manual
4
Installation and Operation Manual
Precautions
At end-of-life conditions, Surge Protective Devices (SPDs) can lose their
ability to suppress power system voltage and attempt to draw excessive
current from the line. This SPD is equipped with overcurrent and
overtemperature components that will automatically disconnect the surge
suppression elements from the mains should the surge suppression
elements reach end of life. Tripping of the branch circuit breaker or fuse
feeding the SPD can occur. Mitigate the tripping of the branch circuit
breaker or fuse feeding the SPD by coordinating the surge suppression
elements with the branch circuits.
For the purposes of coordination, the SPD is equipped with overcurrent
components that will limit the per phase I
2
t, I
apparent
, I
p
, and I
th
values to
those listed in Table 1 when connected to a power system with a short-
circuit current rating not exceeding 200,000 A.
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe
electrical work practices. See NFPA 70E.
• This equipment must only be installed and serviced by qualified electri-
cal personnel.
• Turn off all power supplying this equipment before working on or inside
equipment.
• Always use a properly rated voltage sensing device to confirm power is off.
• Replace all devices, doors and covers before turning on power to this
equipment.
• This equipment must be effectively grounded per all applicable codes.
Use an equipment-grounding conductor to connect this equipment to
the power system ground.
Failure to follow these instructions will result in death or serious injury.
CAUTION
LOSS OF BRANCH CIRCUIT POWER / LOSS OF SURGE
SUPPRESSION
• Ensure that the branch circuit breaker or fuse trip characteristic has
been coordinated with the overcurrent protection inside the SPD
(See Table 1).
• Perform periodic inspection of the SPD status indicator lights as part of
the preventative maintenance schedule.
• Promptly service the SPD when an alarm state exists.
• Use dry contacts to signal an alarm state to the central supervisory sys-
tem for unmanned, inaccessible, or critical installations.
• Use multiple SPDs to achieve redundancy for critical applications.
Failure to follow these instructions can result in injury or
equipment damage.
Precautions