Up to two IT-D Isolation Transducers can be used with each BE-11d DC

Power Protection System. An IT-D transducer electrically isolates the

BE1-11d from power parameters monitored by the system.

Each IT-D can monitor two parameters. Parameters monitored by the

IT-D include DC system voltages and current (measured through a

metering shunt). The output of each IT-D channel is a pulsed digital signal

with a frequency that is proportional to the monitored input signal.

These fiber optic channel outputs are provided to the BE1-11d DC Power

Protection System.

Two 30-foot fiber optic cables with fiber optic connectors are supplied with

every IT-D module ordered.

The BE1-11d DC Power Protection System provides flexible, reliable, and

economical dc power protection, control, monitoring, and measurement

functions. The capabilities of the BE1-11d make it well suited to provide

comprehensive dc power protection. The BE1-11d offers dc overcurrent,

over/undervoltage, rate of rise, power, and thermal overload protection

functions as well as breaker reclosing and RTD (Resistance Temperature

Detector) inputs with remote module. It offers breaker and trip-circuit

monitoring, and oscillography and sequential events recording.

Control features include virtual selector switches, circuit breaker control,

virtual lockout, and variable-mode timers.

System metering and status information are available at the BE1-11d front

panel and through the BE1-11d communication ports.