IAL/IUL/IEL/LEL Series
Magnetic Circuit Protectors
Introduction
Single & Multi-Pole
Rocker, Sealed Toggle
Configurations
Operating Characteristics
Delay Curves
Specifications
Decision Tables
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IAL/IUL/IEL/LEL
IAL/IUL/IEL/LEL Series
Hydraulic Magnetic Circuit Protectors
INTRODUCTION
IAL/IUL/IEL/LEL magnetic circuit protectors provide low-cost
power switching, reliable circuit protection and accurate
circuit control for equipment in the international marketplace.
IAL models are for those applications where the unit’s inherent
attributes are desired, but compliance with the various
standards is not required.
IUL models have been tested and approved in accordance with
UL 1077 requirements for UL recognition.
IEL/LEL models are VDE approved to VDE 0660, part 101. They
meet IEC spacing requirements, mandatory for equipment
which must comply with IEC specifications 601 and 950, and
VDE specifications 0804 and 0805. In addition, the IEL models are
UL recognized to UL 1077 as supplementary protectors and the
LEL models are UL listed under the conditions of UL 489. Both are
CSA certified and CCC Approved. The IEL is CSA certified as a
supplementary protector per CSA C22.2–No. 235.
Airpax™ IAL/IUL/IEL/LEL circuit protectors are available in a
wide variety of configurations, including series, series with
auxiliary switch, shunt and relay with choice of delays and
ratings in DC and/or 50/60Hz or 400Hz versions. Single or multi-
pole versions are available with a variety of pole arrangements
to meet your specifications. Please see the appropriate product
specification table for ratings and limitations.
129
IAL/IUL/IEL/LEL Series - Introduction
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SINGLE POLE, STANDARD STUD TERMINAL
(SEE TABLE)
.281
[7.14]
.140
[3.56]
STUD TERMINAL TYPES
Screw Stud Thread
M6
1/4 -20
(SEE TABLE)
Dimension “A”
.510 ± .045
[12.95 ± 1.14]
.545 ± .045
[13.84 ± 1.14]
.510 ± .045
[12.95 ± 1.14]
.545 ± .045
[13.84 ± 1.14]
Dimension “B”
.652 ± .035
[16.56 ± 0.89]
.687 ± .035
[17.45 ± 0.89]
.652 ± .035
[16.56 ± 0.89]
.687 ± .035
[17.45 ± 0.89]
ON
1.940
[49.28]
.142
[3.61]
OFF
M5
.690
[17.53]
1.859
[47.22]
10-32
Single Pole
2X 6-32 THREAD
.140 [3.56] DEEP
M3 ISO THD. OPTIONAL
.402
[10.21]
.220
[5.59]
Mounting Detail
.755
[19.18]
1.448
[36.78]
2.060
[52.32]
Panel Mounting Detail
Tolerance ±.005 [.13] unless noted.
1.438
[36.53]
2.060
[52.32]
.432
[10.98]
2X ÿ .156
[3.96]
2.490
[63.24]
.750
[19.05]
Screw Terminal
.281
[7.13]
Clip Terminal
.281
[7.13]
ÿ .250 MAX.
[6.35]
Bullet Terminal
.967
[24.57]
1.940
[49.28]
1.940
[49.28]
.142
[3.61]
.375
[9.53]
.392
[9.96]
Notes:
Tolerance ± .015 [.39] unless noted.
Dimensions in brackets [ ] are millimeters.
A Terminal protrusion dimensions are referenced from back of mounting panel.
B Each screw terminal is supplied with a 10-32x.312 [7.92] or M5 x 8mm screw,
flatwasher and external tooth lockwasher.
C Stud terminals are supplied with a flatwasher, external tooth lockwasher
and a 10-32 or M5 hex nut (<=70A) (<=50A for LEL),1/4-20 or M6 hex nut
(>70A)(>50A for LEL).
.592
[15.04]
Bullet terminal receptacle should be .312 ± .001 diameter hole
not less than .250 depth. Contact Airpax for other bullet sizes.
Note: Each outer terminal is supplied with a
flatwasher, tooth lockwasher and a hex nut.
http://airpax.sensata.com/
IAL/IUL/IEL/LEL Series - Single Pole
130
IAL/IUL/IEL/LEL
MULTI-POLE CIRCUIT PROTECTORS
Multi-pole units are combined in an assembly with the trip
mechanisms internally coupled. A fault in any protected circuit
opens all poles simultaneously. Applications include use in
polyphase circuits, single-phase three-wire systems, or in two
or more related but electrically isolated circuits. A mix of
delays, ratings and configurations are offered. The auxiliary
switch is offered with either gold or silver contacts and is
available when a series construction pole is specified.
Two Pole Units
An assembly consisting of two single pole units, having their trip
mechanisms internally coupled, is available with either a single
toggle handle or with a handle per pole. Please see decision
one of the part number decision tables. Individual poles may
vary in ratings, delays and internal configurations. If the poles
are of series construction, an auxiliary switch may be included
in either or both poles, allowing you to mix SELV and hazardous
voltages.
Two Pole
IELH11
IEL11
(SEE TABLE)
.281
[7.14]
.140
[3.56]
.402
[10.21]
.220
[5.59]
(SEE TABLE)
4X 6-32 THREAD
.140 [3.56] DEEP
M3 ISO THD. OPTIONAL
ON
1.940
[49.28]
.142
[3.61]
1.438
[36.53]
2.060
[52.32]
OFF
1.859
[47.22]
.690
[17.53]
2.490
[63.24]
1.515
[38.48]
MAX.
