11
Instruction Booklet
IB01900004E
Effective July 2016
Magnum breaker remote
racking device (MRR1000)
EATON
www.eaton.com
5.
To begin insertion of the circuit breaker, depress and hold the red
“IN” 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 into the
cell . The mounting flanges of the MRR1000 will pass through
the door opening . The rubber gasket that surrounds the breaker
face will easily push aside . (On arc-resistant style breaker doors,
the retractable bellows will also permit insertion of the remote
racking device .)
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 “CONNECT”
position can be verified by the status indicator in the lower right
corner of the breaker face .
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.
m
CAUTION
THE MOTOR DOES NOT HAVE AUTOMATIC SHUT-OFF. ONCE THE BREAKER
LEVERING DEVICE REACHES THE END OF ITS TRAVEL, THE MOTOR WILL
CONTINUE TO TURN WHILE THE SHAFT/CLUTCH MECHANISM (FIGURE 11)
WILL COMPENSATE FOR THE INCREASED TORQUE BY SLIPPING BETWEEN
THE SHAFT AND MOTOR. CONTINUING TO OPERATE THE MOTOR FOR AN
EXTENDED PERIOD PAST THE OPERATING LIMITS WILL CAUSE EXCESSIVE
WEAR ON THE CLUTCH AND MAY PREMATURELY SHORTEN THE LIFE OF
THE REMOTE RACKING UNIT.
8.
Withdraw the shaft/motor assembly from the drive socket by
pulling rearward on the handle . If the shaft seems to bind with
the drive socket, utilize the “JOG IN” or “JOG OUT” buttons
described in Step 4 .4 .2 above to free the shaft .
9.
The levering device access door will close . If the door does not
close, the breaker is not fully in the “CONNECT” position .
10.
While supporting the weight of the MRR1000, pull out the locking
pin (
Figure 2
) to release the locking handle and rotate the handle
rearward . The unit can now be removed from the circuit breaker .
m
CAUTION
ALWAYS REMOVE THE REMOTE RACKING DEVICE FROM THE BREAKER
WHEN NOT IN USE.
4.5 Procedure for remotely tripping or closing
a power circuit breaker
4.5.1 General
The MRR1000 offers the added safety feature of opening or closing
the breaker contacts from a distance using the remote pendant .
These instructions assume the breaker is contained within the breaker
compartment with the MRR1000 attached to the face of the breaker
per the steps outlined in other portions of this instruction booklet .
4.5.2 Operation
1.
The levering device access door on the face of the breaker
must be closed for any open or close operations to function
(
Figure 1
) . This is an internal safety feature of the Magnum
DS family of circuit breakers . Failure to close this door will not
prevent operation of the MRR1000, but operation of the open/
close buttons will not produce any change of state inside the
circuit breaker .
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.
To open or close a circuit breaker, move an acceptable distance
a
away from the unit with the remote operating pendant in hand .
The maximum extension of the control cord is 25 ft (7 .6 m) .
3.
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 .
4.
To open the contacts of the circuit breaker, depress the green
“OPEN” button . The MRR1000 solenoid will fire and activate the
“OPEN” feature of the circuit breaker .
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.
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.
5.
To close the contacts of the circuit breaker, depress the red
“CLOSE” button . The MRR1000 solenoid will fire and activate
the “CLOSE” feature of the circuit breaker .
otee:
N
Breaker closing springs require charging before the breaker contacts
will close . This can be accomplished using the manual charging handle
present on every breaker; or on electrically operated breakers, springs can
automatically charge via an electric motor circuit .
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.
m
WARNING
USE OF THE MRR1000 DOES IN NO WAY OVERRIDE NOR ELIMINATE
STANDARD SAFETY PRACTICES FOR WORKING WITH POWER CIRCUIT
BREAKERS. INTERLOCKS AND OTHER SAFETY FEATURES ESSENTIAL
TO THE TRIPPING OR CLOSING OF THE BREAKER CONTACTS MUST BE
REGARDED WITH THE UTMOST CAUTION DURING ANY INSTALLATION,
OPERATION, OR MAINTENANCE OPERATION.
