9328900990 Rev L BE1-951 Reporting and Alarm Functions 6-23
Figure 6-10. Trip Circuit Voltage and Continuity Monitor
In
Figure 6-11, a 62x auxiliary relay is shown. In this case, the impedance of the 62x coil is small
compared to the impedance of the TCM circuit so the TCM optical isolator is always on and the TCM is
always at logic 1. This prevents the TCM logic from working even if the trip coil is open. To prevent this
problem, a diode was added as shown in
Figure 6-11 to isolate the TCM circuit from the effects of 62X.
CAUTION
Applications that place other device inputs in parallel with the breaker trip coil
may not perform as desired. The connection of other devices in parallel with the
trip coil causes a voltage divider to occur when the breaker or trip circuit is open.
This may cause false tripping of the other devices and prevent the BE1-951 trip
circuit monitor from reliably detecting an open circuit. Contact Basler Electric for
advice on this application.
The circuit monitor sensing element has the same rating as the power supply
voltage. If the trip circuit voltage is significantly greater than the power supply
voltage (for example, when using a capacitor trip device), the user should
program the BE1-951 to use one of the other output relays for tripping. In this
situation, the trip circuit monitor function will not be available.
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