Winco DSE71xx Series User Manual

Page 15

DSE Model 71xx Series Control & Instrumentation System Mk2 Operators Manual

Part No. 057-113 71xx Series OPERATING MANUAL ISSUE 2 12/08/2010 ADM

4.1.7 GENERATOR 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 7100 series module has a burden of 0.5VA on the CT. Ensure the CT is rated for the burden

of the 7100 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 GENERATOR

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 DSE7100 series modules.

Generator I1 Current Transformer

1.0mm²

AWG 18

Connect to generator CT 1 (s1)

Generator I2 Current Transformer

1.0mm²

AWG 18

Connect to generator CT 2 (s1)

Generator I3 Current Transformer

1.0mm²

AWG 18

Connect to generator CT 3 (s1)

Generator Current Transformer
common connection

1.0mm²

AWG 18

Connect to generator CT common (s2)

NOTE:- Terminals 54 and 55 are internally connected to each other.

NOTE:- Terminals 56-59 are not fitted to the DSE7100 series.

CT labelled as
p1,

or K

CT labelled as
p2,

or L

To Supply

To Load