Single Phase Pad-mounted Transformer

Overview of Single Phase Pad-mounted Transformer

Single Phase Pad-mounted Transformer is an enclosed, ground-level electrical distribution transformer commonly used in underground (UG) power systems. It steps down primary high-voltage electricity (e.g., 15kV or 25kV) to a lower secondary voltage (e.g., 120/240V or 480V) for safe distribution to residential neighborhoods, commercial buildings, and industrial parks. Its robust, lockable steel enclosure makes it safe for public areas.

Features of Single Phase Pad-mounted Transformer

Ground-Level Enclosure: A locked, tamper-resistant, weatherproof steel cabinet that protects the internal components and ensures public safety.

Underground Cable Connections: Designed for easy connection to underground primary (high-voltage) and secondary (low-voltage) cables via compartments with built-in bushings.

Compartmentalization: Separate, isolated compartments for high-voltage and low-voltage components, enhancing safety during maintenance.

Ventilation: Designed with louvers or other ventilation systems to allow for proper heat dissipation from the transformer core and coils.

Lifting Lugs: Integrated lifting lugs for easy and safe installation and replacement using a crane or hoist.

Tamper-proof Hardware: Lockable doors with special bolts to prevent unauthorized access.

Fused Switches: Often includes fused disconnect switches for circuit protection and safe isolation.

Pad Foundation: Installed on a concrete pad (“pad-mounted”) to provide a stable, level base.

Specifications of Single Phase Pad-mounted Transformer

Here’s the product content about Single Phase Pad-Mounted Transformer specifications:

This transformer steps down voltage for homes and businesses. It sits on a concrete pad near where power is needed. You see these green metal boxes in neighborhoods. They connect directly to underground power lines.

The enclosure is tough steel. It protects everything inside. The box is tamper-proof. Workers need special tools to open it. Safety is a priority. The case holds insulating oil. It contains leaks if they happen. The design prevents oil spills.

Voltage ratings are standard. The primary side handles high voltage, like 7620 or 14400 volts. The secondary side gives low voltage, usually 120/240 volts for homes. Different kVA sizes are available. Common options are 25kVA, 37.5kVA, 50kVA, 75kVA, and 100kVA. Choose the size matching your power load.

Cooling uses oil and air. The oil circulates naturally around the core and coils. Air flows over the outside tank. This keeps the transformer running cool. The design is called ONAN.

Basic Impulse Level (BIL) is important. It measures protection against lightning strikes. Standard BIL ratings are 95kV or 110kV. Higher BIL gives better surge protection.

Impedance is a key number. It affects voltage drop under load. Common impedance values are around 2% or 4%. The utility decides the best impedance for their system.

Internal parts are robust. The core uses grain-oriented electrical steel. Copper or aluminum windings conduct the current. The bushings connect the underground cables. They are designed for reliability. Accessories include pressure relief devices and gauges. These monitor the oil and temperature.

The unit meets industry standards. It follows ANSI and IEEE rules. This ensures safety and performance. Installation follows local utility requirements. Maintenance is low. The transformer is built to last many years. Efficiency levels are good. They minimize energy losses during operation.

Applications of Single Phase Pad-mounted Transformer

Single phase pad-mounted transformers deliver power where you need it. They sit on concrete pads at ground level. This makes them easy to install and access. You see them everywhere electricity flows directly to homes and businesses. Their main job is stepping down higher voltage from power lines. They provide the safe, usable voltage for everyday things.

These transformers are perfect for residential neighborhoods. They power individual houses or small groups of homes. Placing them near the houses they serve cuts down on long, expensive low-voltage wiring runs. This saves money. It also makes the power more reliable for the people living there. Their compact, enclosed design fits well in yards or near sidewalks. They don’t take up much space. They are tough too, handling weather and minor bumps.

Commercial areas use them widely. They supply power to shops, small offices, and restaurants. Putting the transformer close to the building it feeds is efficient. This reduces voltage drop over the wires. Equipment works better. Pad-mounted units are also common for streetlights. They power the lights reliably. Their location makes maintenance simple for utility crews. Workers can service them quickly without major digging or traffic disruption.

Rural settings benefit greatly from these transformers. They bring power to farms, remote homes, and small facilities far from main lines. Running high voltage long distances is cost-effective. Then the pad-mount transformer steps it down right where the power is used. This approach is practical for scattered loads. The enclosure protects the transformer from animals and weather. This is vital in exposed locations.

Their sealed tank design is key. It keeps the internal parts safe from dirt, water, and animals. This prevents many failures. They require little upkeep. The lockable cabinet stops unauthorized access. This protects people and the equipment. The low profile keeps them out of sight. They blend into the surroundings. Utilities choose them for safety, reliability, and low operating costs.

Company Profile

PDDN Photoelectron Technology Co., Ltd. is one of the leading enterprises in power electronics technology and power products, which is fully involved in developing solar inverters， transformers, voltage regulators, distribution cabinets, thyristors， modules， diodes， heaters, and other electronic devices or semiconductors. We will be committed to providing users with high-quality, efficient products and considerate service.

It accepts payment via Credit Card, T/T, West Union, and Paypal. PDDN will ship the goods to customers overseas through FedEx, DHL, by sea, or by air. If you want high-quality Single Phase Pad-mounted Transformer, please send us inquiries; we will be here to help you.

Payment Methods

L/C, T/T, Western Union, Paypal, Credit Card etc.

Shipment

By sea, by air, by express, as customers request.

Storage Conditions

1) Store in a dry environment at room temperature.

2) Avoid damp and high temperature.

3) Use immediately after opening the inner packing bag.

5 FAQs of Single Phase Pad-mounted Transformer

What is a single-phase pad-mounted transformer?
It’s an electrical device. It changes high voltage to lower voltage. This lower voltage powers homes and small businesses. The transformer sits on a concrete pad outside. It’s enclosed in a metal cabinet. This protects the internal parts.

Where is this transformer used?
You see it in neighborhoods. It feeds power directly to houses. It’s common where power lines run underground. The transformer connects to underground wires. It sits near property lines or sidewalks. It’s easy for utility workers to access.

Is it safe around people?
Yes, safety is a big focus. The live electrical parts are locked inside the cabinet. The doors need special tools to open. Warning signs are clearly visible. The cabinet is tough steel. It withstands weather and tampering. This keeps the public safe.

How is it installed?
Installation needs careful planning. A concrete pad is poured first. The transformer sits firmly on this pad. Underground cables connect to it. The area must be clear for workers and ventilation. Proper grounding is essential. This prevents electrical hazards. Always follow local utility rules.

What maintenance is required?
These transformers need regular checks. Utility workers inspect the outside. They look for damage, leaks, or rust. They check connections and warning labels. Oil levels and quality are tested inside. Only trained professionals should service it. Don’t try to open it yourself. Call the power company if you see problems.