55
Single Pole Circuit Breakers
The AP fully sealed, magnetic circuit
breaker combines power switching
and accurate, reliable circuit
protection with inverse time delays
and trip free features.
Unlike a thermal circuit breaker,
the AP does not change its trip current
over a wide temperature span. In
addition, the AP magnetic circuit
breaker is available in either DC,
50/60Hz or 400Hz versions and with
various delays to match the breaker
to specific application requirements.
One of the most important features
of this breaker is the “trip free” action,
which means the circuit will not
remain closed in the presence of an
overload even though the handle is
held in the ON position. The delay
mechanism senses the fault and the
contacts open.
Waterproof panel integrity is
provided by an “O” ring bushing seal
and a silicon rubber gland within the
bushing/handle assembly.
Typical applications include commu-
nication, navigation and aircraft instru-
mentation, radar and power supplies.
The UP circuit breaker, with UL
recognition and CSA certification,
is essentially the same as the AP in
construction and operating principle.
It is approved for operation at 50
volts DC to 20 amperes, 120 volts
50/60Hz to 15 amperes and 240 volts
50/60Hz to 7.5 amperes. The UP
circuit breaker is available in single
pole units only, due to UL and CSA
creepage specifications and the wide
glass terminals utilized.
SINGLE POLE CIRCUIT BREAKERS
1.562 MAX.
[
39.67
]
22º
11º
.875
22.23
] [
RUBBER “O” RING
LOCK RING
ON-OFF PLATE
(OPTIONAL)
LOCKWASHER
3/8 -32 NEF-2B HEX NUT
[]
.
312
7.92
1.605 MAX.
40.77
[]
[]
[]
.380 MAX.
9.65
.625 MAX.
15.88
[]
[]
.656 MAX.
16.66
OFF
ON
.625 MAX.
15.88
[]
[]
KEYWAY
.060 - .065 WIDE
1.52 - 1.65
.026 - .030 DEEP
.66 - .76
.125
3.18
.325
8.26
.391
9.93
FOR PANEL INTEGRITY,
THIS HOLE MUST BE BLIND
WITH .075 [1.91] MIN. DEPTH
[[
[
[
[
[
Mounting Detail
Panel Mounting Detail: Tolerance for Mtg. ±.005 [.13]
Maximum Panel Thickness: .156 [3.96]
MULTI-POLE CIRCUIT BREAKERS
Multi-Pole Circuit Breakers
56
AP Multi-Pole Combinations
Circuit demands and design ingenuity suggest a limitless number
of special combinations, ranging from a two pole unit with one
series breaker and a simple ON·OFF switch, to a more complex
three pole unit having one series, one shunt and one relay
configuration with auxiliary indicator circuit contacts.
Please contact Airpax for specific part number.
Tw o Pole,AP12
Two of the basic units are combined in a sealed case to provide
protection for dual circuit. A single toggle handle actuates both
internal trip mechanisms. Conversely, an overload in either cir-
cuit trips both simultaneously.
The AP12 consists of two independent series trip breakers,
each available with its own rating and delay characteristics.
This two pole unit can therefore have an unlimited number
of combinations, which makes ordering by a code system
impractical. Thus, if the poles differ, a descriptive drawing
is recommended.
One frequent use of two pole breakers is to interrupt either
or both sides of a power line. Likewise, three pole breakers often
use three identical coils. However, any two or three pole breaker
may have any coil of any delay in any desired combination.
(Unless otherwise specified, we assume the two or three poles
to be all alike.)
All multi-pole units have provisions for a rugged three point
panel mount. Use of 6-32 panel seal screws together with the
bushing mount is recommended to maintain specification
shock and vibration levels.
Note: To lerance ± .031 [.79] Angles: ±5° unless noted. Dimensions in brackets [ ] are millimeters.
A: Threaded inserts exceed seated height of bushing by .005-.015 [.13-.38]
22º
11º
.875
22.23
][
RUBBER “O” RING
LOCK RING
ON-OFF PLATE
(OPTIONAL)
LOCKWASHER
3/8 –32 NEF-2B HEX NUT
[]
.
312
7.92
1.780 MAX.
45.21
[]
[]
[]
.380 MAX.
9.65
.625
MAX.
15.88
NOTE A
[]
[]
OFF
ON
.625
15.88
[]
[]
KEYWAY
.060 - .065 WIDE
1.52 - 1.65
.026 - .030 DEEP
.66 - .76
.875
MAX.
