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BE1-25 Glossary
Live Line/Live Bus
Preset voltage reference levels determine when the bus and line are considered live.
Magnetically latched indicator
When a target is operated, the display is held in place by a magnet until the target reset lever is actuated.
Mode switches
Two switches are located on the Voltage Monitor Card, with two positions for selecting Live/Dead
(NORMAL Mode) or Live/Not-Overvoltage (NOT OV Mode) references for bus and line. Mode Switch No.
1 refers to bus voltage reference levels, and Mode Switch No. 2 refers to line voltage reference levels.
Non-isolated contact sensing
With this configuration of the 52b input, the BE1-25 monitors the presence of dc voltage at the input due to
the closure of a contact. The eighth position of the Style Number selects the contact sensing; option 1-4 is
non-isolated contact sensing.
Option 1
Relay option 1 provides either a non-isolated contact sensing input (1-4) or isolated contact sensing input
(1-5). The eighth position of the Style Number defines the input type.
Option 2
Relay option 2 provides sync-check variations for line and bus voltage monitoring and/or voltage
difference monitor selections to meet customer needs for a particular system scheme. The ninth position
of the Style Number defines the voltage monitor type.
Option 3
Relay option 3 provides for various auxiliary outputs or for a status output. The tenth position of the Style
Number defines the output type:
0)
None
1)
Sync-Check Auxiliary Output NO Relay
2)
Sync-Check Auxiliary Output NC Relay
3)
Sync-Check Auxiliary Output SPDT Relay
6)
Power Supply Status Output
Note that if the Expandable Window is selected (second position of the Style Number is 9), an Auxiliary or
Status Output is not available (a zero must be in the tenth position of the Style Number).
Option E or F
An E in the third position of the Style Number designates a Sync-Check NO output relay; an F designates
a Sync-Check NO output relay with Push-to-Energize Output.
Option G or H
A G in the third position of the Style Number designates a Sync-Check NO output relay and Voltage
Monitor SPDT output relay; an H designates a Sync-Check NO relay and Voltage Monitor SPDT output
relay with Push-to-Energize Output for both relays. These options are not available if Voltage Monitor
Option 2 is N or T.
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