Ct Input - Omron KM1 User Manual

● CT input
PMU1A PMU2A
(Electric (Power
power) two-system)
○ ○
[PMU1A (electric power)]
When connecting dedicated CT, perform wiring as follows: between terminals [13] and [14],
[15] and [16], and [17] and [18] in single-phase 2-wire; phase R between terminals [13] and
[14] and phase T between terminals [17] and [18] in single-phase 3-wire or 3-phase 3-wire;
phase R between terminals [13] and [14], phase S between terminals [15] and [16], and
phase T between terminals [17] and [18] in 3-phase 4-wire.
In this case, terminals [13], [15], and [17] are specified as S, and terminals [14], [16], and [18],
as L.
Single
phase
2-wire
CT1([13]-[14])
CT2([15]-[16])
CT3([17]-[18])
Number of 3 circuits
measurement
circuits
[PMU2A (power two-system)]
When connecting dedicated CT to system 1, perform wiring as follows: between terminals
[13] and [14] and [15] and [16] in single-phase 2-wire; R phase between terminals [13] and
[14] and phase T between terminals [15] and [16] in single phase 3-wire or 3-phase 3-wire.
When connecting dedicated CT to system 2, perform the wiring as follows: between terminals
[17] and [18] in single-phase 2-wire; phase R between terminals [17] and [18] and phase T
between terminals [19] and [20] in single-phase 3-wire or 3-phase 3-wire.
In this case, terminals [13], [15], [17], and [19] are specified as S, and terminals [14], [16], [18],
and [20], as L.
Single
phase
2-wire
CT1([13]-[14])
CT2([15]-[16])
CT3([17]-[18])
CT4([19]-[20])
Number of 4 circuits
measurement
circuits
* In PMU2A, CT1 and CT2 are assigned for measurements in system 1, and CT3 and CT4
are assigned for measurements in system 2. If, for example, 4 circuits are measured in
single-phase 2-wire, CT1 to CT4 are used. Cross-wiring is therefore required between
systems 1 and 2.
EMU8A CTD8E
(Pulse/temperature) (CT
expansion)
× ○
Single 3-phase
phase
3-wire
3-wire
L R R
L - -
L T T
1 circuit 1 circuit
Single 3-phase
phase 3-wire
3-wire
L R R
L T T
L R R
L T T
2 circuits 2 circuits
O: With input X: Without input
3-phase
4-wire
R
S
T
1 circuit
2.5 Wiring
2-27