Isolation and Power Transformer - ETR 3P250KVA

ETR Galvanic Isolation Transformers provide isolation between network installations and sensitive electronic loads. Insulated aluminum or copper windings are wound on a high efficiency sheet core. ETR transformers are vacuum-impregnated varnished and high-temperature dried to ensure quiet and moisture-proof operation. It is safe and long lasting. 

Copper and Aluminum Winding
High Efficiency Sheet Core
Varnishing under vacuum
Oven drying at high temperature
Strengthened isolation up to 2500V
1KVA-600KVA power range
3 Phases, 2 Phases and 1 Phase input
Galvanic Isolation Transformer
Supply transformers
Voltage changing transformers
ETR Transformers Technical Features
Power (kVA)250 KVA
DesignOpen type
Vector GroupSpecial design for all vector groups of standard type
CoreHigh efficiency sheet core
Windings Insulation ClassCopper or Aluminum wire with fiberglass or enamel insulation F (H class is optional )
Input
Rated Input Voltage400VAC 3Phases+Neutral+Ground (Different Voltages are optional)
Voltage Tolerance-%15 , +%15
Frequency50 Hz. +/-%5 (60 Hz. Optional)
Output
Rated Output Voltage400VAC 3Phases+Neutral+Ground(Different voltages are optional)
Short Circuit Voltage5% (Average)
Efficiency>90% - 98%
Optional Features
CabinetCustom-designed monoblock welded cabinet between IP21 and IP54
Over-current ProtectionProtection with Circuit Breaker at Input and Output (can be selected with Cabinet Option)
Over-Temperature ProtectionWarning and protection with over-temperature thermostat
Display and SignalsMeasurement and signaling options for voltage, current, temperature parameters (It can be selected with Cabinet Option)
Environmental Conditions
Operating Temperature-10 °C ~ +40 °C
Altitude Operating Height1.500m
Humidity90% none condensed
Protection ClassIP00
OPTIONCODEDESCRIPTION
Non-standard input voltage valuexxxVETR Transformators can be produced at any required input voltage value that must be stated clearly by the order confirmation.
Non-standard output voltage valuexxxVETR Transformators can be produced at any required output voltage value that must be stated clearly by the order confirmation.
Soft-Start Feature SSA Soft-Start unit can be added to limit the high currents generated during initial energizing.
Non-standard frequencyFRQETR Transformatörler can be produced to function with 60 Hz network frequency. 
CB Protection At Input and OutputOCBOptional MCCB may be added to the ETR Transformator input and output to provide additonal protection.
Special EnclosureKETR Transformators can be produced both INDOOR and OUTDOOR in special cabinets having different IPXX protection classes.
Thermostat Controlled Fan CoolingTFSThermostat-controlled fan cooling can be optionally added to ETR Transformers at the order confirmation.
Display and Signals GSMeasurement and signaling options for voltage, current, temperature parameters (It can be selected with Cabinet Option)
ETR Isolation Transformers

Provide isolation between network installations and sensitive electronic loads.
Insulated aluminum or copper windings are wound on a high efficiency sheet core. ETR transformers are vacuum-impregnated varnished and high-temperature dried to ensure quiet and moisture-proof operation. It is safe and long lasting. It is designed and produced in different power, different voltage and different vector features according to customer demands.
It is produced in the power range of 1kva-600kva as single phase and three phases for industrial applications.





Voltage Changing and Supply Transformers

It is used for safe operation and voltage changing in machines or electronic devices. They are designed as double winding isolated type or single winding auto type.
Specially designed cabinet for indoor and outdoor applications. Outdoor cabinet with high protection class up to IP65 according to customer needs. Project-specific protection and display options.

Soft-Start Feature (optional)

A Soft-Start unit can be added to limit the high currents generated during initial energizing. Soft-Start circuit reduces the inrush current of the transformer by 1/3. It provides a solution for ship and yacht applications where instant high currents adversely affect electronic devices. Soft Start feature is available for cabinet option.

Outdoor Type Cabinet and Protection Options

Special cabinet option with high protection class up to IP54 for special applications. Voltmeter, Ammeter and signal lamp options are offered together with the special cabinet designed according to the project needs. Fuse and over temperature protection can be added for Input and Output side.

Applications
  • Medical devices
  • Uninterruptible power supplies
  • Ships and shipyards
  • Machine production
  • Iron and steel
  • Lighting
Solutions and Applications
  • Galvanic Isolation
  • Voltage changing
  • Phase number and Vector switching
Document Name
Download
ETR ETR English Catalog
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