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What is DC Power
Direct Current
What is AC power
Alternating Current
What Does a GFDI Fault mean on an Inverter
Ground Fault
How would you check a simple fuse to be operational?
Continuity check/OHM, voltage across fuse.
Once the fault is found what is the first step you take to replace the panel.
LOTO should be the first step before anything.
what component protects conductors from overcurrent?
Fuse/Breaker
Solar panels can still produce voltage even when the main breaker is off, why?
Sunlight
What tool detects hot spots in panels, connections, or breakers?
Thermal camera
What condition where resistance increases due to lose or damaged connections, causing heat?
High resistance fault
These devices track the sun to increase energy production.
Trackers
On a 480V system, phase to phase what reading would you get?
480V
If the fault is underground, what process would you use to ensure the health of the cable?
Insulation resistance test (Megger)
What component bring multiple strings into one output?
LBD/Combiner Box
What tool is used to verify absence of voltage before touching conductors?
Multimeter
This electrical hazard can occur when DC voltage exceeds safe limits.
Arc flash
The Law the states voltage equal current times resistance
Ohm's Law
Reduced output caused by dust, dirt, or bird sh!t on panels.
Soiling loss
This device allows isolation of power between the array and inverter.
DC Disconnect
The part of the panel that converts sunlight into electricity.
Solar Cell
MC4 connectors are rated for this type of current produced by PV modules.
DC current
What is the main difference between Delta-delta and Delta-Wye
Delta no neutral availability, Wye has neutral availability
This condition occurs when DC circuits continue to produce voltage after shutdown.
Back feed
The standard that governs electrical safety in the workplace.
NFPA 70E
These conductors carry power from the inverter to the grid.
AC conductors
This device automatically interrupts current during faults.
Circuit breaker