6
8. Current Transformer
Select the number of wires passing through the CT (Current Transformer) by using the following
table for best performance. When two motor leads pass through the CT, the current sensed by
the CT is twice the motor current flowing through the motor lead.
AC 200 ~ 230 Volt Motor
AC 400 ~ 460 Volt Motor
Motor
Capacity
(kW)
Motor
Capacity
(Hp)
TSBSS
TYPE
Wires
passing
through CT
Motor
Capacity
(kW)
Motor
Capacity
(Hp)
TSBSS TYPE
Wires
passing
through CT
0.1
1/8
TSBSA05
4
－
－
－
－
0.2
1/4
TSBSA05
3
0.2
1/4
TSBSA05
4
0.4
1/2
TSBSA05
2
0.4
1/2
TSBSA05
3
0.75
1
TSBSA05
1
0.75
1
TSBSA05
2
1.5
2
TSBSA10
1
1.5
2
TSBSA05
1
2.2
3
TSBSA10
1
2.2
3
TSBSA05
1
3.7
5
TSBSA30
１
3.7
5
TSBSA10
1
5.5
7-1/2
TSBSA30
1
5.5
7-1/2
TSBSA30
1
7.5
10
TSBSA60
1
7.5
10
TSBSA30
１
11
15
TSBSA60
1
11
15
TSBSA30
1
－
－
－
－
15
20
TSBSA60
1
－
－
－
－
18.5
25
TSBSA60
1
－
－
－
－
22
30
TSBSA60
1
Basic wiring diagram
M : T
HREE-PHASE
M
OTOR
MC : Magnetic contactor
ON : Start switch
OFF : Stop switch
Fuse : Fuse
Tr : Transformer
1. A transformer may be required, depending on
the voltage of Motor (i.e. over 250VAC)
2. Output relay is normally de-energized. When
Shock Relay trips, the contacts change state.
3. Two of three phases of the motor are passed
through the Shock Relay’s CT in the same
direction.
4. A fire might be happened as there is no
protection circuit in main circuit.
5. Please select a fuse capacity depending upon
capacity of a contactor MC to be connected.
M:
S
INGLE-PHASE
M
OTOR
Fuse
A
A
A
A
１
１
１
１
A
A
A
A
２
２
２
２