Advanced Protection TWL - Manual (Page 10)

INDIVIDUAL LIGHT SPD(S) (FIGURE 6)
• Identify an appropriate mounting location for each SPD. Notice that there are four pre-drilled holes for APT SPDee’s
on an upper row. (We recommend using upper row first.) There are also multiple knockouts on a bottom row. Consider
proximity to existing DIN rail connectors.
• Read SPD installation manual.
• Mount SPD to TWL. Notice orientation of LED indicator. Rotate SPD such that LED is visible from front.
• Connect SPD AC-Hot or DC-Positive to terminal block as shown in Figure 6. Torque: 7 lb-in
• Connect SPD AC-Neutral or DC-Negative to terminal block as shown in Figure 6. Torque: 7 lb-in
• Note that both of these are fed through connectors. The load goes in and out of the terminal. The SPD is connected
electrically in parallel, not in series.
• Connect SPD Ground to terminal block as shown in Figure 6. Torque: 7 lb-in
• Configure SPD leads as short and straight as possible. Do Not coil excess leads. Do Not create sharp kinks. Long leads
& sharp bends seriously hurt performance!!
• Repeat for appropriate number of SPDs
Figure 6
Page 7
Each gray terminal block
has three terminals:
Two terminals are visible
on this side
- one from controller (input)
- one to loads on tower (output)
One terminal on the back side (not visible in this photo) for connecting the SPD
Two Ground Terminals
are interconnected via
grounded DIN rail
- Connect lead from
controller to one
terminal
- Connect lead to up-
tower load to the
other terminal
Leads from controller
into terminal block
Leads from terminal
block to loads up tower
Conductors will go
under the AC Power
SPD (If installed last,
this SPD will not be
in the way)
Terminal Blocks without connections
SPD connected
Empty sets of
terminal blocks
(One set per SPD)
Try to use closest set
of terminals to SPD to
keep leads short
Leads from SPD to back
side of terminal block
Individual Light SPDs