Specifications

15
BE1-87G Variable Percentage
Differential Relay
(Request bulletin UBK)
Application
Provides high speed solid-state variable percentage
differential protection for generators, motors, and
shunt reactors.
Features
• Single-phase and three-phase units
• Sensitivity is adjustable from 0.1 to 1.6 Amps.
• Variable percentage restraint characteristic
• Current balancing reactors help improve CT
performance on external faults.
• High speed (20 milliseconds) operation
BE1-87T Transformer Differential Relay
(Request bulletin UHA)
Application
Used for primary protection against internal faults in
power transformers.
Features
• Single-phase sensing with up to five single-phase
inputs
• Three-phase sensing with up to three sets of inputs
• Provides precision ratio matching in 0.1 Amp steps
• Second and fifth harmonic restraint for overexcitation
and inrush security
• Phase shift compensation eliminates need for delta or
auxiliary CTs.
• Power supply status output
• Push-to-energize output switches
• Displays percent I
op
BE1-BPR Breaker Protection Relay
(Request bulletin UHG)
MPS Motor Protection Systems
(Request bulletin UPB for MPS200/210,
UPC for MPS100)
Application
Intended for use in any three-pole tripping, breaker
failure protection application.
Features
• Three-phase and neutral current inputs monitor
currents on power system and in protected circuit
breaker.
• 12 sample per cycle digital signal processing
measures RMS value of current flowing in circuit
breaker.
• Seven programmable inputs and five programmable
outputs with BESTlogic provides complete system
configuration flexibility.
• Unique timer margin diagnostics to monitor critical
margins after every operation
• Available in horizontal 19″ rack mount and vertical
panel mount case
• Onboard breaker diagnostics
Application
Intended for use in any three-phase, induction motor
protection application. Provides protection from
faults and abnormal operating conditions.
Features
• MPS100 provides complete overcurrent and thermal
overload protection for three-phase induction motors.
• The MPS200 adds three-phase voltage inputs to
provide voltage and power protection and metering
functions.
• The MPS210 adds integrated motor control functions.
• All MPS relays include an integrated LCD display for
setup and local indication.
• The MPS100 is available in a vertical fixed case. The
MPS2xx relays are available in either vertical or
horizontal fixed cases or a Basler M1 drawout case
with test paddle for current and voltage inputs.