BE1-59N | BE1-59NC | BE1-60 | BE1-64F | BE1-67N | BE1-79A | BE1-79M | BE1-81 O/U | BE1-87B | BE1-87G | BE1-87T | previous | next
 

BE1-59N Ground Fault Overvoltage Relay

Provides sensitive ground fault protection for ungrounded or high resistance grounded systems, generators, or capacitors.
 

• Overvoltage element tuned to reject harmonics
• Pickup down to 0.1 volts
• Withstands full rated voltage continuously
• Third harmonic undervoltage element for 100% stator protection
  (optional)
• Instantaneous, definite, or inverse time characteristics
• Drawout construction
   

Download Bulletin UBG for more information or download the instruction manual.

BE1-59NC Capacitor Neutral Overvoltage Relay

Provides sensitive protection for capacitor banks.

• Helps avoid cascading capacitor failures
• Sensing circuit rejects harmonics and noise to achieve higher sensitivity to 50/60 Hz neutral voltage
• Includes an early warning alarm output on minor unbalances such as a blown fuse
• Can be set to trip when voltage across any capacitor exceeds 110% of nominal
• Drawout construction

Download Bulletin UHF for more information or download the instruction manual.

BE1-60 Voltage Balance Relay

Detects voltage imbalances on relay/control circuits.

• Wide range adjustments (5% to 50%)
• Six input sensing types to match various system configurations
• Maximum trip time of 100 milliseconds
• Drawout construction

Download Bulletin UBS for more information or download the instruction manual.
 

BE1-64F Ground Fault Relay

Download Bulletin UHU for more information or download the instruction manual.
 

BE1-67N Ground Directional Overcurrent Relay

Microprocessor directional overcurrent relay for ground faults.

• Twelve field selectable time-current curves
• Directional and/or non-directional instantaneous (optional)
• Directional element polarized by zero sequence current, zero sequence voltage, or phasor sum of zero sequence quantities

Download Bulletin UDR for more information or download the instruction manual.

Download a time current characteristic spreadsheet on the BE1-67.

BE1-79A Retrofit Reclosing Relay
Patent Pending

Installs in existing ACR and NLR cases without panel or wiring changes.

• Single BE1-79A configuration replaces multiple ACR and NLR types
• Easy setup with front panel communications interface
• Drawout construction

For more information on the application options the BE1-79A can provide,
see Application Note PC-79A01.

Download Bulletin UHN for more information or download the instruction manual.
 

BE1-79M Multiple Shot Reclosing Relay

Provides automatic reclosing of tripped circuit breakers in power transmission and distribution systems

• Contact selectable reclosing sequences are programmable for up to 4 reclosure attempts.
• Ability to resume reclosing sequence if control power is interrupted.
• Individually adjustable time-delayed reclosing attempts. Separate high speed “Pilot” reclose input and output are available for transmission reclosing applications.
• Drawout construction

Download Bulletin UDL for more information or download the instruction manual.

BE1-81 O/U Digital Frequency Relay

Protects the system during over and/or underfrequency conditions.
 

• 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
• Inverse or definite time delay characteristics
• Supplied in S1 (drawout construction) or M1 case depending on option

Download Bulletin UBR for more information or download the instruction manual.

BE1-87B Bus Differential Relay

Economical high speed protection in a conventional package for all high impedance differential applications.

• High Impedance Differential provides optimum speed and selectivity
• Single phase or three phase configurations allow space and cost benefits
• Fully drawout, testable-in-case design, compatible with existing panel mount configurations.
• CT Circuit Diagnostic function and Steady State Unbalance alarm verify external wiring and prevent misoperation.

• Intentional 20msec delay timer can be inserted in the trip logic to aid in coordination when bus is tapped with high speed fuses
• Supplied in S1 (drawout construction) or M1 case depending on option

Download Bulletin UHC for more information or download the instruction manual.

BE1-87G Variable Percentage Differential Relay

Protects rotating machines and reactors against internal faults.

• Single-phase and three-phase units available
• Sensitivity is adjustable from 0.1 to 1.6 amps
• Variable percentage restraint characteristics
• Drawout construction

Download Bulletin UBK for more information or download the instruction manual.

BE1-87T Transformer Differential Relay

Primary protection against internal faults in power transformers.
 

• Single phase sensing with up to five, single phase inputs
• Three phase sensing with up to three sets of inputs
• Provides precision ratio matching with 0.1 amp steps
• Second and fifth harmonic restraint for overexcitation and inrush security
• Phase shift compensation eliminates need for delta or auxiliary CTS

Download Bulletin UHA for more information or download the updated instruction manual.

Download a settings spreadsheet on the BE1-87T or the Transformer Differential Calculations Spreadsheet and Predicting Current Differential Relay Tripping and Targeting when Testing at Final Settings Tech Paper.