7-8
BE1-25A Relay Differences
9146600990 Rev M
Figure 7-5. Module B3
Figure 7-6. Module B5
BREAKER TIME EQUALIZATION MODULES (OPTIONS B3 AND B5)
Beginning with serial number 300, options B3 and B5 were discontinued. For reference purposes, portions
of an earlier edition of this manual that covered these discontinued options are reprinted in the following
paragraphs.
Description and Application
Two breaker time equalization options (Figures 7-4 and 7-5) provide individually adjustable time delays that
may be adjusted to match the characteristic closing times of the controlled breakers. Option B3 provides
three additional time delays, while option B5 provides five additional delays (i.e., additional to the one that
is present without any option).
These options are not currently offered because their function was incorporated in the MCU synchronizer
module (beginning with chassis serial number 300).
Functional Description
(Refer to Figures 7-6 and 7-7.) A remote selector switch is used to select and enable the Transmission Gate
to be used. All gates are inhibited except the one selected.
The signal from the Breaker Time Timer (of the Synchronizer Module) is delivered to the front panel TIME
SET controls, and then to the Transmission Gates.
The Advance Angle signal (from the Breaker Time Compensation circuit of the Synchronizer Module) is
delivered to the front panel TIME SET controls, and then to the Transmission Gates. The Transmission
Gate output of the selected breaker is then used to determine when the Breaker Close signal is generated.
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