DSE DSE7210, Operator'S Manual, Page: 36 / 160

DSE7200 / 7300 Series Operators Manual
36
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