CBS CBS ArcSafe RRS-3-MDSR1 User manual

RRS-3-MDSR1
A Portable Device for Remotely Racking
Easton Magnum DS/SB
Circuit Breakers
User’s Manual
User’s Manual
Model RRS-3-MDSR1
1.0 Arc-blast Hazards
2.0 Application Information
3.0 General Safety Information
4.0 Cables
5.0 Carrying Case
6.0 Controller
7.0 Power Supply
8.0 Racking Head
9.0 Sequence of Operation
10.0 Care and Storage
11.0 Specifications
12.0 Troubleshooting
13.0 Warranty

1.0 Arc-blast Hazards
The hazards associated with electrical arc-blasts are
well documented. Studies conducted by numerous
industries and professional organizations have sought
to quantify the intensity of arc-blast, the risks to
personnel, and various methodologies for mitigating
the risks.
Without doubt, increasing the distance between the
arc and a human is the single greatest favorable factor
in reducing injuries.
Remote racking is not a panacea, but rather one more
tool available for protecting workers while they are
performing electrical switching.
Using the MDSR1 remote racking device may not
negate the need for additional personal protective
measures. The user is ultimately responsible for
evaluating each situation to determine if additional
protective measures are needed.
risk of serious in
j
ury or death.
This device should only be used
by qualified persons after
careful analysis of the hazards.
WARNING
Breaker rackin
g
may present
2.0 Application Information
The MDSR1 is suitable for most Magnum DS/SB circuit
breakers manufactured by Cutler-Hammer.
The same internal racking mechanism was utilized for
all Magnum DS/SB breakers, regardless of the frame
size.
DO NOT attempt to use the MDSR1 with any breaker
other than a Magnum DS/SB breaker.
3.0 General Safety Information
Carefully read and comply with all safety instructions
listed below.
The MDSR1 contains sealed lead-acid (SLA) batteries.
In the unlikely event of a battery rupture, treat all
liquids and vapors as potentially hazardous (sulphuric
acid).
Whenever the MDSR1 is powered from an AC source,
always use the (included) GFCI-equipped power cord.
If the GFCI trips two consecutive times, discontinue
AC-powered use and contact the factory. (220VAC
models are not available with a GFCI-equipped power
cord.)
Whenever the lid is open the unit must be protected
from water intrusion.
Never close the carrying case while the unit is
powered on.

4.0 Cables
4.1 Connecting and disconnecting the control
cable
1. Align the keyway on the cable connector with the
key on the power supply connector.
2. Push in and engage the thread on the coupling nut
and turn clockwise.
3. Use a similar technique to connect the cable to the
controller.
4.2 AC Power Cable / GFCI
ALWAYS use the GFCI-equipped power cable that
was supplied with the MDSR1. The automatic GFCI
does not require resetting upon initial power-up.
However, the GFCI should be tested prior to use by
depressing the white TEST button. The GFCI should
then trip. It is necessary to press the red Reset
button before proceeding.
If the GFCI fails to trip when the Test button is
depressed, DISCONTINUE AC-powered USE
immediately and contact the factory.
If the GFCI tests properly without a load, but
trips when a load is applied, a ground fault
exists. A REAL SHOCK HAZARD EXISTS!
Immediately discontinue use and contact the
factory.
If the MDSR1 is supplied from an extension cord, the
GFCI cannot sense an upstream ground fault, i.e. a
fault in the extension cord. For this reason, extension
cords should be connected to a GFCI outlet or portable
GFCI. (GFCI is not included when ordered with
220VAC option)
4.3 Racking Head Cable
The racking head cable is a high-quality, super-
flexible, multiple conductor cable, with an overall
braided shield. The racking head cable can easily be
coiled and stored in the pocket toward the front of the
carrying case.
Care should be taken to ensure the carrying case lid
does not crush any of the cables.
5.0 Carrying Case
To lessen the chances of a tip over, the telescoping
tag-along handle should be completely collapsed
whenever the MDSR1 is in use.
To safeguard against
the case lid breaking
the control cable
connector, the lid
latches should always
be left in the 'down'
position whenever
the lid is open.

6.0 The Controller
The controller is designed for two-hand operation for
the purpose of preventing inadvertent operation of the
racking motor. See the following section for a detailed
description of the controller features and function.
6.1 The ENABLE button:
Upon initial power-up, the Enable button must be
depressed for at least one second in order to advance
to the next video screen.
Rocker
Switch
Enable
6.2 The Rack IN / Rack OUT rocker switch:
The rocker switch is used to select whether the
racking motor racks the breaker IN or OUT. The
rocker switch is spring return to center, OFF.
The Enable button and rocker switch must BOTH be
HELD CONTINUOUSLY in order to run the racking
motor.
6.3 Startup Screens
The video screen serves multiple functions.
Upon powering-up the MDSR1, the introductory screen
will appear. Pressing the Enable button for one
second will advance the display to the next screen.

