Danfoss DLX 2.0 UL, DLX 2.9 UL, DLX 3.8 UL, DLX 4.4 UL User Manual

MAKING MODERN LIVING POSSIBLE
DLX
User Guide
DLX 2.0 UL - DLX 2.9 UL - DLX 3.8 UL - DLX 4.4 UL
SOLAR INVERTERS
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U
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series L00410625-
1
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User Guide.
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User G
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L00410625-01
I
II
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IV
Usser Guide DLX UL series L00410625-
1
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1.
2.
3.
4.
5.
ONT
Introducti
Product O
St
2.1. G
2.2. W
2.3. U
2.4.
Safety Pr
G
3.1. Si
3.2. R
3.3.
Installati
M
4.1. C
4.2. El
4.3.
Start Up...
Ini
5.1.
NTS
on .............
verview ....
ndards and
neral Inform
rning Symb
packing an
cautions ...
neral Prepar
e Preparatio
quired Safet
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chanical Ins
ecks Prior to
ctrical Instal
..................
tial Start .......
.................
.................
Approvals ....
ation .............
ls ...................
Inspection .
.................
ations ............
s ....................
Equipment
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allation ........
Electrical In
lation .............
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... 7 ... 7 ... 8 . 10
14
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21
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44
. 44
6.
7.
8.
9.
10.
Operatio
C
6.2. In
6.3.
Troubles
C
7.1.
7.2.
Maintena
S
8.1. R
8.2. R
8.3. R
8.4.
Warranty .
W
9.1. W
9.2.
Tech
In
10.1.
Fi
10.2.
.................
nnection be
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eck List by F
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gular Syste place Devic turn and Dis
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e Trip Levels
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54
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76
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90
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91
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User G
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L00410625-01
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series L00410625-
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User G
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L00410625-01
9
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work.
series L00410625-
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.
ck the invert
e the box in
packaging.
the seal, an
ove the up
envelope wi
h sides of th
er grip on t
box using t
ove the lo
the inverter
bag with ac
e all the ori
e.
unpacking t
cking
er as follows
position, wi
open the b er part of th
th the extra
inverter ca
e inverter. L e “handles” er section of mounting b
essories is a
inal packing
e inverter, c
h the top cl
x.
foam packi
roduct labe e are narro ft the invert
s illustrated
the foam pa
acket.
ttached to t material for
heck that all
arly visible a
ng material l.
ed in order t
r carefully o
in Figure 2.3
ckaging and
e bracket.
possible lat
component
nd accordin
nd take out
o get a
ut of
take
r
Fig
are include
to the arro
the Installat
re 2.3: “Handles
and unda
markings
on Guide an
aged.
n
2.4.4
DL
Mo
Ins
Ac
2.4.5
he
NE
Pro wa
Be
Scop
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UL single p
nting brack allation Gui essories: gro
NOTI
Condui and m
Inver
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ousing of th
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e
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s, fittings a
st be provid
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DLX UL inv
oor or outd
of protecti
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y the exter
ery
, bracket scr
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sure
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or use.
n from falli
nd corrosion
al formatio
ws, extra pr
raps are not
tem installe
designed t
g dirt, rain, s .
of ice on th
duct label
part of the s
.
:
leet, snow,
housing.
andard sco
indblown d
e of supply,
st, splashin
User G
ide DLX UL series
L00410625-01
1
1
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2.4.
he f
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anical Di
2.4: Mechanic
Covers
f the invert
mension
l dimensions
r consists of
H: 28. W:13. D: 6.2 i
an upper an
1. U
2. Di
3. Lo
4. H
inches / 720 inches / 353 nches / 158
a lower co
per cover
play
er cover wit itch le covers (Kn
m m
m
er.
DC disconn
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ct
Figure 2.
