Mersen Surge-Trap XP Series Installation Instructions

INSTALLATION INSTRUCTIONS
Surge-Trap
®
The STXP Series is a high quality, high energy surge
suppressor designed to protect equipment from
damaging transient overvoltages. The STXP Series
is parallel connected device. Proper installation is
important for maximize product performance. These
installation instructions do not replace national or
local electrical codes.
WARNING – Risk of Electric Shock
• Only qualified licensed electricians should install or service
SPDs
• SPDs should never be installed or serviced when energized
or during electrical storms
• Use appropriate safety precautions including Personal
Protection Equipment
• Failure to follow these instructions can result in death,
serious injury, and/or equipment damage
• When used in outdoor applications, customer must seal
the conduit nipple using watertight fittings (not included) to
ensure a watertight connection
• Read this manual in its entirety prior to installing
Compliance:
The STXP Series SPD fully complies with latest UL 1449
and NEC regulatory changes. There has been recent
®
emphasis on installation location, identified as types 1, 2, 3
or 4 locations. They are outlined below:
Type 1:
Installation on the line side or load side of the
service disconnect overcurrent device, and
may be used in Type 2 or Type 4 installations.
Examples: Surge arresters, lightning arresters,
meter hubs, metering cabinets, ran out of breaker
positions, etc.
Type 2: Downstream of service disconnect; probably will
connect via breaker. Examples: Switchboards,
power panels, panelboards, equipment, motors,
pumps, etc.
Type 3: Plug-in SPD
Type 4:
Usually treated as a UL Recognized component
in a larger UL Listed finished product. Examples:
UL 508 control panels, medical equipment, wind
turbines, signage, conveyers, elevators, etc.
Type 1 XP Series SPD
The STXP Series is a Type 1 SPD and suitable for use in
all locations. Type 1 SPDs are evaluated more rigorously
by UL for NEC Article 285 compliance. Type 1 SPDs have
®
been evaluated for line side applications without need
for supplemental overcurrent protection. Type 1 SPDs
include internal overcurrent protection. There are practical
maintenance reasons for installing on load side of the
main overcurrent device (i.e. Type 2 installation). When
connected on load side of main disconnect, its recommend
connecting a 30A circuit breaker to protect the 10 AWG
conductors. The circuit breaker serves as a disconnect
switch and provides NEC
®
to the conductors in Type 2 or 4 applications.
NEC Art 285 & UL 1449
®
SPD Types: Type 1, 2, 3, & 4
Based on location within electrical distribution
system (also coincides with ANSI/IEEE C62.41.2 - 2002
Categories C, B &A)
imposed short circuit protection