MM30-W
Doc. N° MO-0117-ING
Rev.
1
Pag.
17
of
29
Copyright - 2010 - Microener
13. MANUAL TEST OPERATION
13.1 - Mode "TESTPROG" subprogram "W/O TRIP"
Operation of the yellow key activates a complete test of the electronics and the process routines.
All the leds are lit-on and the display shows (TEST RUN). If the test routine is successfully
completed the display switches-over to the default reading (xx:xx:xx).
If an internal fault is detected, the display shows the fault identification code and the relay R5 is
deenergized. This test can be carried-out even during the operation of the relay without affecting the
relay tripping in case a fault takes place during the test itself.
13.2 - Mode "TESTPROG" subprogram "WithTRIP"
Access to this program is enabled only if the current detected is zero (breaker open).
Pressing the yellow key the display shows "TEST RUN?". A second operation of the yellow key starts
a complete test which also includes the activation of all the output relays.
The display shows (TEST RUN) with the same procedure as for the test with W/O TRIP.
Every 15 min during the normal operation the relay automatically initiates an auto test procedure
(duration
10ms). If any internal fault is detected during the auto test, the relay R5 is deenergized,
the relevant led is activated and the fault code is displayed.
WARNING
Running the
WithTRIP
test will operate all of the output relays. Care must be taken to ensure that no
unexpected or harmful equipment operations will occur as a result of running this test.
It is generally recommended that this test be run only in a bench test environment or after all
dangerous output connections are removed.
14. MAINTENANCE
No maintenance is required. Periodically a functional check-out can be made with the test procedures
described under MANUAL TEST chapter. In case of malfunctioning please contact
Microelettrica Scientifica Service or the local Authorised Dealer mentioning the relay's Serial No reported
in the label on relays enclosure.
WARNING
In case of Internal Relay Fault detection, proceed as here-below indicated :
If the error mes
sage displayed is one of the following “DSP Err”, “ALU Err” ,”KBD Err” ,”ADC Err”,
switch off power supply and switch-on again. If the message does not disappear send the relay to
Microelettrica Scientifica (or its local dealer) for repair.
If the error me
ssage displayed is “E2P Err”, try to program any parameter and then run “W/OTRIP”.
If message disappear please check all the parameters.
If message remains send the relay to Microelettrica Scientifica (or its local dealer) for repair.
15. POWER FREQUENCY INSULATION TEST
Every relay individually undergoes a factory insulation test according to IEC255-5 standard at
2 kV, 50 Hz 1min. Insulation test should not be repeated as it unusefully stresses the dielectrics.
When doing the insulation test, the terminals relevant to serial output must always be short circuited to
ground. When relays are mounted in switchboards or relay boards that have to undergo the insulation
tests, the relay modules must be drawn-out of their enclosures and the test must only include the fixed
part of the relay with its terminals and the relevant connections.
This is extremely important as discharges eventually tacking place in other parts or components of the
board can severely damage the relays or cause damages, not immediately evident to the electronic
components.
