User manual

ePower Power Distribution Unit User Manual, Revision 1.1 55
6 Configuring Cyber Breaker
the Virtual Circuit Breaker
In addition to the optional hardware circuit breakers for each bank of
outlets, the ePower PDU provides an adjustable Virtual Circuit Breaker
for each outlet, known as a Cyber Breaker
®
the Virtual Circuit Breaker™
(referred to as “Virtual Circuit Breaker” or “VCB” within in this user
manual and the Web interface). Under certain conditions, a Virtual Circuit
Breaker provides faster response times than a hardware circuit breaker
by way of a user-definable trip curve (refer to Example 1 and Example 2).
NOTE UL 489A (10
th
edition) defines an “adjustable circuit breaker” as
“a circuit breaker that has adjustable time/current tripping characteristics.
These characteristics may include (a) inverse-time (such as continuous
current, long time, and/or short time); (b) instantaneous; and/or
(c) ground-fault.”