Specifications
Mechanical Indicators
72
Specifications
Indicator type
Model name
Operation principle
Accuracy (driving needle) (grade)
Consumption
VA
Marker needle reset
Weight (kg)
Delivery period classification
AC ammeters
Scale
length
(mm)
Demand meter
Instantaneous meter
Indicator rating
Time interval (min)
50
AC voltmeters
LB-8ZNAA
—
—
LB-11ZNAA
—
—
LB-11ZRNAA
—
LB-8ZNAV
—
—
LB-11ZNAV
—
—
LB-11YRNAV
Bimetal (Rectifying instantaneous meter) Bimetal (Rectifying instantaneous meter)
2.5
107
1.5
150
—
5A, 50 and 60Hz
2
4
15
9
2
4
5
8.5
10
9
15
9
2
4.5
5
9
10
9.5
15
9.5
2
4
approx. 15
2
4
approx. 5
2
4.5
approx. 5
approx. 15 approx. 5 approx. 5
1.3
1.4
1.5
1.3
Manual and electromagnetic reset (electromagnetic reset rating: 100-110VAC/DC ±10%)
1.4
1.8
150V, 50 and 60Hz
50—
2.5
107
1.5
150
Needles
Marker
needles
Max. value
Min. value
Instantaneous meter
Main indicator unit (VA)
Electromagnetic reset (VA)
Standard
product
Immediate delivery
Quasi-standard
product
Within 20 days
Special
product
21 to 60 days
Symbol
Reference delivery period
Delivery period classification
AC ammeters Time intervals: 2, 5, 10 and 15 minutes
(LB-8ZNAA: 2 and 15 minutes)
The demand current and instantaneous current can be measured and maximum demand current
can be recorded. AC ammeters can also be used for load monitoring; for example, monitoring the
load of voltage transformers or feeders.
AC voltmeters Time interval: 2 minutes
The average and instantaneous voltages can be measured, and maximum and minimum voltages
can be recorded. AC voltmeters can also be used to monitor voltage fluctuation in low-voltage bus
lines and high-voltage circuits.
AC ammeters/AC voltmeters
LB-11YRNAV
(with max. and min. value marker
needles and instantaneous meter)
LB-11ZRNAA
(with max. value marker needle
and instantaneous meter)
Fig. 1 LB-8ZNAA and LB-8ZNAV
Fig. 2 LB-11ZNAA, LB-11ZRNAA, LB-11ZNAV and LB-11YRNAV
Outer dimensions
Fig. 1 AC current demand meter
Fig. 2 AC voltage demand meter
Connection diagrams
Model name
LB-11ZNAA
Indicator rating
5A
Time interval
2M
Scale
0-200A
CT ratio or VT ratio
200/5A
Special specifications
Cover type
B
Colored lines, colored
bands, etc.
The items in must be specified.
Number of
units
3
Max. value
marker needle
(red)
Driving needle
(black)
Zero adjust knob
Mounting bracket
2-M4 fixing screws
M4 power supply
terminal screw after
electromagnetic
marker needle reset
M4 input
terminal screw
Panel hole opening
dimensions
Mounting bracket
Manual pushbutton
marker needle reset
80
80
72
74
21.5
185
12.5
74
INPUT
RESET
Max. value marker needle (red)
Driving needle
(black)
Instantaneous meter needle (black)
Only with the LB-11YRNAV
Min. value marker needle (green)
only with LB-11YRNAV
Zero adjust knob
4-M5 mounting screws
Depth dimension
f100
26.3
17.3 15
M4 power supply terminal
screw for electromagnetic
marker needle reset
M4 input terminal screw
Panel hole opening dimensions
Manual pushbutton
marker needle reset
110
110
45
4-f6
f104
45
90
45 45
90
RESET
INPUT
A
C
Load
Note 2
CT
INPUT
RESET
Note 1
Switch
Power supply for electromagnetic
marker needle reset
Load
Power supply for electromagnetic
marker needle reset
Note 2
Note 1
Switch
VT
INPUT
RESET
C
A
AC ammeters
Time interval LB-11ZNAA LB-11ZRNAA
2min/15min
5min/10min
175
202
195
225
2min 175 225
LB-11ZNAV LB-11YRNAV
Time interval
AC voltmeters
Depth
dimension
Remarks
(1) The instantaneous meter of the AC ammeter has an ordinary scale.
(2) The scale of the instantaneous meter of the AC voltmeter is magnified for the rated voltage range
from approx. 80V to 150V.
(3) 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.
Ordering method
Note 1.
Note 2.
Connect if an electromagnetic
marker needle reset circuit is to be
provided. Additionally, use a switch
that “opens” when released.
For low-voltage circuits, grounding
of the secondary sides of the
instrument voltage transformer and
current transformer is unnecessary.