10
INSTALLATION, CONNECTION AND ENERGIZATION
DANGER!
It is mandatory to connect the inverter to a protection ground (PE). The grounding connection must follow the local
regulations. Use at least conductors with the wire gauge indicated in the Table 10.7 on page 10-14 . Connect the
inverter to a specific grounding rod or to the general ground system (resistance ≤ 10 Ohms), the transformer frame
ground for instance.
Never connect the input transformer secondary windings to the ground.
DANGER!
Il est obligatoire de connecter l’onduleur à un connecteur de mise à la terre (PE). La connexion de mise à la terre doit
suivre les règlementations locales. Utilisez au moins des conducteurs avec le calibre de fil indiqué dans le Table 10.7 on
page 10-14 . Connectez l’onduleur à une tige de mise à la terre spécifique ou au système de mise à la terre général
(résistance ≤ 10 ohms), la terre du cadre du transformateur par exemple.
Ne connectez jamais les enroulements secondaires du transformateur d’entrée à la terre.
10.2.2 Input Circuit Breaker
The MVW01 operates the input circuit breaker. This circuit breaker must have minimum voltage, closing and opening coils. The power supply
for the circuit breaker circuits comes from the MVW01. The following signals, provided by the circuit breaker, are necessary for its operation:
READY ( Ready), ON (On), OFF (Off) e TRIP (Trip). These signals must be dry contacts (potential free).
The MVW01 also has inputs for the indications of input transformer alarm and fault.
M
M
Switchgear
Input switchgear panel
Inverter
X10: 1 2 5 3 4
24 Vdc
DI2 - Ready
DI5 - Trip
DI3 - On
DI4 - Off
X12: 1 2 3
220 Vdc
Command power
supply
Inverter ready
4
Emergency
Link 50%
5 76 8
Turn on
Turn off
MIN
Undervoltage
release
BF BA
On Off
220 Vac
CommandsFeedback
On Off
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Ready
Protection
BM
BA
BF
K
Rectifier
+
Inverter
Power supply
SO
220 Vac
Figure 10.11: Connections between the input circuit breaker and the inverter
WARNING!
The input circuit breaker must only be closed by the inverter, otherwise the transformer and the inverter may be damaged.
MVW01 | 10-16
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