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BE1 Numerical Protection Systems
 

BE1-11f   

BE1-11i  

BE1-11g  

NEW! BE1-11m

BE1-GPS100

BE1-IPS100

BE1-1051

BE1-951

BE1-851

BE1-851E

BE1-700C

BE1-700V

BE1-CDS240

BE1-CDS220

 

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BE1 Numerical Protection Systems are available in rack mount or retrofit friendly packages for any application. Their BESTlogic programmable logic provides the user with flexibility, while common protocols aid integration. Click here to see communications capabilities for the entire line.

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BE1-951
Multifunction Protection System
 

Product Bulletin

Instruction Manual

Protocol Manuals

Product Software

Application Guides

Guideform Specifications

Bulletin UHR (includes stylechart)

BE1-951 Manual

DNP3 Manual

BESTCOMS

Generator Protection

MicrosoftWorddoc BE1-951 Specs

 

 

Modbus Manual

BESTWAVEPlus

Transformer Protection

AdobeReaderlogo BE1-951 Specs

 

 

 

BESTprint

 

 

Click here for Application Notes and Technical Papers and other Resources

 

The BE1-951 multifunction numerical relay provides three phase, ground, and negative sequence directional or non-directional overcurrent protection with four shot recloser, forward or reverse power protection, breaker failure, over/underfrequency, over/undervoltage and overexcitation protection, sync check, breaker monitoring and control, sequential events and fault reporting, and metering functions, all in a programmable integrated system.

BE1-951
Available in two fully drawout case configurations.
Protective Relays
Application Table
Application Engineers
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Device Functions
 

  24 - Volts per Hertz   25 - Sync-Check   27 - Undervoltage
           
32 - Directional Power 47 - Phase Sequence 50 - Instantaneous Overcurrent
           
51 - AC Time Overcurrent 59 - Overvoltage 60 - Voltage Balance
           
62 - Time Delay 67 - AC Directional Overcurrent 79 - AC Reclosing
           
81 - Frequency Relay BF - Breaker Failure  
           
Modbus RTU Option
   
  Modbus TCP Option
   
  DNP Option
   
  BESTCOMS Ethernet
   
 

BESTNet Option


Standard features include:

  • NEW! Ethernet communications options
  • Metering functions include Watt, VAR, Power Factor, WH, VARH, and Frequency with forward and reverse Watt and VAR demand alarms.
  • BESTlogic provides the user with complete flexibility in configuring a protection and control system. User programmable variable and switch names make these relays completely self documenting.
  • Programmable LCD display allows the relay to replace local indication and control functions, such as panel metering, alarm annunciation, and control switches.
  • Three independent communication ports with protocol support allows integration with distributed control systems.
  • Provides optional separate ground current input and/or separate sync check voltage input for those applications where this is required.
  • Includes frequency tracking and voltage restrained overcurrent for generator backup and cogeneration applications.
  • BESTCOMS GUI software available to aid in setup.

Available in two case configurations to fit any installation requirements. Both (H1 and S1) are fully drawout, and the S1 includes a removable test paddle facilitating in case testing
 

Application Notes and Technical Papers and other Resources

Application Notes
- Application Note PC-95101 - Implement intertripping with directional overcurrent protection schemes with BESTLogic in the BE1-951
- Application Note PC-95102 - Detect high side fuse operations on a delta-wye transformer with a multifunction numerical relay, such as the BE1-951. A downloadable BESTCOMS™ file shows the settings for this scheme..
- Application Note PC-COM01 - Basic instructions for setting up HyperTerminal and Terminal
- Application Note PC-51Q01 - Consideration on applying negative sequence overcurrent elements
- Application Note PC_RTF Compare - Instructions for an easy way to quickly and accurately compare two numeric relay settings files using BESTCOMS and Microsoft® Word.
- Application Note PC-ArcFlash - Arc Flash Hazard Mitigation Through Relaying

Technical Papers
- Protective Relaying Methods for Reducing Arc Flash Energy
- A Review of Negative Sequence Current
- A Practical Guide for Detecting Single-Phasing on a Three-Phase Power System
- Load Shedding for Utility and Industrial Power System Reliability
- Reliability Considerations of Multifunction Protection
- Protective Relaying When Distributed Generation is Added to Your Circuit
- Intertie Requirements for DGs Connected to Radial Distribution Feeders
- Breaker Monitoring with Numerical Relay
- Commissioning Numerical Relays

Other Resources
- BE1-951 DNP Certification Report
- BNS Time Current Characteristic Spreadsheet
- Electric Calculations Spreadsheet

ISO Certificate Link


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