22.23
1.562 MAX.
39.67
[]
[]
.375
9.53
.375
9.53
[]
[
[
.250 6.53
(2 PLACES)
[
[
6-32 THD.
.188 4.78 DEEP
(2 PLACES)
FOR PANEL SEAL INTEGRITY,
THIS HOLE MUST BE BLIND
WITH .075 [1.91] MIN. DEPTH
[
[
[
±.003
.375
±.076
9.53
±.002
.147
.125 3.18
.391 9.93
[
±.051
3.73
[
.625
15.88
±.003
.375
±.076
9.53
[
.325
8.26
[
[
Tw o Pole, AP12,Toggle
Mounting Detail
Panel Mounting Detail: Tolerance for Mtg. ±.005 [.13]
Panel Thickness: .125-.156 [3.18-3.96]
[]
.625
15.88
1.281 MAX.
32.53
[]
[]
.625
15.88
57
Multi-Pole Circuit Breakers
22º
11º
.875
22.23
] [
RUBBER “O” RING
LOCK RING
ON-OFF PLATE
(OPTIONAL)
LOCKWASHER
3/8 –32 NEF-2B HEX NUT
[]
.
312
7.92
1.780 MAX.
45.21
[]
[]
[]
.380 MAX.
9.65
.625
MAX.
15.88
NOTE A
FOR PANEL SEAL INTEGRITY,
THIS HOLE MUST BE BLIND
WITH .075 [1.91] MIN. DEPTH
[
[
[
±.003
.687
±.076
17.45
±.002
.147
.125 3.18
.391 9.93
[
±.051
3.73
[
.625
15.88
±.003
.687
±.076
17.45
[
.325
8.26
[
[
[]
1.937 MAX.
49.20
[]
[]
.625
15.88
.937
23.80
[]
.625
15.88
Three Pole, AP112,Toggle
[]
[]
[]
OFF
ON
.625
15.88
[]
KEYWAY
.060 – .065 WIDE
1.52 – 1.65
.026 – .030 DEEP
.66 – .76
.875
MAX.
22.23
1.562 MAX.
39.67
[]
[]
[]
.250 6.53
(2 PLACES)
[
6-32 THD.
.188 4.78 DEEP
(2 PLACES) .687
17.45
.687
17.45
[
[
[
Three Pole, AP112
Three circuits may be simultaneously protected. One actuating
toggle handle closes all circuits and all poles trip in the presence of
an overload on any circuit. Some typical combinations could be: 3
series poles; 2 series and one shunt; 2 series and one relay; or 3
series with a set of auxiliary contacts. Like the two pole breakers,
each pole may have different ratings and delays.
AP/MIL Circuit Breakers
Type AP-MIL breakers, produced in accordance with MIL-PRF-
39019 and the pertinent specification sheets, are subjected to an
exacting production and test program to maintain their Qualified
Products Listing (QPL). One, two and three pole series trip units,
with or without auxiliary contacts, have been accepted for this
listing. Refer to specification sheets MIL-PRF-39019/1 through 6
for the application government designations.
Mounting Detail
Panel Mounting Detail: Tolerance for Mtg. ±.005 [.13]
Panel Thickness: .125-.156 [3.18-3.96]
CONFIGURATIONS
Configurations
58
[]
6 - 32 x .187 4.75
SCREW
NO. 6 LOCKWASHER
SINGLE POLE
1.780 45.21
MAX.
MULTIPOLE
1.950 49.53
MAX.
DIM. FROM
BACK OF
PANEL.
]
]
]
]
Series Trip
The most popular configuration for magnetic protectors is the
series trip where the sensing coil and contacts are in series with the
load being protected. The handle position conveniently indicates
circuit status. In addition to providing conventional overcurrent
protection, it’s simultaneously used as a power disconnect.
Shunt Trip
The shunt trip is designed for controlling two separate loads with
one assembly. The control is established by providing overload
protection for the critical load. When the current through this
load becomes excessive and reaches the trip point the protector
will open and remove power from both loads simultaneously.
The total current rating of both loads must not exceed the
maximum contact rating.
Relay Trip
This permits the overload sensing coil to be placed in a circuit
which is electrically isolated from the trip contacts. The coil may
be actuated by sensors monitoring pressure, flow, temperature,
speed, etc. Other typical applications include crowbar,
interlock and emergency/rapid shutdown circuitry. Trip may
be accomplished by voltage or current, which must be removed
immediately upon tripping.
