Siemens SMIINV215R60XX, Инструкция по установке и эксплуатации

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Page 10 Copyri
Step 2 – Install the AC Branch Circuit Junction Box
DANGER Hazardous voltage. Will cause death or serious injury.
working on this equipment.
an AC branch circuit as listed on page
microinverter AC branch cir
DANGER Hazardous voltage. Will cause death or serious injury.
working on this equipment.
components of system wiring must be considered,
length of Trunk and Drop
WARNING ! Only use electrical system components approved for wet locations.
a. Size the AC wire gauge to account for voltage drop. Select the correct wire size
based on the dist
the breaker in the load center.
All components of system wiring must be considered, including internal voltage drop
within the length of
wire terminations must be quantified. There is also some resistance associated with
each circuit breaker. As all of these resistances are in series, they add together.
Since the same current is flowing through each resistance, the total voltage
total current times the total resistance. For a single
resistance is equal to two times the one
each of the three line currents and resistances must be calculated.
Use the voltage
correct wire size. NEC
conductors will not be adequate for microinverter bran
maximum allowable microinverters.
b. Install an appropriate junction
box at a suitable location on the
PV racking system
center feed the branch, or you
can install the junction box at
the end of a row of PV modules.
c. Provide an AC connection from
the junction box back to the
utility interconnection using
equipment and practices as
required by the NEC
jurisdictions.
1
National Electrical Code is Registered Trademark of the National Fire Protection Association
Copyright 2011 Siemens Industry, Inc.
Install the AC Branch Circuit Junction Box
Hazardous voltage. Will cause death or serious injury. Turn off Power before
working on this equipment. Do NOT exceed the maximum number of microinverters in
an AC branch circuit as listed on page 27 of this manual. You must protect each
microinverter AC branch circuit with a 20 A maximum breaker.
Hazardous voltage. Will cause death or serious injury. Turn off Power before
working on this equipment. Size the AC wire gauge to account for voltage drop. All
components of system wiring must be considered, including internal voltage drop within the
Trunk and Drop cabling.
Only use electrical system components approved for wet locations.
Size the AC wire gauge to account for voltage drop. Select the correct wire size
based on the distance from the beginning of the microinverter AC branch circuit to
the breaker in the load center.
All components of system wiring must be considered, including internal voltage drop
within the length of Trunk and Drop Cable. Typically, three wire sections
wire terminations must be quantified. There is also some resistance associated with
each circuit breaker. As all of these resistances are in series, they add together.
Since the same current is flowing through each resistance, the total voltage
total current times the total resistance. For a single-phase system, the total
resistance is equal to two times the one-way resistance. For a three
each of the three line currents and resistances must be calculated.
Use the voltage drop charts at: http://www.usa.siemens.com/microsolar
correct wire size. NEC
®1
guidelines for voltage drop on feeder and branch circuit
conductors will not be adequate for microinverter branch circuits that contain the
maximum allowable microinverters.
Install an appropriate junction
box at a suitable location on the
PV racking system. You can
center feed the branch, or you
can install the junction box at
the end of a row of PV modules.
ide an AC connection from
the junction box back to the
utility interconnection using
equipment and practices as
required by the NEC
R
and local
is Registered Trademark of the National Fire Protection Association
141-00015, Rev 01
Turn off Power before
xceed the maximum number of microinverters in
of this manual. You must protect each
Turn off Power before
Size the AC wire gauge to account for voltage drop. All
including internal voltage drop within the
Only use electrical system components approved for wet locations.
Size the AC wire gauge to account for voltage drop. Select the correct wire size
ance from the beginning of the microinverter AC branch circuit to
All components of system wiring must be considered, including internal voltage drop
Cable. Typically, three wire sections and several
wire terminations must be quantified. There is also some resistance associated with
each circuit breaker. As all of these resistances are in series, they add together.
Since the same current is flowing through each resistance, the total voltage drop is
phase system, the total
way resistance. For a three-phase system,
each of the three line currents and resistances must be calculated.
usa.siemens.com/microsolar to select the
guidelines for voltage drop on feeder and branch circuit
ch circuits that contain the