Table of Contents
1. What is a single-pole transformer substation?
A single-pole transformer substation is a static electromagnetic device that operates on the principle of electromagnetic induction, capable of changing voltage while maintaining the frequency of the alternating current system. This new type of compact single-pole substation is a substation where the transformer is installed on a single pole made of centrifugal concrete or a single steel pole.
2.Applications of Single-Pole Transformer Substations
Single-pole transformer substations are widely used in urban and rural power distribution, industrial facilities, commercial zones, construction sites, and renewable energy projects, offering a compact, reliable, and cost-effective solution.
3. Structure of a Single-Pole Transformer Substation:
Pole: Made of centrifugal concrete or steel, supporting the entire substation.
Transformer: Mounted on the pole, for voltage step-up or step-down.
High Voltage Equipment: Includes disconnect switch, drop-out fuse, and lightning arrester for incoming line and protection.
Low Voltage Equipment: Switches, distribution box, and terminals for power distribution.
Earthing System: Ensures operational and personnel safety.
Accessories: Lifting lugs, protective covers, nameplate, and optional metering devices.
4.Specifications of the single-pole transformer substation:
Capacity: 25–400 kVA
Voltage: HV up to 33 kV, LV 0.4 kV
Frequency: 50 / 60 Hz
Transformer: Oil-immersed (standard), Dry-type (optional)
Cooling: ONAN / AN
Pole: Centrifugal concrete or steel
Protection: Lightning arrester, fuse/circuit breaker
Standard: IEC / ANSI compliant