50 Electrical design and installation
Manual Energy Storage Inverter ESI-S
6.10 Connection to make to enable the islanding feature and black
start
To work properly in islanding mode, a UPS for auxiliaries is required. The minimum rating
for the UPS: 600VA.
A NC switch has to be provided (not ABB scope of supply) in order to disconnect the
island from the grid in order to avoid any resynchronization issue (
). This
contactor is driven by the ESI-S and has to be rated according to the loads. The command
of the islanding switch has to be connected on the ESI-S on the connectors: X4-1 and X4-
2. The output voltage of the command coming from the ESI-S is 230V
ac
.
Also a voltage measurement has to be provided in order to ensure a proper
resynchronization when the ESS is leaving the islanding mode. The voltage measurement
as to be rightly protected by fuses (current rating: 2A). The measurement has to be
connected to X4-3 and X4-4 in the inverter. The voltage measured is the voltage between
the upstream point of the islanding contactor on phase 1 and the downstream point of
the islanding contactor on phase 1 see
Regarding the black start feature (optional), the external box (to be installed by the
customer) has to be supplied by the UPS. The DC bus of the inverter has to be connected
on the X3-1 and X3-2 connectors. The command of the black start functionality requires
also to be controlled by the inverter. The connectors X2-1, X2-2, X2-3, X2-4 are required
to make the system working properly in black start.
Island
Network
supply
1
2
3
3
X4-5
X4-6
X4-1 X4-2
ESI-S
UPS
Single
phase
X1-1
X1-2
Black Start
box
X7-1 X7-2 X6-1 X6-2
X2-1
X2-3 X2-4
X2-2
X7-3
X7-4
X3-1
X01-1 X01-2
X3-2
Figure 36: Islanding and black start interface setup
Item Description
1
Islanding contactor (NC) (not supplied by ABB)
2
Resynchronization voltage measurement
3
Protection fuses for the voltage measurement
