Electrical Industry Canada: Arc Flash, Shock Hazard, & Fire Safety - 6

Q: How can end-users rest assured that they have a reliable system that
has increased system survivability?
With built-in isolation, each device can be set or configured as an isolator, which
is above and beyond the regulatory requirement. The code requires that each fire
zone (i.e., 1 floor area) be isolated so that a fault within one floor area cannot
affect normal operation of devices in another area. In other words, if a single fault
happens on that floor, it is understandable if that floor is gone or no longer visible
to the system, as long as devices on other floors are working normally. By setting
all devices on that floor as isolator, if a single wire-to-wire short or open or ground
happens between devices, all the devices on that floor are still working normally
and communication to the control unit is still maintained, even when one portion
of wiring in that floor is disabled. Therefore, the floor where the fault happened is
still protected! Here is another additional benefit: when a zone or floor is no
longer supervised by a fire alarm system, a Fire Watch (which could be costly) is
required. With ISOtechnologyTM, owners of the property could avoid the unnecessary
Fire Watch.
The image depicts how ISOtechnologyTM provides virtual circuit survivability and
a short in one zone does not affect another zone or impede normal system operation.
When the system remains fully operational when a single fault is applied, you
increase life safety guaranteeing an alarm is always received at the fire alarm
control panel. With all these elements in place, installers and end-users can rest
assured that they have a reliable system that has increased system survivability.
Implementing a secure and effective fire alarm system is one of the most important
considerations for large multi-story buildings, and Siemens recognizes the importance
of security and safety that comes with that. With ISOtechnology TM providing
fault detection and built-in solation, the system's overall safety and reliability is
improved, especially in case of emergency. Users benefit from ISOtechnology TM
since it not only enhances the safety system, but it also saves users' time and
money.
ELECTRICAL INDUS TRY CANADA
VOLUME 1, ISSUE 6
6

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Electrical Industry Canada: Arc Flash, Shock Hazard, & Fire Safety

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