Incidents Involving Solar Panels (PN 839) Flashcards Preview

LFB Policy Notes & FRU (2020) > Incidents Involving Solar Panels (PN 839) > Flashcards

Flashcards in Incidents Involving Solar Panels (PN 839) Deck (25)
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1
Q

There are 8 Hazards listed in the ‘key point summary’ for incidents involving Solar Panels. Can you name 6?

A
  • Electricity
  • Working at height
  • Structural roof collapse
  • Fittings failure causing panel to fall
  • HAZMATs
  • Sharps
  • Steam/Hot pressurised water
  • Confined Spaces
2
Q

En-route to an incident involving Solar panels the IC should ensure that full PPE is donned, crew is briefed on hazards and that the MDT is used to gain information.

What other item of equipment should be considered?

A

Electrical Gloves

3
Q

At large commercial, industrial or solar farms what 3 things must be ascertained as soon as possible?

A

1) Site specific plans
2) The location of inverters
3) The Voltage (V) or Current (Amp) being produced

4
Q

The IC should consider an early request for who?

A

The Authorised Person from the power company or (where available) the system installer for advice

5
Q

If the Mains Fuse has been removed by the authorised person are crews safe to approach the equipment?

A

No, not unless the Direct Current Inverter has been isolated as power to the building may still be energised

6
Q

What tactics may the IC consider using until the power is confirmed isolated?

A

Defensive

7
Q

What does PV stand for?

A

Photovoltaic

8
Q

A series of PV panels linked together is known as what?

A

A STRING, with one or more strings bring known as an ARRAY

9
Q

PV cells can produce Direct Current (DC) in excess of how many volts?
A) 1000
B) 10000
C) 100000 v DC

A

A) 1000 v DC

10
Q

What is the DC from the cells converted into at the inverter?

A

240 v AC (Alternating Current)

11
Q

Will the application of a heavy Tarpaulin over panels in strong sunlight cut the power produced?

A

No, tests have shown that it will reduce the output not stop it.

12
Q

The power can only be isolated at the inverter. Short heavy cabling is used from the panels to the inverter. So where is it usually found?

A

The roof space

13
Q

A standard 250w panel will produce approximately 30v which is how many Amps DC?

A) 3
B) 8
C) 18

A

B) 8 Amp DC

A large domestic installation of 16 panels (4KW Array) could therefore be producing 480v or 128 Amp DC

14
Q

Where Solar Panels begin to emit gases, leak fluids (other than water) or batteries are affected by fire who should the IC consider requesting?

A

The Hazardous Materials and Environmental Protection Officer (HMEPO)

15
Q

Solar Hot water heaters are bulkier and the panels contain pipework. The water is simply heated by being exposed to sun light. At what temperature does the boiler typically activate to ‘top up’ the temperature?

A

50 and 55 degrees centigrade are BOTH listed in the note. So between 50 and 55 degrees Centigrade is probably the best answer, a temperature which under pressure can cause burns and scalds

16
Q

Can scene lighting or moonlight generate electricity in a PV panel?

A

Yes, even an unwired panel taken out of its wrapping will begin to generate electricity

17
Q

Are the DC wires (panel side of the inverter) earthed in this type of system?

A

No, therefore firefighters working very closely to the wiring may complete the circuit

18
Q

Solar panels can weigh between 14-27kg per square metre. Why is this a concern, particularly in a fire?

A

The increased load can effect the integrity of the roof.

19
Q

When might the following toxic and/or Carcinogenic chemicals be an issue during an incident involving solar panels:?

Cadmium telluride
Gallium Arsenide
Phosphorus

A

During a fire or explosion when the panel frame can quickly degrade

20
Q

Battery banks are sometimes used to store surplus energy, what 2 hazards can these batteries produce when exposed to fire?

A

1) Toxic and Corrosive fumes

2) Flammable and Explosive Gases

21
Q

What is classified as ‘High Voltage’?

A

1000 volts AC
or
1500 volts DC

Electrical gloves/gauntlets must not be used above 3300 volts

22
Q

On arrival at an incident involving solar panels what should the driver/IC consider?

A

Appliance positioning to allow for the siting of an Aerial Appliance

23
Q

The safe working area below a roof with solar panels can be difficult to gauge, why?

A

Panels may ‘plane’ and fall some distance from the building

24
Q

The solar panel isolation switch may be located in 2 places, where are they?

A

1) The fuse board/consumer unit

2) On or near the inverter

25
Q

What should an IC consider using both outside and inside a building where solar panels are involved?

A

Safety Officers with a specific brief