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Transformer


EMG® low voltage three-phase transformers are highly customisable which is why they can satisfy all customer needs. The three-phase transformers are fundamental components for example in UPS units, renewable energy production systems such as photovoltaic systems, and in the railway industry

 

 

 

Transformers > Test

Test

Test


Quality and safety at the forefront

We check that all our transformers are compliant with the applicable regulation in the electrical field. Only the equipment which passes all tests obtains the check stamp. Our transformers are compliant with the EN 60076, EN 60989 and EN 61558 European standards for insulation transformers.

 

 

Prototype final testing

We check that the prototype perfectly meets the customer requirements. As well as the routine tests, prototype final testing involves additional tests thanks to which we can assess the transformer operation in the context of its actual use, measuring the noise, temperature and efficiency.

 

Prototype tests (type specific tests):

-temperature rise with the resistance variation method as envisaged by CEI EN 61558-1 legislation;

-off-load leaks;

-leaks in short-circuit;

-efficiency control.

 

Tests upon request:

-measurement of sound pressure (in dB) under nominal and strain conditions (in other words with voltage values increased by 10-15% with respect to the nominal voltage);
-calculation of sound power (in dB), as required by applicable legislation;
-power supply through a converter with switching frequencies ranging from 1 to 10 kHz and with carrier frequencies ranging from 30 to 1,900 Hz variable in order to check temperature and noise;

-on-load non-linear final test up to 100 kVA.

 

 

Custom

Designing and building customised products means offering the most appropriate solution for the customer needs, while respecting the regulations and laws in force. The parameters indicated on the products can be modified according to customer specific requirements.

 

What do the routine tests check?

The voltage ratio

Off-load absorption current

Dielectric strength

Insulation resistance

Induced test

Vector group

Winding resistance

Dimensions

Transformers > Data sheet

Data sheet

Data sheet

The EMG®  transformers and  autotransformers are tailored-made solutions, depending on technical requirements, uses, applicable rules and standards, as well as technical feasibility.

 

Power


Number of phases


Maximum nominal voltage


Frequency


Insulation class


Electrostatic screen


Connections


Protection level


Maximum room temperature


Altitude


Compliant to regulations


Efficiency



from 100 VA to 1 MVA


1 (singlephase) / 3 (three-phase)


999V


50 / 60 Hz, on request other frequency


F / H


on request or technical specifications


cable terminals / bars, on request other connections


IP00, on request other temperatures


Ta = 40°C, on request other temperatures


up to 1000 m


EN 60989 - EN 60076 - EN 61558


on request or technical specifications

Transformers > Applications

Applications

Static converter   

UPS

Inverter

Railway system

Automatic system

Emergency unit

Switchboard

Renewable energy

Transformers > Custom

Custom

Custom

Not only EMG® products are highly customisable depending on application field in which they are used (railway industry, renewable energy production system, etc.), depending on the most various needings, thank to countless options for customization.


Dimensions


Executions


Insulation Voltage


Number of secundaries or primary


Vcc %


Vector group


Thermal sensor


Electrostatic screen


Connections

standard



on request




Insulation class


Resin impregnated


Protection level


Maximum room temperature


Air cooling


Simulation test

on request or technical specification


horizontal / vertical


on request or technical specification


on request or technical specification


on request or technical specification


on request or technical specification


on request or technical specification


none / yes


cable terminals

Copper / Aluminium bars

Termoplastic terminals


Customised screw terminal board

Weidmueller, Synflex, Phoenix clamps

Pre-wiring ending wires


F / H


no / yes


IP00, on request other IP


Ta = 40°C, or on request


natural air / forced air


on request or technical specification

The use of resin impregnated transformers allows to have high insulation levels of 30 kV, hence passing the water immersion test. 


This type of transformer is used in environments with a high level of humidity, condensation or dust, which is typical of railway applications

It is possible to put the transformer inside a box, with protection level on request

Transformer > Other products

Other products

Other products



Autotransformer



Three-Single Transformer



Three-phase input and single-phase output, open delta connection. The open delta design means an imbalance between the three phases, equal to (IR+IT=IS). In order to reduce the imbalance of the input currents they can be built using three wound coils and an accessible primary neutral.

 

Technical specifications and personalisations as three-phase transformer

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