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10.4 – 11.4 HEM3M015L D 135
11.5 – 12.6 E 150
12.7 – 13.0 F (max) 165
3.9 – 9.1 A (min) 90
11.5 – 13.7 B 150
16.1 – 18.3 C 210
20.7 – 22.9 HEM3M030L D 270
23.0 – 25.2 E 300
25.3 – 26.1 F (max) 330
11.5 – 15.2 A (min) 150
19.2 – 22.9 B 250
26.9 – 30.6 C 350
34.6 – 38.3 HEM3M050L D 450
38.4 – 42.1 E 500
42.2 – 43.5 F (max) 550
16.1 – 30.6 A (min) 210
26.9 – 32.2 B 350
37.6 – 42.9 C 490
48.4 – 53.7 HEM3M070L D 630
53.8 – 59.1 E 700
59.2 – 60.9 F (max) 770
23.0 – 30.9 A (min) 300
38.4 – 46.0 B 500
53.8 – 61.4 C 700
69.2 – 76.8 HEM3M100L D 900
76.9 – 84.5 E 1000
84.6 – 87.0 F (max) 1100
.20 – .33 Low 2.6 .34 – .45 2 4.5 .46 – .56 ED63A001 3 6 .57 – .68 CED63A001 4 7.5 .69 – .81 High 9
.53 – .83 Low 7 .84 – 1.14 2 11 1.15 – 1.45 ED63A002 3 15 1.46 – 1.68 CED63A002 4 19 1.69 – 2.00 High 22
.76 – 1.29 Low 10 1.30 – 1.75 2 17 1.76 – 2.29 ED63A003 3 23 2.30 – 2.68 CED63A003 4 30 2.69 – 3.18 High 35
?ETI Trip Setting
Motor Full Catalog AdjustLoad
Amperes Number ment Amperes
1.23 – 1.99 Low 16 2.00 – 2.75 2 26 2.76 – 3.52 ED63A005 3 36 3.53 – 4.14 CED63A005 4 46 4.15 – 4.90 High 54
2.30 – 3.83 Low 30 3.84 – 5.37 2 50 5.38 – 6.52 ED63A010 3 70 6.53 – 7.68 CED63A010 4 85 7.69 – 9.10 High 100
4.23 – 6.91 Low 55 6.92 – 9.61 2 90
9.62 – 11.91 ED63A025 3 125
11.92 – 13.83 CED63A025 4 155
13.84 – 16.40 High 180
6.15 – 10.37 Low 80
10.38 – 14.22 2 135
14.23 – 18.06 ED63A030 3 185
18.07 – 20.75 CED63A030 4 235
20.76 – 24.50 High 270
8.84 – 14.22 Low 115
14.23 – 19.60 2 185
19.61 – 24.99 ED63A040 3 255
25.00 – 28.83 CED63A040 4 325
28.84 – 34.00 High 375
13.84 – 23.06 Low 180
23.07 – 31.52 2 300
31.53 – 39.99 ED63A050 3 410
40.00 – 46.14 CED63A050 4 520
46.15 – 54.50 High 600
24.23 – 41.52 Low 315
41.53 – 56.91 2 540
56.92 – 68.45 ED63A100 3 740
68.46 – 76.91 CED63A100 4 890
76.92 – 90.90 High 1000
38.46 – 55.37 Low 500
55.38 – 70.75 2 720
70.76 – 84.60 ED63A125 3 920
84.61 – 96.14 CED63A125 4 1100
96.15 – 113.60 High 1250
30.76 – 35.37 Low 400 35.38 – 39.99 2 460 44.51 – 49.23 FXD63L150 4 580 53.84 – 58.45 CFD63L150 6 700 58.46 – 63.06 7 760 63.07 – 74.50 High 820
61.53 – 69.22 Low 800 69.23 – 76.91 2 900 84.61 – 92.29 FXD63A150 4 1100 100.00 – 108.00 CFD63A150 6 1300 108.00 – 115.00 7 1400 115.00 – 136.00 High 1500
85.00 – 100.00 Low 1100 100.00 – 115.00 2 1300 131.00 – 146.00 FXD63A250 4 1700 162.00 – 177.00 CFD63A250 6 2100
177.00 – 192.00 7 2300
192.00 – 227.00 High 2500
Note: Lowest instantaneous settings have a -20%/+30% tolerance and all
other settings have a -20%/+20% tolerance.
7-74 Siemens Industry, Inc. SPEEDFAX? 2011 Product Catalog
7 MOLDED CASE CIRCUIT BREAKERS
Siemens / Speedfax Previous folio: 6-60
Molded Case Circuit Breakers
Motor Circuits Application
aThe selection of breakers for this table is in accordance with
Article 430, 2005 National Electric Code. Recommended
circuit breakers are for full voltage starting, special
consideration is necessary for reduced voltage starting.
bFor panelboard applications, substitute the BL breaker for
the BQ, ED2 circuit breakers may also be used.
cFor non-interchangeable trip applications, substitute the
FXD6 for the FD6, the JXD6 for the JD6, or the LXD6 for
the LD6.
