Supply networks

The AMP8000 distributed servo drive system is suitable for operation on three-phase networks. The respective network configurations differ by 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

 

Connection to TN or TT networks is possible without further measures.

For all other networks, operation is only possible on isolating transformers. An isolating transformer is a mains transformer that transfers the mains voltage to the secondary winding via an electrical isolation. A star point grounded network is made available with the help of this protective isolation.

 

The AMP8620 power supply modules are equipped with a wide-range voltage input and can be connected to the following voltage systems:

Supply networks 1:

Installation with protective conductor connection

When installing electrical systems and components, the protective conductors must be connected first. They must be disconnected last when uninstalling.

Depending on the magnitude of the leakage currents, observe the following regulations for the implementation of the protective conductor connection:

    • Minimum requirement for protective conductor: KU value of 4.5
    • The minimum requirement for leakage currents: IL < 10 mA; KU = 6 for IL > 10 mA

    Value

    Explanation

    KU

    Variable for the classification of safety-related types of failure for protection against dangerous shock current and excessive heating

    KU = 4.5

    Achieved in relation to interruption:
    With permanently connected protective conductor connection
    ≥ 1.5 mm2
    With protective conductor connections ≥ 2.5 mm2 via connector for industrial plants according to IEC 60309-2

    KU = 6

    Achieved in relation to interruption:
    With permanently connected conductors ≥ 10 mm2; the type of connection and routing must comply with the standards applicable to PE conductors

    Further Information
    See also