Connecting the Utility Grid

Qualified person

AC cable requirements as follows:

  • The maximum permitted temperature of the terminal block for AC connection of 105°C must be observed.

  • External diameter: 11 mm to 21 mm

  • Conductor cross-section: 6 mm² (flexible/inflexible) or 10 mm² (inflexible)

  • Insulation stripping length: 12 mm

  • Sheath stripping length: 20 cm

  • The cable must be dimensioned in accordance with the local and national directives for the dimensioning of cables. The requirements for the minimum wire size derive from these directives. Factors influencing cable dimensioning include nominal AC current, cable type, routing method, cable bundling, ambient temperature and maximum desired line losses.

Residual-current monitoring unit:

For operation, the charging station requires an external residual-current device type A, which has a rated residual current of 30 mA. Each charging station in the system must be connected to the utility grid via a separate residual-current device and miniature circuit breaker. A DC residual-current device of 6 mA is already integrated in the charging station.

Multi-EVC operation mode:

In multi-EVC operation mode, all charging stations must be connected to the utility grid on a rolling basis ( > Circuitry Overview).

A system with 3 three-phase charging stations must be connected to the utility grid on a rolling basis as follows:

  • Three-phase charging station 1: L1, L2, L3

  • Three-phase charging station 2: L2, L3, L1

  • Three-phase charging station 3: L3, L1, L2

For example, a system with 2 three-phase charging stations and 1 single-phase charging station can be connected as follows:

  • Three-phase charging station 1: L1, L2, L3

  • Three-phase charging station 2: L2, L3, L1

  • Single-phase charging station 3: L3

Procedure:

  1. Turn off the miniature circuit breaker.
  2. Dismantle the AC cable by 20 cm.
  3. Strip 10 mm to 12 mm of the insulation from the insulated conductors.
  4. Thread the AC cable through the cable gland into the product. If necessary, slightly loosen the swivel nut.
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  5. Connect the grounding conductor according to the labeling.
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  6. Connect N according to the labeling.
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  7. For EVC22-3AC-10, connect the conductors L1, L2 and L3 according to the labeling. Ensure the correct sequence of the line conductors.
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  8. For EVC7.4-1AC-10, connect the conductor L1 according to the labeling.
  9. Ensure that the terminal points are allocated to the correct conductors.
  10. Tighten the swivel nut on the cable gland hand-tight.
    AC Connection
    Connecting Additional Grounding