Installation and Operation Guide SOLECTRIA® PVI 25TL-208, PVI 50TL-480 and PVI 60TL-480
DOCR-071030-A (10/7/2022)
Page 46 of 131
NUMBER OF MPP TRACKING ZONES
3
3
3
NUMBER OF PV SOURCE CIRCUITS (FUSED INPUTS)
2 per MPPT zone;
6 total
5 per MPPT zone;
15 total
5 per MPPT zone;
15 total
MAXIMUM PV CURRENT (ISC X 1.25) PER ZONE / TOTAL
45 A / 90 A
68 A / 204 A
68 A / 204 A
MAXIMUM RECOMMENDED DC-TO-AC RATIO
1.8
1.8
1.5
Select the DC conductor size and material for the inverters according to the following configuration table:
Table 3-5 DC Conductor and Torque Specifications
WIRE MATERIAL
ACCEPTABLE
CONDUCTOR
SIZES
PVI 25TL-208
75/90˚C
Copper only
when
terminating to the fuse holders.
Terminals are 90
˚
C rated.
14 to 6 AWG
PVI 50/60TL-480
Copper only
when terminating to
the fuse holders. Terminals are 90
˚
C
rated.
14 to 6 AWG
PVI 25TL-208
PVI 50/60TL-480
AND BYPASS
TERMINAL
Copper or Aluminum
when using
the
Bypass Terminal
kit accessory.
Terminals are 90
˚
C rated.
6 to 2 AWG
INFO
✔
Even though the SOLECTRIA PVI 25TL-208, PVI 50TL-480, and PVI 60TL-480 3-Phase Inverters are designed
operate with ungrounded arrays, the PV system requires a DC equipment grounding conductor (EGC) to ensure
operational safety. The grounding busbars are electrically bonded by way of the inverter chassis.
PV Fuses
The SOLECTRIA PVI 25TL-208, PVI 50TL-480, and PVI 60TL-480 inverters are shipped with factory installed touch-
safe fuse holders and 20 A fuses as factory standard. Ensure that the appropriate fuse values are used for the
conductors in the PV source circuit and in accord with NEC 690.9.
Yaskawa Solectria does not supply fuses.
(1)
Each DC input conductor for the PV string requires fuse protection. (2014 NEC and earlier editions only)
(2)
The voltage rating of the fuse must be at least 1000VDC.
(3)
The ampere rating of the fuse is generally selected as 1.56 × module Isc of the PV string. Refer to NEC 690.8
for circuit sizing and current requirements.