Fig ure 4.5 C onnec tion ar ea of inv erter (Fuse t ype)
DC1+
DC1-
DC2+
DC2-
L1 L 2
N
.13 .
4. Installation
Ple ase ref er figu re 4.5 an d 4.6 to co nnect t he DC1 an d DC2 in th e DC term inal of i nvert er,
the n conne ct the ar ray mou nting b ondin g condu ctor to t wo “PE” t ermin al of DC si de. The
DC wi re conn ected t o DC term inals ( shown i n Figur e 4.5 and 4 .6) is re comme nded
AWG 12- 8. Fo r fuse ty pe inve rter KL M-20 of C ooper B ussma nn or the s ame typ e, only
pro fessi onal ca n repla ce it.
Con nect gr id side o f inver ter:
The i nvert er is sui table f or 208V a nd 240V g rid. Pl ease se e table 4 .1 to con nect ca ble to
inv erter t ermin als. Du e to inve rter mo nitor s volta ge betw een L1 an d L2, Neu tral co uld be
eit her con necte d or not fo r 240V gr id. Gro und mus t be conn ect to th e PE term inal. T he
cab le for gr id conn ectio n to AC term inals ( “L1”, “ L2”, “N ” and “PE ”) is rec ommen ded for
AWG 4 -8. F or fu se type i nvert er, KLM- 30 of Coo per Bus smann o r the sam e type co uld be
use d, only p rofes siona l can rep lace it .
Bef ore ele ctric al conn ectio n Pleas e make su re belo w steps a re stri ctly fo llowe d:
a. Swit ch the Gr id Supp ly Main S witch ( AC) OFF.
b. Swit ch the DC S witch O FF.
.12 .
4. Installation
Term ina l conne ction s:
Bef ore c onne cti on, p lea se mak e sur e the po lar ity o f the ou tpu t vol tage o f PV ar ray
mat che s the“DC +”and “D C-”sy mbols.
Warn ing
Bef ore c onne cti ng in ver ter, pl eas e make sure t he PV ar ray o pen c ircu it vo lta ge is
wit hin t he lim it of t he inv ert er. Oth erw ise t he invert er co uld b e dama ged . The
max imu m allo wab le in put short c irc uit curre nt li mit o f the ph oto vol taic a rra y for ea ch
MPP T inpu t cha nne l is 10A dc fo r the 1- 3.6 kW models a nd it is 15Ad c for the 4-5 kW
mod els .
Ple ase d on’t c onn ect P V arra y pos iti ve or ne gat ive pole to t he gr ound , it co uld
cau se se riou s dam age s to the i nve rte r
Ple ase use q ualif ied DC ca ble for P V syste m.
Fus e type co nnect ion:
Str ip the en d of wire a bout 10 mm, loo se the sc rew on th e termi nal, th en inse rt the wi re
int o the ter minal . Tig ht the sc rews wi th the to rque of 5 Nm.
Non -Fuse t ype con necti on:
Str ip the en d of wire a bout 18 mm. Use a s lotte d screw drive r, inser t to the en d of the
ter minal A and i nsert t he wire i nto the t ermin al B. Loo se the sc rewdr iver, th e cable w ill be
fix ed in the t ermin al.
Fig ure 4.6 C onnec tion ar ea of inv erter (Non- Fuse ty pe)
Termi nal A
Termi nal B
Con nect PV s ide of in verte r:
For f use typ e: Dama ge to the i nvert er thro ugh the u se of fus es as dis conne cting
uni ts in the o utput c ircui t of the in verte r.
WARNIN G:
Dam age to th e DC Disc onnec t due to en large d knock outs.
Enl arged k nocko uts ena ble moi sture t o penet rate th e DC Disc onnec t which
cou ld dama ge elec troni c compo nents i n the DC Di sconn ect.
Note: