Ac Grid Types And Connections; Required Protective Devices; Ac Wiring Preparation - Delta M50A 261 Operation And Installation Manual

3.4.1 AC Grid Types and Connections

The default AC Grid connection is 3Ø-4W. It can also connect 3Ø-3W without
Neutral (N). The inverter will operate from the following grid connections
without need of an external transformer:
TNC system
230/400V
TNS system
230/400V

3.4.2 Required Protective Devices

It is recommended to install an upstream AC line disconnection and over current
protection device. Please refer to your local rules for the required product.

3.4.3 AC Wiring Preparation

• The cross-sectional area for each AC conductor is shown below.
• The information and notice of cable using is shown on next page.
Conductor cross-section:
M70A_260 -
Cu: 35 mm 2 (1 AWG) ~ 120 mm
Al: 60 mm 2 (2/0 AWG) ~ 120 mm
M50A_260/261/240 -
Cu: 25 mm 2 (2 AWG) ~ 60 mm
Al: 35 mm 2 (1 AWG) ~ 60 mm
Stripping length: 20mm
ATTENTION
TNC-S system
230/400V
L1
L2
L3
PE/N
inverter
TT system
230/400V
L1
L2
L3
N
PE
inverter
2 (250 kcmil)
2 (250 kcmil)
2 (2/0 AWG)
2 (2/0 AWG)
Figure 3-13: Size of AC conductors
L1
L2
L3
N
PE
inverter
L1
L2
L3
N
inverter
N
L3
L2
L1
PE
29
Installation
IT system
230/400V
L1
L2
L3
inverter
outer
jacket