The
pper cover
cove
by unautho
The l
instal
2.4.6
calle easy
12
wer cover
ler for electri
.
he l
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the Stringb
o de-energi
Rem
: Inverter struct
may be rem
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cal connecti
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x. The lowe
e the DC ter
re
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voids the
ustomer co n and main
Lower
nnection a r cover is eq minals on th
oss authoriz
arranty!
nection are
enance.
over
ea in the inv
ipped with
inverter.
d persons o
, and may b
rter and als
DC switch
nly. Remova
e removed
the inbuilt
n the front,
U
ser Guide DLX UL
l of the upp
y the syste
ombiner b
hich make
series L00410625-
r
x
t
01
u
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3. An
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Always DC OF to the i
ove the fo
gle the cove
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erter is char
performed
circuit bre
ER
disconnect t
, but before
verter whe
r screws on outwards, a
ed with hig
y qualified
ker and the
he PV array removing th
exposed to
he front wit
nd take it of
voltages, a
ersons.
C - switch.
ables from t
covers, as t
sunlight.
a 4 mm he
carefully.
d removal o
e inverter a
he PV array
key.
f the lower c
ter turning
an supply u
ver may
he AC and
to 600 VDC
4. St
5. Fa
User G
re the lower ten the scre
CAU
Never r lower c electro
ide DLX UL series
cover and s
s on the lo
ION
move the i
ver during
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L00410625-01
igure 2.6: Remo
rews safely
er cover wi
verter lowe ain or in da nts.
ving the lower c
o avoid loss
h a torque o
cover in we
p condition
ver
r damage.
0.74 ft-lbf /
conditions!
s can damag
1.0 Nm.
Removal of e sensitive i
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ternal
1
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3.1.
his serie instal
lation. Failur
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The
main
tenance mu
feder
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the i
AFE
hapter cont safely. Thes
arranty.
enera
LX UL inver
structions i
Y PR
ins instructi
safety prec
to follow t
l Prepa
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st be perfor
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this User Gu
CAU
ns on how utions mus
e safety pre
ations
ain no user-
med by qua
NSI/NFPA 7
de.
ION
o install, op
be read tho
autions ma
serviceable
lified perso
NEC and OS
rate and ma
roughly and
result in inj
arts, and in
s, who hav
HA, and foll
intain the D
understood
ry or death
tallation an
knowledge w such regu
X UL inverte prior to
nd may voi
d
of state and
ations, and
3.1.1
Cont conn
Rea
co
NOTI
he saf
to be a
Conn
.
ct the local
cting to the
WAR
o ens to pers be perf
DAN
Never breake dischar
d the instru
inverter mu nected to th
E
ty precauti le to install
ections
tility comp
grid.
ING
re safe and
ns or dama
rmed by q
ER
ork with en
(s) and the
ed and saf
tions and ca
t be connec
is circuit.
ns and instr
nd operate
ny for interc
orrect electr
e to the eq
alified pers
rgized port
C switch mu
to work on.
tions on th
ted to a ded
ctions in thi he inverter
nnection a
ical connecti
ipment the
ns.
! Prior to the
st be turned
PV module
cated AC cir
s User Guide
orrectly.
reements a
on of the in
lectrical wir
electrical co
OFF to ensu
prior to the
uit. No othe
must be rea
d power ap
erter and pr ng and con
nnection, th
re that the t
electrical co
r devices are
thoroughly
roval befor
vent injury
ection must
AC circuit
rminals are
nection.
to be
14
U
ser Guide DLX UL
series L00410625-
01
u
T
n
The• To a
h
eope
o
i
t
a
C
X
e
s
T
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3.1.2
he i
tec
Oper
.
verter must
NOTI
The DL design electric
inverter mu
void damag
nical specifi
CAU
Keep t PV mo the PV the PV
tion
only be ope
E
UL series is
d purpose,
ity to feed in
t be operat e to the inve cations.
