- ページ 4

保護装置 Cutler-Hammer GMCPのPDF インストレーション・インストラクションをオンラインで閲覧またはダウンロードできます。Cutler-Hammer GMCP 4 ページ。 Motor circuit protector

ページを印刷する
Page 4
!
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.
!
MAKE SURE THAT CLEANING AGENTS OR SOL-
VENTS 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 vac-
uum cleaner. Do not blow debris into MCP. If contamina-
tion 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.
4-5. Check terminals and connectors for looseness or signs
of overheating. Overheating will show as discoloration,
melting, of blistering of conductor insulation, or a pitting or
melting of conductor surfaces due to arcing. If there is no
evidence of overheating or looseness, do not disturb or
tighten the connections. If there is evidence of overheating,
terminations should be cleaned. Before reenergizing the
MCP, all terminations and cable should be refurbished to
the condition when originally installed.
4-6. Check MCP mounting hardware; tighten if necessary.
WARNING
CAUTION
Cutler-Hammer
Pittsburgh, Pennsylvania U.S.A.
Effective 12/98 (ISI)
Style 8703C84H03
Printed in U.S.A.
4-7. Check area where MCP is installed for any safety haz-
ards including personal safety and fire hazards. Exposure
to certain types of chemicals can cause deterioration of
electrical connections.
Field Testing
Any field testing should be done in accordance with NEMA
Standards Publication AB4-1991.
Table 3.1 GMCP Trip Settings
Cam
Motor
NEMA
Setting
Full Load
Starter
Current
Size
Amperes
A
1.1 - 1.2
B
1.3 - 1.5
C
1.6 - 1.7
0
D
1.8 - 1.9
E
2.0 - 2.2
F
2.3 - 2.5
A
2.6 - 3.1
B
3.2 - 3.6
C
3.7 - 3.9
0
D
4.3 - 4.7
E
4.8 - 5.2
F
5.3 - 5.7
A
5.7 - 6.8
B
6.9 - 7.9
C
8.0 - 9.1
0
D
9.2 - 10.3
E
10.4 - 11.4
F
11.5 - 12.6
A
11.5 - 13.7
B
13.8 - 16.0
C
16.1 - 18.3
1
D
18.4 - 20.6
E
20.7 - 22.9
F
23.0 - 25.2
A
19.3 - 22.9
B
23.0 - 26.8
C
26.9 - 30.6
2
D
30.7 - 34.5
E
34.6 - 38.3
F
38.4 - 42.1
A
23.1 - 27.5
B
27.7 - 32.2
C
32.3 - 36.7
2
D
36.9 - 41.4
E
41.5 - 46.0
F
46.2 - 50.5
A
24.2 - 32.1
B
29.1 - 34.8
C
33.9 - 39.4
2
D
38.8 - 46.4
E
43.6 - 48.9
F
48.5 - 53.7
Motor FLA ranges are typical. The corresponding trip setting is at 13 times the minimum
FLA value shown. Where a 13 times setting is required for an intermediate FLA value,
alternate cam settings and/or MCP ratings should be used.
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 load ampere rating.
I.L. 15579B
Continuous
GMCP
GMCP
Amps
Catalog
Trip
Number
Setting
15
18
3
GMCP003A0
21
24
27
30
35
42
7
GMCP007C0
49
56
63
70
75
90
15
GMCP015E0
105
120
135
150
150
180
30
GMCP030H1
210
240
270
300
250
300
50
GMCP050K2
350
400
450
500
300
360
60
GMCP060J2
420
480
540
600
315
380
63
GMCP063M2
440
500
570
630