Post Glover PULSERPLUS PRO - High 3 rd Harmonics

PULSERPLUS PRO™ HIGH RESISTANCE GROUNDING SYSTEM
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
4750 Olympic Blvd. • Erlanger, KY 41018 • USA
Phone: 800-537-6144 / 859-283-0778 • Fax: 859-283-2978
www.postglover.com
Serving the Electrical Industry Since 1892
PGR Document #HG111-06© 2006 Post Glover Resistors, Inc.
PULSERPLUS PRO™ HIGH RESISTANCE GROUNDING SYSTEM
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
4750 Olympic Blvd. • Erlanger, KY 41018 • USA
Phone: 800-537-6144 / 859-283-0778 • Fax: 859-283-2978
www.postglover.com
Serving the Electrical Industry Since 1892
© 2006 Post Glover Resistors, Inc. 5
The Under-Voltage / Under-Current feature for 3
rd
Harmonics can also be used for detecting Ground faults near
theneutralofawyeconnectedgenerator.DuringaGroundFaultneartheneutral,thevoltagemaynotbesufcient
to drive enough current for Ground Fault detection. However, the typical 3
rd
harmonic caused by fractional pitched
generators will be shorted and the value will go to 0.
To prevent nuisance indications, the adjustable time delay setting can be manipulated via the operator’s panel. The
PulserPlus Pro™ controller does know the difference between this condition and a Loss of Ground condition, so
only the green NORMAL indicating light will turn off and the SYSTEM NORMAL auxiliary form-C contacts change
state.
2.4 High 3
rd
Harmonics
High 3
rd
harmonics are also sensed by the PulserPlus Pro™ controller. An upper limit is set by the user for
detection of current or voltage across the resistor. After a time delay expires; the amber THIRD HARMONIC
indicator light will illuminate, the NORMAL indicator light will turn off, and an alarm horn will sound. Upon detection,
the SYSTEM NORMAL and THIRD HARMONIC auxiliary form-C contacts change state.
The alarm horn can be silenced by pressing the ALARM SILENCE button while searching for the cause of the third
harmonic fault. The amber THIRD HARMONIC light will remain illuminated until the condition is removed and the
system is manually reset by pressing the RESET and ALARM SILENCE buttons. Optionally, the PulserPlus Pro™
canbeconguredforauto-reset.
A Summary of Events is shown on the following page.