ION
e voltage an ules is inver
oltage incr
oltage decr
ated in acco
grid intera
hich is to c
o the grid.
d without a
rter, it must
d current wi
ely proporti
ases from th
ases from t
rdance with
tive inverter
nvert PV-ge
y unauthori
e used with
hin the spe
nal to the t product la
e product la
the instructi
and must b
erated DC
ed modific
in the opera
ified limits!
mperature;
el rating an
bel rating.
ns in this U
used exclus lectricity int
tions. ional limits
he voltage
t lower tem at higher t
er Guide.
ively for its
AC
iven in the
enerated by
peratures
mperatures
Mis int
Ign ma
3.1.3
Prior and t
NOTI
he op maxim of the s temper
use of the in
rfere with t rating and
ring the ins
ntenance m
Main
.
o service an
he DC sides
NOTI
Accessi must o compo
E
n circuit vol m PV syste
eries-conne
ature.
erter may d
e operation
aintaining t
ructions an
y void the i
enance
d maintena
nd be fully
E
ng the inver
ly be opene
ents.
age, VOC, m
voltage is
ted PV mod
mage the d
f the invert e inverter.
guidelines i
verter warr
ce, the inver
ischarged.
er upper se
d by authori
st never exc
qual to the
les, correct
vice or oth
r, or may ev
n this User G
nty.
er must al
Refer to 8.1.
tion voids th
ed persons
ed 600VDC um of the ra d for the lo
r electrical e
n cause inj
ide and not
ays be disc
witch-OFF.
e warranty.
ue to dang
nder any co
ed open-cir
est expecte
quipment a
ry or death
performing
nnected o
he inverter
r of damag
ditions. The uit voltage, ambient
d can
o persons
egular
both the A
pper cover
to internal
User G
ide DLX UL series
L00410625-01
1
5
The
t
t
g
f
a
S
3.2.
c
s
s
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inverter lo
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allation and
unauthorize
No dis
ributor in ca
Re
ular mainte
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A s
Obse
rve the follo able site. Thi
a suit
r to 8.2. Reg
fety compo
ite Pr
er cover mu
maintenanc
modificati
e of failure.
ance must
ular System I
ent must al
parati
ing precaut
is crucial to
t only be ta
or repairs.
ns may be
e performe
spections).
ays be repl
ns
ions when maintain th
en off by qu
ade to the i
to maximiz
ced by the s
ounting an
efficiency
lified perso
verter. Cont
the life exp
ame type an
installing th f the inverte
s during th
act the syste
ctancy of th
d rating.
e DLX UL inv
r!
electrical
m installer o
e inverter
rter series
n
3.2.1
Suffi up in
Ob
Mou
.
ient ventilat
ide the inve
CAU
Insuffic space a coolin
erve the mi
ting Lo
on and low
rter, which c
ION
ent cooling round the in and efficien
imum dista
ation
mbient tem
n result in p
ay lead to
erter and u
operation.
ces specifie
perature are
ower losses.
egradation
blocked ve
below to
1. 1
2. 1
3. 5.
4. 5.
needed to p
of performa
tilation ope
aintain opti
.75 inches / 4
.81 inches / 3 91 inches / 15 91 inches / 15
revent temp
ce! Ensure s
ings for opt
al cooling:
00 mm 00 mm 0 mm 0 mm
rature buil
fficient air
imum
-
igure 3.1: Mini
16
um distances f
r optimum cool
ng
U
ser Guide DLX UL
series L00410625-
01
u
The
ecom
e
d
T
n
s
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m
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n
N
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Ke
It is the
Th rea
3.2.2
he i
and t
Ens du
Ens
Th te int
No
WAR
The m temper
inverter mu p the lower
ponents. not recom inverter.
display sho
ily accessib
Envir
.
stallation o
he OSHA reg
WAR
Protect the inv period
ure a longer
ty, dry and c
ure a non-fla
ambient te
perature ris
rnal compo
-condensin
ING
unting surfa
ature (194°F
t be mount
over closed
ended to in
ld be at eye
e.
nment
the inverter
lations.
