Mitsubishi Electric MELPRO A Series Instruction Manual page 11

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
①The input waveform should be a sine wave with little
distortion.
②During the test, set the position of the indicator
select switch to "V MEASURE". 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),
manufacturer-defined
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.
2. Withstand voltage test
a. Apply 2000V AC (commercial frequency) between all
circuits and external box (fixing screw for mounting)
for one minute, and make sure that there is no problem.
Voltage applied terminals
b c
a
1 1 1
P1
b c
a
2 2 2
P2
b. Apply 2000V AC (commercial frequency) between separate
circuits for one minute, and make sure that there is
no problem.
Voltage applied terminals
P1 P2
execute the test
characteristic control
External box
(Fixing screw for
mounting)
b c a
1 1
1
b c a
2 2
2
3. Operation characteristics test
①When the test voltage is gradually increased, the RUN
display LED (green) lights at around 50V. This indicates
that the relay has started working properly.
②By turning the indicator select switch to "TEST" and
pushing "TEST" button for 2 seconds or more, output
contact can be forced to operate (except for the case
of LOCK setting).
4. Operation characteristic control point
Perform the test periodically according to the following
test conditions and criteria.
Test item
Operation
value
Reset
value
at the
point
Rated voltage
Operating
time
70% of setting
11
Test condition
Operation Operating
Input
value time
Each Minimum
-
setting setting
Maximum Minimum
-
setting setting
Maximum Minimum
setting setting
↓
Maximum 0.2s or
setting more
Criteria
±5% of
setting value
105% or less
of operating
value
±20ms of
setting time
±10% of
setting time
JEP0-IL9556