AF0100 Arc-Flash Relay
GENERATOR APPLICATION GUIDE
6
Littelfuse.com/ArcFlash
© 2017 Littelfuse Products
Alarm on Unit Health
Configurable to non-failsafe
to prevent alarms where
generators/battery banks are
frequently cycling on/off) in
order to avoid nuisance alarms.
PGA-LS10 Sensor
Monitors breaker
compartment on
the line side of the
generator breaker.
24 Vdc Supply
Uses the battery banks and
commonly available generator
supply voltage.
To Generator Breaker
Disconnect from bus which may include
parallel generators or the utility.
To AVR
Shut down the generator. This
could be an emergency stop or
other control circuit.
Small form factor to fit in tight spaces of mobile gensets.
PC CONNECTION
TRIP OUTPUT #1
TRIP OUTPUT #2
100-240 VAC/DC
SUPPLY
24-48 VDC SUPPLY
DIGITAL INPUTS/OUTPUTS
UNIT HEALTH
AF0100 CONNECTION DIAGRAM
Generators are often the last line of defense in powering and protecting critical applications. The generator breaker
is the last line of defense protecting the generator itself: there is no protection at all between the line side of the
breaker and the generator. The AF0100 includes two Form-C Trip outputs that quickly respond to an arc flash, turning
off the generator using the AVR or other control circuits and disconnecting from the utility or parallel generators by
tripping the generator breaker. The AF0100 can be supplied directly off a battery bank and withstand the challenging
environment, vibration, and space requirements of a generator application.
TWO
ARC-FLASH
SENSOR
INPUTS
