30-2500kVA Three Phase Pad Mounted Substation Pre-Installed Box-Type Transformer for Solar Power Project

Product Description

Brief introduction

A transformer is a static electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. Its main function is to change the voltage level of an alternating current (AC) supply, either increasing it (step-up) or decreasing it (step-down), while keeping the power (minus small losses) nearly constant.

Here is an introduction to transformers, including their main types and applications.
Basic Principle

Transformers operate on Faraday's Law of Induction. A time-varying current in the primary winding creates a changing magnetic flux in the iron core, which induces a voltage in the secondary winding. The ratio of the primary voltage (\(V_p\)) to the secondary voltage (\(V_s\)) is directly proportional to the ratio of the number of turns in their coils (\(N_p\) and \(N_s\)).

Transformer Types

Transformers can be classified in several ways. The most common classifications are based on function, application, and cooling method.

1. Classification by Function
Step-up Transformers: Increase voltage from primary to secondary (more turns in the secondary). Used at power stations to boost generator voltage for efficient long-distance transmission.
Step-down Transformers: Decrease voltage from primary to secondary (fewer turns in the secondary). Used at substations to lower transmission voltage for distribution, and in countless devices to supply safe, low voltage for electronics.
Isolation Transformers: Have a 1:1 turns ratio. They do not change voltage but provide electrical isolation between circuits for safety, breaking ground loops and protecting against faults.

2. Classification by Application
Power Transformers: The largest type, used in transmission networks at high voltages (33 kV and above) to handle bulk power. They are designed for maximum efficiency at or near full load.
Distribution Transformers: Used in the final stage of the power grid to step down voltage from distribution lines (e.g., 11 kV) to the level used by consumers (e.g., 230 V). They are designed for high efficiency across a variable load, as they operate 24/7.
Instrument Transformers: Used for measurement and protection, they safely scale down high currents and voltages to standardized, safe levels for meters and relays.
Current Transformers (CTs): Produce a secondary current proportional to the primary current (e.g., 5 A or 1 A).
Potential Transformers (PTs/VTs): Produce a secondary voltage proportional to the primary voltage (e.g., 120 V or 110 V).
Autotransformers: Use a single, continuous winding with taps along its length for voltage adjustment. They are more compact and economical than two-winding transformers but do not provide electrical isolation.

3. Classification by Core & Cooling
Core-Type vs. Shell-Type: In a core-type transformer, the windings surround the core; in a shell-type, the core surrounds the windings. Shell-type provides better mechanical support and lower leakage flux.

Oil-Immersed Transformers: The core and windings are submerged in mineral oil, which provides both insulation and cooling. Common in utility and high-power applications due to their high efficiency and overload tolerance.
Dry-Type Transformers: Use air for cooling and solid insulation (like epoxy resin). They are safer for indoor use (e.g., in buildings, hospitals, and offshore platforms) due to lower fire risk.

Key Uses and Applications
Transformers are essential components in virtually every part of the electrical grid and in most electronic devices.

Power Transmission: They step up generator voltage for long-distance transmission over high-voltage lines, significantly reducing energy loss as heat (since power loss \(I^2R\) is minimized by reducing current). They then step it down for safe use in homes and businesses.
Consumer Electronics: Used as power supplies to reduce mains voltage to the low-voltage DC required by devices like laptops, phone chargers, and televisions.

Industrial & Commercial: Distribution transformers provide power for factories and office buildings. Control power transformers supply low voltage for relays and control circuits in industrial equipment.
Measurement and Safety: Instrument transformers allow for the safe monitoring and control of high-power systems. Isolation transformers protect sensitive equipment and users from electrical shock.

Parameter List

Rated Power(KVA)	Rated Voltage		Loss(W)		On Load Current	Oil weight	Total weight	Dimension(L*W*H)
	H.V (KV)	L.V(V)	No Load	On Load		KGS	KGS
30			100	600	2.1	75	305	750*500*990
	3.3	380
		400
50	6	415	130	870	2	80	405	800*480*1030
63	6.3	433	150	1040	1.9	95	455	830*615*1060
100	6.6	440	200	1500	1.8	120	530	890*645*1145
125	10		240	1800	1.7	130	670	910*600*1185
160	11		280	2200	1.6	140	810	910*700*1280
200	13.2		340	2600	1.5	160	890	1000*760*1240
250	13.8		400	3050	1.4	175	1020	1285*730*1290
300	15		400	3450	1.4	185	1170	1280*740*1385
400	20		570	4300	1.3	215	1410	1310*750*1432
500	22		680	5100	1.2	260	1645	1365*765*1540
630	24		810	6200	1.1	310	2070	1485*815*1615
800	30		980	7500	1	370	2455	1640*930*1590
1000	33		1150	10300	1	425	2800	1860*1120*1630
1250	35		1360	12000	0.9	480	3320	1860*1120*1830
1600	36		1640	14500	0.8	550	4175	1975*1175*1900

ACTUAL CASES WIDELY USED
Product application scenarios are diverse and widely applicable tovarious occasions

Packing & Shipment solutions

Company Profile

Haheen Electric established in August 2020, is located in the Suzhou Industrial Park, Jiangsu Province. It is a high-tech enterprise specializing in the manufacture, research and development, and sales of electric power and new energy equipment. Our company focuses on producing a series of products including intelligent high and low voltage switch components, complete power equipment, photovoltaic, energy storage, and charging equipment. It possesses mature technology and a full set of modern production, processing, and testing equipment. The company covers an area of 80 miles with a building area of 120,000 square meters, capable of meeting the annual production demand for 20,000 intelligent power equipment units.

Adhering to the business philosophy of "dedication, unity, craftsmanship in manufacturing, scientific innovation, and harmonious win-win", the company always places scientific innovation at the core of its development. It actively introduces R&D technical talents and collaborates with multiple universities to establish a science and technology research and development center and a comprehensive energy research institute. The company has passed certifications such as ISO9001, ISO14001, and OHSAS18001, and all its series of products have passed the "CQC" certification by the China Quality Center. Our company continuously innovates and reforms, developing products and services that meet the needs of the national power grid's development.

In the future, Haheen Electric will continue to uphold its mission of "empowering healthy development and enabling a beautiful world," practicing the core values of "humanity-centered and balancing righteousness and interests," striving to become a leading manufacturer of electric power and new energy equipment.