15
CURRENT TECHNOLOGY
®
PX3
TM
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
➤
If your PX3 has M1 Standard Monitoring
(see Figure 11)
:
Verify that only the green indicating lights are illuminated and that there are no
red lights illuminated . Green lights indicate a normal condition for each phase .
Orange lights indicate protection of 40–75% and Red lights indicate protection
of <40% . Three-phase units have three (3) green indicating lights labeled “A”,
“B”, and “C” . Split-phase units should only have lights “A” and “C” illuminated .
See table below for LED status indication .
The M1 Standard Monitoring is equipped with a dual set of Form “C” contacts
(see Figure 12)
. The relay containing the contacts is in the “alarm condition”
or normally closed when the power is off to the unit, when the unit is
encountering loss of power to one or more phases, or the PX3 is encountering
more than 40% loss of capacity due to internal fuse operation . Test the
operation of the Form “C” contacts by de-energizing the PX3 and checking
the state of the contacts with a continuity tester or observing the effect of the
contacts on the user provided remote alarm circuits .
➤
If your PX3 has the M2 Option
(See Figure 12)
:
The M2 option is equipped with a surge counter . The number of surges
detected by the counter is displayed on a 6-digit LCD display on the front
of the PX3 door . The surge counter will also increment each time power is
applied to the unit after being in the “off” state . The counter can be reset by
pressing the button on the front of the counter .
The M1 and M2 Standard Monitoring also contain an audible alarm that
should not operate under normal conditions . To silence audible alarm,
press ALARM SILENCE button on display .
➤
If your PX3 is equipped with the MasterMind
®
Advanced Monitoring
Option
(see Figure 13)
Please refer to the MasterMind
®
manual for Specifications and Operation .
Verify Proper Operation
Figure 11: PX3 with M1 Standard
Monitoring.
Figure 12: PX3 with M2 Standard
Monitoring with Surge Counter.
Figure 13: PX3 with MasterMind
®
Advanced Monitoring
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