User's Manual

SmartBypass™
The SmartBypass™ builds upon the proven success of the bypass systems used in the PowerLine Guardian® and Power
Guardian™ 390 products. The SmartBypass provides rapid protection during fault conditions for SmartValve™ Models
that do not have integrated bypass capability. Under normal operation, it enables operators to manually bypass a
SmartValve, or it can switch it in series with the transmission line. When in series with the line, a SmartValve can inject
its controllable reactance for power flow control. The SmartBypass can operate at line currents of thousands of amps
during normal bypass operation and withstand different fault current levels depending on the model. The SmartBypass
models are differentiated by continuous current rating and maximum fault current rating. For example, the SmartBypass
4000-63 is rated for continuous line currents up to 4000 A RMS and fault currents of up to 63 kA RMS for 1 second. The
SmartBypass provides telemetry for itself and associated SmartValves when operating in monitoring mode or injection
mode
(1)
.
The SmartBypass operates in conjunction with a separate enclosure of filter components called the Bypass Filter.
Deployment of the SmartBypass requires the Bypass Filter, hence the specifications for it are also included below. The
Bypass Filter contains filter components that bypass transmission line traveling waves so they do not enter the main
SmartBypass enclosure. Thus the Bypass Filter provides immunity to typical transmission line transients such as line
switching and lightning surges that generate voltage and current traveling waves that propagate from one end of the
line to the other. The same Bypass Filter is used for all SmartBypass Model variants as shown in the specification table
below. The Bypass Filter connects to the top two NEMA pads on the SmartBypass. The physical details of the connection
methods will depend on the deployment type.
SmartBypass 2000-XX Dimensions
User Manual