9137300990 Rev N
iii
Contents
Introduction ................................................................................................................................................. 1
Features .................................................................................................................................................... 1
Frequency Setpoints .............................................................................................................................. 1
Time Delays ........................................................................................................................................... 1
Undervoltage Inhibit ............................................................................................................................... 1
Targets ................................................................................................................................................... 1
Operation ................................................................................................................................................... 1
Style Number ............................................................................................................................................. 1
Controls and Indicators .............................................................................................................................. 3
Front Panel ................................................................................................................................................ 3
Circuit Board .............................................................................................................................................. 4
Multiplier Settings ................................................................................................................................... 4
Cycles/Seconds Settings ....................................................................................................................... 4
Functional Description ............................................................................................................................... 7
Input Signal ................................................................................................................................................ 7
Undervoltage Inhibit ................................................................................................................................... 7
Zero-Crossing Logic .................................................................................................................................. 7
Crystal Oscillator ....................................................................................................................................... 7
Period Clock Generator ............................................................................................................................. 7
Minimum Period Difference Logic ............................................................................................................. 7
Maximum Period Difference Logic ............................................................................................................ 9
Measured Frequency Converter ................................................................................................................ 9
Frequency Comparator Logic .................................................................................................................... 9
Definite Time Delay Logic.......................................................................................................................... 9
Time Delay Selection ........................................................................................................................... 10
Relay Outputs .......................................................................................................................................... 11
Auxiliary Relay Outputs ........................................................................................................................... 11
Power Supply .......................................................................................................................................... 11
Power Supply Status Output ................................................................................................................... 11
Target Indicators ...................................................................................................................................... 11
Internally Operated Targets ................................................................................................................. 11
Current Operated Targets .................................................................................................................... 11
Installation ................................................................................................................................................. 13
Operating Precautions ............................................................................................................................. 13
Mounting .................................................................................................................................................. 13
Connections ............................................................................................................................................. 33
Maintenance ............................................................................................................................................ 35
Storage .................................................................................................................................................... 35
Testing ........................................................................................................................................................ 37
Test Equipment ....................................................................................................................................... 37
Operational Test ...................................................................................................................................... 37
High and Low Frequency Pickup ......................................................................................................... 37
Frequency Selector Settings ................................................................................................................ 38
Definite Time Delay – Cycles ............................................................................................................... 39
Definite Time Delay – Seconds ........................................................................................................... 39
Undervoltage Inhibit ............................................................................................................................. 40
Setpoint 2, 3, and 4 Testing ................................................................................................................. 40
Specifications ............................................................................................................................................ 41
Sensing Input ....................................................................................................................................... 41
Operating Power Input ......................................................................................................................... 41
Relay Outputs ...................................................................................................................................... 41
Output Contacts ................................................................................................................................... 41
Target Indicators (Optional) ................................................................................................................. 41
BE1-81O/U
