Key switch for emergency lights

[pirate]

Yes, that's pretty much it. Basically, a P/L which keeps the battery charged. However, should the RCBO trip, the emergency option is triggered, and the luminaire stays lit, on battery power. They have an LED on the frame which shows green when all is well and the battery is charging, and red when in emergency mode. Thus, when the luminaire is switched off, at the switch, the battery is still being kept on charge. Tripping the RCBO simulates a loss of power. That is how it is tested, instead of having a key switch in the circuit.

 

[bhamoggy]

So the drawing is correct for both outcomes?

 

[westward10]

The top drawing is preferred as the test facility only isolates the permanent supply, the bottom drawing will also isolate the general lighting.

 

[Mikegh]

The top drawing is preferred as the test facility only isolates the permanent supply, the bottom drawing will also isolate the general lighting.

Is it the same lamp powered by the switched live as the battery

You turn off the switched live ,the lamp goes out and then the key switch brings it back on to prove the backup system ?

 

[Mikegh]

Led maintained bulkhead

What 50,000 hrs life ,low.wattage

Is there any need to be messing with switched lives ?

Keyswitch or rcbo as above and leave it on 24/7 I dunno ?

 

[westward10]

Is it the same lamp powered by the switched live as the battery

You turn off the switched live ,the lamp goes out and then the key switch brings it back on to prove the backup system ?

A maintained emergency light can act in the same way as a normal general light the only difference being the separate permanent supply controlled by the test facility. Aside from that it will switch on and off like any normal light. A maintained fitting will generally have four terminals L1, L2, N and earth although manufacturers may identify the terminals different for L1 and L2.

 

[Mikegh]

A maintained emergency light can act in the same way as a normal general light the only difference being the separate permanent supply controlled by the test facility. Aside from that it will switch on and off like any normal light. A maintained fitting will generally have four terminals L1, L2, N and earth although manufacturers may identify the terminals different for L1 and L2.

Ya I'm familiar with that

What about the led why bother with on/off

 

[westward10]

Ya I'm familiar with that

What about the led why bother with on/off

I'm not sure what you mean.

 

[Mikegh]

I'm not sure what you mean.

Why bother using it as a general light with backup

With LEDs characteristics long life and low power

I would have thought just keyswitch to L1+L2 and permanently maintained

 

[Mikegh]

Can happen sometimes in an emergency that the general lighting isn't on

Makes sense then to leave the led permanently maintained