www.electroswitch.com Power Edition Vol. 5
Smart Nameplates Add Value to
Switch Panels In Electrical Utilities
Todays sophisticated electric util-
ity control room is deluged with
information. Every new IED or
relay brings the opportunity to
accumulate and display more
complex, real-time data. This
data is invaluable for systems
diagnostics and failure analysis,
but in day-to-day operations,
critical warning and status
information is still best present-
ed through easily viewed panel-
Whether control switches are
operated manually or remotely,
lamps provide an immediate,
unambiguous, easily under-
stood local indication of the Lock-Out
Relay (LOR) and Breaker status, along
with other critical information the oper-
ator needs to know.
Common lamp applications are: local
indication of breaker status, LOR trip
coil integrity, and LOR trip signal detec-
tion. Smart Nameplates incorporate
these functions into the associated
switch or relay.
Smart Nameplates use a new breed of
very bright, low-power LEDs that visu-
ally match the candle power of the
brightest incandescent bulbs, and save
energy, heat, and panel space. Smart
Nameplates detect faults and monitor
voltages so economically that every
switch or relay can be monitored. They
eliminate the need for a separate coil
monitor relay or system voltage moni-
tor, and they are equipped for SCADA
compatible remote annunciation of
critical functions with the addition of a
solid state dry contact in the Smart
Smart Nameplates are currently avail-
able for Lock-Out Relays, Breaker
Control Switches, and certain remotely
controlled devices. A Smart Nameplate
for an LOR monitors the integrity of the
LOR trip coil and also indicates the
presence of a trip signal. Critical to
almost every protection scheme, the
LOR, or 86 device, is usually slaved to
an IED, a protective relay, or another
When this device
detects a fault parameter sufficient to
warrant equipment shutdown, it sends
a signal to the LOR which immediately
trips; toggling its internal 30A contacts
to open breakers, send alarms, and
perform other necessary safety functions.
The LOR Smart Nameplate provides
effective monitoring of coil health and
lights an LED on the top left of the
This bright LED locally
indicates the coil is intact and ready to
operate. Should the coil fail, the LED
extinguishes and SCADA is signalled.
Additional circuitry further protects the
coil by preventing an operator from
resetting the LOR into a standing trip
signal. As long as the trip signal is pres-
ent at the coil inputs, a second LED
glows to warn against resetting. When
the trip signal is removed, the warning
LED extinguishes, indicating it is safe
to reset the LOR.
The LOR Smart Nameplate package
provides the operator confidence the
coil is intact and the LOR is ready to
respond to the protection scheme.
Electroswitch has also adapted the light-
ed nameplate package for the breaker
control function. The Breaker Control
Smart Nameplate is mounted on the
Electroswitch Series 24 Control
Switch.In this application,one,two,or
three LEDs provide indi-
cation for virtually any
application currently using
panel-mounted bulbs or
LEDs. A voltage across the
two wire leads to a specific
LED will cause that LED
to light up. SCADA com-
patible output is also pro-
vided on the Breaker
Control Nameplate so both
local and remote indication
of monitored events is
The LEDs used in the
Smart Nameplates take
advantage of the remark-
able progress that has been made in the
last few years by offering longer life
(100,000 hours) and much greater
resistance to shock and vibration than
light bulbs.They provide brilliant colors,
producing more light than older devices
by an order of magnitude, especially at
low power levels.
Smart Nameplates have many advan-
tages to the modern control panel:
Visibility - Bright from any angle.
Long LED life - 100,000+ hours.
Easy LED replacement.
All circuitry self contained.
Colors: green,red,amber,blue,& white.
Low initial cost, no wiring labor.
24,48,& 125VDC; 120-240VAC.
SCADA-compatible - Dry contact.
Retrofit kits available.
Even in the most sophisticated utility
environments, the tried and true, well
understood way is still sometimes the
best. Smart Nameplates provide
economical panel annunciation for
the control room of tomorrow.
For complete details on the Smart
Nameplates, please call or FAX our
applications specialists today.
(Series 101 Lighted
Save Costs and
(Control Indicator Module)
The Safety Switch
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