3 Installation
21
3-phase grid connection (3-phase AC connection)
Inverter 1
Inverter 2
Inverter 3
PE
N
L3
L2
L1
1
2
4
3
1
2
4
3
1
2
4
3
1-phase grid connection (AC connection)
Inverter 1
Inverter 2
Inverter 3
PE
N
L1
1
2
4
3
1
2
4
3
1
2
4
3
A corresponding circuit breaker is recommended as
a line protection element in the grid feed direction:
NT 2500: 16 A
NT 3700: 25 A
NT 4200: 32 A
NT 5000: 32 A
with slow-blow characteristic B
· Depending on the grid operator and the feed
point, a three-phase meter or a single-phase
meter must be used.
· Some grid operators require the use of a reverse-
current-capable meter.
AC bayonet connector
The AC bayonet connector is permissible for cable
sheath diameters from 13 mm to 20 mm.
The following sequence must be observed during
assembly:
1. Strip the voltage-free line and the cable ends.
10
52,5 (PE 55)
For lines with a cable sheath diameter from 16 to 20
mm, the cable gland must be adapted accordingly.
To do this, cut out the inner section of the blue seal-
ing ring.
2. Slid the cable gland and the plug housing onto
the line.
3. Connect the cable ends to the plug terminals in
accordance with the pin assignment.
Tightening torque: 0.7 Nm.
CAUTION
Incorrect pin assignment may result in destruction of
the unit!