Why the QSI PowerGuard was
developed for all AC operated, electronically controlled trains.
* Power Line generated spikes cannot get through any
transformer.
Transformers are designed to
allow only a narrow band of frequencies pass thru in the range of 45 to 65 Hz,
eliminating any and all line voltage spikes, which are of much higher
frequency.
What this means is that house line voltage current and surge
protectors and more complex line conditioners have no effect on preventing line
spikes from going thru any transformer. It is the transformer itself.
* So if no line spikes can
get threw the transformer, what is the problem?
Transformers generate their
own spikes, which will occur at every output current interruption. You have
been witness to this phenomena with moving derailments, as they often execute
with a shower of sparks. There is always a spike behind every spark.
The QSI PowerGuard was
designed to snub all AC track voltage train operation generated spikes, both
large and small.
What the QSI PowerGuard does:
* Protects on-board sound and
train control systems from damage caused by transformers sending excessive
electrical noise, over-voltage or voltage spikes to the track.
* Shows track voltage and relative strength of the horn and
bell signals
WHAT:
The Power Guard was developed
by QSI in response to the proliferation of modern toy train 3-rail transformers
that surpassed the non-powerful transformers spikes of the day. These new
electronic transformers presented killer spikes.
PROBLEM:
Killer spikes are generated
by all modern 3-rail transformers and happen whenever the transformer’s current
is interrupted.
Derailments, shorts from
passing over switches, engine’s rollers momentarily loosing contact, a wheel
set jumping off the track and being dragged and pressing the direction button
all will result in spikes.
SOLUTION:
The QSI PowerGuards being
offered are manufactured by STR under license to QSI.
All are Brand New in Factory
labeled shipping box with all paperwork.
Consider a QSI's PowerGuard
cost as a 1 time payment on a Paid Up Life Insurance Policy for your
Locomotives' Electronics.
For complete protection on
your layout, connect a QSI PowerGuard to each throttle operating trains with
electronics in them.
Works with any Toy Train
Transformer, since the beginning of electric trains.
Also works with Lionel's TMCC
& Legacy and MTH's DCS.
DESCRIPTION:
Power Guard has 3 Lights and
1 Switch
The Red and Orange
incandescent lights qualitatively indicate Voltage, and each one shows one
Polarity of the center rail. Red shows + (Whistle/Horn On) and Orange shows –
(Bell On/Off). Excellent for troubleshooting.
The Red LED shows all the
spikes suppressed. The circuit suppresses small ones (dim flashes) as well as
large ones (bright flashes).
The switch cuts in/out an
additional resistive load to enable some locos to better cope with the Reset
Signals Search which is found in the whole line of QSI 3-rail sound systems.
Every time there is a power interruption while your loco is running, the transformer generates one or many more spikes. Interruptions are occurring when you see sparks, however there are more subtle ones also, such as in roller bounce, dirty track, crossing switches and crosstracks that the QSI unit also suppresses.
Post War transformers can easily generate 45 Volt spikes and the new electronically regulated transformers can generate 90 Volt spikes. QSI's Power Guard nips them in the bud, reducing them to a harmless value.
CONNECTIONS:
Power Guard has 2 leads:
Orange (goes to the Center
Rail) &
Brown (goes to the outside
Rails).
The Power Guard leads can be
connected anywhere from the Transformer Taps to the Track Clips.
When using Power Programmer, SideKick II, DCS or TMCC, the "Transformer connections" are moved to the output of the device connected to the track.
See Page 125, -6 of the revised QS-3000 manual. See 2b below.
Complete Instructions
Included
SIZE:
Dimensions: 4.16 " L,
1.9" H, 2.2"W
Incandescent Lamp Covers
stand 0.4" above case.
WARRANTY: 1 year from date of purchase.