Specifications

14
BE1-87B Bus Differential Relay
(Request bulletin UHC)
BE1-87B Bus Differential Relay,
BE1-BPR Breaker Protection Relay,
BE1-81O/U Digital Frequency Relay
BE1-79M Multiple Shot Reclosing Relay
(Request bulletin UDL)
Application
Provides automatic reclosing of tripped circuit
breakers in power transmission and distribution
systems.
Features
• Instantaneous and maximum of three time delayed
reclosing attempts
• Direct reading thumbwheel switches for setting
reclose and reset delays
• Reclosing sequence may be selected via external
contacts
• Nonvolatile memory circuits retain operating data
• Individual alarm contacts for lockout, reclose fail, and
relay failure
• Instantaneous trip enable output for control of tripping
relays
• Output for blocking load tap changer (LTC)
• Reclose wait and special reclose functions
• Pilot reclose
BE1-81O/U Digital Frequency Relay
(Request bulletin UBR)
Application
Protects the system during over or underfrequency
conditions.
Features:
• Direct frequency trip settings
• Accuracy of ±0.003 Hz
• Pickup adjustable in increments of 0.01 Hz
• 40 to 70 Hz operating range
• Up to 4 independent over or underfrequency set points
• Undervoltage inhibit
Application
Provides economical high impedance differential
protection in single- or three-phase packages.
Features
• High Impedance Bus Differential
• Power supply fail alarm
• Alarm to alert for excessive steady state imbalance
• Unique shorted CT circuit diagnostic test function
NEW
3 BE1 PROTECTIVE DEVICES