Advanced Protection SPDee - Manual (Page 4)

Hazardous voltage.
Will cause death or serious injury.
Keep Out.
Qualified personnel only.
Disconnect and lock off all power before
working on this equipment.
V
DANGER
For example, suppose a 480V three phase motor
appears to be connected as a 480V Delta. In
actuality, the serving distribution system might be
a 480Y/277V grounded Wye, with or without a
neutral pulled to the motor or MCC. The system
is still a 480Y/277V Wye, even though the load
is connected as a Delta. A grounded Wye has a
defined reference to ground (i.e., neutral is bonded
to ground). In contrast, some Delta systems are
ungrounded, which have no reference to ground.
SPDs on Ungrounded Systems
Caution – Ungrounded systems are inherently
unstable and can produce excessively high line-
to-ground voltages during certain fault conditions.
During these fault conditions, any electrical equipment
including an SPD, may be subjected to voltages which
exceed their designed ratings. This information is
being provided to the user so that an informed decision
can be made before installing any electrical equipment
on an ungrounded power system.
Connecting Optional Form C Dry Contact
& Audible Alarm
Three (3) 3’ (~1m) 18 AWG wires are included through
the nipple with this option. See Figure 6. (These are
smaller than the 10 AWG SPD conductors.) Gray is
Common, Blue is Normally Open and Red is Normally
Closed. (We generally recommend the Normally
Closed configuration because it detects disconnected
or failed wiring whereas normally open does not.)
If the dry contacts are not utilized, insulate lead
ends, coil and secure. Audible Alarm will still
function correctly.
The contact is rated 250V, 5A. Higher energy
applications require supplemental relaying. This
option monitors suppression element condition
and is not intended for use as phase loss or phase
detection monitoring.
NOrMAL OPErATION
Green LED Indicator
The LED indicator illuminates when the SPD
is energized and operating correctly. Indicator
operation: Every suppression element is connected
via logic to the green LED. Should any suppression
element fail, the green LED will extinguish.
Form C Dry Contact and Audible Alarm Option
Similar to the green LED above, the Dry Contact will
change state and the Audible Alarm will sound upon
any suppression element failure. The Audible Alarm
may be silenced by removing power to the SPD.
MAINTENANCE
SPDs require minimal maintenance. We
recommend periodic inspection of diagnostic
indicators to ensure proper operation. We also
recommend keeping the SPD clean as appropriate.
Troubleshooting & Service
Please contact us for any service related issues.
We want to take care of any problems.
Quality SPDs withstand severe duty and attempt to
protect their load until failure. There are electrical
anomalies that SPDs cannot protect against. These
are generally Sustained Overvoltages also known
as Temporary Overvoltages (TOVs). In this context,
Sustained Overvoltages may be only a few cycles.
Failed SPDs tend to be symptoms, not root causes.
We suggest treating a failed SPD as a ‘canary in the
coal mine’ as there may be larger issues at play. As
a generalization, the single largest ‘killer’ of SPDs
is reference to ground issues. If the SPD shows
problems on startup, there is reasonable chance
of bonding/grounding/misapplication issue. This
permanently damages the unit. If not corrected, it
will happen again.
There are no user serviceable parts inside. We
strongly recommend against disassembly.
Units may be returned to the factory for factory service,
qualification and return. Please contact factory at
(800) 237-4567 for assistance.
Any returns need a
return Authorization (rA) number.
4
Power
Leads
Dry
Contact
Leads
Blue
Grey
Red
▪
Normally Closed (suggested):
Use Gray and Red
▪
Normally Open: Use Gray and Blue
Figure 6
LEADS