Remote Indication,AP1-1R
AP series trip circuit breakers are available with electrically isolated
contacts which are rated at 1/2 ampere, 120 volts AC or 50 volts
DC.These contacts provide SPDT switching action which can be
used to indicate “power-on” and “power-off” conditions or to
actuate lights, alarms or timing devices.
Voltage Trip
Sometimes called “dump circuits” or “panic trip circuits,” these
units make it possible to open main power contacts with lower
power inputs from one or more sources. This configuration is
becoming increasingly more important for sensitive circuitry and
denser packaging in automation systems. Available in series, shunt
or relay configurations.
.438
11.13
[]
Series Trip
AP1-1
AP7-1 (Screw Terminal with Terminal Block)
Shunt Trip
AP1- 3
NCNO
CNC
NO
C
NCNO
CNC
NO
C
Switch with Auxiliary Switch
AP1-1RC (Note A)
Series with Auxiliary Switch
AP1-1R (Note A)
Note: To lerance ± .031 [.79] Angles: ±5° unless noted.
Dimensions in brackets [ ] are millimeters.
A. Main breaker contacts open.
.438
11.13
[]
.130±.010
3.30±.25 .076±.010 DIA.
1.93±.25
] ]
] ]
Relay Trip (Note A)
AP1- 4 (Relay)
[]
6 - 32 x .187 4.75
SCREW AND
NO. 6 LOCKWASHER
FROM BACK OF PANEL TO
END OF TERMINALS
SINGLE POLE 1.750 MAX. 44.45
MULTIPOLE 1.925 MAX. 48.90
[]
[]
AP6-1 (Screw Terminal)
UPI-1 (UL Recognized Series)
*Notes: Instantaneous delays (40, 49, 59, 60, 69, 79) are not compatible with inrush enhancement options and are not recommended for general use.
A. 150% for delays 40, 50 & 60. 135% minimum trip for delays 41, 42, 49, 71, 72 & 79.
B. Military time delays. 71=A, 72=B, 79=C
Delay
40*
41
42
49*
50*
51
52
59*
60*
61
62
64
65
69*
71 (Note B)
72 (Note B)
79 (Note B)*
100%
No Trip
No Trip
No Trip
No Trip
No Trip
No Trip
No Trip
No Trip
No Trip
No Trip
No Trip
No Trip
No Trip
No Trip
No Trip
No Trip
No Trip
125% (Note A)
.035 Max.
.200 - 7
3 - 60
.100 Max.
.035 Max.
.400 - 4
4 - 40
.100 Max.
.035 Max.
.500 - 5
4 - 40
.900 - 10
9 - 60
.100 Max.
.200 - 7
3 - 60
.100 Max.
200%
.025 Max.
.055 - .950
.500 - 9
.050 Max.
.025 Max.
.060 - .600
.600 - 6
.050 Max.
.025 Max.
.070 - .700
.800 - 8
.200 - 1.70
1.15 - 7
.050 Max.
.055 - .950
.500 - 9
.050 Max.
400%
.015 Max.
.010 - .240
.010 - 1.75
.020 Max.
.015 Max.
.010 - .200
.010 - 1.50
.020 Max.
.015 Max.
.020 - .200
.010 - .300
.040 - .500
.110 - 1
.020 Max.
.010 - .240
.010 - 1.75
.020 Max.
800%
.015 Max.
.005 - .080
.005 - .100
.015 Max.
.015 Max.
.005 - .035
.005 - .050
.015 Max.
.015 Max.
.008 - .080
.005 - .080
.012 - .100
.010 - .190
.015 Max.
.005-.080
.005 - .100
.015 Max.
Current Ratings
DC, 50/60, 400Hz
in Amperes
DC Series
Resistance All Delays
Except 40, 50, 60
.050
.100
.250
.500
.750
1.00
2.00
3.00
5.00
7.50
1 0.0
1 5.0
20.0
470 ohms
145 ohms
18.0 ohms
4.30 ohms
1.60 ohms
1.15 ohms
.298 ohms
.130 ohms
.052 ohms
.025 ohms
.016 ohms
.006 ohms
.005 ohms
105 ohms
27.0 ohms
3.80 ohms
1.00 ohms
.400 ohms
.230 ohms
.060 ohms
.033 ohms
.012 ohms
.007 ohms
.006 ohms
.005 ohms
.004 ohms
Note: Tolerance at ±25% values based on V-A method after 1 hour stabilization at 100%
rated current. Consult factory for other limits.
