Installation
inter-tie. The PV100S is a balanced, three-phase, current-sourcing inverter and only operates with the presence of a stable utility voltage. The transformer is also supplied with a neutral connection on the utility interconnect. Connection of this utility-side neutral does not affect the operation of the inverter, however connection of the neutral on the inverter-side does affect the operation and must be left floating or disconnected. Single-phase, grounded loads, which may be present between the transformer and utility, will maintain their existing ground reference at the utility distribution transformer.
CAUTION: Equipment Damage
If the Isolation Transformer (T6-X0) neutral terminal is tied to ground, it will cause irreparable damage to the PV100S. Check local regulations for their requirements regarding the connection of these neutrals.
WARNING: Lethal Voltage
Grounding the neutral of a Wye-wound transformer may create an “open delta” condition, depending on the utility configuration. This condition may keep the PV100S from detecting a loss of phase condition on the utility system, which may allow potentially lethal voltage to be present on the open phase wiring.
Wiring - Specific
This section provides information for connecting the AC and DC conductors, ground conductors, and AC Sense Harness.
AC Connections
To connect the main inverter to AC interface/transformer assembly:
1.Remove the access panels from the front of both the Main Inverter Enclosure and the Transformer Enclosure. Additionally, open the front door to the Main Inverter Enclosure.
2.Route the AC power conductors A, B, C phase cables and ground conductor through the conduit between the main inverter to the AC interface/transformer assembly (T6).
Route the AC cables from the Inverter Enclosure through the conduit to the Transformer Enclosure.
AC Sense Harness (partially hidden below AC Cables)
Inductor Enclosure
Transformer Enclosure
Figure 3-12Route AC Cables through the Conduit