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Zucchini MV Transformers

Verified by manufacturer 5 days ago

SR 100 kVA: Po 252 W, Pk 1800 W, Io 1%

Legrand Electric Ltd Variant:

High efficiency transformers.

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0345 605 4333 Website

Application

Suitable for high-voltage dry-type transformer applications.

Description

A range of high efficiency transformers.

The Legrand Green T.HE transformers fully comply with the new eco-compatible design rules and guarantee a significant reduction in energy consumption, thus promoting significant economic savings and the reduction of CO2 emissions into the atmosphere.

Partial discharges are microscopic phenomena occurring inside insulating resin cavities and are a factor in the speeding up of the ageing process of a transformer. Therefore, it is important that the values of such currents are limited. According to the product standard regarding the design of resin transformers (IEC 60076-11), all windings with a voltage of ≥ 3.6 kV are subject to the measure of partial discharges and the value measured should not exceed 10 pC (picocoulomb). When the Green T.HE transformers were subjected to the measurement of partial discharges, the values detected were always below 5 pC, significantly better than required by the standard.

A low value of partial discharges represents the index of some positive factors, such as:

  • proper and solid design criteria.
  • quality raw materials.
  • precision during conductor foil winding phases.
  • competence during the epoxy resin pouring around the high-voltage winding.
  • accuracy in final assembling of the complete assembly.

It is clearly evident that a lower level of partial discharge leads to a higher resistance to work stresses and consequently to a higher life expectancy of the transformer under examination.

Features and benefits:

  • Confirming to IEC 60076-11 and EU regulation 548/2014.
  • HV (high voltage) and LV (low voltage) terminals have been modified and built to facilitate the connection of the product on both windings.
  • The HV windings are all made in BIL LIST 2, thanks to the reinforced insulation in the critical points of the unit.
  • They guarantee very high performance and reduced losses compared to previous models, while maintaining equivalent weights and dimensions. All this is possible thanks to the completely new magnetic core with newly developed and high-performance material.
  • New magnetic core.
  • Reinforced insulation.
  • Higher performance with low weights and dimensions.

General information

Color

Green

Material

Epoxy resin

Shape

Circle

Length

1150 mm

1200 mm

1300 mm

1350 mm

1450 mm

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Width

750 mm

780 mm

850 mm

1000 mm

1500 mm

Height

1290 mm

1310 mm

1370 mm

1430 mm

1490 mm

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Warranty description

Two year

Uniclass

Pr_60_70_36_24 High-voltage dry-type transformersPrimary

SKU Code

z

Specification data - High-voltage dry-type transformers

Classification data

Standard

To BS EN 50708-2-1, IEC 60076-11.

Rated apparent power

100 kVA.

Core material

Vacuum-cast resin.

Cooling medium

Air (A).

Temperature class

High-voltage (HV) and low-voltage (LV) windings, to Class F.

Climatic class

Class C2.

Environmental classification

Class E3.

Guidance for specification option:

E4 is available on request, consult the manufacturer for details.

Fire behaviour class

To BS EN IEC 60076-11, Class F1.

Highest voltage for equipment windings (Um)

24 kV.

Rated frequency

50 Hz.

Number of phases

Three.

Rated primary voltage (Uprim)

11000 V.

Rated secondary voltage (Usec)

417 V at no-load.

Guidance for specification option:

Also available in 400, 415, 420 and 433 V, consult manufacturer for details.

Vector group

To BS EN 60076-1, Dyn11.

Sound pressure level (maximum)

51 dB (A).

Indicators and alarms

-

Thermal protection

Low-voltage (LV) winding temperature sensors (one per each winding).

Enclosure

-

Ingress protection (minimum)

IP23.
IP31.

Manufacturer guidance

Achieved with the use of an appropriate enclosure (specified separately).

Colour

Green.

High-voltage connection arrangement

Top cable entry.

Low-voltage connection arrangement

Top cable entry.

Guidance for specification option:

The LV connection terminals are made of aluminium. Appropriate CUPAL bimetal plates are also available for copper connections, consult manufacturer for details.

Accessories

Cupal plates.

Guidance for specification option:

Cupal is a bimetal sheet made up of one copper sheet and one aluminium sheet welded together through a special mechanical procedure Cat. Nos. refer to a single CUPAL sheet

Example : for a transformer with a power of 1250 kVA, the correct CUPAL plate is Cat. No. 030012 1 CUPAL has 2 plates (1 aluminimium and 1 copper) therefore for quantity calculation - 2 plates x 4 LV terminals = 8 CUPAL plates.

Enclosure.

Guidance for specification option:

  • Insulation Class 12 / 17·5 / 24 kV.
  • Degree of protection : IP 23 / IP 31.
  • Colour RAL 7035.
  • Boxes can be supplied or assembled on the transformer.

Rubber supports (anti-vibration).

Guidance for specification option:

Four anti-vibration pads for mounting under transformer casters.

Surge arrester kit

Guidance for specification option:

Supplied mounted on the transformer.

Temperature control device.

Guidance for specification option:

Control units are supplied unassembled.

Temperature measurement sensor.

Guidance for specification option:

Temperature measurement sensors are supplied mounted on to the transformer and wired to aluminium IP 65 junction box.

Ventilation fan.

Guidance for specification option:

According to IEC 60076-1, a transformer is called AN even if it is equipped with discontinuous ventilation If a transformer with AF continuous duty power is required, please consult the manufacturer. Ventilation fans allow a temporary increase of the rated power (under normal service conditions).

Manufacturer guidance

An extensive range of accessories are available, consult technical literature for details and insert requirements.

Series

Ao--10%Ak.

Sustainability data

Material

Epoxy resin

Literature

\Zucchini MV Transformers

\Zucchini MV Transformers