Containerized Substation

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Product Overview

Containerized Substation

High-voltage rated voltage	6 kV - 35 kV (typical); custom higher voltage available
Low-voltage rated voltage	0.4 kV, 6.6 kV, 10.5 kV, etc., customizable
Rated capacity	500 kVA - 30 MVA; multi-module parallel for larger capacity
Power Supply Mode	Container Power Transformer System; Grid Connection And Renewable Energy Applications
Frequency	50 Hz / 60 Hz, dual-frequency custom for overseas projects
Cooling Type	Transformer: ONAN / ONAF / OFAF; Container enclosure: air-conditioning + forced ventilation
Fluid Type	Mineral Oil; Ester Fluid Optional

Basic Electrical Parameters
Container dimension	20ft / 40ft HC ISO standard; multi-module combined custom size available	High-voltage rated voltage	6 kV – 35 kV (typical); custom higher voltage available
Low-voltage rated voltage	0.4 kV, 6.6 kV, 10.5 kV, etc., customizable	Rated capacity	500 kVA – 30 MVA; multi-module parallel for larger capacity
Power Supply Mode	Container Power Transformer System; Grid Connection And Renewable Energy Applications	Frequency	50 Hz / 60 Hz, dual-frequency custom for overseas projects
Cooling Type	Transformer: ONAN / ONAF / OFAF; Container enclosure: air-conditioning + forced ventilation	Fluid Type	Mineral Oil; Ester Fluid Optional
Transformer Type	Oil-immersed Or Dry-type Transformer Optional	Typical Model	40ft-HC Container-mounted Boost Power Station; 10 MVA, 35 kV / 0.69 kV
Primary voltage	35 kV	Secondary voltage	0.69 kV
Rated voltage class	According To Project Voltage Requirement	Application Type	Utility Grid Connection; Renewable Energy Power Conversion System

Protection And Control System
MV switchgear	SF6-insulated or air-insulated; IEC 62271 compliant; Remote control and SCADA communication supported	LV distribution	IEC 61439 compliant; ACB / MCCB, protection relays and metering devices
Control and protection	Integrated protection relay, data-acquisition unit and edge gateway	Remote monitoring	Remote monitoring, fault alarm and remote upgrade supported
Communication protocol	IEC 61850; Modbus-TCP/RTU; IEC 60870-5-104	Special function	Remote monitoring; fault alarm; grid-code compliant voltage-reactive-power control
Fire-safety system	Multi-zone smoke-temperature composite detection; gas fire suppression; pressure-relief vents; emergency stop	Auxiliary power	UPS; ATS automatic transfer switch; auxiliary transformer; internal lighting and emergency stop device
Protection relay	Integrated digital protection system; Overcurrent, overload and fault protection functions	Metering system	Energy metering; Voltage, current and power monitoring
SCADA integration	SCADA communication interface available; Remote operation supported	Fault alarm	Local And Remote Fault Alarm Function

Container Structure And Environmental Conditions
Enclosure protection	IP54 standard; IP55 optional	Container protection	IP54; C5-M anti-corrosion coating
Operating ambient temperature	-25 °C ~ +55 °C High-low-temperature adaptation customized	Seismic requirement	Comply with IEEE 693 upon project request
Anti-corrosion coating	C3, C4, C5, CX-H	Mechanical impact resistance	IK10 for external surfaces
HVAC system	Air-conditioning + forced ventilation; Dehumidification and temperature/humidity monitoring available	Cooling arrangement	Transformer ONAF; Container air-conditioning + forced ventilation
Earthing system	Equipotential earthing grid inside container; Full-range lightning and surge protection	Noise emission	Typical ≤70 dB(A) at 1 m under full-load; Low-noise version available upon request
Service life	≥25 years design service life under normal operating conditions	Environmental adaptability	Suitable for outdoor installation and harsh environmental conditions
Container material	High-strength steel structure; Outdoor weather-resistant design	Installation environment	Outdoor power generation and distribution applications

Transformer Technical Design
Transformer type	Oil-immersed transformer or dry-type transformer optional	Cooling arrangement	Transformer ONAF; Container air-conditioning + forced ventilation
Insulation system	Oil insulation system or dry-type insulation system according to transformer type	Transformer efficiency	High efficiency transformer design; Low-loss operation available
Transformer connection	According to grid connection requirements and project specifications	Voltage regulation	Designed according to system voltage regulation requirements
Short circuit withstand	Designed to withstand electrical and mechanical stress during short circuit conditions	Protection level	Integrated electrical and mechanical protection system
Installation And Standards
Deployment	20ft / 40ft single-module or multi-module combined solution; Parallel expansion supported	Installation type	Factory assembled containerized installation; Outdoor installation available
Applicable standards	IEC 60076; IEC 62271-202; IEC 62271-1; IEC 61439; IEC 60529; IEC 62262	Export compliance	RoHS and REACH; EPA 40 CFR Part 761 PCB-free dielectric-fluid requirement
Custom options	Custom voltage level; Capacity expansion; Protection configuration; Communication system customization	Project customization	Customized according to utility requirements, renewable energy projects and industrial applications

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.