ING
the inverter
rter heat sin
of high perf
life and opti
ol environ
mmable an
perature sh s above 104 ents. relative hu
e must be s 90°C) of the
d in a vertic
when moun
tall the inve
level, the pr
must compl
from flamm
k can reach
rmance op
um perfor
ent
non-explosi ould be bet °F/+40°C th
idity must
itable for th
inverter.
l position.
ing the inve
ters in living
duct label
with local r
ble and exp
emperature
ration.
ance of the
ve environm
een -13°F a
inverter ma
e between
e weight (4
rter to avoid
areas due t
ust be visib
gulations, t
osive enviro
as high as 1
inverter by i
ent to avoid
d 149 °F/-2 start to red
% and 99
-49 lbs/20-2
damage to i
possible no
e and the c
e National
nments to a
94°F/90°C d
stalling it in
fire. °C and +55
uce power t
.
kg) and
ternal
se levels of
nnection ar
lectrical Cod
oid fire, as
ring long
a clean, non
C. If the
protect
a
-
NOTI
Avoid losses, reduce screen
CAU
User G
he inv come i 194°F/
ide DLX UL series
E
xposing the
s direct sunl power out
uality.
ION
erter should
contact wit
0°C.
L00410625-01
inverter to d
ight causes i
ut. Also, dir
be installed
h the rear in
irect sunligh
ncreased int
ct sunlight
n a location
erter surfac
! Direct sunl
rnal tempe
ay cause d
where peo
, due to tem
ight may ca
ature that c gradation o
le cannot ac peratures u
se yield
n lead to
the LCD
identally
to
1
7
Thesno
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3.3.
p
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t
Inv
Com equi
inverter is s
w and rain,
rter locatio
equir
liance with
ment requir
itable for o ust and san should be i
d Safe
he local and
ments.
tdoor opera
.
close proxi
y Equi
federal elec
ion, but sho
ity to the P
ment
rical regulat
uld be shelt
arrays to
ons is requir
red from dir
inimize DC l
ed to satisfy
ct sunlight,
sses.
the safety
3.3.1
Disc durin from main
Bot co
Eac be
3.3.2
NOTI
Safety compli adequ
Disc
.
nnection de g operation. power surge
enance and
h AC circuit
ductor to fa
disconnect
e an interru
h disconnec
ermanently
Over
.
E
quipment
nce with N
te.
nnectio
ices, switch
They protec
s and syste
repairs.
reaker(s) an
ilitate maint
evices mus
t rating suffi
ion device
marked for
urrent
ust be provi
to ensure t
Devic
es or circuit
the current malfunctio
DC switch
enance wor
conform to
cient for the
ust be readi
heir purpos
rotecti
ed and inst
he required
s
breakers, e
carrying co
s, and help
re recomm
and repairs
the local an
voltage and y accessible
.
n Devic
lled by the
rotection o
able a shut­ductors and o shut dow
nded on ev
of the invert
federal elec current avail and totally e
s
ystem instal
the PV syst
off from the
other syste the inverter
ry current-c
r.
trical regula
able in the c
nclosed. All
ler in
m is
power sourc
componen
safely for
rrying
ions, and
rcuit.
evices mus
s
Over
urrent prot
prev
nt overheati
An
vercurrent
If a
use blows o
rep
lacing or res
18
ction device
ng as a resul
rotection d
r a circuit br
tting it.
, fuses or ci
of overload
vice is requi
aker trips, t
rcuit break
, short circui
red on each
e cause sho
rs, protect t
or ground f
ngrounded
ld always b
e circuit co ult.
conductor.
determine
U
ser Guide DLX UL
ductors and
before
series L00410625-
01
u
2
The
n
u
h
The
2
a
e
Theman
t
3
v
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The
d
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3.3.
or i eq
If t
7.2.
3.3.
DC loc ind
DC sys
Table
In
.1. Gro
GFDI prote
the PV con ipped with e ground fa
Table of Eve
rating of th
.2. DC F
uses protec ted in the S
pendently.
rating of th
ufacturer,
uses are no
em installer.
.1: DC current c
erter Type
DLX 2.0 UL DLX 2.9 UL DLX 3.8 UL DLX 4.4 UL
nd Fault
ts the negat
uctors. It is
finger-safe
lt current e
ts).
GFDI is 600
ses
the conduc
ringbox, eq
DC fuses sh L requireme mally not a
aracteristics an
Max
Curr
9.5
13.
18.
21.
