Specifications

Mechanical Indicators
70
AC voltmeters
Using AC voltmeters with changeover switches, the voltages between the respective wires of a
3-phase, 3-wire system (or 1-phase, 3-wire system) circuit can be measured by a single meter.
Equipped with a protective circuit to protect the VT secondary circuit.
Specifications
Size (width ✕ height) mm
Model name
Operation principle
Accuracy (grade)
Frequency
Scale length (mm)
Weight (kg)
Indicator rating and delivery period classification
82✕99
YR-8UNAV
102✕119
YR-10UNAV
122✕139
YR-12UNAV
Rectifier
2.5
70
0.15
2.5
50 and 60Hz
90
0.2












VT ratio
440/110V
3300/110V
6600/110V
besides the above, 110V
Scale
0-600V
0-4500V
0-9000V
VT ratio ✕ 150V
Consumption
VA
0.5
1.2
2.4
0.5
0.5
Maximum scale
150V
300V
600V
Delivery period classification
1.5
100
0.4
Combined
with VT
Direct
Standard
product
Immediate delivery
 Quasi-standard
product
Within 20 days
Special
product
21 to 60 days
Symbol
Reference delivery period
Delivery period classification
YR-10UNAVYR-8UNAV
Outer dimensions
Fig. 1 YR-8UNAV
Fig. 2 YR-10UNAV
Fig. 3 YR-12UNAV
Connection diagrams
Fig. 1 Direct
Fig. 2 Combined with VT
Unnecessary in the case of a direct indicator.
Model name VT ratio
Cover type Special specifications
YR-8UNAV 150V B440/110V
Scale
0-600V
With 1-3 nameplate, colored
lines, colored bands, etc.
Indicator
rating
The items in must be specified.
Number of
units
10
OFF
R-S
S-T T- R
Zero adjust button
82
17
82
10
60
2-M3 mounting screws
12.5
13.5
14.5
M4 terminal screw
f65.5
f67
32 32
32 32
2-f4
Panel hole opening dimensions
(as viewed from front face of the panel)
OFF
R-S
S-T T-R
Zero adjust button
102
102
17
10
60
2-M4 mounting screws
12.5
13.5
14.5
M4 terminal screw
f85
f88
4040
4040
2-f5
Panel hole opening dimensions
(as viewed from front face of the panel)
OFF
R-S
S-T T-R
Zero adjust button
122
f110
17
15
50
2-M5 mounting screws
12.5
13.5
19
M4 terminal screw
122
f113
50 50
50
50
2-f6
Panel hole opening dimensions
(as viewed from front face of the panel)
12
3
Load
P
1
P3
P2
12
3
Load
P
1
P3
P2
Note 1
VT
(1) In the case of a 1-phase, 3-wire system circuit (100/200V), use a model rated at 300V direct.
(2) A switch nameplate for 1-phase, 3-wire systems can be manufactured. Please specify “with 1-3
nameplate.”
Nameplate examples: OFF R-N N-S R-S OFF R-N N-T R-T Make sure to specify the indication
contents when ordering.
(3) Supplementary anti-corrosion treatment is not possible.
(4) Please make sure to read the “Safety Precautions” (pp.5-8) and the “Selection Precautions” (p.9) to assist in
selecting the model and use specifications suited to the application.
Remarks
Ordering method
For low-voltage circuits, grounding of the secondary side
of the instrument voltage transformer is unnecessary.
Note 1.