Ac Auxiliary Power-Wiring; System Grounding - Alpha ESS STORION-T50 Installation Manual

INSTALLATION
Table 19 PCS wiring copper bars description
Position Designation
1 PV +
2 PV -
3 Battery +
4 Battery -
5 A (Load)
6 B (Load)
7 C (Load)
8
A (Grid)
9 B (Grid)
10 C (Grid)
11 N
12 Grounding
Figure 4-18
DC wiring copper bar dimension
32
Description
PV positive port, dimension is shown
as below.
PV negative port
Battery positive port
Battery negative port
Phase A, dimension is shown as below
Phase B
Phase C
Phase A
Phase B
Phase C
Phase N
Figure 4-19
AC wiring copper bar dimension
33

4.4.3. AC Auxiliary Power-Wiring

Please connect the AC auxiliary power cable to each HV900105 with the Grid/GEN L
phase (anyone of L1, L2 and L3 phase) and N pole of PCS as the following Figure 4-20
shows.
PCS
PV BAT Load DG/Grid
PV+ PV - BATin+ BATin - L1 L2 L3 L1 L2 L3
N
Figure 4-20 AC Auxiliary Power Cable Connection
NOCE:
The auxiliary power cable bond must be placed above the AC power cable bond. After
this please tighten the screw.

4.4.4. System grounding

The grounding of power modules/PCS connection with the rack should go through
hangers on the module.
As for rack grounding, the rack bottom is installed with grounded cooper bars. The cable
diameter can be refereed to the following table.
WARNING
Notice that the AC output neutral is not connected to ground.
Table 20 Grounding PE cable description
Rated power Copper PE cable section recommendation (mm²)
50kW
100kW
WARNING
Rack and modules need to be grounded reliably! The grounding resistance should be less than
4ῼ.
INSTALLATION
≥16
≥25