Supply networks
The economy variable frequency drive AF1000 is suitable for operation on grounded single-phase or three-phase networks with the following voltage systems:
- Single-phase: 1 x 110 V AC-15%...240 V AC+10%
- Three-phase: 3 x 208 V AC-15%...480 V AC+8%
The economy variable frequency drive AF1000 can be operated on the following supply networks without any additional measures:
- TN network
- TT network
For all other network forms, operation is only possible with an upstream isolating transformer. An isolating transformer is a mains transformer that transmits the mains voltage to the secondary winding via a protective isolation. A star point grounded network is made available with the help of this protective isolation.
Network types
The supply networks differ in the type of ground connection. For a better understanding, the table below contains examples with the associated meaning:
Network configuration | French term | Meaning |
|---|---|---|
TN | Terre Neutre | Neutral grounding of a point |
TT | Terre Terre | Direct grounding of a point |
TN-C | Terre Neutre Combiné | Combined neutral grounding: Neutral conductor and protective conductor combined to form PEN conductor |
TN-S | Terre Neutre Combiné Séparé | Separate neutral grounding: Separate neutral conductor and protective conductor |
IT | Isolé Terre | Isolation of all active parts from ground |