Art-Nr.: 7014
ASK 31.3 150/5A 2,5VA Kl.0,5 - Plug-on current transformer
The plug-on current transformer ASK 31.3 150/5A 2,5VA Kl.0,5 is a compact, high-precision low-voltage measuring transformer of the proven ASK series, specially developed for use in power distribution, switchgear, meter panels and industrial measuring and monitoring systems.
Technical main features:- Type plug-on current transformer (Clip-on Type) – ASK 31.3
- Transformation ratio 150/5 A (primary rated current 150 A, secondary rated current 5 A)
- Rated power / burden 2,5 VA
- Accuracy class Kl. 0,5 (according to IEC/EN 61869-2 or DIN EN 61869-2)
- Maximum operating voltage Um ≤ 0,72 kV
- Rated frequency 50–60 Hz
- Thermal rated continuous current Icth = 1,0 × Ipr (continuous current 1 × primary rated current)
- Thermal rated short-time current Ith = 60 × Ipr, 1 s
- Insulation class E
- Insulation test voltage 3 kV, 50 Hz, 1 min
The ASK 31.3 150/5A 2,5VA Kl.0,5 stands out for its very compact design, high reliability and excellent linearity – ideal for applications where precise measurement is required at medium currents (e.g. busbar mounting in distribution boards, measuring stations, energy monitoring systems with moderate power requirements).
We will be happy to supply this model from stock at short notice or configure further primary currents of the ASK series for you.
Contact us for your individual quote!
3D models and more files to each product can be found in our download area downloadarea
current transformer knowledge
Background knowledge on the selection, dimensioning and technical parameters of current transformers – prepared in a practical manner.
Read morecurrent transformer correctly select & dimension
Published on 10 July 2026 · Updated on 31 July 2026
The choice of the suitable current transformer depends on primary current, connection values and purpose of use. This guide leads step by step through the most important selection criteria.
Read moreAccuracy classes for current transformers explained
Published on 10 July 2026 · Updated on 31 July 2026
What do specifications like class 0,5 or 0,2s mean for a current transformer? An overview of the common accuracy classes and their areas of application.
Read moreStromwandler richtig anschließen
Published on 24 September 2026 · Updated on 25 September 2026
Ein Stromwandler misst nur dann richtig, wenn er in der richtigen Richtung eingebaut und sekundärseitig korrekt verdrahtet ist. Entscheidend sind drei Punkte: Die Primärklemme P1 (K) zeigt zur Einspeisung, die Sekundärkl…
Read moreCurrent transformer for photovoltaic systems
Published on 10 July 2026 · Updated on 31 July 2026
In current measurement in PV systems, current transformers are used for recording feed-in, reference and consumption currents. Here you will learn what to pay attention to when selecting and dimensioning.
Read more