Basler BE1-67N, Instruction Manual

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9190700990 Rev F BE1-67N Functional Description i
SECTION 3
•
FUNCTIONAL DESCRIPTION
TABLE OF CONTENTS
SECTION 3
•
FUNCTIONAL DESCRIPTION ........................................................................................... 3-1
INTRODUCTION.................................................................................................................................... 3-1
CURRENT SENSING ............................................................................................................................ 3-1
VOLTAGE SENSING............................................................................................................................. 3-2
DIRECTIONAL ELEMENT..................................................................................................................... 3-2
Zero Sequence Current Polarization.................................................................................................. 3-2
Zero Sequence Voltage Polarization.................................................................................................. 3-3
Dual Zero Sequence Current and Voltage Polarization ..................................................................... 3-4
OVERCURRENT ELEMENTS............................................................................................................... 3-4
Time Overcurrent Element ................................................................................................................. 3-4
Instantaneous Overcurrent Elements................................................................................................. 3-5
Operate Time...................................................................................................................................... 3-5
OUTPUT CONTACTS ........................................................................................................................... 3-5
Relay Failure Output Contact ............................................................................................................. 3-5
Tripping Output Contacts ................................................................................................................... 3-5
Auxiliary Output Contacts................................................................................................................... 3-5
PUSH-TO-ENERGIZE OUTPUT SWITCHES ....................................................................................... 3-6
POWER SUPPLY .................................................................................................................................. 3-6
TARGETS .............................................................................................................................................. 3-6
Internally Operated Targets................................................................................................................ 3-6
Current Operated Targets .................................................................................................................. 3-6
Figures
Figure 3-1. Function Block Diagram .......................................................................................................... 3-1
Figure 3-2. Zero Sequence Current Polarizing Phase Relationship ......................................................... 3-3
Figure 3-3. Zero Sequence Voltage Polarizing Phase Relationship (0
°
Characteristic Angle)................. 3-3
Figure 3-4. Zero Sequence Voltage Polarizing Phase Relationship (60
°
Characteristic Angle)............... 3-4
Tables
Table 3-1. I
op
Current Sensing Input Connections..................................................................................... 3-1
Table 3-2. Sensing Input Range and Setting for 1 Aac Secondary........................................................... 3-2
Table 3-3. Sensing Input Range and Setting for 5 Aac Secondary........................................................... 3-2
Table 3-4. Selection Considerations for Characteristic Curves................................................................. 3-4
Table 3-5. Instantaneous Overcurrent Element Operating Times............................................................. 3-5