Breaker Mounted at a Distance From
Motor Starter
ET thermal-magnetic circuit breakers
conform to the National Electrical Code
table 430-52 requirements for motor
branch and feeder circuit protection
when properly applied in conjunction with
motor-running overcurrent protective
devices. The recommended
circuit-breaker ratings in Table 2 provide
adequate time delay for starting the
majority of three phase induction motors.
To determine the ampere ratings of the ET
breaker to protect a motor feeder, add the
rating of the ET breaker used to protect
the largest motor branch circuit in the
group to the full-load currents of the
remaining motors in the group.
Interrupt Ratings
For normal commercial purposes,
available fault current can conveniently
be obtained in the Interrupting
Selector Tables.
Table 2 (When Breaker is Mounted at a Distance From Motor Starter)
3-Phase Induction Type Motors (EQ and ET circuit breakers (thermal-magnetic trip) for branch breaker use with alternating-current combination motor starters).
Motor
200 and 208V Motors 230V Motors 460V Motors 575V Motors
Horse- 240V Circuit Breaker Dataa 240V Circuit Breaker Dataa 480V Circuit Breaker Dataa 600V Circuit Breaker Dataa
power Breaker Catalog Ampere Breaker Catalog Ampere Breaker Catalog Ampere Breaker Catalog Ampere
Rating Type Number Rating Type Number Rating Type Number Rating Type Number Rating
0001
?2 BQ3B015 015 BQ3B015 015 ED43B015 015 ED63B015 015
0003
?4 BQ3B015 015 BQ3B015 015 ED43B015 015 ED63B015 015
001 BQb BQ3B015 015 BQb BQ3B015 015 ED4 ED43B015 015 ED6 ED63B015 015
0011
?2 BQ3B015 015 BQ3B015 015 ED43B015 015 ED63B015 015
002 BQ3B020 020 BQ3B015 015 ED43B015 015 ED63B015 015
003 BQ3B030 030 BQ3B020 020 ED43B015 015 ED63B015 015
005 BQ3B040 040 BQ3B030 030 ED43B015 015 ED63B015 015
0071
?2 BQ3B060 060 BQ3B050 050 ED43B030 030 ED63B020 020
010 BQb BQ3B070 070 BQb BQ3B070 070 ED4 ED43B030 030 ED6 ED63B030 030
015 BQ3B100 100 BQ3B090 090 ED43B040 040 ED63B035 035
020 BQ3B100 100 ED43B050 050 ED63B050 050
025 FXD63B125 125 FXD63B125 125 FXD63B090 090 FXD63B060 060
030 FXD63B150 150 FXD63B150 150 FXD63B100 100 FXD6 FXD63B070 070
040 FXD6 FXD63B175 175 FXD6 FXD63B175 175 FXD6 FXD63B125 125 FXD63B090 090
050 FXD63B200 200 FXD63B200 200 FXD63B150 150 FDX63B100 100
?FXD63B225 225
060 JXD2 JXD23B300 300 — — — FXD6, FD6 FXD63B150 150 FXD6 FXD63B100 100
075 JXD2 JXD23B400 400 JXD2 JXD23B350 350 FXD6, FD6 FXD63B200 200 FXD6, FD6 FXD63B125 125
100 JXD2 JXD23B400 400 JXD2 JXD23B400 400 FD6c FD63B250 250 FXD6, FD6 FD63B175 175 JD6c JD63B250 250
125 LD6c or LD63B600 600 LD6c or LD63B500 or 500 JD6c JD63B300 300 FXD6, FD6 FXD63B200 200
?LMD6 LMD63B600 LMD6 LMD63B500 OR JD6c JD63B200 200
150 LD6c or LD63B600 or 600 LMD6 LD63B600 or 600 JD6c JD63B300 300 FXD6 or FXD63B225 225
?LMD6 LMD63B600 LMD63B600 JD6c JD63B225 225
200 LMD6 LMD63B800 800 LMD6 LMD63B800 800 JD6c JD63B350 350 JD6c JD63B300 300
250 — — — — — — JD6c JD63B400 400 JD6c JD63B400 400
300 — — — — — — LD6c or LD63B600 or 600 JD6c JD63B400 400 LMD6 LMD63B600
350 — — — — — — LMD6 LMD63B700 700 LD6c or LD63B500 or 500 LMD6 LMD63B500
400 — — — — — — LMD6 LMD63B800 800 LD6c or LD63B600 or 600 LMD6 LMD63B600
500 — — — — — — — — — LMD6 LMD63B800 800
? Revised ?
