Visit us at PCIM Expo – Hall 4, Stand 333!

Our Sales Team is delighted to welcome you to visit and discover the high-quality Trafox solutions at our stand 4-333!

• Trafox Filters
• Trafox Reactors
• Trafox Transformers
• Trafox Power Transformers
• Trafox Superintend Monitoring Devices

Exhibition grounds are open  9-11 June 2026
Tuesday to Thursday
Daily, 9.00 a.m. to 5.00 p.m.

Looking forward to seeing you in Nuremberg!

Power Transformers for Energy, Marine and Industry applications

• This new series of transformers has been designed to be cost-effective -> 15-20% lower losses!
• The effective manufacturing methods cause less strain on the environment and all the raw materials can be recycled.
• This new series of transformers fulfills the most common standards and international norms.
• Transformers can be manufactured also according to norms such as DNV or LRS or customer’s specified specifications.

Important Notice: We have not changed our bank accounts!

Fraudulent emails have been sent in our company’s name, falsely claiming that our bank account details have changed.
This is not true — our bank details remain unchanged.

Some of these messages come from fake addresses such as @trafcx.fi instead of our official @trafox.fi.
Please ignore such messages and contact us directly if in doubt.

Thank you in advance for your cooperation.

NEW – Lloyd’s register type approved Insulation Monitoring System IM-04.INDM!

Trafox Superintend® IM-04.INDM and IM-04.INDM_24 Insulation Monitoring devices for Marine applications

• NEW! Now with Lloyd’s type approval certification
• Designed to be used in demanding Marine environments
• Functionality verification has included frequency converter applications
• Measures the insulation resistance and capacitance of AC/DC networks
• Detects also symmetrical insulation faults

	IM-04.INDM – Insulation Monitoring Device Download the brochure from here:  IM-04.INDM for Marine applications

NEW Remote alarm indicator panel RD-12.RCCB available now!

• With RD-12.RCCB, up to 12 RCCBs can be monitored remotely with one device
• Overall status indicated with LED lights
• Statuses of all RCCBs shown simultaneously on the LCD display
• Configurable identification texts for RCCBs
• Tripped RCCBs indicated also with alarm sound which can be muted
• Alarm memory possibility

RD-12.RCCB – Remote alarm indicator panel

Download the RD-12.RCCB product sheet from here (pdf)

NEW – UL certified Insulation Monitoring devices available now!

IM-04DCCT.UL and IM-04DCCT_24.UL – Insulation Monitoring device UL certified Designed to be used in demanding environments Measures the insulation resistance and capacitance of AC/DC networks Detects also symmetrical insulation faults Suitable for different application fields, for example      Electric vehicle DC charging stations      DC networks Nominal system voltage 0…1000 VDC N/C and N/O selectable Modbus RTU Automatic adaptation to the system leakage capacitance up to 5 uF Selectable start-up delay According to the standard IEC 61851-23 Download the IM-04DCCT product sheet from here, ENG (pdf)

IM-05DCCT.UL – Insulation Monitoring device UL certified For voltages up to 1000 VDC / 690 VAC Monitoring of system voltage Short circuit proof and galvanically isolated outputs for system status system OK or alarm indication of insulation resistance with PWM signal CAN bus interface Download the IM-05DCCT product sheet from here (pdf)

Our invoicing address will change on 1.12.2024

Dear partner,

For our part, we are trying to help forward the e-invoicing process and we hope to receive your invoices as e-invoices whenever possible. Please, note the new invoicing address starting from 1.12.2024.

Muuntosähkö Oy

Paper invoices should be sent to this address:

Muuntosähkö Oy
PL 2561
02066 DOCUSCAN

Kind Regards,
Muuntosähkö Oy

23.10.2024: Invoicing information ( PDF)

Offline Insulation Monitoring device for industrial use

IM-04.INDD up to 3 x 173/300 VAC	IM-01.INDD up to 3 x 400/690 VAC
IM-04.INDD.10 + HVC-10 up to 3 x 400/690 VAC

Principle of operation

The system is equipped with a disconnection contactor which is controlled by the IMD. When the system is started, the disconnection contactor is open, disconnecting the load network from the supply network. At the same time, the NC auxiliary contacts of the disconnection contactor connects the supply network to the measurement input connectors of the IMD. When the load network is supposed to be connected to the supply network, a command is sent to the IMD through the Modbus RTU interface. After receiving the connection command, the IMD disables insulation monitoring and powers the disconnection contactor, which connects the load network to the supply network and disconnects the measurement inputs from the load network. Disconnecting the load network from the supply network works the same way in the opposite manner.

