YASKAWA Solectria PVI 25TL-208 Installation And Operation Manual page 46

Installation and Operation Guide SOLECTRIA® PVI 25TL-208, PVI 50TL-480 and PVI 60TL-480
NUMBER OF MPP TRACKING ZONES
NUMBER OF PV SOURCE CIRCUITS (FUSED INPUTS)
MAXIMUM PV CURRENT (ISC X 1.25) PER ZONE / TOTAL
MAXIMUM RECOMMENDED DC-TO-AC RATIO
Select the DC conductor size and material for the inverters according to the following configuration table:
PVI 25TL-208
PVI 50/60TL-480
PVI 25TL-208
PVI 50/60TL-480
AND BYPASS
TERMINAL
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.
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.
DOCR-071030-A (10/7/2022)
Table 3-5 DC Conductor and Torque Specifications
75/90˚C Copper only when
terminating to the fuse holders.
Terminals are 90˚C rated.
Copper only when terminating to
the fuse holders. Terminals are 90˚C
Copper or Aluminum when using
the Bypass Terminal kit accessory.
Terminals are 90˚C rated.
PV Fuses
3
2 per MPPT zone;
6 total
45 A / 90 A
1.8
WIRE MATERIAL
rated.
INFO ✔
3
5 per MPPT zone; 5 per MPPT zone;
15 total
68 A / 204 A
1.8
ACCEPTABLE
CONDUCTOR
SIZES
14 to 6 AWG
14 to 6 AWG
6 to 2 AWG
3
15 total
68 A / 204 A
1.5
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