13
DIAGNOSTICS AND TROUBLESHOOTING
DANGER!
Cet équipement a des tensions élevées pouvant causer des décharges électriques. Seul un personnel qualifié et familier
avec l’onduleur de fréquence the MVW01 et ses équipements associés doit préparer et mettre en oeuvre l’entretien de
cet équipement. Afin d’éviter un risque de décharge électrique, suivez toutes les procédures de sécurité requises pour
l’entretien courant sur un équipement sous tension.
Ne touchez aucun circuit électrique avant de vous être assuré qu’il est hors tension.
This type of maintenance is also intended for the cleaning and visual inspection of the high voltage cabinets; therefore, it requires the complete
de-energization of the inverter. In order to de-energize the inverter and clean the medium voltage panels, the instructions contained in Section
13.3 SAFE DE-ENERGIZATION INSTRUCTIONS on page 13-5 must be followed.
Its frequency can be lower than the preventive maintenance in operation.
Procedures:
1. Execute the procedures 1 and 4 of the Preventive Maintenance During Operation.
2. Follow the instructions in Section 13.3 SAFE DE-ENERGIZATION INSTRUCTIONS on page 13-5 .
DANGER!
Although the inverter commands the opening of the input switchgear, there is no guarantee of its opening and neither that
no voltages are present, because the capacitors remain charged for a long time, and they can also be charged through
the auxiliary low voltage supply. Before opening and accessing the high voltage cabinets, follow all the safe de-energization
procedures described next.
DANGER!
Bien que l’onduleur commande l’ouverture du coupe-circuit d’entrée, il n’y a aucune garantie qu’il s’ouvrira ni qu’aucune
tension n’est présente, car les condensateurs restent chargés pendant longtemps et ils peuvent également être chargés par
l’alimentation basse tension auxiliaire. Avant d’ouvrir et d’accéder aux armoires moyenne tension moyenne, suivez toutes
les procédures de mise hors tension de sécurité décrites ci-dessous.
Table 13.2 on page 13-4 shows the periodic preventive maintenance procedures under stop and de-energization condition.
Table 13.2: Intervals and procedure of the preventive maintenance with stop and de-energization
Interval Items Procedure
Every 12 months
Internal panel
cleanliness
(1)
Electronic boards: use only an antistatic brush;
Insulating materials, bars and air ducts: use an air blower
and a flannel moistened with isopropyl alcohol. Avoid using
compressed air, as it could contaminate the panels with oil or
humidity;
Power cables: use a dry flannel;
Fins of the power cells heat sinks
(2)
: use an air blower;
Exhausters and fan: use air blower and a flannel moistened
with isopropyl alcohol.
Every 12 months
Maintenance of the input
circuit breaker
(1)(3)
Indicators ON/OFF;
Operations counter;
Abnormal smell and noise.
Every 12 months
Visual inspection of the
power panels
(1)
Electronic boards:
– Check for excessive dust accumulation or any accumulation
of conductive particles or humidity;
– Check for heating spots (discolouration or blackening of com-
ponents);
– Check for leakage or deformation (expansion) of the body of
electrolytic capacitors.
Optical fibers and internal wiring:
– Make sure the optical fibers are correctly inserted and that
they do not bend with radius lower than 4 cm;
– Check for heating spots (deformation, discolouration or black-
ening).
Space heater cord: check the operation. If there is a thermo-
stat, adjust the temperature to turn it off between 5 and 10 °C
above the medium temperature of the electrical room.
Every 12 months
Power and control
connections
Check the tightening of all connections (control and power). Use
the torques recommended by the user’s guide.
Every 2 years Calibrations
Check the status of the offset calibrations. VMP-GND must be
0.0% and within the ±1.0% tolerance.
MVW01 | 13-4
To Next Page
Loading...
