Connecting the Utility Grid
Qualified person
AC cable requirements:
Outer diameter: 18 mm to 25 mm
Conductor cross-section: 6 mm² (flexible/rigid) or 10 mm² (flexible/rigid)
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 conductor cross-section derive from these directives. Influencing factors for cable dimensioning are, for example, the nominal AC current, the type of cable, the routing method, cable bundling, ambient temperature, and maximum desired line losses.
Residual-current monitoring unit:
The charging station has an external residual-current device type A, which has a rated residual current of 30 mA. A DC residual-current device of 6 mA is also already integrated into the charging station. Each charging station in the system must be connected to the utility grid via a separate residual-current device and miniature circuit breaker ( > Setting the phases and phase position).
Procedure for maximal charge power of 22 kW:
- Turn off the miniature circuit breaker.
- Dismantle the AC cable by 20 cm.
- Strip 10 mm to 12 mm of the insulation from the insulated conductors.
- Thread the AC cable through the cable gland into the product. To do so, slightly loosen the union nut (M32).
- Connect conductors N, L1, L2 and L3 to the right residual-current device according to the labeling (PZ2, tightening torque: 2.5 to 3 Nm).
- Connect grounding conductor to the terminal block in accordance with the labeling.
- Ensure that all conductors are correctly connected.
- Tighten the union nut on the cable gland hand-tight.
Procedure for maximal charge power of 2 x 22 kW:
- Turn off the miniature circuit breaker.
- Dismantle the AC cable by 20 cm.
- Strip 10 mm to 12 mm of the insulation from the insulated conductors.
- Loosen the busbars from the two residual-current devices (PZ2) and remove them.
- For energy self-sufficiency, connect the supplied busbars to the right residual-current device.
- Guide the two AC cables through the cable glands into the product. Also loosen the two union nuts (M 32).
- Connect conductors N, L1, L2 and L3 to each residual-current device according to the labeling (PZ2, tightening torque: 2.5 to 3 Nm).
- Connect the respective grounding conductor to the terminal block in accordance with the labeling.
- Ensure that all conductors are correctly connected.
- Hand-tighten the two union nuts of the cable glands.
