Specifications

Mechanical Indicators
90
Example of using one LM-11ZNAV (LM-11YNAV) unit Example of using three LM-11ZNAV (LM-11YNAV) units
INPUT
OUTPUT
Nameplate
130
115
100
70
R3
R3
100
6
6
M4 terminal screw
12 12
6 6
12 12
1.2
89
113
16
150
11.5
12.5
12.5
11.5
100
A
C
T-150 rectifier
Outer dimensions of accessory
RESET
A
Switch Note 1
Power supply for electromagnetic
marker needle reset
C
T-150 rectifier
Load
Note 2
CT
Fig. 1 AC ammeter
Connection diagrams
RESET
A
C
VT
Switch Note 1
Power supply for electromagnetic
marker needle reset
T-150 rectifier
Load
Note 2
Fig. 2 AC voltmeter
RESET
Switch Note 1
Power supply for electromagnetic
marker needle reset
Load
Fig. 3 DC ammeter
RESET
CT
T-51HAA
transducer
Auxiliary power
supply
INPUT
OUTPUT
SOURCE
A
MA
MB
Power supply for electromagnetic
marker needle reset
Load
Note 2
Switch Note 1
Fig. 4 Receiving indicator
Shown below are connection examples of the LM-11ZNAV AC voltmeter with the maximum needle (or LM-11YNAV AC voltmeter
with maximum/minimum needles) as a ground voltmeter.
A Vaf voltage (voltage at open end of  connection) is input into the indicator.
Operation • For single-wire, grounded state: the indicator gives a reading
corresponding to the line voltage.
• After restoration: the degree of grounding can be checked using
the maximum value marker needle.
The voltages at the respective sides of a
 connected transformer are input into
the indicators.
Operation • Normal — All three indicators indicate a reading corresponding to
the primary line voltage
✕ 1/ .
• For single-wire, grounded state: the value at the indicator of the
phase corresponding the ground phase is zero, and the remaining
two indicators give readings corresponding to the line voltage
values.
• After restoration — The maximum value marker needles of two
units indicate values greater than the driving needles and thus the
ground phase and the degree of grounding can be checked.
3
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
⎛
⎜
⎜
⎜
⎜
⎜
⎝
⎞
⎟
⎟
⎟
⎟
⎟
⎠
6600V
V
Vaf
6600V
V
V
V
Vaf
LM-11ZNAV 110V 0-6600V / / V B 60HzVAF110V 3
6600
3
110
3
110
3
Model name Indicator rating
Scale Cover type Zero-phase voltageVT ratio Frequency
The items in must be specified.
Ground voltmeter
Number of
units
Ordering method
Using LM-11ZNAV or LM-11YNAV AC voltmeter as a ground voltmeter
Note 1.
Note 2.
Connect if an electromagnetic marker needle resetting circuit is to be provided. Additionally, use a switch that “opens” when released.
In a low voltage circuit, grounding of the secondary sides of the instrument voltage transformer and current transformer is unnecessary.