Ground Mounted Transformer

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Product Overview

Ground Mounted Transformer

High-voltage rated voltage	6kV / 10kV / 20kV / 35kV
Low-voltage rated voltage	0.4kV / 0.48kV / 0.69kV
Rated capacity	10kVA - 5000kVA
Power Supply Mode	Not specified
Frequency	50Hz / 60Hz, 60Hz standard for South America
Cooling Type	Oil-immersed: ONAN/ONAF; Dry-type: AN/AF

Technical Specifications

High-voltage rated voltage	6kV / 10kV / 20kV / 35kV	Low-voltage rated voltage	0.4kV / 0.48kV / 0.69kV
Rated capacity	10kVA – 5000kVA	Power Supply Mode	Not specified
Frequency	50Hz / 60Hz, 60Hz standard for South America	Cooling Type	Oil-immersed: ONAN/ONAF; Dry-type: AN/AF
Vector Group	Dyn11 / Yyn0, Dyn11 preferred for export	Short-circuit Impedance	4% / 4.5% / 6% / 7.5%, customized per grid coordination
Anti-corrosion Grade	C3, C4, C5, CX-H	Ambient Adaptation	-40°C to +55°C, high-temperature enhanced version, high altitude, salt spray and UV resistant customization
Transformer Type	Oil-immersed type / Dry-type	Voltage Range	10kV – 35kV series
Maximum Voltage Class	35kV	Maximum Capacity	5000kVA
Applicable Standards	IEC 60076 Series / GB 1094 Series / GB/T 6451 / GB/T 10228	North American Standards	ANSI C57.12.00 / ANSI C57.12.90
Seismic Standard	IEEE 693, optional for seismic zone projects	Environmental Compliance	RoHS / REACH / EPA 40 CFR Part 761
Insulation Design	High insulation margin, increased creepage distance, anti-condensation and moisture resistant design	UV Resistance	UV aging resistant design for strong UV environments
Salt Spray Resistance	Salt spray resistant design, suitable for coastal environments	Temperature Adaptation	-40°C to +55°C high-temperature enhanced version available
Altitude Adaptation	High altitude customization available	Corrosion Protection	C3, C4, C5, CX-H
Core Material	High-permeability low-loss grain-oriented silicon steel	Core Joint Technology	5-step step-lap mitered joint technology
Core Clamping	Integral core clamping structure	Conductor Material	High-purity copper or aluminum
Winding Structure	Multi-strand transposition structure	Insulation Material	High-temperature resistant insulation materials
Drying Process	Multi-stage vacuum drying	Impregnation Process	Vacuum oil impregnation or vacuum varnish impregnation
Partial Discharge Control	Strict partial discharge control	Tank Construction	Integral welded tank for oil-immersed type
Tank Testing	Non-destructive testing and positive/negative pressure tightness testing	Enclosure Options	Stainless steel enclosure and heavy anti-corrosion structure optional
Weather Protection	Weather-resistant coating for strong UV, high temperature and rain exposure	Protection Structure	Rainproof and dustproof structure available
Design Simulation	3D multi-physics coupling simulation	Electromagnetic Optimization	Magnetic circuit optimization and additional loss reduction
Thermal Design	Enhanced heat dissipation margin for tropical high-temperature environments	Structural Design	Reinforced core clamping structure for transportation vibration and seismic loads
Typical Applications	Power grid distribution, industrial parks, commercial complexes, PV and wind power stations	Industrial Applications	Mines, oilfields, ports and industrial power distribution systems
Residential Applications	Residential areas, schools, hospitals and civil power supply projects	Export Applications	South America EPC power engineering projects
FAT Testing	Routine and type tests including insulation, ratio, vector group, DC resistance, no-load loss, load loss and temperature rise	Withstand Testing	Power frequency withstand voltage and induced withstand voltage testing
Partial Discharge Test	Included in factory acceptance testing	Short-circuit Test	Excluded from factory FAT, destructive special type test by authorized third-party institutions
Test Documentation	English test reports, material certificates and traceability documents available	Environmental Documentation	LCA and ESG lifecycle reports available
Installation Support	Overseas installation guidance	Commissioning Support	Remote commissioning training
Warranty	Long-term warranty available	Spare Parts Supply	25-year key spare parts supply guarantee

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.