Maintenance - Eaton Cutler-Hammer MP1 Series Instructions Manual

Page 18
C. With Generator Running, Switch Does
Not Transfer the Load to Emergency.
1. Check Operation. Make sure time has
passed to allow for TDNE time delay.
2. Check Engine Controls. Check
generator output frequency and
voltage. Output should be at least 90%
of nominal voltage and 95% of nominal
frequency. Make sure generator output
circuit breaker is closed.
3. Check Wiring. Voltmeter should read
phase to phase voltage between
Transfer Switch EA and EB.
D. Switch Retransfers the Load, but
Generator Continues to Run.
1. Check Operation. Make sure time has
passed to allow for TDEC time delay.
2. Check Engine Controls. Make sure
engine starting control is in the
"Automatic" position.
3. Check Signal Circuit. Disconnect and
tape start signal wires which are
connected to the control panel
terminals 51 and 52. Connect
ohmmeter between these terminals;
reading should indicate an open circuit.

12. Maintenance

WARNING
HIGH VOLTAGES ARE PRESENT IN AND
AROUND TRANSFER SWITCH
EQUIPMENT. BEFORE INSPECTING OR
MAINTAINING THIS EQUIPMENT,
DISCONNECT LINE POWER FROM THE
EQUIPMENT BEING SERVICED BY
OPENING AND LOCKING OUT, IF
POSSIBLE, THE NEXT HIGHEST
DISCONNECT DEVICE. FAILURE TO
FOLLOW THIS PROCEDURE COULD
CAUSE PERSONAL INJURY AND/OR
DEATH.
In general, transfer switch equipment is
designed to be relatively maintenance free
under normal usage. However, because of
the variability of application conditions and
the importance placed on dependable
operation by this type of equipment,
inspection and maintenance checks should
be made on a regularly scheduled basis.
Since equipment maintenance will consist
mainly of keeping the equipment clean, the
frequency of maintenance will depend, to a
large extent, on the cleanliness of the
surroundings. If a significant amount of dust
or foreign matter is present, a more frequent
maintenance schedule should be followed.
It is suggested that visual inspections of the
equipment be made on a regular basis, not
just during regularly scheduled periods.
Always be alert for an accumulation of dirt in
and around the structure, loose parts and/or
hardware, cracks and/or discoloration to
insulation, and damaged or discolored
components.
WARNING
DO NOT perform dielectric tests on the
equipment with the control components
in the circuit.
DO NOT use loctite.
1. Check lubricant in high speed bearings
of the motor and the low speed bearings
of the gear box. For lubrication use Dow
Corning Silicon DC44 or equivalent on
the high speed bearings and Aero Shell
No. 6 grease or equivalent in gear box
after 5000 operations.
2. Check if control components and plugs
are tight in sockets.
3. Periodically inspect all terminals (load,
line and control) for tightness. Re-tighten
all bolts, nuts and accessible hardware.
Clean or replace any contact surfaces
that are dirty, corroded or pitted.
4. Automatic Transfer Switches should be
in clean, dry and moderately warm
locations. If signs of moisture are
present, dry and clean transfer switch. If
there is corrosion try to clean it off. If
cleaning is unsuitable, replace the
corroded parts. Should dust and/or
debris gather on the transfer switch,
brush, vacuum or wipe clean.
WARNING
DO NOT blow dirt into the breaker or
terminals.
5. Test the transfer switch operation. While
the transfer switch is operating, check
for freedom of movement, hidden dirt or
I.L.15.01.T.K
.
Effective June 2000