Specifications

With YR-8UNAA and 10UNAA, the 3-terminal-combined-with-CT model is of the movable iron core type.
The 4-terminal configuration can be manufactured for models combined with CT. Please designate as
“4-terminal.” However, the operation principle will be the rectifying type.
(1) A switch nameplate for 1-phase, 3-wire systems can be manufactured. Please specify “with 1-3
nameplate.”
Nameplate examples: OFFRNS OFFRNT Make sure to specify the indication contents when
ordering.
(2) Expanded scale refers to scales expanded three-fold.
(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.
Indicators with Changeover Switch
Mechanical Indicators
69
AC ammeters
Using AC ammeters with changeover switches, the currents of the respective phases 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 CT 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-8UNAA
102✕119
YR-10UNAA
122✕139
YR-12UNAA
Rectifier
1.5
100
0.4
2.5
70
0.2
2.5
50 and 60Hz
90
0.25
Ordinary




Expanded





Ordinary





Expanded





Ordinary





Expanded





Terminal configuration
4-terminal
3-terminal
Note 2
Maximum scale
1A
5A
10A
15A
20A
30A
/5A (indicator rating: 5A)
/1A (indicator rating: 1A)
Consumption VA
0.2
0.3
1.5
Combined
with CT
Direct
Standard
product
Immediate delivery
 Quasi-standard
product
Within 20 days
Special
product
21 to 60 days
Symbol
Reference delivery period
Delivery period classification
Rectifier (movable iron core)
Note 1
YR-10UNAAYR-8UNAA
Outer dimensions
Fig. 1 YR-8UNAA
Fig. 2 YR-10UNAA
Fig. 3 YR-12UNAA
Connection diagrams
Fig. 1 Direct
Fig. 2 Combined with CT
Fig. 3
4-terminal combined with CT (intermediate mounting)
Specify if 4-terminal
configuration is required.
Unnecessary in the case
of a direct indicator.
Model name
Indicator
rating
CT ratio
Cover type Special specifications
YR-8UNAA 5A
Terminal
configuration
4-terminal BR100/5A
Scale
0-100A
With 1-3 nameplate, colored
lines, colored bands, etc.
The items in must be specified.
Number of
units
10
OFF
R
S T
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)
C 1
+C 1 +C 3
C 3
Load
1
2
3
C 1
C 2
C 3
Load
CT
Note 3
1
2
3
To other
equipment
C 1
+C 1 +C 3
C 3
Load
CT
Note 3
1
2
3
OFF
R
ST
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
ST
Zero adjust button
122
122
17
15
50
2-M5 mounting screws
12.5
13.5
19
M4 terminal screw
f110
f113
50 50
50
50
2-f6
Panel hole opening dimensions
(as viewed from front face of the panel)
Note 1.
Note 2.
Remarks
For low-voltage circuits, grounding of the secondary
side of the current transformer is unnecessary.
Note 3.
Ordering method