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Transformers
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.
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.
EMG® 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.
- Voltage ratio
- Off-load absorption current
- Dielectric strenght
- Insulation resistance
- Induced test
- Vector group
- Winding resistance
- Dimensions
- temperature rise with the resistance variation method as envisaged by CEI EN 61558-1 legislation;
- off-load leaks;
- leaks in short-circuit;
- efficiency control.
- 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.
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 1000m
EN 60989 - EN 60076 - EN 61558
on request or technical specifications
The EMG® transformers and autotransformers are tailored-made solutions, depending on technical requirements, uses, applicable rules and standards, as well as technical feasibility
Static converters
UPS
Inverter
Railway system
Automatic system
Emergency unit
Switchboard
Renewable energy
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
none / type PTC / NC thermal contact
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 (e.g. box)
Ta=40°C, or on request
natural air / forced air
on request or technical specification
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.
The use of resin impregnated transformersallows 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
Other products
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
©Copyright 2020 Elettromeccanica Galliera srl - tutti i diritti sono riservati - all rights reserved
Informativa legale e privacy