DC Series
Resistance
Delays 40, 50, 60
4 Times Rated Current (60Hz)
6.5 Times Rated Current (60Hz)
10 Times Rated Current (60Hz)
13 Times Rated Current (60Hz)
14 Times Rated Current (400Hz)
20 Times Rated Current (400Hz)
6 Times Rated Current (60Hz)
8 Times Rated Current (60Hz)
Delay Peak Amplitude
61, 62, 71, 72, A, B
61F, 62F, 71F, 72F
64, 65
64F, 65F
41, 42, AF, BF
41F, 42F
51, 52
51F, 52F, AF, BF
OPERATING CHARACTERISTICS
59
Operating Characteristics
Inrush Pulse Tolerance
The following table provides a comparison of inrush
pulse tolerance with and without the inertial delay
feature for each of the 50/60Hz delays. Pulse tolerance
is defined as a single pulse of half sine wave peak
current amplitude of 8 milli-seconds duration that
will not trip the circuit breaker.
Nominal Values of Series Resistance at +25° C
Percentage of Rated Current vs.Trip Time in Seconds at 25°C in Vertical Mtg. Position
DELAY CURVES
Delay Curves
60
Typical Delay Curves
The delay curves below illustrate our standard instant, short
and long delays. Please consult factory for specific delay curves
or refer to table on page 59.
Delay curves 64 and 65 illustrate the improved inrush
tolerance provided compared to standard delays. Not available
in MIL configurations.
All trip times and trip currents are specified with the breaker
mounted in the normal vertical position at ambient temperature
of 25°C. For time delay test and measurement purposes, the
breakers should not carry current prior to application of overload.
10000
1000
100
10
1
.1
.01
.001 0 100 150 200 300 400 500 600 700 800 900 1000
PERCENT OF RATED CURRENT
125
TIME IN SECONDS
INSTANT
MAY TRIP
MAY TRIP
10000
1000
100
10
1
.1
.01
.001 0 100 150 200 300 400 500 600 700 800 900 1000
PERCENT OF RATED CURRENT
135
TIME IN SECONDS
SHORT
MAY TRIP
MAY TRIP
10000
1000
100
10
1
.1
.01
.001 0 100 150 200 300 400 500 600 700 800 900 1000
PERCENT OF RATED CURRENT
135
TIME IN SECONDS
LONG
MAY TRIP
10000
1000
100
10
1
.1
.01
.001 0 100 150 200 300 400 500 600 700 800 900 1000
PERCENT OF RATED CURRENT
125
TIME IN SECONDS
DELAY 64
MAY TRIP
MAY TRIP
10000
1000
100
10
1
.1
.01
.001 0 100 150 200 300 400 500 600 700 800 900 1000
PERCENT OF RATED CURRENT
125
TIME IN SECONDS
DELAY 65
MAY TRIP
MAY TRIP
SPECIFICATIONS
Case Seal
The breaker is fully sealed and will not show evidence of leakage
under total immersion. Meets requirements of MIL-PRF-39019.
Panel Seal
The “O” ring provides, with the other illustrated hardware, a seal
against a pressure differential of 15 psi applied for an hour.
Lever Strength
The operating lever or its seal will not be damaged by a 10 lb.
force applied in any direction.
Shock
All breakers withstand 100G without tripping, even while
carrying full rated current with shock applied in any plane
of 6 ms duration. Test is made according to Method 213, Test
Condition I or MIL-Std-202 as outlined in Paragraph 4.6.14
of MIL-PRF-39019. Delay 40, 50 and 60 breakers are tested
at 80% of rated current.
Vibration
All breakers withstand vibration from 10 to 55 cycles at .06
double amplitude and 55 to 2000 cycles at 10G, applied in
any plane, without damage and without tripping even while
operating at full rated current. Test is made in accordance
with Method 204A, Test Condition C, of MIL-Std-202 as
outlined in Paragraph 4.6.12 of MIL-PRF-39019. Delay 40,
50 and 60 breakers are tested at 80% of rated current.
61
Specifications
Trip Free
AP circuit breakers will trip open on overload, even when
forcibly held ON. This prevents the operator from damaging
the circuit by holding the handle in the ON position.
Trip Indication
The operating handle of the breaker moves forcibly and
positively to the OFF position on overload. It is not necessary
to manually “reset” to full “OFF” in order to turn it on again.
Ambient Operation
The breaker will operate at any ambient between -40° C and
+100° C, when tested in accordance with the requirements
of MIL-PRF-39019.
