Iron-core Reactor

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Product Overview

Iron-core Reactor

High-voltage rated voltage	6kV / 10kV / 35kV; customizable
Low-voltage rated voltage	Not applicable for this reactor configuration
Rated capacity	50kvar - 60Mvar
Power Supply Mode	Series current limiting / filter / neutral earthing / motor starting / shunt compensation
Frequency	50Hz; 60Hz customizable for overseas projects
Cooling Type	AN air natural cooling, dry type

Technical Specifications

Parameter	Value	Parameter	Value
High-voltage rated voltage	6kV / 10kV / 35kV; customizable	Low-voltage rated voltage	Not applicable for this reactor configuration
Rated capacity	50kvar – 60Mvar	Power Supply Mode	Series current limiting / filter / neutral earthing / motor starting / shunt compensation
Frequency	50Hz; 60Hz customizable for overseas projects	Cooling Type	AN air natural cooling, dry type
Reactor Type	Dry-type iron-core reactor	Product Portfolio	Series current limiting reactor / filter reactor / neutral earthing reactor / motor starting reactor / shunt compensation reactor
Reactance Rate	0.1% – 14% for series reactors; filter and neutral reactors customized	Insulation Level	Designed according to IEC 60076-6, GB/T 1094.6 and GB/T 25075
Installation	Indoor / outdoor vertical mounting	Ambient Temperature	-40°C to +40°C
Environmental Adaptability	High-altitude, coastal salt-spray and extreme-cold versions available	Typical Model	10kV, 2000kvar, 4.5% dry-type iron-core series reactor
Typical Rated Voltage	10kV	Typical Rated Capacity	2000kvar
Typical Reactance Rate	4.5%	Typical Cooling Arrangement	AN air natural cooling
Anti-corrosion Grade	C3 standard; C5-M heavy anti-corrosion coating optional	Installation Environment	Indoor switchgear room or outdoor substation installation
Inductance Characteristic	Stable inductance within the rated operating range with segmented air-gap design	Saturation Control	Segmented air gaps suppress core saturation and reduce inductance degradation under harmonic loads
Partial Discharge Level	<=10pC at 1.1 x rated voltage	Noise Level	Typical 62dB(A) at 1m; low-noise version available
Short-circuit Withstand	Designed and validated according to IEC 60076-5	Dynamic-force Safety Margin	>1.3 x calculated value
Thermal Performance	Temperature rise compliant with IEC / GB requirements	Harmonic Thermal Margin	Thermal margin reserved for harmonic-load operating conditions
Design Life	>=30 years under normal indoor / outdoor service conditions	Insulation Medium	Epoxy fiberglass dry encapsulation or varnish impregnation
Oil-free Design	Dry type, oil-free construction with no fire hazard from insulating oil	Carbon Footprint	LCA life-cycle assessment documentation available for ESG reporting
Core Material	High-permeability low-loss grain-oriented silicon steel	Core Air-gap Design	Segmented air-gap structure with high-temperature non-magnetic spacing blocks
Core Clamping	Robust clamping structure designed for mechanical stability	Core Coating	Insulating anti-corrosion paint
Conductor Material	Multi-strand parallel oxygen-free aluminum; copper optional	Conductor Insulation	Single-strand film insulation
Conductor Transposition	Transposition design to reduce harmonic eddy-current losses	Conductor Quality Control	Conductor material screened for resistivity consistency
Coil Encapsulation	Epoxy fiberglass or varnish impregnated construction	Coil Insulation	Sufficient turn and layer insulation redundancy with strict partial-discharge control
Support Insulators	High-strength epoxy insulators	Pollution Resistance	Hydrophobic and anti-pollution support structure
Metal Structure	Anti-corrosion coating with C3 standard protection	Coastal Protection	C5-M heavy anti-corrosion protection optional for coastal salt-spray environments
Auxiliary Accessories	Support insulators / earth terminals / corona shields / rain hoods	Temperature Monitoring	Optional fiber-optic temperature online monitoring system
Electromagnetic Design	3D FEM electromagnetic analysis with air-gap and fringing-flux evaluation	Magnetic Field Analysis	Rated-load and harmonic-load loss calculation with inductance-current curve verification
Core Saturation Analysis	Local saturation control and inductance stability verification	Eddy-current Loss Analysis	Evaluation of core and winding eddy-current losses under rated and harmonic loads
Mechanical / Seismic Design	ANSYS structural analysis for short-circuit force, core clamping and support structures	Seismic Qualification	IEEE 693 seismic qualification available as an option
Short-circuit Simulation	Transient electromagnetic-field simulation for coil forces and structural stress	Mechanical Validation	Core clamp, support insulator and coil encapsulation strength verification
Insulation Coordination	Turn, layer and main insulation electric-field analysis	Impulse Withstand	Lightning impulse and switching impulse withstand verification
Thermal-flow Simulation	CFD analysis for steady-state and harmonic-load temperature rise	Hot-spot Control	Coil and core hot-spot temperature control under harmonic operation
Noise Optimization	Air-gap optimization and structural design to reduce vibration and noise	Stray-loss Optimization	Optimized magnetic-field distribution to reduce stray losses
Applicable Standards	IEC 60076-6 / GB/T 1094.6 / GB/T 25075	North America Standard	IEEE C57.16 optional for export projects
Seismic Standard	IEEE 693 optional for high-seismic substations	Environmental Compliance	RoHS and REACH hazardous-substance control
Material Compliance	Key materials comply with IEC / GB requirements	Material Traceability	Full material traceability available
Factory Acceptance Test	Routine and type tests including inductance, DC resistance, loss, partial discharge and dielectric withstand	Witness Testing	Client or third-party witnessed testing available
Short-circuit Test	Short-circuit testing performed only by specialized authorized third-party laboratories	Factory Test Capability	Factory does not perform the specialized short-circuit test
Installation Support	Installation guidance, lifting supervision and pre-commissioning inspection	Commissioning Support	Commissioning assistance and technical support available
Warranty	Comprehensive product warranty	Extended Service	Extended service agreement optional
Spare Parts Supply	Minimum 25-year supply support for key components	Training	On-site or remote operation and maintenance training
Training Scope	Saturation, vibration, heating, operation and maintenance	Quality Management	ISO 9001 / ISO 14001 / ISO 45001
Customization	Series / filter / motor-starting / neutral earthing / shunt compensation reactor configurations	Special Environment	High altitude, coastal salt spray, extreme cold and low-noise versions available
Typical Applications	PV / wind collection substations, power-grid substations and renewable-energy stations	Industrial Applications	Metallurgy, arc furnaces, VFD systems, cement and chemical plants
Power Grid Application	10kV / 35kV series current-limiting reactors	Harmonic Mitigation	Filter iron-core reactors for industrial harmonic control
Motor Application	Motor starting reactors for generator and high-voltage motor circuits	Neutral Earthing Application	Neutral earthing reactors for high-voltage electrical systems
Reactive Compensation	Reactive compensation and harmonic-control applications	New-energy Application	PV / wind collection substations and renewable-energy power stations
Export Frequency	60Hz versions customizable for overseas EPC projects	Design Workflow	Fully digital multi-physics simulation before manufacturing
Simulation Domains	Electromagnetic / thermal / fluid / structural / seismic	Performance Documentation	Traceable simulation and technical performance documentation available

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.