ET3KOL / ET1KOL — Railway LV Transformers for Signalling Devices
Country: Poland · Model: ET3KOL / ET1KOL
Three-phase ET3KOL and single-phase ET1KOL serve to supply railway signalling and automation devices, with primary and secondary voltage up to 1 000 V. Insulation class F (155 °C), version C2/E1, frequency 50/60 Hz. They are installed in control cabinets, technical containers and railway cars.
- Types
- ET3KOL (three-phase), ET1KOL (single-phase)
- Voltage
- primary and secondary up to 1 000 V
- Frequency
- 50/60 Hz
- Insulation class
- F (155 °C)
Technical specifications
| Types | ET3KOL (three-phase), ET1KOL (single-phase) |
|---|---|
| Voltage | primary and secondary up to 1 000 V |
| Frequency | 50/60 Hz |
| Insulation class | F (155 °C) |
| Climate | C2/E1, 45 °C |
| Degree of protection | IP00; enclosures IP23/IP44/IP54 |
| Standard | EN/IEC 61558-2-4 |
| Factory certificates | ISO 22163:2023, EN 15085-2 |
Replacement for
ST-4, SOBS-2A, POBS-2A (railway signalling), OM-1.25/10 (railway signalling supply)
selected by purpose and main parameters, please confirm with the manager
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
ET3KOL supply automatic line blocking devices and are installed at both ends of the supply line of train traffic control systems. The transformer is fixed with mounting angle brackets, so it is easy to build into a cabinet, a container or a railway car structure. The terminals are placed on one or both sides, which simplifies matching the connection scheme. There is no standard enclosure, the degree of protection is IP00 and the protection class I, and to order IP23, IP44 or IP54 enclosures are added against vibration, dust, moisture and temperature swings. Made to EN/IEC 61558-2-4, with an ambient temperature of 45 °C. Aluminium or copper windings are impregnated with epoxy resin by dipping or by the VPI method. The factory holds the ISO 22163:2023 and EN 15085-2 certificates for the railway sector.
How to choose
The type is determined by the network: a three-phase line needs ET3KOL, a single-phase one ET1KOL. Then look at the installation site. In an equipped cabinet IP00 is enough, and for an open location or a railway car IP23, IP44 or IP54 is chosen. Parameters outside the data sheet are made after agreement. If supply from rectifiers is needed, take rectifier transformers, and for marine networks ET3SM.
Request a price and lead time
ET3KOL / ET1KOL — Railway LV Transformers for Signalling Devices. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How does ET3KOL differ from ET1KOL?
ET3KOL is three-phase, ET1KOL is single-phase. Both are designed for primary and secondary voltage up to 1 000 V and a frequency of 50/60 Hz.
What insulation class and climatic version do these transformers have?
Insulation class F (155 °C), climatic version C2/E1 at an ambient temperature of 45 °C.
What enclosure is needed for railway cabinets and cars?
The standard degree of protection is IP00. To order, IP23, IP44 or IP54 enclosures increase resistance to vibration, shocks, dust and moisture.
To which standard are the railway LV transformers made?
To EN/IEC 61558-2-4. The factory is certified to ISO 22163:2023 and EN 15085-2.
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Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.