Reference
European Current Transformer Cross Reference
CTB Um < 1.0 kV, 6 kV isolation test, -5 °C to +50 °C
ASR tube 30 A to 1000 A, class 0.2 / 0.5s / 0.5 / 1 / 3
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EFEN series
EFEN Current Transformer Cross Reference
The German fuse switch specialist's transformer range, including the blocks that integrate a CT into a vertical NH fuse switch. Reference only.
Reference page. EFEN Current Transformer Cross Reference is described here so buyers can identify an existing part. It is not sold by QIANWEI®.
- Window typeUp to 5000 A primary
- Tube typeUp to 600 A primary
- Special purposeWound primary and summation transformers
- Fuse switch blocksE3-NH sizes 00 to 3
- StatusReference only, not sold by QIANWEI
Product Overview
EFEN GmbH was founded in 1922 by Otto Frees in Neudorf, today known as Martinsthal. The original activities concentrated on the assembly of electrical fuses for the automotive industry, and the portfolio expanded to fuses for all kinds of applications including current limiting fuses for low and medium voltage power distribution systems. EFEN was purchased by the WICKMANN Group in 1985, and a second location, EFEN Uebigau, was established in eastern Germany in April 1992.
The transformer portfolio covers window type current transformers for primary currents up to 5000 A and tube type current transformers up to 600 A for line metering or vertical design NH fuse switches, also available in PTB compliant variants for billing purposes; special purpose wound primary current transformers for higher classes and powers, and summation current transformers for up to 10 window type current transformers; and transformer blocks for E3-NH vertical design NH fuse switches, from rear side installation in size 00 to the compact design for the terminal space of sizes 1 to 3.
Specification available on request.
FAQ
Questions Buyers Ask
What is a summation current transformer?
One that adds the outputs of several current transformers into a single secondary, so one meter can read the total of several circuits. EFEN publishes summation transformers for up to ten window type CTs; the MBS reference page lists the KSU and SUSK equivalents.
Do you sell EFEN products?
No. This page is a cross reference.
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