The disconnection contactor must have 4 NO contacts and 2 NC auxiliary contacts. A suitable type is, for example, ABB AF116B-40-22-13 for up to 55 kW loads or some higher power version of the similar type. The voltage rating of the auxiliary contacts must be suitable for the network voltage.

Download the Product Sheet from here: Trafox Superintend Offline IMD, EN (pdf)

Muuntosähkö Oy – Trafox is expanding its operations in the Joensuu area.

Trafox is a brand of Muuntosähkö Oy, under which we develop and manufacture high-quality transformers, chokes, filters and Trafox Superintend® monitoring devices with over 70 years of experience. Our production facilities are located in Helsinki (Finland), Joensuu (Finland), Viljandi (Estonia) and Suzhou (China).

In order to be able to meet the needs of both our domestic and export customers better in the future, we are increasing Trafox Group’s total production area to 23,000 m2 by opening a new 4,000 m2 factory in the Joensuu area, where we will move the production of Trafox Transformers and Trafox chokes of larger current and size classes.

In order to ensure the quality and safe development of our products in the future as well, we are starting preparations for the new factory by investing in new machines and testing equipment required by international electrical standards. After these important initial preparations, we start production in three separate phases:

1. In autumn 2024, we will first start with the Trafox air- and water-cooled Power Electronics chokes – max 3kA in the new premises.
2. Next up are Trafox air- and water-cooled Power Transformers, size class 500kVA – 3MVA.
3. Thirdly, our selection expands to Trafox Medium Voltage Reactors – max 11kV.

The new facility will be fully started, and all of these phases will be conducted in about two years.

With this remarkably increased capacity, we will also reorganize our current Joensuu production facility to ensure more space for our already strongly growing Monitoring device production. Our innovative Trafox Superintend fault current and insulation level monitoring devices are used by our customers in tens of thousands of different industrial, hospital, electric vehicle charging equipment, renewable energy, shipping, construction, and heavy industry applications around the world.

Best Regards,

Jyri Taskinen
Managing Director

TRAFOX_RELEASE_EN_060224 (pdf)

TRAFOX_TIEDOTE_FI_060224 (pdf)

NEW! Insulation Monitoring device IM-04PV for PV applications – now with voltage measurement!

Trafox Superintend® IM-04PV

NEW! NOW WITH VOLTAGE MEASUREMENT!

• Immune against disturbances (clouds and frequency disturbances), FFT
• For voltages up to 1500 VDC with high voltage couplers
• Quality and reliability from Finland
• Suitable also for other AC and DC high voltage systems
• NEW! Measurement of system voltage

To find out more information about these new products, please visit IMD Insulation Monitoring devices websites or contact sales@trafox.fi.

You can also download the brochure from here:  IM-04PV for Photovoltaic Applications, ENG (pdf)

NEW! Insulation Monitoring device IM-04DCCT for DC charging station – now with voltage measurement!

Trafox Superintend® IM-04DCCT

NEW! NOW WITH VOLTAGE MEASUREMENT!

• Designed to be used in demanding environments
• Measures the insulation resistance and capacitance of AC/DC networks
• Detects also symmetrical insulation faults
• Suitable for different application fields, for example
•      Electric vehicle DC charging stations
•      DC networks
• Nominal system voltage 0…1000 VDC
• N/C and N/O selectable
• Modbus RTU
• Automatic adaptation to the system leakage capacitance up to 5 uF
• Selectable start-up delay
• According to the standard IEC 61851-23
• NEW! Measurement of system voltage

IM-04DCCT – Insulation Monitoring device HVC-10 – High voltage couplerDownload the brochure from here: IM-04DCCT for DC charging station, ENG (pdf)