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.

BE1-951 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	BE1-951 Specs in Word
	BE1-951 Manual by sections	Modbus Manual	BESTwave	Transformer Protection	BE1-951 Specs in PDF
			BESTprint
Click here for Application Notes and Technical Papers and other Resources

Multifunction numerical relay that 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, fault reporting, and metering functions, all in an integrated system.

Available in H1 and S1 cases

Device Functions


	24


	25 Option


	27

	50
	60

	BF


	32

	51

	62

	79


		47

		59

		67

	81


	DNP Option


	ASCII Option


	Modbus Option

Standard features include:

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-COM01 - Basic instructions for setting up HyperTerminal and Terminal
- Application Note PC-95101 - Ideas to implement intertripping with directional overcurrent protection schemes
BESTCOMS file for PC-95101
- Application Note PC-95102 - An example of how to detect high side fuse operations on a delta-wye transformer
- Application Note PC-59N01 - A discussion of two methods to determine the zero sequence component of the line voltage and tripping with the 59N function
- Mathcad file for PC-59N01
- 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-2502 - Understanding and applying the sync check (25) phase angle compensation in Basler numeric relays.
- Application Note PC-ArcFlash - Arc Flash Hazard Mitigation Through Relaying

Technical Papers
- Load Shedding for Utility and Industrial Power System Reliability
- Voltage Restrained Time Overcurrent Relay Principles, Coordination, and Dynamic Testing Considerations
MathCad simulation for Voltage Restrained paper
- Reliability Considerations of Multifunction Protection
- Myths of Protecting the Distributed Resource To Electric Power System Interconnection
- Distributive Generation and Interconnection: Protection, Monitoring, and Interconnection Opportunities
- A Practical Guide for Detecting Single-Phasing on a Three-Phase Power System
MathCad simulation for Practical Guide paper
- 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
- Effects of Distributed Generation on Utility Protection Schemes

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