6
Instruction.Leaflet.
IL 29C401J
Effective December 2010
Installation Instructions for Series C F-Frame
Motor Circuit Protector Type HMCP & HMCPS
EATON CORPORATION www.eaton.com
TABLE 3-2: SPECIAL APPLICATION MCP TRIP SETTINGS
Cam
Setting
Continuous
Ampere
Rating
MCP
Catalog
Number
MCP
Trip
Setting
A
25A
HMCP025D0
40
B
43
C
46
D
49
E
52
F
55
G
58
H
60
A
50A
HMCP050G2
81
B
87
C
93
D
98
E
103
F
109
G
115
H
120
A
70A
HMCP070J2
114
B
122
C
130
D
139
E
145
F
153
G
160
H
168
A
100A
HMCP100L3
163
B
174
C
185
D
196
E
207
F
218
G
229
H
240
Motor FLA ranges are typical. The corresponding trip setting is
13 times the FLA value shown. The + 20% trip tolerance can af-
fect trip response and require increase in cam setting per para 3-2.
For dc applications, actual trip levels may exceed the values
shown by as much as 100%. Actual dc trip values are application
dependent.
Settings above 130 amps are for special applications. N.E.C.
Article 430-110(a) requires the ampere rating of the disconnecting
means to be not less than 115% of the motor full ampere rating.
4. INSPECTION AND FIELD CHECKS
Series C molded case MCPs are designed to provide years of
almost maintenance-free operation. The following procedure
describes how to inspect and test a MCP in service.
Inspection
MCPs in service should be inspected periodically. The inspec-
tion should include the following checks.
BEFORE INSPECTING THE MCP IN AN ELECTRICAL
SYSTEM, MAKE SURE THE MCP IS SWITCHED TO
THE OFF POSITION AND THAT THERE IS NO VOLT-
AGE PRESENT WHERE WORK IS TO BE PERFORMED.
THE VOLTAGES IN ENERGIZED EQUIPMENT CAN
CAUSE DEATH OR SEVERE PERSONAL INJURY.
CAUTION
MAKE SURE THAT CLEANING AGENTS OR SOLVENTS
USED TO CLEAN THE MCP ARE SUITABLE FOR THE
JOB. SOME COMMERCIAL CLEANING AGENTS WILL
DAMAGE THE NAMEPLATES OR MOLDED PARTS.
4-1.
Remove dust, dirt, soot, grease, or moisture from the
surface of the MCP using a lint-free dry cloth, brush,
or vacuum cleaner. Do not blow debris into MCP. If
contamination is found, look for the source and
eliminate the problem.
4-2.
Switch MCP to ON and OFF several times to be sure
that the mechanical linkages are free and do not bind.
If mechanical linkages are not free, replace MCP.
4-3.
Press the PUSH-TO-TRIP button to mechanically trip
the MCP. Trip, reset, and switch MCP ON several
times. If mechanism does not reset each time the MCP
is tripped, replace the MCP.
4-4. Check base, cover, and operating handle for cracks,
chipping, and discoloration. MCPs should be replaced
if cracks or severe discoloration is found.
