Basler Electric BE1-50/51B-244 - Manual (Page 9)

9252000793 Rev C BE1-50/51B-244 General Information i
SECTION 1 • GENERAL INFORMATION
TABLE OF CONTENTS
SECTION 1 • GENERAL INFORMATION ................................................................................................ 1-1
Introduction ............................................................................................................................................ 1-1
Features ................................................................................................................................................. 1-1
Advantages ........................................................................................................................................ 1-2
Specifications ......................................................................................................................................... 1-2
Time Overcurrent (51) Element .......................................................................................................... 1-2
Instantaneous Overcurrent A (50-A) Element .................................................................................... 1-2
Instantaneous Overcurrent B (50-B) Element .................................................................................... 1-3
Current Sensing Input ........................................................................................................................ 1-3
Frequency Response ......................................................................................................................... 1-4
Transient Response ........................................................................................................................... 1-4
Harmonic Rejection ............................................................................................................................ 1-4
Target Indicators ................................................................................................................................ 1-5
Output Contacts ................................................................................................................................. 1-5
Type Tests .......................................................................................................................................... 1-5
Environment ....................................................................................................................................... 1-5
Agency Recognition ........................................................................................................................... 1-5
Physical .............................................................................................................................................. 1-5
Figures
Figure 1-1. Current Sensing Input Derating Curve (BE1-50/51B-244) ...................................................... 1-3
Figure 1-2. Current Sensing Input Burden (BE1-50/51B-244) .................................................................. 1-4
Figure 1-3. Harmonic Rejection ................................................................................................................. 1-4
Tables
Table 1-1. Westinghouse Relays Suitable for Direct Replacement .......................................................... 1-1