Siemens MJ-4A Installation And Operation Manual page 64

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Appendix B Physical Installation on Siemens Regulators
Replacing existing MJ-4 Control Panels
To replace an already-installed MJ-4 Control Panel, the pro-
cedure is similar to that described above.
Polarized Disconnect Switch
Plug the PDS from the new MJ-4 into the female PDS in
the control enclosure.
Terminal Strip Connector
External devices are wired to a terminal strip connector at
the back of the MJ-4 Control Panel. See Appendix K for
pin-outs and signal descriptions.
Hazardous voltage will be present on
various control leads when regulator is
energized.
Could result in death or serious injury
including equipment damage from
contact with live line conductors.
To prevent:
Remove fuses before by-passing the
regulator and leave the fuses out while
the regulator is bypassed.
60
WARNING
Field Maintenance:
The MJ-4 is a state-of-the-art controller utilizing complex
circuits and sophisticated components for the detection,
processing and display of regulator parameters and the
precise control and operation of the tap changer. Field
maintenance is not recommended as special equipment
and instrumentation are required for the proper calibration,
testing and checking of the controller operation.
strongly recommended that MJ-4 controller repair, testing,
and calibration be performed only by Siemens authorized
repair facilities.
WARNING
Use of unauthorized parts and/or unqualified
personnel in the repair of this equipment
could result in death or serious injury including
electrical damage to equipment.
To Prevent:
Only authorized personnel should work on this equipment
including installation, operation and maintenance.
It is
Siemens Energy, Inc.