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Photovoltaic Multi VRF
4.10.2.2 Installation of PV battery component
PV battery component shall be used after acceptance of relevant department of Party A.
Common PV battery component is shown in the following fig.
Handle with care during transportation to avoid collision of PV component and PV
component, PV component and frame. The PV component shall be placed on the keel and
fixed by means of pressing. Pressing force shall be moderate, which meet the requirements of
wind shield and quake proof for PV component and frame, besides, not to damage the glass
due to tight casting die, which might result in unnecessary losses. Placement of PV component
shall be neat; location of junction box shall be on the upper surface.
NOTICE! The undefined installation notices shall refer to the installation requirements in
Article 690 of NFPA 70 and Section 50 of the CEC C22.1.
4.10.2.3 Cable pavement
Cable pavement shall be carried out from far to near. Generally speaking, for short-distant
cable transportation, the method of rolling cable shaft is adopted. The leading side of cable
shall be over the shaft. Decrease the friction with floor during traction process. Before
pavement, install and fix corresponding cable bridge first, each wire must be straight, no
distortion or knot.
Leave enough wiring length in both ends of combiner box and DC distribution box for cable
and make labels with tags in terminal. Add steel tube as protecting cover when cable wire is
passing through the road, after cutting, eliminate the burr and sharp edge in the nozzle of
protecting cover to prevent the cable wire being damaged while dragging.
When conducting setting out in each array, confirm the specification and model for wire
diameter adopted in that array according to the drawing. Before pavement, test the insulation
resistance with megameter to see if it is within the specified range.
Current carrying capacity of wire between PV component and junction box shall be 125%
of the sum of all PV component short circuits current. Moreover, add HDPE plastic tube for
protection and pre-cast steel tube in underground cable for protection. There cannot be sharp
burr in the steel nozzle to avoid scratching the cable. The bridge installed vertically in interior
wall shall be firm, straight line deviation is less than 0.5CM, do not damage interior wall
structure to ensure cleanliness of the wall.
Fig.4.10.2
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