3. Installation
3. Installation
1). Connect the three (3) AC conductors to the three (3) AC terminals marked “L1”, “L2” and
“L3”.Refer to local code and voltage drop tables to determine the appropriate wire size
and type.
2). Connect the grounding conductor to the terminal marked “PE” (protective earth, the
ground terminal).
Over-Current Protection Device (OCPD) for the AC side
To protect the inverter's AC connection line, we recommend installing a device for protection
against over-current and leakage, with the following characteristics noted in Table 3.2:
3.6 Making connections to the AC side of the inverter
WARNING
An over-current protection device must be used between the inverter and
the grid.
3.6.1 Connecting the inverter to the utility grid
All electrical installations must be carried out in accordance with the local standards and
the National Electrical Code® ANSI/NFPA 70 or the Canadian Electrical Code® CSA C22.1.
The AC and DC electric circuits are isolated from the enclosure. If required by section 250
of the National Electrical Code®, ANSI/NFPA 70, the installer is responsible for grounding
the system.
The grid voltage must be within the permissible range. The exact operating range of the
inverter is specified in Section 9 “Specifications”.
NOTE
Use AL-CU transfer (bi-metallic) terminal or
anti-oxidant
grease
with
aluminum
cables
and
terminals.
3.6.2 Wiring procedure
CAUTION
RISK OF ELECTRIC SHOCK.
Prior to starting the wiring procedure, ensure
that the three-pole circuit breaker is switched off and cannot be reconnected.
NOTE
Damage or destruction of the inverter's electronic components due to
moisture and dust intrusion will occur if the enclosure opening is enlarged.
CAUTION
Risk of fire if two conductors are connected to one terminal. If a
connection of two conductors to a terminal is made, a fire can occur.
NEVER CONNECT MORE THAN ONE CONDUCTOR PER TERMINAL.
.25.
.24.
Inverter
CSI-25K-T480GL01-UB
CSI-30K-T480GL01-UB
CSI-36K-T480GL01-UB
CSI-40K-T480GL01-UB
Rated voltage(V)
480V
480V
480V
480V
Rated output
power (kW)
25
30
36
40
Current rating for
protection device (A)
40
50
60
60
Table3.2 Over-current protection device characteristics for Canadian Solar inverters
1). Insert the conduit fitting into the opening and tighten the
counter
nut.
2). Attach the conduit to the fitting in the enclosure opening.
3). Insert the AC cable through the conduit into the inverter.
Connect the cable to grid terminal as below:
4).
Strip the cable approximately 1/2 inch
.
5).
Release the terminal screws and insert the wire
.
Torque to 3NM.
6)
.
Connect the equipment grounding conductor to the ground bar
.
7)
.
Connect the conductors to the AC terminals labeled L1, L2 and L3.
A
neutral
is
not
required
for
inverter
operation
.
(see Figure 3.12).
Figure 3.12
