Pole Mounted Transformer

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Product Overview

Pole Mounted Transformer

High-voltage rated voltage	Primary Side: 10kV, 11kV, 12.47kV, 13.8kV, 15kV, 20kV, 22kV, 24.94kV, 25kV, 33kV, 35kV
Low-voltage rated voltage	Secondary Side: 120V, 208V, 220V, 230V, 240V, 400V, 415V, 480V, 600V
Rated capacity	5kVA - 500kVA Common Ratings: 10kVA, 15kVA, 25kVA, 37.5kVA, 50kVA, 75kVA, 100kVA, 167kVA, 250kVA
Power Supply Mode	Pole Mounted Distribution Utility Distribution Network Residential Power Supply Commercial Power Supply
Frequency	50Hz 60Hz
Cooling Type	ONAN Oil Natural Air Natural Cooling
Fluid Type	Mineral Insulating Oil Natural Ester Fluid Optional

1. Basic Electrical Parameters

Parameter	Value	Parameter	Value
High-voltage rated voltage	Primary Side: 10kV, 11kV, 12.47kV, 13.8kV, 15kV, 20kV, 22kV, 24.94kV, 25kV, 33kV, 35kV	Low-voltage rated voltage	Secondary Side: 120V, 208V, 220V, 230V, 240V, 400V, 415V, 480V, 600V
Rated capacity	5kVA – 500kVA Common Ratings: 10kVA, 15kVA, 25kVA, 37.5kVA, 50kVA, 75kVA, 100kVA, 167kVA, 250kVA	Power Supply Mode	Pole Mounted Distribution Utility Distribution Network Residential Power Supply Commercial Power Supply
Frequency	50Hz 60Hz	Cooling Type	ONAN Oil Natural Air Natural Cooling
Fluid Type	Mineral Insulating Oil Natural Ester Fluid Optional	Transformer Type	Single-phase Pole Mounted Distribution Transformer Conventional Type Completely Self Protected (CSP) Type
Phase	Single Phase	Installation Type	Outdoor Pole Mounted Installation
Primary Voltage	High-voltage Input Side: 10kV – 35kV Class	Secondary Voltage	Low-voltage Output Side: 120V – 600V Class
Vector Group	According To System Connection Requirements	Impedance Voltage	According To Rated Capacity And Utility Requirements
Tap Range	Typically ±2 x 2.5% Customized Tap Range Available	Tap Changer Type	Off-circuit Tap Changer
Rated Current	Calculated According To Rated Capacity And Voltage Ratio	Voltage Regulation	Designed According To Distribution Network Requirements
No-load Loss	Low-loss Core Design Available CRGO Or Amorphous Core Option	Load Loss	Designed According To Capacity And Efficiency Requirements
Efficiency	High Efficiency Distribution Transformer Design	Temperature Rise	55°C Or 65°C Design Available

2. Core And Winding Design

Parameter	Value	Parameter	Value
Core Material	CRGO Silicon Steel Amorphous Metal Optional	Core Type	Wound Core Step-lap Core Construction
CRGO Core	Cold Rolled Grain Oriented Silicon Steel Core Low No-load Loss Design	Amorphous Metal Core	Optional High Efficiency Core Reduced Core Loss Performance
Core Manufacturing Process	Precision Cutting And Stacking Process Controlled Magnetic Flux Distribution	Core Loss Reduction	Optimized Core Joint Design Reduced No-load Loss
Magnetic Flux Density	Optimized Below Saturation Level For Reliable Operation	Core Clamping	Mechanical Core Clamping Structure For Vibration Resistance
Winding Material	Copper Aluminum Optional	Copper Winding	High Conductivity Copper Conductor
Aluminum Winding	Electrical Grade Aluminum Conductor	Winding Structure	Layer Winding Design Disc Winding According To Rating
Conductor Type	Round Or Shaped Electrical Conductor	Winding Insulation	Oil Impregnated Cellulose Insulation System
Interlayer Insulation	Electrical Insulation Paper And Pressboard	Interturn Insulation	Insulating Material Designed For Rated Voltage And Impulse Stress
Short Circuit Withstand	Designed To Withstand Electromagnetic Forces Under Short Circuit Conditions	Insulation System	Oil Paper Insulation System Class A Insulation
Insulation Material	Transformer Oil Insulation Paper Pressboard Components	Winding Temperature Control	Designed According To Rated Load And Cooling Conditions

3. Oil System And Tank Structure

Parameter	Value	Parameter	Value
Oil System	Oil Immersed Transformer Design Provides Cooling And Electrical Insulation	Mineral Oil	Electrical Grade Mineral Insulating Oil High Dielectric Strength Transformer Oil
Ester Fluid	Natural Ester Fluid Optional High Fire Point Dielectric Fluid Available	Fluid Standards	According To Applicable Transformer Fluid Standards
Hermetically Sealed Tank	Fully Sealed Tank Structure Reduces Moisture And Oxygen Exposure	Tank Structure	Corrugated Steel Tank Design Sealed Steel Tank Construction
Tank Material	High Strength Steel Plate Corrosion Resistant Construction	Tank Coating	Outdoor Protective Coating System Weather Resistant Surface Treatment
Oil Expansion System	Sealed Oil Expansion Design Maintains Internal Pressure Balance	Pressure Relief Device	Optional Pressure Relief Valve Safety Pressure Protection
Oil Level Indicator	Optional Liquid Level Indicator	Drain Valve	Oil Drain And Sampling Valve Available
Transformer Cover	Bolted Or Welded Cover Design High Dielectric Strength Cover Insulation	Sealing System	Oil Resistant Gasket Sealing System

