● During the power-on procedure, power o the batteries immediately if any
fault is detected. Rectify the fault before proceeding with the procedure.
● After batteries are used for system commissioning or batteries have discharged,
charge the batteries in time. Otherwise, batteries may be damaged due to
overdischarge.
● Battery overdischarge and damage may occur if batteries with low SOC are
stored. Batteries should be recharged in a timely manner.
Table 9-1 Power-on procedure
Step Item Remarks
1 Powering on the AC power distribution
cabinet connected to the grid
As shown by (1) in Figure
9-2
2 Poweri
ng on
the
auxiliar
y
power
supply
(Optional) Powering on the
UPS
As shown by (10) and (11)
in Figure 9-2
Powering on the 220 V AC
auxiliary power supply
As shown by (2), (3), and (4)
in Figure 9-2
3 Powering on the SACU As shown by (5) in Figure
9-2
4 Poweri
ng on
the ESS
Powering on the DC circuit
breakers of battery racks
As shown by (6) in Figure
9-2
5 Powering on the auxiliary
power supply (turning on the
AC switches and then the DC
switches)
a
As shown by (7) in Figure
9-2
6 Powering on the output DC
circuit breakers
As shown by (8) in Figure
9-2
7 Poweri
ng on
the AC
side of
the
Smart
PCS
Powering on the battery side
of the AC power distribution
cabinet
As shown by (9) in Figure
9-2
Note a: Before turning on the internal switches of the ESS auxiliary power
supply, check that the AC auxiliary power supply voltage is within the normal
range (220 V±10%).
LUNA2000-200KWH-2H1 Smart String ESS
User Manual 9 System Power-On
Issue 03 (2023-03-30) Copyright © Huawei Digital Power Technologies Co., Ltd. 122
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