Test 12 Flashcards
Most utility electrical power is produced by rotation generators that are mechanically driven.
True
Interactive inverters act like a voltage source, while generators act like a current source.
False
The most common type of interactive PV system is one that does not use energy storage.
True
All utility-interactive inverters must be able to detect power outages and discontinue transfer of power until the utility system returns to normal operation.
True
Three-phase inverter output can be achieved by using three smaller inverters and connecting each inverter to a different phase.
True
In dwellings, the sum of the ratings of the overcurrent protection devices feeding the busbar or conductor may be up to 150% of the rating of the panel or busbar.
False
Electromechanical induction watt-hour meters are the most common type of meters installed by electric utility companies.
True
Qualifying-facility agreements are intended for small interconnected PV systems.
False
Liability insurance is required by most utilities that have interconnection standards.
True
Every state has established rules regarding interconnection and metering.
False
_____ generation is a system in which many smaller power-generating systems create electrical power near the point of consumption.
Distributed
____ systems are interactive systems that include battery storage.
Bimodal
___ systems can be employed to manage and optimize utility energy use by utility customers that are billed using time-of-use rates.
Bimodal
In the United States, the technical requirements for PV systems are established through national codes and standards published by ____.
Institute of Electrical and Electronics Engineers (IEEE), Underwriters Laboratories (UL), and National Fire Protection Association (NFPA) (all of the above)
Article 690 permits the output of interactive PV inverters to be connected to the ____ side or supply side of the service disconnect.
load
____ circuit breakers are circuit breakers on the load side of the main service disconnect that supple PV power to the busbar.
Back-feed
The service conductors in a supply-side connection must be sized for at least ____% of the continuous load current, based on the PV system inverter maximum current output rating.
125
____ metering records exported and imported electricity separately.
Dual
A(n) ____ is a non-utility large-scale power producer that meets the technical and procedural requirements for interconnection to the utility system.
qualifying facility
A(n) ____ agreement is a contract between a distributed power producer and an electric utility that establishes the terms and conditions for the interconnection.
interconnection
____ is the process of connection a generator to an energized electrical system.
Synchronizing
Inverter power output is limited by the capacity of the PV array, the inverter output rating, and ____.
temperature
____ is the undesirable condition where an interactive inverter continues to transfer power to the utility grid during a utility outage.
Islanding
Interconnection on the load side of the service disconnect is done through ____ circuit breakers.
back-feed
A ____-side connection of interactive PV systems requires adding another service in parallel with an existing service disconnect.
supply
____ metering uses one meter that can operate in both directions, effectively subtracting exported electricity from imported electricity.
Net
____ cost is the cost that utility would normally incur to generate a given amount of power.
Avoided
A(n) ____ is a contract between a utility and a qualifying facility that establishes the terms and conditions for interconnection and the rates or tariffs that apply.
qualifying-facility agreement
____ rights allow the utility to check for listed equipment and proper installation before interconnection.
Inspection
_____ agreements establish some means to credit the customer for excess power supplied to the utility.
Interconnection
