ASR series

ASR Current Transformer

The tube body: a round primary conductor passes through, the case snaps onto the DIN rail, and the secondary terminals are covered before the panel door closes.

Primary range40 A to 600 A
Secondary1 A or 5 A
MountingDIN rail or foot mounted
FramesASR20.3, ASR21.3, ASR22.3
Terminal coversSnap fit

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Product Overview

ASR tube current transformers are DIN rail mounted or foot mounted with snap fit secondary terminal covers. Three frames are published, defined by transformer width, maximum conductor diameter and primary range, with 1 A or 5 A secondaries.

Application Scenarios

Panel metering on round conductors
DIN rail control gear
Sub distribution boards

Technical Features

DIN rail mounted or foot mounted
Snap fit secondary terminal covers
Round conductor primary from 21 mm to 22.5 mm diameter

Specifications

Frame ladder

Frame	Width	Max conductor	Primary range
ASR20.3	44 mm	21 mm dia.	50 A to 300 A
ASR21.3	48.5 mm	22.5 mm dia.	100 A to 600 A
ASR22.3	60 mm	22.5 mm dia.	40 A to 600 A

FAQ

Questions Buyers Ask

What is a tube current transformer?

One where the primary is a round conductor passing through a tubular aperture, rather than a rectangular busbar window. It suits cable rather than bar.

Which frame for a 22 mm cable?

ASR21.3 or ASR22.3, both rated for a 22.5 mm maximum conductor diameter.