y
3	Conservator with buchholz relay(Sixin)	Yes/no	Y
4	Pressure relieve device	yes/no	Y
5	Conservator	yes/no	N
6	Support lugs	Yes/no	Y
7	Lifting lugs	Yes/no	Y
8	Earthing terminals for tanks	Yes/no	Y
10	Rating plates	Yes/no	Y
11	Load switch	Yes/no	Y
12	Fuse	Yes/no	Y
B	SERVICE CONDITION
1	Altitude	Meters	≤2500
2	Temperatures	Degree	-45~+45 ºC
C	Incoming and outgoing line mode		incoming and outgoing from bottom by cable