Winco DSE7300 Series - Manual (Page 30)

DSE Model 7000 Series Control and Instrumentation System Operators Manual
30 Part No. 057-074 7000 Series OPERATING MANUAL ISSUE 5 15/10/2009 ADM
4.2.6 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 7000 series module has a burden of 0.5VA on the CT. Ensure the CT is rated for the burden
of the 7000 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,
k or K is the primary of the CT that ‘points’ towards the GENERATOR
p2,
l 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 DSE7000 series modules.
CT labelled as
p1,
k or K
CT labelled as
p2,
l or L
To Supply
To Load