Advanced Power Control and Monitoring
5200 Power Manager XP
Two Power Managers, one each dedicated to utility and onsite power sources, provide protective relay functions for reliable parallel operation of the sources in the 7000 Series Soft Load Power Transfer Switch. The power managers include digital inputs and outputs (Device 85).

In addition to directional power, a directional overcurrent device provides the most reliable protection against undesirable back-feeding of onsite power to the utility grid.
Utility Source
Power Manager

Device 27/59
Under and over voltage

Device 32
Directional power

Device 46
Negative sequence overcurrent

Device 47
Negative sequence voltage

Device 67
Directional overcurrent

Device 81
Under and over frequency

Device 86
Lockout relay

 Utility Source
Power Manager

Device 27/59
Under and over voltage

Device 32
Directional power

Device 40
Loss of excitation (excess VARs)

Device 81
Under and over frequency

Device 86
Lockout relay
© Copyright 2001-2008 ASCO Power Technologies, LP
Florham Park, NJ 07932