22
R
GS protection for photovoltaic system
S
Photovoltaic inverter
T
Photovoltaic system
U
Power storage system inverter
V
Power storage unit
S1 Bidirectional power storage management meter
(power storage system standard delivery)
S2 Bidirectional energy management meter (optional,
not relevant to billing by the grid operator)
Z1 Balancing bidirectional meter (observe meter cir-
cuit)
Electricity meter for power export and drawing
Z2 Export meter for photovoltaic system power gener-
ation
Z3 Export meter for power generation by
Vitovalor PA2 (standard delivery with
Vitovalor PA2)
Z4 Export meter for Vitovalor PA2 alone
Fuse protection
The Vitovalor PA2 has been factory-tested as a unit
that is ready for connection. Only an adequately sized
power cable needs to be connected on site. This cable
should be routed either to the main low voltage distri-
bution board (mains distribution or meter cupboard) or
to the nearest suitable sub-distribution board. The
Vitovalor PA2 is protected by a circuit breaker (MCB).
Depending on the nature of the domestic grid (TT sys-
tem), or as required by DIN VDE 0100-410, a residual
current device (RCD) may also be required.
We recommend installing an AC/DC-sensitive RCD
(RCD class B) for DC (fault) currents that can occur
with energy efficient equipment.
The Vitovalor PA2 must not be installed in the same
final consumer circuit as other consumers.
!
Please note
Switching off by means of an emergency stop
switch for the heating system can damage the
appliance.
Remove any emergency stop switches from the
existing heating system.
RCD
RCD
kWh
Z1
P
400 V / 230 V~
R
E
F
RCD
A
B
C
D
kWh
Z2
1~
G
M
~
O
N
kWh
S1
H
K
L
Fig. 10
Example: Selective sizing of the protective
devices
A
RCD (on site) e.g. 40 A/0.5 A, 4-pole
B
On-site consumers
C
Fuse/MCB to the sub-distribution board, e.g.
3 x 35 A
D
Selective mains circuit breaker 3 x 63 A
E
On-site consumers
F
RCD Vitovalor PA2 25 A/30 mA, single pole (if
required)
G
Vitovalor PA2
H
Control unit ON/OFF switch
K
Control unit
L
Internal circulation pump
M
GS protection
N
Inverter (DC/AC converter) S
EMAX
= 0.75 kVA
O
Fuel cell stack
P
Property boundary
R
Low voltage grid
S1 Bidirectional energy management meter (not rele-
vant for billing by the grid operator)
Z1 Balancing bidirectional meter (observe meter cir-
cuit)
Z2 Export meter (standard delivery on Vitovalor PA2)
Preparing for installation
Notes on connecting to the mains supply
(cont.)
5839343
Installation
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