ADR233B
Ref ID : ADR233B/IM/I&P
Rev No. : 05
Page No. : 51 of 479
Figure 13: Terminal blocks used in Basic Version
Caution: Always fit an insulating sleeve over the ring terminal.
Current transformers would generally be wired with 2.5 mm2 PVC insulated multi-stranded
copper wire terminated with M5 ring terminals. The wires should be terminated with rings using
90º ring terminals, with no more than two rings per terminal.
Due to the physical limitations of the ring terminal, the maximum wire size you can use is 4.0
mm2 using ring terminals.
The wire should have a minimum voltage rating of 300 V RMS.
Caution: Current transformer circuits must never be fused.
Note 1: Terminal blocks must not be detached whilst any current transformer (CT) circuit is live. CT
shorting must be achieved by external means; the product does not include this facility.
Note 2: For 5A CT secondary, we recommend using 2 x 2.5 mm
2
PVC insulated multi-stranded copper
wire.
Auxiliary Power Input / Output Connections
The terminal block of ADR233B used for Auxiliary supply, Status input, relay output contacts is
as shown below. The wires should be terminated with straight pin type lugs, with no more one
lug per terminal.
Figure 14: Terminal blocks for Auxiliary Supply, Input/ Output for E0
These should be wired with 1 mm2 PVC insulated multi-stranded copper wire terminated with
M4 straight pin type lugs.
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