DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
· Apply appropriate personal protective equip ment (PPE) and follow safe electrical work practices.
See NFPA 70E.
· This equipment must only be installe d and serviced by qualified electrica l personnel.
· Turn off all power supplying this equipment before working o n or inside equipment.
· Always use a properly rated voltage sensing device to conf irm power is off.
· Replace all devices, doors and covers b efore turning on power to this equipment.
Failure to follow these inst ructions will result in d eath or serious injury.
CAUTION

LOSS OF BRANCH CIRCUIT POWER AND SURGE PROTECTION

In the event that the surge protective elements of the SPD have been damaged (i.e. excessive surge
energy, power system anomaly, etc.), the surge protective elements can lose their ability to block
power system voltage and attempt to draw excessive current from the line. This SPD is equipped with
overcurrent and overtemperature protection that will automatically disconnect the surge protective
elements from the mains should the surge protective elements be dam aged.
The effects of damaged surge protective elements and the subsequ ent operation of the automatic
overcurrent and overtemperature protection must be considered when applying a SPD, particularly
when critical loads requiring continuity of power or co ntinuity of surge protection are present on the
power system. The following items should be considered when applyi ng a SPD:
· Tripping of the branch circuit breaker feeding the SPD can occur when the surge protective
elements are damaged. Do not connect the SPD to a branch circuit feeding a l oad requiring
continuity of power (i.e. central computer or control systems, safety-critical equipme nt, critical
processes or systems, etc.) unless the branch circuit breaker trip characteristic has b een
coordinated with the overcurrent protection inside the SPD.
· Periodic inspection of the state of the status indicator lights on the SPD should be made as par t of
the preventive maintenance schedule. The SPD should be promptly ser viced when an alarm
state exists.
· For unmanned, inaccessible, or critical installation s, the dry contacts should be used to signal an
alarm state to the central supervisory system.
· In addition to the preceding items, the use of multiple SPD’s to achieve redundancy should be
considered for critical applications.
Failure to follow these inst ructions can result in l oss of power or loss of surge protec tion
that can cause injur y or equipment damage.
2
WARNINGS
APC MODULAR PANEL PRODUCTS Surge Protective Device (SPD)