Siemens TIASTAR Manuel d'instruction - Page 37
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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.
Cont.
Amps
LOW
1
2.6
2
7
3
10
5
16
10
30
25
55
30
80
40
115
50
180
100
315
FXD62A
JXD62H
LXD62H
MXD62A
Siemens Energy & Automation, Inc.
I-T-E Type ETI Setting Positions
2
3
4.5
6
11
15
17
23
26
36
50
70
90
125
135
185
185
255
300
410
540
740
Catalog
Contact
Number
Amps
HEM3M003L
3
HEM3M007L
7
HEM3M015L
15
HEM3M030L
30
HEM3M050L
50
HEM3M070L
70
HEM3M100L
100
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.
Trip Settings Positions
4
7.5
19
30
46
85
155
235
325
520
890
Contact Siemens Sales Office for settings with current limiters.
HEM Setting Positions
NEMA
Starter Size
0
0
0
1
2
2
3
5
6
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Trip Settings Positions
A
B
C
D
9
15
21
27
21
35
49
63
45
75
100
135
90
150
210
270
150
250
350
450
210
350
490
630
300
500
700
900
7
HI
.
9
.
22
.
35
.
54
.
100
.
180
.
270
.
375
.
600
.
1000
E
F
30
33
70
77
150
165
300
330
500
550
700
770
1000
1100
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