10
vacon • 114
Solar pump application
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
10.
S
OLAR
PUMP
APPLICATION
The installation instructions in this chapter are intended only for VACON
®
20 X Drives with addition-
al solar pump application.
10.1
Danger
10.2
DC Fuse selection
The fuses on the DC-Input of the inverter must have the following characteristics:
It is recommended to use gPV fuses, which are developed for solar application, in order to protect
cables and panels against reverse overcurrent, when multiple strings are connected in parallel.
See chapter 10.3. for recommended gPV fuse manufacturer.
The photovoltaic fuses have to meet the IEC 60269-6 or the UL 2579 standard.
See table below for recommended fuse sizes:
The terminals are live
when the VACON
®
20 X Drive is connected to a photovoltaic system.
Photovoltaic cells generate DC voltage even at low intensity of sunlight.
Wait 60 seconds
until the drive is discharged,
before switching between AC and DC supply
(photovoltaic system) and vice versa.
Table 51. Fuse characteristics
Fuse type
Min. Voltage rating
DC current
1000 V
Table 52. Recommended fuse sizes, Mains voltage 3AC 208-240V, 50/60 Hz, up to 400V in
VDC
Enclosure
size
AC drive type
Rated continuous
current [A]
IEC60269-6 Fuse
size [A]
UL-2579 Fuse size
[A]
MU3
0011
11.0
20
20
0012
12.5
25
25
0017
17.5
30
32
Table 53. Recommended fuse sizes, Mains voltage 1AC 208-240V, 50/60 Hz, up to 400V in
VDC
Enclosure
size
AC drive type
Rated continuous
current [A]
IEC60269-6 Fuse
size [A]
UL-2579 Fuse size
[A]
MU2
0004
3.7
6
8
0005
4.8
8
10
0007
7
12
15