Protectio
ve/positive ocated in th use holder. ceeds 1A th
and 1A.
DC
ors from ba
ipped with
ould be as p
ts and NEC,
art of the sc
d recommende
DC
nt
A A A
n (GFDI)
rounded str
lower com
GFDI open
k feed curre
inger-safe fu
r the recom
with a maxi
pe of deliv
fuse ratings
1
PV String
Fuses
15A 22A 29A 33A
ings from gr
artment of
and the inv
nts from par
se holders t
mendations
um of 40 A
ry, and mus
2x PV St
Fuse
8A 11A 15A 17A
und faults i
he Stringbo
rter shuts d
llel strings.
disconnect
of the PV m
be provide
ing 3x
the PV arra
and is
wn (Refer t
hey are
each fuse
dule
by the
V String
Fuses
5A
8A 10A 11A
3.3.
an
AC
User G
NOTI
Overcu which i string c modul
.3. AC O
AC Overcur
the grid.
CD must b
CAU
o red circuit Nation
3.2 bel
ide DLX UL series
E
rent protec
equal to 1.
onductors o
product lab
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provided b
ION
ce the risk o
rovided wit
l Electrical C
w
L00410625-01
ion is not re
5 x ISC,, from
the maxim
el.
t Protect
(OCD) prot
the system
fire, the inv
branch circ
ode, ANSI/N
uired for PV
all sources c
m overcurre
ion
cts the sup
installer.
rter AC ter
uit overcurr
PA 70, and
strings whe
nnot excee
nt device siz
ly conducto
inals must
nt protectio
aving maxi
e the maxi
the ampaci specified o
s between t
nly be conn
in accorda um ratings
um current,
ty of the PV
n the PV
e inverter
cted to a
ce with the
as per Table
1
9
3
n
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e
Table
I
.2: AC current c
verter Type
DLX 2.0 UL DLX 2.9 UL DLX 3.8 UL DLX 4.4 UL
aracteristics an
Max A
208VAC
10.0A
14.0A
18.5A
21.5A
fuse rating
C Current
240V
AC
8.5A
12.0A
16.0A
18.5A
208V
15A 20A 25A 30A
AC Fu
AC
es
40V
15A 15A 20A 25A
Tripping
haracteristic
AC
B or C
Type
s
Double
Pole
3.3.3
Over
DLX
the volta
PV DC
Wh sur to
Ref
IEE
des
Surg
.
oltage prot
L series are
C source cur
e surges to
ystems inst
and AC side
n the cond
e arrester.
btain the re
r to NEC gu
ices.
provides a
igned for ca
Protec
ction is use
quipped wi
rent and the
round.
lled in an o
, as they can
ctors are ex
ne or more
uired level
delines for s
ood base fo
egory B: 100
ion
to prevent h Temperat AC output c
en or expos
act as lightn
osed to tra
urge arreste
f protection
lecting app
selecting k
kA – 150 kA
oltage surg
re protected
rrent, whic
d environm
ing rods.
sients, their
rs are neede
.
opriate kA r
ratings of t
per phase.
s through s
etal Oxide
diverts the
nt need ad
behavior lim
in installati
tings for ov
e surge arr
nsitive equi aristors (TM
xcessive cu
ed protecti
its the effect ons with lon
rvoltage pr
ster: The DL
ment. The V) on both
rent from
n on both t
iveness of a
conductor
tection
UL series ar
e
20
U
ser Guide DLX UL
series L00410625-
01
u
4.
T
c
d
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u
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t
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e
I
NSTA
his
and
quali
hapter desc
etails impor
fied person
LLAT
ibes how to
ant issues r
who follow
ON
install the in
lated to the
the installat
erter correc nstallation. on instructi
ly, both me
he informa
ns as descri
hanically an
tion is inten
ed in this U
d electricall
ded for
er Guide.
,
4.1.
he
dime
DAN
Never the ter
NOTI
The Sa installa
echa
ounting sur
sions and h
WAR
Followi lethal c
ER
ork with en
inals disco
E
ety Precautio
ion proced
ical In
face and the ousing tem
ING
ng the instal
nsequence
rgized port
nected.
s (refer to 3
res must be
tallati
mounting
erature (Ref
ation instru
.
