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Sub-circuit monitoring
Sub-circuit monitoring
Hold-off/changeover relays
It is a mandatory requirement that Emergency Lighting is energised in
the event of a local sub-distribution failure, not just on total building
supply failure.
Hold-off & sub-circuit monitoring relays are used to energise luminaires in
the case of local supply failure. They may be used to feed more than one
luminaire on the same switched circuit and are available in 1 amp, 8 amp &
12 amp versions.
Hold-off relays
Hold-off relays are required to monitor the relevant lighting supply circuits
such that a failure brings on the emergency luminaires automatically in the
event of local supply failure.
Non-maintained luminaires are connected to a localised sub-circuit hold-
off relay fed from a maintained battery system. These luminaires are only
energised when the supply to the hold-off relay fails.
5, 10, 15 and 20 way sub-circuit monitors (with 12 amp hold-off relay)
are available.
Maintained
Do not require sub-circuit
monitoring or hold-off relays
Non-maintained
Require a hold-off relay
(1 per circuit)
Switched maintained
Require a changeover relay
(1 per switched circuit)
Description
Part No.
5 way 12 amp hold-off relay
ELD9600.001
10 way 12 amp hold-off relay
ELD9600.002
15 way 12 amp hold-off relay
ELD9600.003
20 way 12 amp hold-off relay
ELD9600.004
Description
Dimensions HWD Part No.
230 volt 1.0 amp mains changeover relay
155 x 43 x 30mm
SI230DIM
230 volt 1.0 amp mains changeover relay in remote enclosure 200 x 130 x 40mm
SI230DIM-S
230 volt 8 amp mains changeover relay with 2 x 2.5mm
2
terminal capacity
200 x 130 x 40mm
ELD9600.010
Changeover relays
The basic use of a switched maintained system is to energise the emergency
lighting when required by operation of the local switched supply but
automatically illuminate in the event of local sub-circuit supply failure
(irrespective of the position of the local switch).
SI230 changeover relays are compact and easy to install. When using these
changeover relays switched maintained emergency luminaires are energised
whenever a local switched supply is present and, automatically, when a
local sub-circuit failure occurs.
Emergi-Lite offer a Conversion Service to install integral changeover relays
into your free-issue mains luminaires. IP20 rated enclosures are supplied
as standard. Changeover relays are available with an IP65 enclosure as an
option, please contact Emergi-Lite for further details.
SI230 changeover relay