Subway Tunnel 220v 380v to 460v 660v Step-Up Transformer

Outdoor 3kva 400kva 630kva Subway Tunnel 220v to 460v Step-Up Transformer

The step-up transformer solves the problem of low voltage caused by low grid voltage/long line, which leads to excessive power of equipment and makes all equipment unable to start and use normally. It is suitable for factories, mines, roads, railways, tunnels, irrigation and other places with low voltage.

Performance and application

The 380V voltage output by the main transformer is increased to 1140V or 2200V required by the tunnel. The specific step-up amplitude depends on the wire diameter and tunnel length (1000m-3000m).
The high voltage in the tunnel (such as 1140V or 2200V) is converted to low voltage levels such as 410V, 430V, 450V suitable for equipment to ensure stable and reliable power supply.

Main technical parameter

Brand	ZHENGXI
Model	STK
Phase	Three phase
Input Voltage	3300V 1140V 660V 440V 380V 220V (Customized voltage can be customized)
Output Voltage	3300V 1200V 1140V 660V 480V 460V 440V 415V 400V 380V 220V(Customized voltage can be customized)
Voltage Regulation Accurac	±1%
Waveform Distortion	No distortion(compared to inputwaveform)
Voltage Change Rate	≤1.5%
Insulation Class	Class F, H class, HC class available (regular H class) temperature resistance 180 degrees
Work Efficiency	Auto-coupling≥99% inductive (isolated)≥95%
Frequency	50/60Hz
Connection Method	Y/Y、△/YO、 YO/△,Isolated,auto-coupled (optional)
Overload Capability	Allows more than 1.2 times rated load to work for4 hours (long-term full load
Temperature Rise	≤60°C
Dielectric Strength	3000VAC/1min
Working Environment	Temperature:-20~+45″C Humidity: < 95% RH does not condense
Safety Standard	VDE0550、IEC439、JB5555、GB226Products comply with international national standards such as VDE0550, IEC439JB5555.GB226
Shipping Instructions	The transformer is a custom model, generally it takes 7 working days to ship. If you need to work, please contact customer service.All specifications are produced according to national standards and the price is reasonable.

System composition and function

1. Efficient step-up and step-down function
High-voltage grid input: The initial voltage conversion from 10000V to 430V is achieved through the S11M-10/0.4 transformer.
Special step-up transformer for tunnel: 410V is stably increased to 1000V, and long-distance power supply is realized without step-up loss.
Step-down device at tunnel entrance: 1000V high voltage is reduced to 380V, 410V, and 440V to meet the needs of equipment in the tunnel.

2. Stable voltage regulation
Equipped with oil-immersed power regulator, the voltage is stabilized at 410V to adapt to the complex power consumption environment of the tunnel.
Equipped with low-voltage capacitor reactive compensation cabinet, it can effectively improve the power factor, reduce energy consumption, and improve power supply efficiency.

3. Power equipment support
Adapt to power equipment with a rated voltage of 380V in the tunnel, and provide efficient and reliable power support for various mechanical equipment.

Product advantages

Efficient and energy-saving: no loss in the step-up and step-down process, reliable operation, suitable for long-distance power supply.
Reliable performance: pure copper coil, durable structure, adapt to harsh environment, and provide long-term stable service.
Customized solution: transformers of different voltage levels and capacities can be designed according to user needs.

Application areas

Tunnels and subways: meet the needs of long-distance high-voltage power supply and support the operation of various power equipment in tunnels.
Industry and mining: improve power supply stability and solve the problem of insufficient voltage in remote areas.
Road and railway engineering: ensure continuous power supply for complex projects and improve construction efficiency.