! All work on
Safety Preca
ead carefull
n
ethod must
r to 10. Tech
tions will pr
the inverter
utions) and t
prior to ins
be suitable f
ical Data).
vent poor p
must be per
he following
allation.
r the invert
erformance
formed with
detailed
r’s weight,
r possible
4.1.1
Depe the of fas
Mo (Re ins
flo
User G
Wall
.
nding on th
all bracket.
teners to su
bracket is d inverter mu
nt the inve
er to 3.2.1. alled. recommen
r level.
ide DLX UL series
racket
mounting s
he system i
port the we
signed to s t be mount
ter in compli
ounting Loc
ed height f
L00410625-01
urface, differ
staller is re
ght of the in
pport 176.4
d in a vertic
ance with th
tion). This is
r the conne
ent mountin
ponsible fo
erter on th
lbs. / 80 kg.
l orientatio
e minimum
especially i
tion area is
g methods selecting th
mounting s
! pacing to e portant wit
0 - 55 inche
ay be requi e correct typ urface.
sure optim
several inv
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ed to secur
e and numb
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rters
mm above
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Asse
he
Asse
bling
racket consi
Figure
ble the bra
ts of three
.1: Wall bracke
ket as follo
arts:
components
s:
erter Bracket
A. In B. Sp
acer (Optiona ingbox brack
C. St
l)
t
emble the i
1. As br
cket openin
2. Fa
ten the spa
22
verter brac
.
er by pullin
F
gure 4.2: Assem
et with the s
it over the s
ling the wall br
acer by gui
lit until it is f
cket
ing the spa
stened.
er into the i
U
ser Guide DLX UL
verter
series L00410625-
01
u
abrabra
r
sope
s
e
3
s
The
T
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5. Fa
6. Th
15
Fa
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/
rk the moun
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rect dimens
emble the S
ning.
ten the spa
correct dis ” (+ 45/64”).
2
ten the Stri
holes in th
istances bet
ting holes o
plate to en all with min
on of the scr
ringbox bra
er by pullin ance betwe
gbox brack
Stringbox
een the scr
the mounti
ure that the imum 2 fast ews. The hol
ket and the
it over the s
n the invert
t to the wall
racket have
ws:
g surface u
bracket is co
ners. The in
s in the bra
spacer by g
lit until it is f
r bracket an
with minim
diameter o
CC1: CC2: CC3: CC4:
CC5: D1: D2: 1
ing a spirit l
rrectly level
taller is resp
ket have a
iding the sp
stened.
d the String
m 2 fastene
½ inch.
3” 6” 7” 2”
3”
1
/
” (+ 45/64”
164
7” (+ 45/64” – 0
vel and the
d. Fasten th
onsible for s
iameter of
acer into the
ox bracket i
s.
0”)
”)
inverter
inverter
lecting the
inch.
bracket
: D3 = 14
Figure 4.3:
istances betwe
User G
ide DLX UL series
L00410625-01
n the fastener
2
3
cpin
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s
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4.1.2
Attac
1. Lo
2. Lif
3. En
scr N
Inver
.
h the invert
ate the hoo taps on the the inverter
er taps into
ure that the
ews on the
.
er
r to the mou
Fig
s for the car
Stringbox (B and guide t the slots an
inverter is s
ottom of th
nting brack
re 4.4: Fasten th
rier slots (A)
).
e upper ho
slide the in
curely align
Stringbox.
t as follows:
inverter to the
n the uppe
ks into the s
erter onto t
d in the bra
ecommend
bracket
back of the
lots on the i
e bracket. ket rails, an
d tightenin
inverter and
verter brac
fasten the i torque is 0.
the locating
et. Align the
nverter with 74 ft-lbf / 1.0
2
4.2.
  
24
t
A r C
C E t
ll electrical i
NOTI
Check electric
hecks
ake sure tha
rminals are i
verter. Refer
gulations.
eck that th
ecifications.
eck that th
sure that th
at they hav
E
hat the inve
l wiring.
