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Instructions for
VSR-Series Type 5HK
Vacuum Motor Starter
IB01301027E
IB01301027E
Page 24
Page 24
Page 24
Page 24
Page 24
Effective: May 2008
Effective: May 2008
Effective: May 2008
Effective: May 2008
Effective: May 2008
7.5 AUXILIARY CONTACT MAINTENANCE AND REPLACEMENT
If standard contact blocks become oxidized due to very low current
levels passing through the contacts, they may be cleaned by
periodically disconnecting them from the circuit and circulating
approximately 10 amps through the contacts for a short period of
time. If one or more of the auxiliary contacts fail, it is recommended
that the complete contact block assembly be replaced. Disconnect
wiring to each contact, making sure to properly mark each wire to
insure proper reconnection. Remove the two mounting screws
securing the contact assembly to the bearing retainer. Install the
replacement assembly, securing with the two mounting screws.
The contacts are properly adjusted when the plunger to operating
arm gap is .110 inches. (Figures
7-12
and
7-13
).
Figure 7-7 Remove the Coil Mounting Angle
Figure 7-8 Remove the Lockout Securing the Return Spring
Bolt
Figure 7-9 Unscrew the Return Spring Assembly
Figure 7-10 Install New Coils on Cores
Figure 7-11 Stop Assembly Adjustment Block
