Advanced Protection XDS - Manual (Page 3)

Unpacking & Preliminary Inspection
Inspect the entire shipping container for damage
or signs of mishandling. Remove the packing
materials and further inspect the unit for any
obvious shipping damages. If damage is found and
is a result of shipping or handling, immediately file
a claim with the shipping company and forward a
copy to APT.
Storage Environment
This SPD should be stored in a clean, dry
environment. Storage temperature range is -40°C
(-40°F) to +60°C (+140°F). Avoid exposure to
high condensation.
PRE-INSTALLATION & PLANNING
Operating Environment
The standard unit is in a Type 4X enclosure.
Before installing, ensure that your enclosure
type and application are appropriate per NEMA
250 with regard to moisture, dirt, excessive dust,
flammable materials or atmospheres, corrosive
vapors, etc.
This SPD is designed in an ambient temperature
range of -40°C (-40°F) to +60°C (+140°F) with a
relative humidity of 0% to 95% (non-condensing).
Excessive temperature may inadvertently operate
internal thermal overtemperature protectors.
Audible Noise
SPD background noise is negligible or non-
existent, and does not restrict the location of
installation.
Mounting, Dimensions, and Weight
This SPD is designed to be wall or chase nipple
mounted. The standard enclosure is: 6” x 6” x 4”
(152mm x 152mm x 102mm) (L/W/H) and weight
is 5 lbs (2.3 kg). See Figure 2 below.
Service Clearance
Service clearance is needed at the front of the TE
Series unit only, 36 inches minimum is the required
distance for clearance pursuant to the NEC ® .
Cascade Surge Protection
For optimum surge protection, cascade or staged
surge suppression should be implemented at the
service entrance and downstream locations as
appropriate. Known or expected surge sources,
as well as sensitive loads, should also have
localized surge suppression. For interconnected
electronic loads (data cabling), SPDs should also
be utilized to protect the devices on either end of
the interconnecting data cables.
Maximizing SPD Performance
SPDs must be located as close to the circuit as
possible to minimize parasitic losses. Surges are
high current, high frequency events that cause
substantial voltage drops across conductors. This
hurts SPD performance. Use the shortest and
straightest possible leads. Pre-plan installations
and ensure that nearest breaker positions are
used. If new construction, adjust breaker locations
as appropriate.
Tip: Voltage drops for normal 120V or 277V lines might
be 2-3V per hundred feet. In surge applications, voltage
drops might be 100-150V per foot. These voltage drops
add to clamping voltage, thus hurting performance. Make
every effort to keep leads short and straight.
As distribution gear becomes larger, shorter
leads are more difficult to accomplish. When
longer leads are unavoidable, gently twist leads
together (one to two twists per foot), or tie-wrap
leads together.
Tip: surges create magnetic fields per the ‘right-hand rule’.
When current goes in direction of thumb, magnetic field
is in direction of curl of fingers. As surge current goes to
SPD, fields are created in one direction. When the SPD
sends those currents to neutral and/or ground, current
goes in the opposite direction. If ‘coming and going’ are on
the same axis, the magnetic fields can be cancelled, thus
avoiding performance decrease. Gentle twists, bundling
and tie-wraps accomplish this.
Overcurrent Protection
SPDs draw very little current under normal
conditions and conduct for a brief duration upon
encountering a transient surge current. This SPD
contain internal overcurrent and overtemperature
protection to protect against abnormal voltage
conditions.
Supplemental overcurrent protection is not
required to protect this SPD. However, connecting
conductors require protection in Type 2 or 4
applications. Follow applicable codes.
Circuit Breaker and Disconnect Switch
This XD family SPD is tested and qualified as a
Type 1 SPD per UL 1449 Third Edition and 2008
NEC ® . This SPD can be installed on the line side
of the service overcurrent device per 2008 NEC ®
3
MOUNTING & DIMENSIONS Figure 2