Name: Single Phase Pole Mounted Transformer ANSI/IEEE Standard
Brand: Seatrust
Availability: InStock
Rating: 4.7 (38 reviews)

Question 1

What capacity ranges are available for single phase pole mounted transformers?

Accepted Answer

Our single phase pole mounted transformers are available in capacity ranges from 15kVA to 500kVA. Common sizes include 15, 25, 37.5, 50, 75, 100, 167, 250, 333, and 500 kVA. The selection depends on the load requirements of your distribution network. Smaller capacities (15-50kVA) are ideal for residential areas, while larger capacities (250-500kVA) are suitable for light industrial and large commercial applications.

Question 2

What are the primary and secondary voltage options?

Accepted Answer

Primary voltages are available in 25 kV or 34.5 kV configurations to match your utility distribution voltage. Secondary voltages include 120/240V for residential applications and 480V for commercial/industrial loads. The transformer features ±2×2.5% voltage taps on the high voltage side, allowing for voltage adjustment to compensate for line voltage drop or varying load conditions.

Question 3

What ANSI/IEEE standards do these transformers comply with?

Accepted Answer

Our single phase pole mounted transformers are designed and tested in accordance with IEEE C57.12.00 (General Requirements), IEEE C57.12.20 (Overhead-Type), IEEE C57.12.31 (Pole-Mounted), IEEE C57.12.35 (Vacuum Pressure Impregnated), IEEE C57.12.90 (Test Code), IEEE C57.91 (Loading Guide), and IEEE C57.154 (Liquid-Immersed). They are also UL/CSA listed for North American markets.

Question 4

What cooling methods are used in these transformers?

Accepted Answer

These transformers use oil-immersed cooling with ONAN (Oil Natural Air Natural) or KNAN (Forced Air Natural) cooling classes. ONAN cooling relies on natural convection of oil and air for heat dissipation, suitable for most applications. KNAN cooling adds forced air circulation for enhanced cooling capacity in high-load or high-ambient temperature environments. Both methods ensure reliable thermal management and long service life.

Question 5

What protective features are included?

Accepted Answer

Standard protective features include surge arresters for lightning protection, current limiting fuses on the primary side, protective links, pressure relief valves, and low voltage circuit breakers. Optional features include internal fault detectors (IFD), secondary circuit breakers, and lightning arresters. These protection devices ensure safe operation and minimize damage from fault conditions, extending transformer life and improving system reliability.

Question 6

What is the typical installation method?

Accepted Answer

Single phase pole mounted transformers are designed for overhead installation on utility poles. The transformer tank includes lifting lugs for safe handling and mounting brackets for secure pole attachment. Installation typically involves hoisting the transformer onto the pole using appropriate lifting equipment, securing it with mounting hardware, and connecting primary and secondary cables. The compact design and standardized mounting provisions ensure quick and safe installation by utility crews.

Question 7

What maintenance is required for pole mounted transformers?

Accepted Answer

Routine maintenance includes periodic visual inspection for oil leaks, checking oil level and color, inspecting bushings and connections for damage or corrosion, and verifying proper operation of protective devices. Oil sampling and testing should be performed every 3-5 years to assess insulation condition. The sealed tank design minimizes maintenance requirements. With proper installation and periodic inspection, these transformers can provide 30+ years of reliable service with minimal maintenance.

Question 8

Can these transformers be used in harsh environmental conditions?

Accepted Answer

Yes, our pole mounted transformers are designed for outdoor installation and can withstand harsh environmental conditions. The sealed tank construction protects internal components from moisture, dust, and contaminants. Optional features include stainless steel tanks for corrosive environments, environmentally friendly FR3 oil for enhanced fire safety, and special coatings for coastal or industrial atmospheres. Temperature rise ratings of 55°C or 65°C accommodate various ambient temperature conditions.

Specification	Value
Sizes (kVA)	15, 25, 37.5, 50, 75, 100, 167, 250, 333, 500
Frequency	60 Hz or 50 Hz
Cooling Class	ONAN or KNAN
Temperature Rise	55°C, 65°C, 55/65°C
Primary Voltages	25 kV or 34.5 kV
Secondary Voltage	120/240/480 V
Tapping Range	±2 × 2.5% on HV-Side
Impedance	1.5 – 6.0 %
Efficiency	DOE Efficiency Standard

Single Phase Pole Mounted Transformer

Product Features & Advantages

High Efficiency

Reliable Protection

Flexible Tapping

Easy Installation

Technical Specifications

Standards Compliance

Frequently Asked Questions

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