Installation
13
4.1.6 CURRENT TRANSFORMERS
Current transformers are fitted in the feed from the transfer switch to the load. They are used to give S1
instrumentation when S1 is on load, and S2 instrumentation when S2 is on load.
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 TemTransfer 2 module has a burden of 0.5VA on the CT. Ensure the CT is rated for the
burden of the TemTransfer 2 series controller, the cable length being used and any other equipment
sharing the CT. If in doubt, consult your CT supplier.
NOTE:- When not required, the CT function can be disabled using the Configuration Suite PC Software.
PIN No
DESCRIPTION
CABLE SIZE
NOTES
34
I1 Current Transformer
1.0mm²
AWG 18
Connect to CT 1 (s1 /
k
)
35
I2 Current Transformer
1.0mm²
AWG 18
Connect to CT 2 (s1 /
k
)
36
I3 Current Transformer
1.0mm²
AWG 18
Connect to CT 3 (s1 /
k
)
37
Current Transformer common
connection
1.0mm²
AWG 18
Connect to CT common (s2 /
l
)
37 & 38 are internally connected to each other.
38
NOTE:- Take care to ensure correct polarity of the CT primary as shown below. If in doubt, check with
the CT supplier.
CT labelled as
p1,
k
or K
CT labelled as
p2,
l
or L
To Supply
To Load
