CAST RESIN TRANSFORMER

Our Cast Resin transformers products are designed to withstand the toughest environmental conditions and offer an extremely high level of reliability even under the harshest conditions.

As electrical loads and the cost of energy increase, there is a greater need to place transformers close to the electrical centre of the distribution systems. This reduces long runs of expensive feeder conductor, minimises distribution losses, and allows better voltage regulation.

Cast Resin Dry-type transformers use air as their main cooling medium and have neither the liquid leakage hazard nor the associated maintenance and potential flammability problems inherent in liquid filled units. Medium Voltage, Low Voltage transformers & Reactor in dry-type technology both with standard and reduced losses to get high-efficient dry type transformers Up to 25MVA and 36kV in Class F or Class H (180) system

Enclosure from IP00 to IP68
Liquid cooling tailor-made solutions, direct, indirect, AFWF Air water cooling

STANDARD COMPONENTS OF CAST RESIN TRANSFORMERS

Lifting Lugs

Four lifting lugs are provided on the top core clamps.

Three-limb Core

The core is manufactured from prime quality, low loss, grain oriented ferro-silicon steel laminations, individually coated with high temperature, inorganic insulation. The completed core is treated with a high temperature, electrically stable coating, to prevent corrosion in service.

High Voltage (HV) Windings

HV windings consist of vacuum cast, fibreglass reinforced aluminium or copper foil. The foil is edge conditioned and wound in continuous discs onto a precision former. This system of winding guarantees the accuracy required for close tolerance casting in precision moulds.

Epoxy Resin Insulation

The windings are reinforced with fibreglass mesh and vacuum cast in high temperature epoxy resin. The resin ensures the transformer is maintenance-free, moisture-free, tropicalised, flame-resistant and self-extinguishing.

High Voltage Terminals

HV terminals are available with variable arrangements to permit optimum installation.

High Voltage Tappings

For off-circuit adaptation to the supply network.

Dry Type Cast Resin Transformers | Vertica Solutions Pte Ltd

Standard Components of Cast Resin Transformers

Low Voltage (LV) Windings

LV windings are produced with aluminium or copper foil covering the full winding length. The foil conductor edges are conditioned prior to winding and each LV turn is insulated with three-ply, resin impregnated high temperature film laminate.

After winding, vacuum pressure impregnation and final oven hardening fully protect the coil from infiltration of moisture.

Low Voltage Terminals

Tinned aluminium or copper

Low Voltage Terminal Insulator

Strengthens LV terminal palms against mechanical forces.

Resilient Supports

Provide insulation for core and windings against mechanical vibrations.

Temperature Monitoring

Detectors in the LV winding.

Bi-directional Metallic Wheels

Hot Dipped Galvanised Steel Core Feet

Standard Components of Cast Resin Transformers

TMC CAST RESIN TRANSFORMERS

Negligible Partial Discharge

Internal partial discharge, which is a major cause of erosion and failure in insulation systems at voltages greater than 12kV, are effectively eliminated in our

cast resin transformers, significantly extending the

service life.

Environmentally Safe

Negligible Partial Discharge

TMC cast resin transformers contain no liquid to pollute the ground or water supplies, and special measures are required to guard against spillage.

Fire and Flame Resistant

Negligible Partial Discharge

Lightning Impulse Withstand Voltage (BIL)

The resin formulations used in our cast resin transformers are self-extinguishing thus increasing safety and reducing the risk to life and property in the event of a fire.

Lightning Impulse Withstand Voltage (BIL)

TMC cast resin transformers are designed to withstand lightning impulse voltages even in the absence of surge protection devices.

High Thermal Conductivity

Lightning Impulse Withstand Voltage (BIL)

Inherent Superior Dynamic Strength

Our cast resin transformers are mechanically resistant and thermally tolerant to short term overloads.

Inherent Superior Dynamic Strength

Lightning Impulse Withstand Voltage (BIL)

Inherent Superior Dynamic Strength

Increased ability to withstand short circuit is inherent in a foil wound cast resin transformer.

Superior Plant and Manufacturing Practices

State-of-the-art foil winding machines enable insulation and conductor materials to be wound simultaneously, resulting in a very compact winding, capable of resisting radial and short circuit forces.

A further major electrical advantage over conventional wire or strip windings is that the interlayer voltage never exceeds the individual voltage of each turn. This results in lower internal electrical stress and a more reliable product than that of competitors using less sophisticated wire winding technologies.

International Standards

Superior Plant and Manufacturing Practices

Our transformers are manufactured in Spain and Australia in accordance with strict international standards.

Several climatic classes are defined in IEC 60076-11

Class C1

The transformer is suitable for operation at ambient temperatures above -5 °C but may be exposed during transport and storage to ambient temperatures down to -25 °C .

Class C2

Class C1

The transformer is suitable for operation, transport and storage at ambient temperatures down to -25 °C.

Class C3

Class C1

Class C3

The transformer is suitable for transport and storage down to 40 °C and operation down to 25 °C.

Class C4

Class C3

The transformer is suitable for transport and storage down to 50 °C and operation down to 40 °C.

Class C5

Class C4

Class C5

The transformer is suitable for transport and storage down to 60 °C and operation down to 50 °C.

Environmental classes

Class E0

No condensation occurs on the transformers and pollution is negligible. This is commonly achieved in a clean, dry indoor installation.

Class E1

Class E0

Occasional condensation can occur on the transformer (for example, when the transformer is de-energized). Limited pollution is possible.

CAST RESIN TRANSFORMER

STANDARD COMPONENTS OF CAST RESIN TRANSFORMERS

TMC CAST RESIN TRANSFORMERS

Negligible Partial Discharge

Negligible Partial Discharge

Negligible Partial Discharge

Environmentally Safe

Negligible Partial Discharge

Negligible Partial Discharge

Fire and Flame Resistant

Negligible Partial Discharge

Lightning Impulse Withstand Voltage (BIL)

Lightning Impulse Withstand Voltage (BIL)

Lightning Impulse Withstand Voltage (BIL)

Lightning Impulse Withstand Voltage (BIL)

High Thermal Conductivity

Lightning Impulse Withstand Voltage (BIL)

Inherent Superior Dynamic Strength

Inherent Superior Dynamic Strength

Lightning Impulse Withstand Voltage (BIL)

Inherent Superior Dynamic Strength

Superior Plant and Manufacturing Practices

Superior Plant and Manufacturing Practices

Superior Plant and Manufacturing Practices

International Standards

Superior Plant and Manufacturing Practices

Superior Plant and Manufacturing Practices

Several climatic classes are defined in IEC 60076-11

Class C1

Class C1

Class C1

Class C2

Class C1

Class C1

Class C3

Class C1

Class C3

Class C4

Class C4

Class C3

Class C5

Class C4

Class C5

Environmental classes

Class E0

Class E0

Class E0

Class E1

Class E0

Class E0

Class E2

Class E0

Class E2

Class E3

Class E3

Class E2

Class E4

Class E3

Class E4

Fire behaviour classes

Class F0

Class F0

Class F0

Class F1

Class F0

Class F0

Cooling code and classes of insulation

For dry type transformers there are two types of cooling methods:

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