After reading the warning screen, once again depress
the Enable button for one second to advance to the
normal operating screen.
6.4 Operating Screen
The operating screen allows the user to constantly
monitor:
 the breaker's position
 the instantaneous torque being applied
 the direction the breaker is moving, and
 the battery's level of charge.
6.5 Torque Limiter Failure
 The control circuitry is designed to allow a pre-
determined maximum current to flow to the
racking motor, thereby precisely controlling
torque.
 An independent circuit, utilizing a Hall-effect
current sensor, continuously monitors the
amount of current flowing to the motor. This is
used for the torque bargraph that is displayed
on the video screen.
 If the motor current exceeds a certain value the
control system will inhibit ALL operations and
display the message shown above.
 It is possible that a spurious current has falsely
triggered this response. Simply turn the main
power switch OFF and back ON. If the message
appears again, discontinue using the device
until the factory has been consulted.

7.0 Power Supply
7.1 Power Supply Indicators
RED indicate that AC power is present.
GREEN indicates DC power is present.
YELLOW indicates that DC voltage has fallen to
approximately 21 volts and that the unit should
be supplied from AC power as soon as possible.
See section 7.4.
AC power
receptacle
Power switch
Control
cable jack
AC fuse
Indicator
lights
7.2 Power Supply Function
The MDSR1 may be powered from either, the on-
board batteries or from a 115 volt, 60 hz, AC source
(Also available in 220vac 50/60hz upon request). If
AC power is present, the power supply will
automatically switch from batteries to the AC source
and begin recharging the batteries.
Ensure the cooling fan exhaust is never restricted
while the unit is powered on. NEVER completely close
the case lid with power switch in the ON position.
7.3 Recharging the Battery
In order to recharge the batteries, simply provide AC
power and turn the power switch ON. The red AC
indicator and green DC indicator should be illuminated
and the cooling fan should be running. The control
cable does not need to be plugged-in. Although the
power supply regulates the charging voltage and
current, it is preferred that the unit not be
continuously charged for more than 24 hours.

8.0 The Racking Head
Key components of the Racking Head are as follows:
Camera
housing Drive Element
Tang
Flashing
Red/Blue
'Running'
indicator Motor shaft
handwheel
Latch
8.1 Inserting the Racking Head to Rack the
Breaker
Raise the racking engagement window shutter on the
breaker and insert the racking head, engaging the
racking screw. When fully engaged, the latch should
easily rotate downward into the lockout hole in the
shutter.
BE SURE TO HOLD THE
LATCH UP WHILE
TRYING TO INSERT THE
RACKING HEAD
It may be difficult to
engage the 4-point
opening on the racking
screw. Use the
handwheel to manually
reposition the drive
element slightly.
TO AVOID DAMAGE
NEVER push, pull or twist
on the camera housing
while installing or
removing the racking
head.

8.2 Racking to 'full in' or 'full out' Limits
The MDSR1 electronically limits the amount torque
that is applied to the racking mechanism. By
observing the torque bargraph on the right side of the
video display, the operator should notice an increase
in torque as the breaker stabs are engaging the
switchgear bus, as well as when the breaker is racked
to either extreme limit (racked in or racked out).
Anytime the racking motor drives to a stalled
condition, the control system will stop the motor and
then reverse direction to back-off the racking
mechanism by approximately 1/2 turn of the racking
mechanism -- provided both, the Enable button and
Racking rocker switch are held. The video display will
then indicate "Complete".
Additionally, the racking motor is equipped with a
stall-sensor to sense motor stall. DO NOT be hesitant
to run the racking motor to 'full stall' in either
direction. To protect the racking motor, the control
system limits the amount of time the motor can
remain in a stalled condition, as well as limiting the
motor current to a safe level.
9.0 Sequence of Operation:
Connect the control cable to the power supply and
handheld control unit. 4.1
If AC power is used, test the GFCI. 4.2
Power-up the power supply by turning toggle switch
ON. The green 'DC' light should illuminate. If the
unit is plugged into AC power, the red 'AC' should
illuminate too. The cooling fan should be running.
If the yellow 'Low DC' light comes on, plug the unit
into an AC power source.
7.0
Observe the screen on the handheld controller.
Press the Enable button to acknowledge you have
read the warnings and to advance to the next
screen.
6.0
Install the racking head. 8.0
Standing outside the arc-flash boundary zone,
depress the Enable button while simultaneously
depressing the Racking rocker switch in the desired
direction, i.e. Rack IN or Rack OUT.
6.0
Observe the video display to monitor the breaker
position indicator as well as the torque that is being
applied. 6.3
Release either, the Enable button or the Racking
rocker switch to stop the racking motor at any time. 6.0
If the Enable button and Racking rocker switch are
held continuously, once the motor drives to a
stalled condition, it will automatically stop, and
reverse directions until the racking nut (socket)
turns approximately 1/2 turn. The display will then
say "Complete".
8.2
Steps
See
Section

