Arcflash Reduction Maintenance System
A circuit breaker equipped with Eaton’s Arcflash Reduction Maintenance System (ARMS) can greatly improve safety and protection to personnel by effectively limiting the destructive energy generated by an arc fault. Work locations downstream of a circuit breaker with an Arcflash Reduction Maintenance System can have a significantly lower incident energy level – resulting in more reliable and higher built-in safeguards of protection for personnel and equipment.
ARMS technology is based on the realization that when working on energized electrical equipment, a fault that occurs within that gear needs to be cleared as quickly as possible. While this seems obvious, in actual installations, intentional delays are included in upstream devices to ensure selective coordination with downstream devices. This means that if a fault were to occur inside the equipment the downstream breaker might never clear the fault regardless of how much delay is or isn’t programmed in the upstream breaker. Because upstream breaker clearing delay is not necessary, ARMS permits removing this delay while working inside live electrical equipment.
While other Eaton technologies such as ZSI can help, ARMS takes the ZSI solution a step further by providing “faster than instantaneous” clearing times. When ARMS is enabled, the internal circuit breaker digital logic is bypassed by an even faster analog tripping circuit.
While other Eaton technologies such as ZSI can help, ARMS takes the ZSI solution a step further by providing “faster than instantaneous” clearing times. When ARMS is enabled, the internal circuit breaker digital logic is bypassed by an even faster analog tripping circuit.
 | IZM Series Air Circuit Breakers Eaton’s Series IZM Low Voltage Air (Power) Circuit Breakers enable comprehensive solutions to meet and exceed the unique and wide-ranging requirements of today’s global power distribution systems. |
 | Protective Relays with ARMS Eaton's E-Series protective relays include built in ARMs functionality. |
 | Power Xpert CX Modular Switchboard System with ARMS The ARMS functionality can be built into Eaton’s innovative modular switchgear system when IZM Series air circuit breakers, configured with ARMS, are installed as main and/or feeder protective devices. |
 | xEnergy Low Voltage Licensable System with ARMS ARMS functionality can be integrated by licensed panel builders into the xEnergy system when ARMS ready IZM/Magnum breakers are installed as main and/or feeder protective devices. |
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