BE1 Numerical Protection Systems

BE1-GPS100 \|	BE1-1051 \|	BE1-951 \|	BE1-851 \| BE1-851E
BE1-CDS240 \|	BE1-CDS220 \|	BE1-IPS100 \|	next

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.

BE1-851 Overcurrent Protection System

Product Bulletin	Instruction Manual	Protocol Manuals	Product Software	Application Guides	Guideform Specifications
Bulletin UHM (includes stylechart)	BE1-851 Manual	DNP3 manual	BESTCOMS	Generator Protection	BE1-851 Specs in Word
	BE1-851 Manual by sections	Modbus Manual	BESTWave	Transformer Protection	BE1-851 Specs in PDF
			BESTprint
Click here for Application Notes and Technical Papers and other Resources

Multifunction, numerical relay that provides three phase and ground or three phase, ground, and negative sequence overcurrent protection with four shot recloser, breaker failure, breaker monitoring, control, and metering functions in an integrated system.

Available in three case configurations

Device Functions

	50

	BF

	51

	79


	DNP Option


	ASCII Option


	Modbus Option

Standard features include:

Allows the user to select the optimal response characteristic separately for phase and ground elements.
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.
Available in three case configurations to fit any installation requirements. All three are fully drawout and one includes test paddle for testing in case.
BESTCOMS GUI software available to aid in setup.

Application Notes and Technical Papers and other Resources

Application Notes
- 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
- 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
- BE1-851 DNP Certification Report
- BNS Time Current Characteristic Spreadsheet
- Electric Calculations Spreadsheet