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-CDS220 Current Differential System

Product Bulletin	Instruction Manual	Protocol Manuals	Product Software	Application Guides	Guideform Specifications
Bulletin UHP (includes stylechart)	BE1-CDS220 Manual	DNP3 manual	BESTCOMS	Generator Protection	BE1-CDS220 Specs in Word
	BE1-CDS220 Manual by sections	Modbus manual	BESTwave	Transformer Protection	BE1-CDS220 Specs in PDF
			BESTprint
Click here for Application Notes and Technical Papers and other Resources

Multifunction numerical relays that provide percentage restrained differential protection along with overcurrent, breaker failure, control, metering, monitoring, and alarm functions.

Standard features include:

Includes harmonic restraint, as well as phase shift and tap compensation, for use in transformer applications.

Available in two case configurations.

Device Functions

	50

	62

	51

	87


	DNP Option


	Modbus RTU Option

Includes frequency compensation for high accuracy in generator and motor differential applications
BESTlogic programmable logic software provides the user with complete flexibility in configuring a protection and control system.
Available in 3 phase, 2 restraint
BESTCOMS GUI software available to aid in setup.

Application Notes and Technical Papers and other Resources

Application Notes
- Application Note PC-CDS01 - An explanation of a unique aid included in the BE1-CDS220 for identifying incorrect differential connections or settings before an incorrect operation occurs
- Application Note PC-COM01 - Basic instructions for setting up HyperTerminal and Terminal
- 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
- A Review of System Grounding Methods and Zero Sequence Current Sources
- Using Iop Characteristics to Troubleshoot Transformer Differential Relay Misoperation
- Reliability Considerations of Multifunction Protection
- Ground Differential Protection: Revisited
- Breaker Monitoring with Numerical Relay
- Commissioning Numerical Relays
- Unconventional Connections and How to Get It Right
- Predicting Current Differential Relay Tripping and Targeting when Testing at Final Settings

Other Resources
- BE1-CDS DNP Certification Report
- BNS Time Current Characteristic Spreadsheet
- Electric Calculations Spreadsheet
- Transformer Differential Calculations