Instruction manual – AP901 Arc Protection Unit
6 (39
)
A1017B
2
G
ENERAL
AP901 is a sophisticated micro-processor based arc flash protection unit including complete
self-supervision functionality. It is designed to minimize the damage caused by an arcing fault
(arc flash) by tripping the circuit breaker sourcing the fault current. The AP901 complete system
self-supervision function provides the highest level of dependability by continuously monitoring
all internal system functions along with external connections.
AP901 is designed according to the latest protection relay standards and is hence suitable for
installations in rough environments, such as utility, traditional or renewable power plants, off
shore, marine, oil and gas, mining, steel or any other heavy industry applications and as well
commercial and institutional electrical systems. AP901 is suitable for either medium voltage or
low voltage switchgear and motor control center applications in both new and retrofit
installations.
2.1
A
RC PROTECTION UNIT
AP901
FEATURES
AP901 is a multipurpose arc flash protection unit and can be applied for variety of applications.
AP901 can be used as a stand-alone unit or as part of a more complex arc protection system
through the binary bus. Main features of AP901:
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80-265Vac/dc auxiliary power supply or optional 24-72Vdc power supply
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4 arc point sensor channels
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1 arc fiber loop channel (optional)
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2 binary inputs (nominal voltage of 24 or 110 or 220Vdc)
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3 normally open trip relay outputs (direct trip circuit rated)
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1 normally open or optionally normally closed (electronic lock-out) trip relay output
(direct trip circuit rated)
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1 binary output (24Vdc)
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1 system failure relay output
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12 Indication LEDs
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Push-button
