Brainboxes PX-246 Spezifikationen PDF herunterladen (Seite 29)

Installation – Terminal Description

4.1.7.1 CONNECTION TO TERMINALS 45 & 46/47

The function of terminals 45 & 46/47 change position depending upon wiring topology as follows:

Topology Pin No. Description Cable Size

No earth fault measuring

45 DO NOT CONNECT

46/47

Connect to s2 of the CTs connected to

L1,L2,L3,N

2.5mm²

AWG 13

Restricted earth fault measuring

Connect to s2 of the CTs connected to

L1,L2,L3,N

2.5mm²

AWG 13

46/47

Connect to s1 of the CT on the neutral

conductor

2.5mm²

AWG 13

Un-restricted earth fault measuring

(Earth fault CT is fitted in the neutral

to earth link)

Connect to s1 of the CT on the neutral

to earth conductor.

2.5mm²

AWG 13

46/47

Connect to s2 of the CT on the neutral

to earth link.

Also connect to the s2 of CTs connected

to L1, L2, L3.

2.5mm²

AWG 13

4.1.7.2 CT CONNECTIONS

p1,

or K is the primary of the CT that ‘points’ towards the SUPPLY

p2,

or L is the primary of the CT that ‘points’ towards the LOAD

s1 is the secondary of the CT that connects to the DSE Module’s input for the CT measuring

(I1,I2,I3)

s2 is the secondary of the CT that should be commoned with the s2 connections of all the other CTs

and connected to the CT common terminal of the module.

CT labelled as

p1,

or K

CT labelled as

p2,

or L

To Supply

To Load

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