Delta M50A 261 Operation And Installation Manual page 30

Grid-tie transformerless solar inverter
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Installation
M70A / M50A support Cu stranded, Cu flexible conducor, Al stranded wire,
aluminum solid (include sector wire)
Cu stranded
• Cu:
The Cu flexible wire need stamp with terminal, for the other model wiring with
bear wire is available.
• Al:
The oxide layer at the end of the terminal must be removed when
connecting the aluminum wire. After removing the oxide layer,
we recommended cost the neutral fat or acid-free, alkali-free
vaseline on the end of the conductor and connect the conductor
immediately. It's necessary to treat the oxide layer when reconnect
the wire.
* The sector wiring direction is shown as right figure.
If not following the above pretreatment, the contact resistance will
-
increase significantly which will lead to the excessive temperature
rise, even catch fire.
M70A
_260
M50A
_260
M50A
_261
M50A
_240
Cu flexible wire
(need press with terminal)
WARNING !
D1
D2
D3
D1
Figure 3-14: AC Gland with multiple inlet
Al stranded
D4
D5
D2
D3
30
Aluminum solid
(sector) *
P
P

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M50a 260M70a 260M50a 240

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