WIKA CF1H - Manual (Page 62)

Operating Instructions Temperature Indicating Controller CF1H
V 1.2
•
01/2007 - 62 -
• Current transformer (CT1, CT2) input [Option code: W12, W15, W32 or W35]
(1) This alarm is not available for detecting current under phase control.
(2) Use current transformer (CT) an accessory one, and pass one lead wire of
heater circuit into the hole of the CT.
(3) When wiring, keep CT wire away from AC source and load wire to avoid
the interference from external.
In the case of single phase heater
CT1 CT1 input connector
Power
source
Heater [Fig 11.2-3]
In the case of 3-phase heater
[Fig 11.2-4]
[Fig
11.2-5]
3-phase
heater
CT1
CT2
R
S
T
Power
source
CT1 input connector
CT2 input connector