aleo
aleo solar Deutschland GmbH
| Osterstraße 15| 26122 Oldenburg |
Germany
Page 54/60
installation instructions Edition 01/2012 en-GB-Intl (120508b)
Effects of the recommended wiring
Fig. 44 Effect of the recommended wiring (diagram)
a
: lightning rod;
b
: lightning conductor,
c
: magnetic field lines,
d
: cable loops with counterclockwise current direction,
e
: cable loops with clockwise current direction,
i(t)
: current
through lightning conductor.
In total, the cables cover only a relatively small area
(
d
and
e
, minor coupling effect).
The interlacing of the wiring in parallel laying
creates areas with reverse current direction.
The current direction of the cable loops
d
runs
counterclockwise, however, that of loops
e
runs
clockwise. This means that in the event of a light-
ning strike, the coupling effect of loops
e
reduces
those of loops
d
.
Return circuit paths to be avoided
Fig. 45 Return circuit paths to be avoided (diagram)
Continuous line
: series connection of the modules with the
positive pole of the module string,
dotted line
: return circuit at the negative pole of the module
string.
The path of the return circuit (negative pole of the
module string) runs far from the outgoing circuit.
With the longer parallel lead, the outgoing and
return circuits are not interlaced with one another.
Effects of the wiring to be avoided
Fig. 46 Effect of the laying to be avoided (diagram)
a
: lightning rod;
b
: lightning conductor,
c
: magnetic field lines,
d
: cable loops with counterclockwise current direction (one
coil),
e
: cable loops with counterclockwise current direction
(two coils),
i(t)
: current through lightning conductor.
The cables span a large area (
d
and
e
) in which the
magnetic field of the lightning conductor current
can induce a voltage
The current direction of the large cable loop
d
and
that of the four small loops
e
is the same. This
means that the coupling effect of the loops
e
strengthens that of loop
d
.
GID AS046f
d
e
+ –
i(t)
a
b
c
GID AS053a
+ –
GID AS045d
+ –
i(t)
a
b
c
d
e