Prior t
both the A
n a discharg
to 8.1. Switc stallations s
PV and the Refer to 10. inverter is
conductor
the correct
ter is proper
Electri
circuit brea
d state to p
-OFF. all comply
rid specific
echnical Da
roperly fast
are listed fo
olor coding
ly fastened a
cal Inst
ker(s) and th
event shock
ith the curr
tions are co a. ned and sec
r PV applicat
nd secured t
allatio
DC switch
hazards dur
nt local and
patible wit
red to the
ions and the
o the bracke
re OFF and
ng the instal
federal elec
the inverte
racket.
site environ
U
ser Guide DLX UL
prior to the
hat the
lation of the
rical
r
ent, and
series L00410625-
01
u
nre
E
4.3.
e
n
T
v
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s
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sure that th
gulations in
lectric
electrical i
force at the i
al Insta
stallation c
nstallation s
llation
mplies with te.
he local an
national ele
ctrical
Corr the e
ct electrical
tire PV syst
NOTI
he ele
with lo
User G
onnection i m.
E
trical conn
al and feder
ide.
critical for a
ctions must
l electrical r
igure 4.5: Simpli
chieving saf
e performe
egulations a
ied system over
, long-term
by qualifi d the instru
view
nd reliable
d persons a
ctions detail
peration of
nd comply
d in this
4.3.1
wo i
and
A
is, t
Vol
co is e
User G
Cond
.
mportant cri
oltage drop.
pacity refer
he greater it
tage drop i
ductor. It is
uivalent to
CAU
he co
to prev
ide DLX UL series
uctors
teria must b
Using corre
to the curre
capacity to the reducti ecommend
loss in energ
ION
ductor cros
nt overhea
L00410625-01
considered
tly sized co
nt-carrying carry curren
n of voltage
d to minimi
yield
section are
ing and fire.
in selection
ductors imp
apacity of th
. due to cross
e the syste
must confo
f conducto
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e conductor
section, cur conductor
m to the rat
sizes, name ciency of th
The larger t
ent flow an
oltage drop
ings of the N
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PV system.
e conducto
length of th Voltage dro
EC standard
r
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2
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adequately stance. ure conduct
. sharp edge
sized condu
rs so that t
s).
tors with th
ey are kept
correct te
way from o
perature rat
jects that ca
ng and sunl
n damage t
ght
e insulation
4.3.2
.
CAU
he co
have th
Conn
ION
ductors mu
e correct col
ection
t be listed f
r coding to
rea
r PV applica
avoid mater
ions and th
al damage a
1. CAN
2. RS-
3. Eth
4. Inte
5. Inte
6. Inte
7. DC f
8. Equi
Stri
site environ
nd bodily ha
bus terminal 85 terminal rnet connecti nal DC termi
S and -NEG
nal DC groun
/PE
nal AC termi
use board, Str
pment groun
gbox
ment and
rm.
n
al blocks,
terminal,
al block
ingbox
ing bar,
Figure
4.6: Customer c
DC
connection
AC
connection
Ne
opt
ions.
work conn
can be eithe
is performe
ctions are t
26
nnection area
a negative
differently
e same rega
r positive g
epending o
rdless of the
ounded PV
the grid co
different DC
tring config
figuration.
and AC con
U
ser Guide DLX UL
ration.
ection
series L00410625-
01
u
2
D• Theand• The
e
e
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v
4.3.
The
spe
.1. Con
LX UL String
Stringbox c
shipped wi
knock outs cified in the
uits
ox is equip
nnected to
h knock out
re located o
igure below
ed with kn
he bottom
for ¾” and
n the left an
.
ck-outs to fi
f the invert
” conduit fit
right sides,
the conduit r is made of
ings.
bottom and
fittings.
non-conduc
back of the
ive material
tringbox as
Figur
Us the
Pos
Dril
Car
Liste Strin
4.7: Knock out
a 1” hole sa
knock outs
ition the hol
l through th
fully file do
NOTI
For con the en Condui
DC c
AC c
Net
conduit fitt box knock
on the Stringb
to remove
or the 1” fitti
saw in the
cover.
n any roug
E
duit hubs, u losure
s are conne nduits are nduits are
ork conduit
ngs that fulf
uts:
x
the knock o ngs.
iddle of th
edges.
e only UL Li
ted to the S ounted on t ounted on t are mount
ill the follow
Figur
ts for the ¾
knock out f
ted raintigh
ringbox as f
e bottom
e right sid
d on the lef
ng criteria s
4.8: Removal o
fittings and
ce.
