8
Instruction Booklet
IB01900004E
Effective July 2016
Magnum breaker remote
racking device (MRR1000)
EATON
www.eaton.com
4.3.2 Engaging the shaft/motor assembly
1.
Ensure the breaker is in a de-energized state . This can be
accomplished by opening the breaker using control circuits
within the switchgear/switchboard assembly or using the
MRR1000 remote close/trip described in Section 4 .5 .
NOTICE
FOR COMPLETE INSTRUCTIONS ON INSTALLATION, OPERATION, AND
MAINTENANCE OF THE MAGNUM DS FAMILY OF CIRCUIT BREAKERS,
REFER TO THE PUBLICATIONS LISTED IN SECTION 7 OF THIS DOCUMENT.
2.
Lift the levering device access door immediately in front of
the square drive shaft (
Figure 7
) . If the breaker has not been
de-energized, this door WILL NOT OPEN .
m
DANGER
DO NOT TRY TO DEFEAT THIS INTERLOCK. ATTEMPTING TO RACK-OUT
AN ENERGIZED BREAKER MAY RESULT IN DEATH, SERIOUS INJURY, OR
PROPERTY DAMAGE.
Figure 7. Magnum DS levering device access door
3.
Using the handle on the rear of the shaft/motor assembly, gently
push the motor toward the breaker . The assembly will disengage
from the detent and slide forward .
4.
In most instances, the square drive shaft will not by default align
with the square drive socket within the circuit breaker . While
pushing gently on the handle and simultaneously using the
adjustment buttons on the faceplate display labeled: “JOG IN” or
“JOG OUT” (
Figure 8
), the drive shaft can be minutely rotated
to permit alignment of the two mating parts . Once aligned, push
the shaft into the socket until it stops .
4.3.3 Remote operation
1.
If the unit was not connected to AC power in Step 4 .2, do so now .
2.
The “READY” light on the faceplate display will indicate the
status of the unit .
3.
Using the remote operation pendant (
Figure 9
) move an
acceptable distance
a
away from the unit . The maximum
extension of the control cord is 25 ft (7 .6 m) . Ensure the operator
will be able to see the faceplate display on the housing of
the MRR1000 . Visibility of the “TURNING” light (
Figure 8
) is
important as described in Step 5 below .
4.
The operating pendant requires two hands to operate . The
“ENABLE” button must always be depressed to activate any of
the other buttons . Depressing the “ENABLE” button will cause
the “READY” light on the pendant to illuminate . If the “READY”
button does not illuminate, see Troubleshooting in Section 6 .
a
An acceptable distance shall be determined by completing an Arc Flash Incident Energy Calculation
and by using the company’s Personal Protective Equipment and Safety Policy.
Figure 8. MRR1000 faceplate display
5.
To begin removal of the circuit breaker, depress and hold the
green “OUT” button . The motor will begin to turn and the
“TURNING” light on the faceplate will begin to blink . The
“TURNING” light will blink repeatedly while the shaft is rotating .
6.
The circuit breaker and the MRR1000 will begin to travel out of
the cell .
NOTICE
THE CIRCUIT BREAKER MECHANISM IS INTERLOCKED SUCH THAT
CHARGED CLOSING SPRINGS ARE AUTOMATICALLY DISCHARGED IF THE
CIRCUIT BREAKER IS LEVERED INTO OR OUT OF THE CELL. DISCHARGE
TAKES PLACE BETWEEN THE DISCONNECT AND TEST POSITION. THIS IS
NORMAL OPERATION.
7.
When the “TURNING” light ceases to blink
a
, the breaker
levering device has reached the end of its travel . Release
the buttons on the pendant to stop the motor . Breaker
“DISCONNECT” position can be verified by the status indicator
in the lower right corner of the breaker face (
Figure 10
) .
a
Depending on the position of the shaft/clutch mechanism, the “TURNING” light may be either off
or steady on to indicate a stopped condition.