10.0 Care and Storage
The MDSR1 contains no user-serviceable parts. The
sealed lead-acid batteries should be replaced at
24-month intervals. Contact the factory.
10.1 Storage
 Never store the batteries where the ambient
temperature might exceed 110ºF, i.e. inside a
vehicle with the windows up, on a sunny day.
 Avoid getting the unit wet or storing it in a high
humidity location. It should be stored in a dry
location.
 The hand-held controller, racking head, and
cabling should be stored together in the
carrying case.
11.0 Specifications
MECHANICAL
Gearmotor theoretical max torque 36 ft. lbs.
Gearmotor torque limit factor 25 ft. lbs.
Total unit weight 35 lbs.
ELECTRICAL
AC Input voltage 115 volts, 60 Hz
220 volts, 50/60Hz
Available upon
request
AC Fuse type 3 amp, 4AG
Battery voltage 24 volts
Gearmotor voltage 24 volts
Max battery charging current 500 ma
Battery capacity 3.2 Ahr
Battery type sealed lead-acid
Video camera lens 8mm, 40 deg FOV
Video camera light sensitivity 0.1 lux

12.0 Troubleshooting Guide
Symptom Action
Video display doesn't
startup properly.
Turn power supply switch
OFF, wait 3-seconds, turn
power supply switch ON.
Video image is not clear. Clean camera lens with a soft, clean towel or lens
cleaner.
Unit goes into "Lockout"
and displays a message
saying the "torque limiting
circuitry" may have failed.
Cycle power OFF/ON
If "Lockout" recurs,
discontinue use, and
contact the factory.
GFCI trips.
Disconnect power cable
from the MDSR1. Reset
GFCI. If the GFCI will not
reset, either the GFCI or
the power cord is
defective. If the GFCI
only trips when the power
cord is plugged into the
MDSR1, there is an
internal fault. Contact the
factory.
13.0 Warranty
CBS ArcSafe® guarantees all products manufactured by CBS
ArcSafe® only against defects in materials and/or workmanship
for a period of twelve (12) months commencing on the date the
product is received by the customer. THIS WARRANTY IS IN LIEU
OF ALL OTHER EXPRESS OR IMPLIED WARRANTIES INCLUDING
THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.
CBS ArcSafe® will, at its option and its cost (excluding shipping
expenses) repair, replace or refund the purchase price of any
product manufactured by CBS ArcSafe® which has a covered
defect in materials and/or workmanship. THIS IS CUSTOMER’S
EXCLUSIVE REMEDY FOR BREACH OF WARRANTY. IN NO EVENT
WILL CBS ARCSAFE’S® LIABILITY FOR DAMAGES (WHETHER
ARISING FROM BREACH OF CONTRACT OR WARRANTY,
NEGLIGENCE, STRICT LIABILITY OR OTHERWISE) EXCEED THE
PURCHASE PRICE OF THE PRODUCT CONCERNED NOR WILL CBS
ARCSAFE® BE LIABLE FOR PUNITIVE, INCIDENTAL,
CONSEQUENTIAL OR SPECIAL DAMAGES (INCLUDING WITHOUT
LIMITATION LOST PROFITS) EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
This warranty does not cover damage caused by accident,
improper care, negligence, normal wear and tear, natural causes,
unlicensed repairs, and incompetent supervision. This warranty
also does not cover repairs or replacements made by unauthorized
individuals except when agreed to in writing. CBS ArcSafe®
reserves the right to disallow warranty repairs if the unit has been
disassembled or misused, as determined by CBS ArcSafe®in good
faith. Please contact us at [phone]
2616 Sirius Road
Denton, TX 76208
[phone]
[phone]
WWW.CBSArcSafe.com

2616 Sirius Road
Denton, TX 76208
[phone]
[phone]
www.CBSArcSafe.com
US Patent 9,520,248
Copyright 2020, CBS ArcSafe All rights reserved.
User Manual RRS-3-MDSR1 Version 2.1