Specifications

Mechanical Indicators
39
Overall Connection Examples
2. 3-phase, 3-wire circuit (2CT)
Note 1
+C1 C1 +C3 C3
+C1 C1 +C2 C2 +C3 C3
+C1 C1 +C3 C3
1S
k
k
RR
1L
3S
CT
3
L
Current changeover switch (terminally mounted)
Current changeover switch (intermediately mounted)
Load
(R)
1
(S)
2
(T)
3
The VT portion in the case of using an EVT or other Y-Y connection VT is as shown below.
Voltage changeover switch
Load
P2 P3 P1
Note 1
VT
(R)
1
(S)
2
(T)
3
AC voltmeter YS-12NAV type (LS-110NAV type)
AC ammeter YS-12NAA type (LS-110AA type)
AC ammeter YS-12NAA type (LS-110AA type)
Frequency meter YP-12NF type (LP-110NF type)
Power-factor meter YP-12NPFU type (LP-110NPFU type)
Varmeter YP-12NVAR type (LP-110NVAR type)
Watthour meter 3-phase 3-wire type
Wattmeter YP-12NW type (LP-110NW type)
P2 P3 P1
U
V
U
V
U
V
U
V
VT
Note 1
P
2 P3P1P2 P3P1P2 P3P1P2 P3P1
Note 1. Grounding of the secondary sides of the instrument voltage transformer
and the current transformer is not necessary in a low voltage circuit.