10
Instruction Booklet
IB022003EN
Effective April 2018
Revision #3
Instructions for installation, operation, and
maintenance of Type MVS-ND, metal-enclosed
switchgear assemblies: 4.76 kV or 15.0 kV class
EATON
www.eaton.com
Switchgear assembly inspection before
startup
Each switch is properly adjusted at the factory before shipment .
However, vibration and mechanical stresses imposed by transit and
installation can adversely affect switch adjustment . Therefore, a final
inspection is essential before energizing . If this inspection reveals
any defects in adjustment, they should be corrected according to
alignment procedures in IB022004EN .
Step 1: Check the bolted bus connections for proper tightness,
referring to MVS-ND switchgear bolt tightness for bus
connections on Page 13 for torque values .
Step 2: Check to see if the space heaters, if supplied, are
energized .
Step 3: Wipe away any dust or dirt that may have accumulated
in compartment(s), paying particular attention to insulators
and insulating material . If bus is insulated, see Electrical
parts and insulation check and cleaning on Page 11 for
cleaning procedures .
WARNING
USE OF SOLVENTS, OILS, JOINT COMPOUNDS, OR GREASES ON OR NEAR
NORYL INSULATION WILL DESTROY IT. CLEAN ONLY WITH WATER OR
ISOPROPYL ALCOHOL.
WARNING
NORYL INSULATED EQUIPMENT: ELECTRICAL JOINT COMPOUNDS MUST
NOT BE USED ON CONNECTIONS OR TERMINATIONS TO OR FROM THIS
EQUIPMENT. DO NOT USE SOLVENTS, OILS, OR GREASES ON OR NEAR
THIS EQUIPMENT. WATER AND ISOPROPYL ARE THE ONLY APPROVED
CLEANERS FOR THIS EQUIPMENT.
CAUTION
ISOPROPYL ALCOHOL IS FLAMMABLE. PROVIDE ADEQUATE VENTILATION
AND KEEP AWAY FROM FLAMES AND OTHER IGNITION SOURCES.
CONSULT YOUR SAFETY DEPARTMENT BEFORE USING.
Step 4: A final thorough inspection should be made to ensure that
no tools or other objects are accidentally left inside the
enclosure .
WARNING
DEFEATING OR DISENGAGING SAFETY INTERLOCKS ON AN MVS-ND
SWITCH THAT IS CONNECTED TO A POWER SOURCE MAY RESULT IN
PROPERTY DAMAGE, BODILY INJURY, OR DEATH. DO NOT DEFEAT OR
DISENGAGE ANY SAFETY INTERLOCKS.
Inspection before startup
Each MVS-ND switchgear assembly is functioning properly at
the factory before shipment . However, vibration and mechanical
stresses imposed by transit and installation can adversely affect
the switchgear assembly and its component devices . Therefore, an
inspection is essential before energizing . If this inspection reveals
the switchgear assembly or any component device has come out
of adjustment, the switchgear or its component device should be
readjusted according to this instruction bulletin and the associated
instruction documents for the component .
Inspection procedures require closing and opening the switch
with the main door open . This requires override of the switch
safety interlocks . This is described in the switch instruction bulletin
IB022004EN .
•
When fuse mountings are supplied, check to ensure the fuse
mountings are securely fastened
•
Perform the recommended procedures in Insulation and
conductor maintenance on Page 11 to assure the insulation
integrity of the switchgear assembly
•
A final, thorough inspection should be made to ensure that no
tools or other objects are accidentally left inside the enclosure
