EASKD 31.5 2U 3x500-250/5A 5-2,5VA Kl.0,5s - Billing current transformer

accuracy class

apparent power (VA)

primary current

Reset selection

Art. Nr.: 57621

Written inquiry

Export as PDF

Product information

The EASKD 31.5 2U 3x500-250/5A 5-2,5VA Kl.0,5s is a compact, high-precision billing current transformer of the proven EASKD series that can be switched between two primary currents, specially developed for use in power distribution, switchgear, meter panels and industrial measurement and monitoring systems.

Technical key features:

Type Billing current transformer (ring core type) – EASKD 31.5 2U
Transformation ratio 3x (500-250)/5 A (primary rated currents 500 A / 250 A, secondary rated current 5 A)
Rated power / burden 5–2.5 VA
Accuracy class accuracy class 0.5 s (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
Mounting Foot and rail mounting possible, including insulating protective cap

The EASKD 31.5 2U 3x500-250/5A 5-2,5VA Kl.0,5s is characterized by its very compact design, high reliability and excellent linearity – ideal for applications where precise billing and measurement at variable primary currents is required (e.g. medium-sized distribution boards, billing points, energy monitoring systems with moderate power requirements).

We are happy to supply this model from stock at short notice or configure further primary currents of the EASKD 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.

current 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.

Accuracy 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.