User Manual

26
4.4.6 CT Input
CT input is available when Heater burnout alarm (C5W, EIW, W options) is ordered.
Cannot be used for detecting heater current under phase control.
BCS2
BCR2, BCD2
Use the CT (current transformer) provided, and pass one lead wire of the heater circuit
into the hole of the CT. (Fig. 4.4.6-1)
When wiring, keep the CT wire away from AC sources or load wires to avoid the external
interference.
BCS2
(Fig. 4.4.6-1)
If using 3-phase, pass any 2 lead wires of R, S, T into the CT, and connect them to
CT1 (
13
-
14
) and CT2 (
14
-
15
) terminals. (Fig. 4.4.6-2)
(Fig. 4.4.6-2)
CT1 input terminals
Power supply
CT
Heater
13
14
Power supply
CT1
Heater
13
ガ
ス
ケ
ッ
ト
14
15
ガ
ス
ケ
ッ
ト
R
S
T
CT2
CT1 input terminals
CT2 input terminals