10
Instruction Booklet
IB01900004E
Effective July 2016
Magnum breaker remote
racking device (MRR1000)
EATON
www.eaton.com
4.4 Procedure for inserting a power circuit breaker
4.4.1 Installation on the circuit breaker face
1.
A Magnum DS circuit breaker can remain in its breaker
compartment in a disconnected state while the door is closed .
It is not necessary to open the door to operate the MRR1000 .
When facing the circuit breaker, note the small recessed cavity
in the upper right hand corner . This cavity is the principal element
for retention of the MRR1000—ensure this cavity is free from
contaminants such as dust, grease, or oil .
2.
Ensure the shaft/motor assembly is in the rearmost position . Pull
the handle attached to the shaft/motor assembly firmly rearward
to verify the assembly is seated in the rear detent .
3.
Ensure the locking handle is in the unlocked position (
Figure 2
) .
If the handle is in the locked position, pull out on the locking pin
as shown to release the handle .
4.
Lift the MRR1000 to the level of the selected power
circuit breaker .
5.
Align the top flange and two side flanges of the housing with
the nose of the circuit breaker .
6.
Align the neoprene lock (
Figure 3
) with the cavity noted above
(
Figure 4
) . Push the housing of the MRR1000 against the body
of the circuit breaker until it stops .
7.
While supporting the weight of the MRR1000, rotate the locking
handle forward until it clicks into place .
m
WARNING
FAILURE TO FULLY ENGAGE THE NEOPRENE LOCK WILL RESULT IN POOR
CONTACT WITH THE BREAKER CAVITY, INCREASING THE RISK OF THE
UNIT FALLING DURING OPERATION. IN ADDITION, FAILURE TO FULLY
ENGAGE THE LOCKING HANDLE PREVENTS REMOTE OPERATION. SEE
TROUBLESHOOTING IN SECTION 6.
4.4.2 Engaging the shaft/motor assembly
1.
Ensure the breaker contacts are “OPEN” and the closing
spring is “DISCHARGED” . This condition can be verified by
observation of the status indicators on the front of the circuit
breaker (
Figure 12
) . Also ensure the racking mechanism is in the
“DISCONNECT” position as indicated by the position indicator
on the front of the circuit breaker (
Figure 10
) .
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 contacts have not
been opened, this door WILL NOT OPEN .
Figure 12. Magnum DS breaker status indicators
m
DANGER
DO NOT TRY TO DEFEAT THIS INTERLOCK. ATTEMPTING TO RACK-IN A
CIRCUIT BREAKER WITH CLOSED CONTACTS MAY RESULT IN DEATH,
SERIOUS INJURY, OR PROPERTY DAMAGE.
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 .
4.4.3 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.
