PV 2 Flashcards
A static structural load due to the weight of accumulated snow
Snow load
The estimated temperature of a module operating in a specific mounting system design
Installed nominal operating cell temperature
The maximum value of a 3 sec gust at 33’ (10m) elevation, which is used in wind loads calculations
Basic wind speed
A dynamic structural load due to the weight of temporary items and people using or occupying the structure
Live load
A dynamic structural load due to periodic motion
Vibration load
The addition of lumber under a roof surface and across trusses or rafters as supplemental structural support
Spanning
A type of fixed tilt array mounting system where modules are affixed directly to an existing finished rooftop or other building surface with little or no space between a module and the surface
Direct mount
An array mounting system that uses no electrical means to automatically direct an array mounting towards the sun
Passive tracking mount
A static structural load due to the weight of permanent building members, supported structure, and attachments
Dead load
The condition when a vibration frequency matches the fundamental frequency of the structure
Resonance
An attachment method that relies on the weight of the array, support structure, and ballasting material to hold the array in position
Self ballasting
An array mounting system that uses electric motors and gear drives to automatically direct the array towards the sun
Active tracking mount
An array mounting system that permanently secured modules in a non-movable position at a specific tilt angle
Fixed tilt mounting system
a type of fixed tilt array mounting system where modules are supported by a structural parallel to and slightly above the roof surface
Stand-off mount
A type of array mounting system where modules are installed at an elevation on a pedestal
Pole mount
A device that prevents conductors or devices from reaching excessively high temperatures under high current loads by opening the circuit
Over current protection device
A diode used to pass current around, rather than through, a group of PV cells
Bypass diode
A conductor connecting exposed metallic equipment, which might inadvertently become energized, to the grounding electrode conductor
Equipment grounding conductor (EGC)
The current that a conductor can carry continuously under the conditions of use without exceeding its temperature ratings
Ampacity
A circuit breaker that allows current flow in either direction
Back fed breaker
The automatic opening of conductors involved in a ground fault
Ground fault protection
The maximum over current that an over current protection device is able to stop without being destroyed or causing an electrical arc
Interrupting rating
The circuit connecting the PV source to the rest of the system
PV output circuit
A conductive rod, plate, or wire buried in the ground to provide a low resistance connection to the earth
Grounding electrode
The circuit connecting a group of modules together and to the common connection point of the DC system
PV source circuit
