Westinghouse AC System, Руководство по установке

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Westinghouse Solar AC Installation Guide
Copyright © 2011 - Westinghouse Solar 16 | P a g e
conductors and what types of materials you will need to use in reference to the U.S.
NEC, if applicable.
3. Electrical Line Diagram
The sample Electrical Line Drawings in the appendix are provided as a starting point. Three
drawings (15 panels, 30 panels and 40 panels) are provided that include multiples of 15
Westinghouse Solar AC Panels in branch circuits. Use the sample drawings as a template, and
identify the exact number of panels in your system. Completing your electrical line diagram circuit
can be as simple as labeling the equipment rating and defining whether you are wiring the system
with Romex or using a conduit with individual conductors. The following details should be
provided:
•
Type of utility meter, voltage rating, and phase (bi-directional utility meter, 240
VAC, 1 Phase).
•
Main panel manufacturer, main panel bus rating, main disconnect rating (Square D,
200 A rated main panel, 200 A main disconnect).
• The grounding electrode and an appropriately sized conductor grounding the main
panel.
•
The voltage, number of poles, and circuit protection rating of the breaker used to
interconnect with the main service, (240 V, double pole, 30 amp breaker).
Conductor sizing, overcurrent protection, load centers, disconnect switches, and other equipment
must be sized according to the National Electrical Code, in addition to any special requirements of
the local permit jurisdiction. Special considerations for solar include, but are not limited to, the
following:
•
Conductors and connectors used on the roof must be rated for 90 degrees C
• Conductors on the roof should have their ampacity de-rated for a temperature of at
least 70 degrees C.
•
Voltage drop between the array and the main panel should not exceed 1.5%.
•
The sum of the overcurrent protection of all power sources (line + PV) feeding a bus
bar or conductor must not exceed 120% of the current rating of that equipment.
•
Warning labels as required by your local jurisdiction.
4. Grounding
Rows of Westinghouse Solar AC panels spliced in the East-West direction are bonded by the same
stainless steel splices that connect the panels structurally. The North-South bracket provides
grounding when used with grounding washers for columns of Westinghouse Solar panels.
Westinghouse Solar splices are a UL listed grounding component. At the end of each row in the
east-west orientation there is a factory designated bonding location for attaching a lug.