4. Protection System

Parameter	Value	Parameter	Value
CSP Type	Completely Self Protected Transformer Integrated Primary And Secondary Protection	Conventional Type	External Protection Devices Required Designed For Utility Distribution Systems
Lightning Arrester	High Voltage Surge Protection Optional External Or Internal Mounting	Fuse Protection	Primary Fuse Protection Available Current Limiting Fuse Optional
Circuit Breaker	Low Voltage Circuit Breaker Optional Secondary Protection Available	Overcurrent Protection	Protection Against Overload And Short Circuit Conditions
Surge Protection	Distribution Class Surge Protection Device Optional	Fault Protection	Designed For Reliable Fault Current Protection
Secondary Breaker	Available For Specific CSP Configurations	Primary Protection	High Voltage Fuse Or Weak Link Protection
Low Voltage Protection	Secondary Overload Protection Available	Safety Features	Designed For Safe Outdoor Distribution Operation

5. Mechanical And Installation

Parameter	Value	Parameter	Value
Pole Mounting Structure	Single Pole Or Double Pole Installation Utility Pole Mounted Design	Mounting Method	Outdoor Pole Mounting System
High-voltage Bushings	Outdoor Insulated High Voltage Bushings Designed For Distribution Networks	Low-voltage Bushings	Low Voltage Distribution Terminals Copper Or Aluminum Conductor Compatible
Bushing Configuration	Single Bushing Or Double Bushing Configuration Available	Terminal Material	Tin-plated Terminals Suitable For Copper And Aluminum Conductors
Pole Brackets	Heavy Duty Pole Mounting Brackets	Lifting Lugs	Reinforced Lifting Lugs For Transportation And Installation
Grounding Terminal	External Grounding Terminal Provided	Nameplate	Corrosion Resistant Stainless Steel Or Aluminum Nameplate
Enclosure Protection	Outdoor Weather Resistant Design	Installation Environment	Suitable For Utility Pole Distribution Applications
Transportation	Designed For Safe Transportation And Handling	Mechanical Strength	Designed To Withstand Transportation And Installation Loads
Dimensions	Customized According To Rated Capacity And Voltage Class	Weight	According To Transformer Rating And Configuration

Protection & Accessories

Reliable Protection System and Flexible Accessories

Our Pad Mounted Transformers are equipped with reliable protection devices and accessories to ensure safe operation in underground distribution systems and utility applications.

Standard Accessories

HV/LV Bushings

Reliable medium voltage connection with excellent insulation performance.

Oil Level Gauge

Easy monitoring of insulating oil level for maintenance.

Pressure Relief Device

Improves transformer safety under abnormal conditions.

Drain Valve

Convenient oil draining and maintenance operation.

Tap Changer

Off-circuit Tap Changer (OCTC), ±2 × 2.5%

Nameplate

Provides complete transformer rating and technical information.

Optional Accessories

Temperature Indicator

Monitors transformer operating temperature for reliability.

Remote Monitoring System

Supports smart grid and remote transformer condition monitoring.

Surge Arrester

Protects pad mounted transformers against lightning and voltage surges.

Key Features of Transformers

Key Benefits:

Enhanced operator and public safety
No exposed high-voltage components
Suitable for underground distribution systems
Reliable operation in outdoor environments

Key Benefits:

Weather-resistant construction
Corrosion-resistant surface treatment
Secure locking compartment
Suitable for public and utility applications

Key Benefits:

Space-saving installation
Low-profile outdoor design
Easy inspection and maintenance
Ideal alternative to overhead distribution systems

Available Configurations:

Loop feed distribution system
Radial feed distribution system
Dead-front cable connection
Customized MV and LV connection arrangements

Available protection and accessories include:

High voltage fuses
Current limiting fuses
Load break switches
Surge arresters
Pressure relief devices
Temperature monitoring systems

These protection solutions help ensure safe operation under different load and fault conditions.

Key Benefits:

Low no-load losses
High energy efficiency
Excellent thermal performance
Long operational lifetime

Manufacturing & Testing

Strict Quality Control and Transformer Testing

Every Pad Mounted Transformer undergoes comprehensive testing to ensure high reliability, safety and long service life according to international standards.

Routine Tests

Transformer Ratio Test

Ensures accurate voltage transformation performance.

Winding Resistance Test

Verifies winding quality and electrical performance.

No-Load Loss Test

Checks transformer core efficiency and energy performance.

No-Load Loss Test

Confirms transformer rated efficiency under operating conditions.

Impedance Test

Ensures correct electrical characteristics and system compatibility.

Dielectric Test

Verifies insulation strength and operational safety.

Special Tests

Temperature Rise Test

Validates thermal performance and cooling capability.

Lightning Impulse Test

Tests insulation capability against surge conditions.

Partial Discharge Test

Ensures insulation quality and long-term reliability.

Everything We Do Is At A High Standard

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WHAT WE DO

CTSS Transformer Applications and Solutions

We design and manufacture liquid-filled power transformers and distribution transformers for a wide range of applications, including solar power, data centers, industrial facilities, and utility systems. With experienced engineers and advanced manufacturing capabilities, we provide customized transformer solutions and complex winding designs to meet the specific electrical and performance requirements of each project.