5
Instruction Leaflet
IL15465
Effective May 2011
A200 Size 3 or 4, 3 Pole Motor Controller
EATON CORPORATION
www.eaton.com
MAINTENANCE - First Turn Off Power
To Inspect Contacts
Refer to Figure 7. Loosen the two arc box assembly screws (7)
located immediately above and below the nameplate and remove
the arc box (8). Contacts (5) are visible. Retighten the screws per
Table VII.
To Replace Contacts
After removing the arc box and with replacement contacts at
hand, compress the overtravel spring (12) and remove the moving
contact (5) from the crossbar (6). Remove the retaining screws
(11) and lift out the stationary contact carriers (14).
To replace contacts, reverse the above procedure making sure
that stationary contacts are secure, (see Table VII) moving
contacts are free to move overtravel springs are seated and the
crossbar moves freely when the arc box is in position.
The silver cadmium oxide contact buttons need
NO
dressing or
lubricant throughout their life.
Important -
Replace all contacts and springs as a group to avoid
misalignment.
To Replace The Coil
Refer to Figure 7. Loosen the assembly screws (10) located
to the immediate left and right of the arc box. Remove connector
straps to the overload relay. Pull the loosened upper base structure
(9) forward.
Pull the coil (1) from the upper base, plug in a new coil, replace the
upper base structure and check the auxiliary contacts for secureness
when repositioning the upper base. Tighten the assembly screws
and the connector straps screws referring to Table VII.
Magnet - Armature Assembly
Self alignment and permanent air gap features of the magnet
armature make replacement unnecessary. Mating pole face
surfaces should be kept clean.
Arcbox must be in place when controller interrupts a cir-
cuit.