1.515
[38.48]
MAX.
Note:
Tolerance ± .015 [.38] unless noted. Dimensions in
brackets [ ] are millimeters.
Two Pole*
1.530
[38.86]
Two Pole*
M6
1/4 - 20
M5
10 - 32
Screw stud
thread
.510
.545
.510
.545
Dim. ìAî
(± .045)
.652
.687
.652
.687
Dim. ìBî
(± .035)
4X ÿ .156
[3.96]
1.448
[36.78]
2.060
[52.32]
Note:
Each outer terminal is supplied with a flatwasher, tooth lockwasher
and a hex nut.
.432
[10.97]
.750
[19.05]
.750
[19.05]
Panel Mounting Detail
Tolerance ±.005 [.13] unless noted.
Note:
A Terminal protrusion dimensions are referenced from back of mounting panel.
B Each screw terminal is supplied with a 10-32x.312 [7.92] or M5 x 8mm screw, flatwasher and external tooth lockwasher.
C Stud terminals are supplied with a flatwasher, external tooth lockwasher and a 10-32 or M5 hex nut (<=70A), 1/4 -20 or M6 hex nut (>70A).
131
IAL/IUL/IEL/LEL Series - Multi-Pole
http://airpax.sensata.com/
BX STYLE CIRCUIT PROTECTORS
Three Pole and Four Pole Units
The three pole structure consists of three single pole units
assembled with an internal mechanical interlock which
actuates all units simultaneously. The units are available
with either a single toggle handle or with a handle per pole.
Units with four pole construction operate with a minimum
of two center toggle handles or with a handle per pole.
Please see decision one of the part number decision tables.
Mixing of delays, ratings and configurations is available in
each individual pole. The auxiliary switch is offered in any
series trip pole.
Breaker poles are numbered consecutively when viewed
from the terminal side, with the ON position up, starting with
pole #1 on the left side and proceeding to the right.
2.173 MAX.
[55.19]
.387 REF.
[9.84]
.125
[3.17]
The innovative new design of our IAL/IUL/IEL/LEL BX Style
circuit protectors features a flat rocker that will satisfy your
aesthetic needs while guarding against accidental
actuation, providing the highest degree of circuit protection
and quality. Only Airpax offers this new standard in user
interface. Available on a variety of versions with a full range
of agency approvals, the IEL BX style circuit protectors meet
or exceed all current performance specifications, including
interrupting capacities up to 50,000 amperes.
Three Pole
IEL111
Mounting Detail*
1.859
[47.22]
.768
[19.49]
1.395
[35.43]
2.490 MAX.
[63.25]
2.265
[57.53]
MAX.
.750
[19.05]
.750
[19.05]
1.239
[31.47]
Three Pole
IELH111
Mounting Detail*
.314
[7.98]
6-32 THD. MOUNTING
M3 ISO THD. OPTIONAL
.750 MAX.
[19.05]
2.265
[57.53]
MAX.
.750
[19.05]
2.280
[57.91]
ON
I
ON
I
O
OFF
O
.750
[19.05]
OFF
1.660
[42.16]
ACTUATION
ACCESS
HANDLE
(SEE NOTE)
POSITION "OFF"
WITH GUARD
(SIXTH DECISION, G)
HANDLE
POSITION "ON"
WITH GUARD
(SIXTH DECISION, G)
Four Pole
IEL1111
Mounting Detail*
1.530
[38.86]
OPTIONAL
GUARD
(SEE DETAIL ìCî)
ON
I
ON
I
PUSH
TO
RESET
SINGLE POLE
PUSH
TO
RESET
.750
[19.05]
3.015
[76.58]
MAX.
.750
[19.05]
.750
[19.05]
.750
[19.05]
HANDLE
POSITION "OFF"
GUARD WITH NO ACTUATE
OFF FEATURE
(SIXTH DECISION, X)
HANDLE
POSITION "ON"
GUARD WITH NO ACTUATE
OFF FEATURE
(SIXTH DECISION, X)
1.660
[42.16]
1.260
[32.00]
Four Pole
IELH1111
Mounting Detail*
3.030
[76.96]
2X ÿ.156
[3.96]
.200
[5.08]
ON
I
ON
I
O
OFF
O
OFF
Panel Mounting Detail
Mounting Detail Tolerance:
±.005 [.13] unless noted
HANDLE
POSITION "OFF"
WITHOUT GUARD
HANDLE
POSITION "ON"
WITHOUT GUARD
DETAIL "A"
NOTE: ACCESS IS LIMITED TO A DEVICE SMALLER THAN THE
UNDERWRITERS LABORATORY "ARTICULATED PROBE"
DEFINED IN UL-489 FIG. 11.1.7.2.1.
3.015
[76.58]
MAX.
.750
[19.05]
.750
[19.05]
.750
[19.05]
Panel Mounting Detail
Tolerance ±.005 [.13] unless noted.
Note:
Tolerance ± .015 [.39] unless noted. Dimensions in brackets [ ] are millimeters.
*See Single Pole Mounting Detail for Hole Sizes and Locations.
http://airpax.sensata.com/
IAL/IUL/IEL/LEL Series - BX Style
132
IAL/IUL/IEL/LEL
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