15
JEP0-IL9554
Handling precautions
1. Panel mounting
①
Be sure to connect the "E" terminal of the relay to D-
class grounding.
②
The relay of unit-drawer type (RD type) can be drawn
out from the case.
2.
Use and operation
①
About the setting switches for using condition, factory
settings are set to a default of OFF. So it is necessary
to set the switches according to the conditions.
②
Please refrain from changing the setting value during
operation, since unwanted operation may occur. However,
if the setting change is unavoidable, please press the
CPU reset button in order to lock the relay function.
③
Don't leave rotary switches with halfway (indefinite)
state.
④
The RUN LED lights up in the normal condition when the
rated auxiliary power supply is input. If it still turns
off when the auxiliary power supply voltage exceeds 85V,
please contact our local agent and branch office since
the relay may fail.
3.
Connection of V
0
input terminal
①
Be sure to connect the V
0
input terminal (Y1-Y2) to the
MPD-3 type ZVT or the MDG relay supplying V
0
when turning
on the relay power supply.
Test
A relay test is carried out sufficiently before shipment,
but at the following cases, it is recommended the test
should be carried out again.
a.
When the products are delivered and unpacked
b.
At the time of starting operation of equipment
c.
At the time of periodic inspection (Usually once a
year)
1. At the time of testing
①
The input waveform should be a sine wave with little
distortion.
②
During the test, set the position of the indicator
select switch to "V
0
MEASURE", "I
0
MEASURE", "PHASE
MEASURE", or "PICKUP". Set the other setting switches
according to the test conditions of the operating
characteristic control point.
③
If user-defined control point is specified (e.g.
accuracy of relay characteristic is controlled at
service conditions), execute the test at the
manufacturer-defined characteristic control point
before in-service operation and then check accuracy of
the relay. After that, execute the test at the user-
defined control point, and use this data as a later
reference.
④
Perform the test in combination with ZCT (MZT type) and
ZVT (MPD-3 type). Otherwise, direct input to the relay
may cause burning out.
2. Withstand voltage test
a. Please disconnect the relay from ZCT and ZVT. If a
voltage higher than the rated value is applied, it
may burn out.
b. Apply 2000V AC (commercial frequency) between all
circuits and earth (E terminal) for one minute, and
make sure that there is no problem.
Voltage applied terminals
c. Apply 2000V AC (commercial frequency) between separate
circuits for one minute, and make sure that there is
no problem.
Voltage applied terminals
Note) Never apply a test voltage between these circuits.
～
,
～
,
～
E
a12
Y1
Z1
M
a11
P1
P1
P2
Y1
Y2
Z1
Z2
M
N
P1
P2
P1
P2
P1
P2
a11
a21 a22
a12
a11
a21 a22
a12
Y1
Y2
M
N
a11
a21 a22
a12
a11
a21 a22
a12
Z1
Z2
a22
Y2
Z2
N
a21
P2
Y1 Y2
Z1 Z2
Y1 Y2
M
N
Z1 Z2
M
N
