Electricity Flashcards
Who must be contacted when dealing with any incident in close proximity to or involving overhead lines?
The TNCC (transmission control centre) via fire control
What details must be given to TNCC when dealing with an incident involving high voltage lines?
Details of the incident
Location
Voltage
Equipment type (pylon/sub-station etc)
Equipment ID number/reference
Circuit number
When dealing with an incident involving high voltage equipment, who will advise that it is safe to carry out action and how?
A National Grid standby engineer will contact the IC and relay and any relevant safety information
What is the minimum safe distance when conducting a rope rescue?
5m
What is the safe minimum distance when using ladders, aerial appliances or tall equipment (and not using hose)?
10m or 20m in training
What is the safe minimum distance if dense smoke or flames are approaching the conductors?
10m
What is the safe minimum distance when using hoses & power is isolated?
20m
What is the safe minimum distance when using monitors and power has been isolated (ground or aerial)?
30m
What are the hazards associated with the batteries used in PV systems?
maintain electrical supply when the rest of the system is isolated
What are the hazards of attending an incident involving a wind turbine?
Risk of collapse
Generating electricity when turbine moving
falling debris over large area
Difficult to isolate and control without specialist help
remote lovations
Anaerobic digestion uses the natural breakdown of biomass feedstock to produce renewable biogas, which can then be used to produce electricity and heat. Examples of this feedstock are?
Animal slurry, food waste
The liquid inside of a solar thermal / water heating system is known heat transfer fluid, and can reach temperatures of what?
200 degrees
In relation to hydropower what are the three types of hydroelectric schemes?
Diversion, Impoundment, pumped storage
Similar to PV systems, the electricity generated by wind turbines is?
DC
if a break down of insulation occurs, excessive current will probably flow the fault, and if the fuse or circuit breaker fails to operate, overheating will result. What can cause a breakdown in the insulation?
nails driven into walls penetrating wires or tools striking cable runs
abrasion
excessive heat
deterioration from age of material
