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1250 KVA Transformer

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Features

The 1250 kVA transformer specification include its rated voltage, current, frequency, and efficiency. The transformer is designed to operate at a rated voltage of 11kV or 33kV in the primary winding and 415V in the secondary winding. 1250 kVA transformer current rating is 1574A at a frequency of 50Hz or 60Hz. The transformer's efficiency is usually between 95-98%, depending on the load.

DESCRIPTION	RATINGS
Manufacturer	ZHONGYI
Country of manufacturing	Hebei Province, China
Rated Power	1250 kVA
Cooling Method	ONAN
Vector Group	Dyn11
Rated frequency	50 Hz
Rated Primary Voltage (Uo)	33 kV rms
Insulation voltages (Primary Side) Rated Voltage (Ur) Power frequency withstand (Up) for 1minute Impulse Withstand Voltage (Ud)	≥36kV rms ≥70kV rms ≥ 170kV peak
Off-circuit Tap Changer Tap steps Tap Positions	5 steps 2.5% taps -5%, -2.5%, 0, +2.5%, +5%
Secondary voltage at no load: Between phases: Phase to neutral:	400 V rms 230 V rms
Secondary Insulation Level	1000 V rms
Transformer losses No-load Loss Full Load loss	≤1825W ≤12430W
1250 kVA Transformer Full Load Current	1574A
Full load efficiency (@100% load, 0.8PF)	≥ 98.5%
Voltage regulation	≥ 4.75%
1250 kVA Transformer Impedance Voltage	6.5 %
Site Altitude	2000 m
HV winding Insulation class LV winding insulation class	A (105 °C) A (105 °C)
Temperature rise Windings Oil Top	60 °C 55 °C
1250 kVA Transformer Dimensions Overall Length Overall Width Overall Height	≤ 2100 mm ≤ 1300 mm ≤ 2500 mm
1250 kVA Transformer Oil Capacity	550kg
1250 kVA Transformer Weight	≤4500 kg

The transformer is made up of three main components, including the core, windings, and tank. The core is made of thin laminated steel sheets that are stacked and insulated to reduce energy losses through eddy currents and hysteresis. The windings are made up of copper conductors that carry the current and are insulated to prevent electric arcs. The tank is constructed with either steel or aluminum and houses the core and windings. It is filled with insulating oil that helps to dissipate heat generated during operation.

1250 kVA Transformer Cover

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1250 kVA Transformer pressure relief valve

The 1250 kVA transformer is a reliable and efficient electrical equipment that provides a stable source of power to different applications. It is commonly used in industrial applications such as motor control centers, pumps, fans, compressors, and lighting systems. Its ability to handle high energy loads makes it ideal for use in sub-stations and distribution networks. The transformer is easy to install, operate, and maintain, and it is designed to last for many years.

In conclusion, the 1250 kVA transformer is an important electrical equipment that plays a crucial role in the generation, transmission, and distribution of electrical power. Its high efficiency, reliability, and durability make it a preferred choice for different applications. As technology advances, new features such as smart monitoring and control systems are being added to transformers to improve their performance and reduce energy losses.

1250 kVA Transformer Packaging:

1250 kVA Transformer packaging