7.4
Connecting the device to the mains supply
7.4.1
Preparing the grid connection
↻
A connection cable with 4 cores (4 individual cores or multi-core) up to max. ca-
ble cross-section 0,63 In - is available on the device.
↻
Time required for AC connection: 30 min
↻
Nominal grid voltage matches the VAC nom name plate details.
1. For improved accessibility: Unfasten the AC input plate using the 6 screws [
T_30]
2. Unfasten the cable fitting for AC connection and PE earth (ground) [ W_46].
3. Remove sealing plug.
4. Guide the AC leads through the cable fittings.
5. Strip the insulation from the AC cables.
6. Strip the insulation from individual wires for L1 / L2 / L3 (ABC) and PE (ground)
so that the strand and insulation can be pressed into the cable lug shaft.
.
CAUTION! Risk of fire due to chemical corrosion. Cable lugs must be
suitable for the conductor material and copper busbars being used.
3
7. Press on cable lug.
8. Affix shrink tubing (not included as standard) over the shaft of the ring cable lug
of the AC cable.
9. Fasten the input plate using the 6 screws [ T_30 / 53.10 In-Ibs ]
3
2
1
4
Fig. 19:
Removing the AC input
plate
1 Housing base – AC-side
2 Screws for mounting
3 Input plate
4 Cable fitting
7.4.2
Making the grid connection
4-pole connection, TN, TT system
↻
Grid connection is prepared.
1. Loosen nut and lock washer at the marked grounding point.
2. Lay the grounding cable onto the grounding point. Secure it with the nut and
lock washer provided [ W_17 / 88.50 In-Ibs ].
4
3. Place the cable lug of cores L1 / L2 / L3 on the busbar in accordance with the la-
beling and secure it with a nut, screw and lock washer (fastening elements in
scope of supply) [ W_17
/
265.52 In-Ibs ].
4. Check secure fit of all connected cables.
5. Tighten AC cable fittings [ W_46 / 88.50 In-Ibs ].
ð
The device is connected to the power grid.
3
2
1
4
Ground
Fig. 20:
4-Pole AC grid connection
1 L1 busbar
2 L2 busbar
3 L3 busbar
4 Ground - earthing point
NOTE
Observe the general earthing recommendation of the existing mains system.
3
When using aluminum cable lugs we recommend using cable lugs with galvanic tin plating or, alternatively, AL/
CU cable lugs with suitable AL/CU washers.
Otherwise, with the electrolytes present (e.g. Condensation water), the aluminum could be destroyed by the
copper bus bars.
4
If the connection is made in a TN-C grid, connect the PEN grounding cable to the ground earthing point.
Manual
Installation | 7
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