SECTION 1 • GENERAL INFORMATION
TABLE OF CONTENTS
SECTION 1 • GENERAL INFORMATION ................................................................................................ 1-1
General .................................................................................................................................................. 1-1
Features ................................................................................................................................................. 1-1
Input and Output Functions ................................................................................................................ 1-1
Protection and Control Functions ....................................................................................................... 1-2
Metering.............................................................................................................................................. 1-3
Reporting and Alarm Functions .......................................................................................................... 1-3
BESTlogic Programmable Logic ........................................................................................................ 1-4
Security............................................................................................................................................... 1-4
Human-Machine Interface .................................................................................................................. 1-4
Communication .................................................................................................................................. 1-4
BESTCOMS™ Software ..................................................................................................................... 1-5
Primary Applications .............................................................................................................................. 1-5
Model and Style Number Description .................................................................................................... 1-6
General ............................................................................................................................................... 1-6
Sample Style Number ........................................................................................................................ 1-6
Operational Specifications ..................................................................................................................... 1-7
Metered Current Values and Accuracy .............................................................................................. 1-7
Calculated Values and Accuracy ....................................................................................................... 1-7
50T Instantaneous Overcurrent Protection ........................................................................................ 1-7
50BF Breaker Failure Protection ........................................................................................................ 1-8
51 Time Overcurrent Protection ......................................................................................................... 1-8
62 Logic Timers ∗ ............................................................................................................................... 1-8
79 Recloser Protection ....................................................................................................................... 1-8
Automatic Setting Group Characteristics ........................................................................................... 1-8
General Specifications ........................................................................................................................... 1-9
AC Current Inputs ............................................................................................................................... 1-9
Analog to Digital Converter ................................................................................................................ 1-9
Power Supply ..................................................................................................................................... 1-9
Output Contacts ................................................................................................................................. 1-9
Contact-Sensing Inputs .................................................................................................................... 1-10
Contact Inputs Recognition Time ..................................................................................................... 1-10
IRIG .................................................................................................................................................. 1-10
Real-Time Clock ............................................................................................................................... 1-11
Communication Ports ....................................................................................................................... 1-11
Display .............................................................................................................................................. 1-11
Isolation ............................................................................................................................................ 1-11
Surge Withstand Capability .............................................................................................................. 1-11
Radio Frequency Interference (RFI) ................................................................................................ 1-11
Electrostatic Discharge (ESD) .......................................................................................................... 1-11
Shock................................................................................................................................................ 1-11
Vibration ........................................................................................................................................... 1-11
Environment ..................................................................................................................................... 1-12
CE Qualified ..................................................................................................................................... 1-12
UL Recognition ................................................................................................................................. 1-12
C.S.A. Certification ........................................................................................................................... 1-12
GOST-R Certification ....................................................................................................................... 1-12
DNP Certification .............................................................................................................................. 1-12
Physical ............................................................................................................................................ 1-12
Figures
Figure 1-1. Style Number Identification Chart ........................................................................................... 1-6
9289900990 Rev R
BE1-851 General Information
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