Specifications

12
BE1-50/51M Time Overcurrent Relay,
BE1-50/51B Time Overcurrent Relay,
BE1-67 Phase Directional Time Overcurrent Relay,
BE1-51 Time Overcurrent Relay
BE1-51 Time Overcurrent Relay
(Request bulletin UDA)
Application
Versatile AC/DC powered microprocessor relay
provides overcurrent protection for phase and
ground applications.
Features
• Single-phase, three-phase, two-phase with neutral,
or three-phase with neutral configurations
• Zero, one, or two instantaneous outputs
• Available with voltage control or voltage restraint
• Sixteen field selectable time-current curves
• High dropout ratio
BE1-50BF Breaker Failure Relay
(Request bulletin UBT)
Application
Provides protection and security for the power
system against failure of the monitored breaker.
Features
• Cycle control timer sets failure detection window
• Less than 1 millisecond fault detector reset time
• Two independently timed initiation/control inputs
• Field adjustable logic
• Wide operating frequency range
• Three breaker fail outputs plus one instantaneous
retrip
BE1-50/51B Time Overcurrent Relay
(Request bulletin UHD)
BE1-50/51M Time Overcurrent Relay
(Request bulletin UHE)
Application
Self-powered, microprocessor, single-phase time
overcurrent relay provides overcurrent protection
for phase and ground applications.
Features
• Self-powered from 50/60Hz systems
• Independent instantaneous element 1 or 5 Amp CTs
• Replicates decaying reset of electromechanical relays
• Drawout construction
• Direct reading controls for settings even when the
relay is powered down
Application
Single-phase self-powered, microprocessor based
time overcurrent relay. Provides protection in
applications requiring time delayed coordination for
phase or ground overcurrent conditions.
Features
• Self-powered from 50/60Hz systems
• Independent instantaneous element 1 or 5 Amp CTs
• Replicates decaying reset of electromechanical relays
• Drawout construction
• Direct reading controls for settings even when the
relay is powered down
• Field-selectable curves including ABB/CO, British
Standard, and GE IAC (200 Series only)
• Standard magnetically latched targets
• Compact size C1 case (6.88"W x 4.00"H x 7.00"D)
• Continuous automatic calibration
• Available in four-unit vertical rack
• Field-selectable curves including ABB/CO, British
Standard, and GE IAC (200 Series only), and wide
pickup range simplifies specifying and stocking
• A1 or S1 case
• Testable in the case
3 BE1 PROTECTIVE DEVICES