Ensure that the setting on a magnetic only motor circuit pro-
tector does not exceed the maximum allowable setting as
defined in the 1999 National Electrical Code, section 430-S2
(C)(3).
5.12 Field Testing of the Circuit Breakers
A test can be performed using the procedure outlined in the
following discussion to verify that a circuit breaker trip mecha-
nism is functioning.
1. Wire the three circuit breaker poles in series.
2. Connect the series combination of breaker poles to a vari-
able low voltage high current power source.
3. Gradually increase the current from .0. until the circuit
breaker trips. If the circuit breaker fails to trip when the test
current reaches 150% of the largest trip setting, the trip unit
is not functioning properly and the circuit breaker requires
replacement.
5.13 Overload Relay
For proper overload relay coordination, the cables on the load
side of the overload relay should be sized in accordance with
the tables in Article 310 of the National Electrical Code. The
wire for motors with full load currents of 100 amperes or less
may be selected from the 60°C or 75°C column. Select wire
from the 75°C column when the motor current is greater than
100 amperes. When conditions dictate the use of cables larger
than these, the relay tripping time may be affected. Another
condition which may affect tripping is a long acceleration time
such as that caused by a motor driving a high inertia load. If
either of these conditions exists, consult Siemens for overload
relay application instructions.
I-T-E Type ETI Setting Positions
Cont.
Trip Settings Positions
Amps LOW
2
3
4
5
6 7
HI
1 2.6 4.5 6 7.5 . . . 9
2 7 11 15 19 . . . 22
3 10 17 23 30 . . . 35
5 16 26 36 46 . . . 54
10 30 50 70 85 . . . 100
25 55 90 125 155 . . . 180
30 80 135 185 235 . . . 270
40 115 185 255 325 . . . 375
50 180 300 410 520 . . . 600
100 315 540 740 890 . . . 1000
FXD62A
JXD62H
LXD62H
MXD62A Contact Siemens Sales Office for settings with current limiters.
Siemens Energy & Automation, Inc.
37
HEM Setting Positions
Catalog
Contact
NEMA
Trip Settings Positions
Number
Amps Starter Size
A B C D E F
HEM3M003L
3
0
9 15 21 27 30 33
HEM3M007L
7
0
21 35 49 63 70 77
HEM3M015L
15
0
45 75 100 135 150 165
HEM3M030L
30
1
90 150 210 270 300 330
HEM3M050L
50
2
150 250 350 450 500 550
HEM3M070L
70
2
210 350 490 630 700 770
HEM3M100L
100 3
300 500 700 900 1000 1100