, or wet loca
llows:
f the String
of the Strin
side of the
ould be use
the knock outs
1- 5/16” hole
tion, hubs fo
ox.
box.
tringbox.
d for the DL
aw to remo
r entry into
HE- t UL
e
User G
ide DLX UL series
L00410625-01
2
7
4
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Table
Sy
4.3.3
Prop poin devic
.1: Recommend
bol Siz
A B C
D
E F
1
1
3
1
2
/
7 3
1
9
1
11
1
NOTI
Follow ground
Grou
.
r grounding for the con es.
Figure 4.9: Size
d size for the c
/
/ 28.8 mm
9
/
/ 35.8 mm
7
/
7.0 mm
/
/ 35.5
7
/
/ 42.5 mm
1
/
/ 45.3 mm
4
E
he guidelin
ing and tigh
ding
of the entir
uctive parts
criteria for con
nduits
s from the c ening torqu
PV system l
and facilitat
uits to fit the Str
nduit man .
mits voltage
s the operat
ingbox knock o
facturer reg
surges, give
ion of the ov
ts
rding conn
s a common ercurrent pr
ction,
reference
tection
DAN
Groun and na
ER
ing should ional electri
AC input an
unding, if re
gro res
onsibility o Photovoltai .41 through
res
onsibility o
PV
trings may ductors are
(Fi
ure 4.6, pos.
28
d AC output
uired by Se
the installer
System Gr
690.47 of th the installer
ave the neg
terminated
).
e carried ou
al regulatio
circuits are i
tion 250 of
unding shall
of the Nati
tive or the
t the equip
by qualified
s to prevent
olated from
he National
be installed
nal Electrica
ositive cond
ent groun
persons onl
shock hazar
the enclosu
lectrical Co
per the req
Code, ANSI
uctors grou ing bar in th
, and comp
ds.
e and that s
e, ANSI/NF
irements of NFPA 70 an
ded. The gr
e Stringbox
U
ser Guide DLX UL
y with local
stem
A 70, is the
ections
is the
unded
ia the GFDI
series L00410625-
01
u
m
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All Stri Foll reg All ter
etallic con
ngbox (Figu
ow the instr
rding grou
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inal GND a
duit fitting
e 4.6, pos. 8).
ctions and
ding requir f the DLX UL the AC ter
shall also b
pecification
ments.
inverters ar
inal block (F
bonded to
from the di
electrically
gure 4.6, pos
he equipme
ferent PV m
onded to g
6).
groundin
dule manuf
ound throu
bar in the
cturers
h the
4.3.4
he
inver
CAU
Groun Stringb potenti
DC C
.
C connectio er. The inve
DAN
Always can su
NOTI
When r the DC
ION
ed PV cond
ox and must als can appe
nnecti
ns include w
ter is config
ER
disconnect t
ply up to 60
E
moving th
switch is in t
ctors are gr NOT be gro
r and possi
ns (PV)
iring from th
red with a S
he PV array
VDC to the i
lower cover
e OFF posit
unded via t
nded at an
ly damage
e PV module
ringbox.
efore starti
verter whe
to access th on.
e GFDI to th other point lectrical co
s through a
g the DC co
exposed to
connection
e grounding
in the syste
ponents.
ombiner bo
nections, as
sunlight.
terminals e
bar in the
, as voltage
to the
the PV array
sure that
4.3.
User G
.1. DC T
ide DLX UL series
rminals
L00410625-01
Figure 4.10: D
terminal bloc
s
2
9
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