04/15/16
Siemens Industry, Inc. SPEEDFAX? 2011 Product Catalog 7-77
Siemens Industry, Inc. SPEEDFAX? 2011 Product Catalog 7-75
7 CIRCUIT BREAKERS MOLDED CASE
Siemens / Speedfax Previous folio: 6-67 Updated by TA 02/03/11
Molded Case Circuit Breakers
Motor Circuits Application
ETI Trip Setting
Motor Full Catalog AdjustLoad
Amperes Number ment Amperes
95.00 – 110.00 Low 1250 110.00 – 124.00 2 1430 138.00 – 151.00 JXD63L400 4 1790 165.00 – 178.00 CJD63L400 6 2140 178.00 – 192.00 7 2320 192.00 – 227.00 High 2500
154.00 – 176.00 Low 2000 176.00 – 198.00 2 2290 220.00 – 242.00 JXD63H400 4 2860 264.00 – 285.00 CJD63H400 6 3430 285.00 – 308.00 7 3710 308.00 – 326.00 High 4000
155.00 – 176.00 Low 2000
176.00 – 198.00 2 2290
220.00 – 242.00 LXD63L600 4 2860
264.00 – 285.00 CLD63L600 6 3430
285.00 – 308.00 7 3710
308.00 – 326.00 High 4000
231.00 – 264.00 Low 3000
264.00 – 292.00 2 3430
330.00 – 362.00 LXD63H600 4 4290
395.00 – 428.00 CLD63H600 6 5140
428.99 – 462.00 7 5570
462.00 – 490.00 High 6000
215.00 – 238.00 Low 2800
238.00 – 261.00 2 3100
261.00 – 284.00 3 3400
308.00 – 369.00 LMXD63L800 5 4000
369.00 – 423.00 6 4800
423.00 – 462.00 7 5500
462.00 – 490.00 High 6000
246.00 – 269.00 Low 3200
269.00 – 284.00 2 3500
284.00 – 323.00 3 3700
362.00 – 492.00 LMXD63A800 5 4700
492.00 – 562.00 6 6400
562.00 – 616.00 7 7300
616.00 – 660.00 High 8000
231.00 – 264.00 Low 3000
264.00 – 292.00 2 3430
292.00 – 330.00 3 3800
362.00 – 395.00 MXD63L800 5 4710 428.00 – 462.00 CMD63L800 7 5570 462.00 – 490.00 High 6000
308.00 – 352.00 Low 4000 352.00 – 442.00 2 4570 442.00 – 447.00 3 5740 483.00 – 527.00 MXD63A800 5 6280 571.00 – 616.00 CMD63A800 7 7240 616.00 – 660.00 High 8000
385.00 – 440.00 Low 5000 495.00 – 550.00 MXD63H800 3 6430 605.00 – 660.00 CMD63H800 5 7860 660.00 – 695.00 6 8575
General
Protection of Motor Circuits
Molded case circuit breakers are used in
motor circuits as a disconnecting means
and for short-circuit protection. They
should be used in conjunction with
motor-running, over-current-protection
devices, and should permit the motor
to start without nuisance tripping from
motor-inrush current. The circuit breaker
should have a continuous-current rating
of not less than 115% of the motor
full-load current.
The recommended motor circuit
protectors (Siemens ETI instantaneous
only circuit breakers) listed have
continuous-current ratings of at least
115% of motor full-load currents. The
trip-setting positions are approximately
11 times motor full-load currents. The
suggested trip settings may have to be
adjusted upward to no higher than 1300%
of full-load current for non-design E type
motors, and no greater than 1700% of full
load current for design E motors, to allow
for motor start-up due to inrush currents.
Breaker Mounted Immediately Ahead
of Motor Starter
Siemens ETI motor circuit protectors are
recommended for use in combination
motor starters to provide selective
short-circuit protection for the motor
branch circuit. The adjustable
instantaneous-trip feature of the Siemens
ETI motor circuit protector provides for a
trip setting slightly above the peak
motor-inrush current. With this setting,
no delay is introduced in opening the
circuit when a fault occurs. This circuit
breaker has no time-delay trip element.
Therefore it must be used in conjunction
with, and immediately ahead of, the
motor-running overcurrent protective
device.
Important: The information below does
not apply to all motor applications: it
is recommended that the user refer to
the National Electrical Code (NEC) for
specific needs.
Table 1 (When Breaker is Mounted Immediately Ahead of Motor Starter)
3-Phase Induction Type Motors (Siemens ETI motor circuit protectors for branch circuit use with alternating-current combination, full voltage motor starters).
Motor ETI Trip Setting
Full Load Catalog AdjustAmperes
Number ment Amperes
0.69 – 0.91 A (min) 9 1.1 – 1.3 B 15 1.6 – 1.7 C 21 2.0 – 2.2 HEM3M003L D 27 2.3 – 2.5 E 30 2.6 – 2.8 F (max) 33
1.5 – 2.0 A (min) 21 2.6 – 3.1 B 35 3.7 – 3.9 C 49 4.8 – 5.2 HEM3M007L D 63 5.3 – 5.7 E 70 5.8 – 6.1 F (max) 77
3.4 – 4.5 A (min) 45
5.7 – 6.8 B 75
8.0 – 9.1 C 100
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