Specifications

11
BE1-32O/U Directional Over/
Underpower Relay and BE1-32R
Directional Overpower Relay
(Request bulletin UBU)
Application
The BE1-32O/U Directional Over/Underpower
relay and the BE1-32R Directional Overpower
relay are solid state devices that protect machines
and systems against underpower and overpower,
and reverse power flow conditions.
Features
• Senses actual power flow (EI cos θ)
• Operating range down to a power factor of 0.1
• Sensitivity not affected by negative sequence
currents
• Input configurations available for single and
multiple phases
• Sensing ranges cover 0.5W to 6000W secondary
• Instantaneous, definite, or inverse time
characteristics
• Supplied in S1 or M1 case, depending on options
BE1-40Q Loss of Excitation Relay
(Request bulletin UBW)
Application
Protects 50 or 60 Hz synchronous generators against
the consequences of loss of field conditions.
Features
• Measures Var flow to sense loss of excitation
• Trip characteristics are defined on complex plane
for ease of application
• Definite time characteristics
BE1-46N Negative Sequence Overcur-
rent Relay
(Request bulletin UDJ)
Application
Protects machines against excessive heating damage
due to prolonged current unbalance.
Features
• Replicates heating characteristics of machines
• Pickup may be set as low as 1% negative sequence
• Unaffected by ±5 Hz frequency changes
• Output contacts for alarm, trip, and initiating other
devices
• External panel meter to display negative sequence
current level
BE1-47N Negative Sequence Voltage
Relay
(Request bulletin UDK)
Application
Provides protection against reverse phase sequence,
unbalance, or open phase.
Features
• Pickup may be set as low as 2% negative sequence
• Unaffected by ±5 Hz frequency changes
• Inverse, definite, and instantaneous timing options
• Independent overvoltage and undervoltage elements
BE1-50 Instantaneous Overcurrent
Relay
(Request bulletin UBC)
Application
Provides high speed protection for phase and/or
ground faults.
Features
• Setting ranges cover 0.25 to 32 amps
• Single-phase, three-phase, two-phase with neutral,
or three-phase with neutral configurations