Brainboxes PX-246 Spécifications télécharger pdf (Page 30)

Installation

Part No. 057-120 8660 OPERATING MANUAL ISSUE 1 07/05/2010 ADM

4.1.5 MAINS CURRENT TRANSFORMERS

WARNING! - Do not disconnect this plug when the CTs are carrying current. Disconnection will open

circuit the secondary of the C.T.’s and dangerous voltages may then develop. Always ensure the CTs are

not carrying current and the CTs are short circuit connected before making or breaking connections to the

module.

NOTE: - The 8600 series module has a burden of 0.5VA on the CT. Ensure the CT is rated for the

burden of the 8600 series controller, the cable length being used and any other equipment sharing the CT.

If in doubt, consult your CT supplier.

NOTE: - Take care to ensure correct polarity of the CT primary as shown below. If in doubt, check with

the CT supplier.

CT LABELLING

p1,

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

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 DSE8600 series modules.

DESCRIPTION CABLE

SIZE

NOTES

51 CT Secondary for Mains L1

2.5mm²

AWG 13

Connect to s1 secondary of L1 monitoring CT

52 CT Secondary for Mains L2

2.5mm²

AWG 13

Connect to s1 secondary of L2 monitoring CT

53 CT Secondary for Mains L3

2.5mm²

AWG 13

Connect to s1 secondary of L3 monitoring CT

54 DO NOT CONNECT

55 Common for CTs connected to L1,L2,L3 (s2)

2.5mm²

AWG 13

Connect to s2 secondary of L1,L2,L3 monitoring CTs

NOTE:- Take care to ensure correct polarity of the CT primary as shown overleaf. If in doubt, check

with the CT supplier.

CT labelled as

p1,

or K

CT labelled as

p2,

or L

To Supply

To Load

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Brainboxes PX-246 Spécifications Page 30

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