Insulation Resistance
Exceeds 100 megohms at a potential of 100Vdc.
Dielectric Strength
The breaker will withstand 1250 volts RMS, 60Hz from
terminals to case and between the terminals when open.
Endurance
With the circuit breaker operated as an ON-OFF switch,
operating life exceeds 10,000 operations at a rate of 6 per
minute when tested as follows: 6000 OPS @ rated current
plus 4000 OPS @ no load.
Ratings
AP breakers are available in current ratings from 50
milliamperes to 20 amperes, 50 volts DC or 240 volts AC
maximum, 60 or 400Hz. Please consult factory for ratings
other than those noted.
Short Circuit Capacity
When tested in accordance with the procedures of UL1077,
AP breakers have a short circuit capacity of 1000 amperes at
32Vdc, 120Vac, 240Vac, 60 or 400Hz. Parts are recognized to
UL1077 for type UP1 only. The rated Rupture Capacity per
MIL-PRF-39019 is 500 amperes, 50 volts DC, 500 amperes,
120 volts AC and 300 amperes, 240 volts AC, 60 or 400Hz.
Approximate Weight Per Pole
Ounces
1.8
Grams
49
Recommended Torque Specifications
6-32 Mounting Inserts
6-32 Screw Terminals
‹/• - 32 Mounting Bushing
6-8 Inch Pounds
6-8 Inch Pounds
20-25 Inch Pounds
Auxiliary Switch Rating
0.5 AMP @ 120Vac 50Vdc
DECISION TABLES
How to Order
The ordering code for AP magnetic circuit breakers may be
determined by following the steps in the decision tables
shown here.
For example, the following is the code for a two pole AP,
hook terminal, series unit, designed for operation in a DC
circuit. It has a short time delay and a rating of 20 amperes.
The coding given permits a descriptive part number, with
limitations. In the illustrated double pole example
(AP12-1-51-203), it is automatically assumed that both poles
are identical. One great virtue of magnetic circuit breakers is
their adaptability to complex circuits, thus variations from pole
to pole become the rule rather than the exception. Descriptive
drawings are recommended. In this event, factory assigned part
numbers are utilized.
To determine the ordering number for your particular
AP unit, simply follow the steps shown. You may use this
number to place a order or as a reference for further
questions you may have.
Notes:
AThe UP has a wide glass terminal to meet UL and CSA
creepage specifications. Except as completely non-standard,
there is no space for more than two terminals and the UP
is therefore limited to only the single pole series circuit
configuration (Third Decision Table – 1). Delays available
in the UP are: 40, 50 and 60; 41, 51 and 61; 42, 52 and 62;
64 and 65.
BUsers should refer to the applicable drawings of
MIL-PRF-39019. Configurations vary dependent upon
the revision of MIL-PRF-39019. The 6-32 threaded
mounted bushings, useful for added strength, are approved
under this specification.
To assure that proper parts are received, consult the factory
for application assistance if there is any doubt about which
version is correct for the application concerned.
CScrew terminals are available and are equipped with standard
terminal block (see page 58). Space permits their use only in
the series configuration (Third Decision Table ). Standard
terminals are heavy copper hooks.
DScrew terminals with SPDT auxiliary switch, available only
with the series circuit, may have “R” soldering terminals, flat-
tened and pierced, or “RC” soldering terminals which are
cane hooks. Screw terminals (-7, -17, -117) are available
with SPDT auxiliary switch “R” type only.
EThe nominal current values for 100% of rated current
(see delay curves) are those listed. Other values can be
readily supplied, in general, without delayed delivery.
For values above or below the listed range, please consult
an Airpax sales office or sales representative. For UP
maximum ratings see page 55.
FConsult factory for assigned part numbers.
Decision Tables
62
63
Decision Tables
First Decision
Type
1
Second Decision (Note C)
Single pole unit,
mounted with
‹/• threaded bushing
Tw o pole unit,
bushing plus (2) 6-32
threaded inserts
Three pole unit,
bushing plus (2)
6-32 threaded units
1
12
112
7
17
117
2
Poles
Hook
Terminals
Screw
Terminals
Third Decision
3
Internal Configuration
Multi-pole units with mixed construction, poles numbered left
to right when viewed from terminal end (Note F).
-0
-1
-1R
(Note D)
-1RC
(Note D)
-3
-4
Switch Only
(Omit 4th and 5th Decisions)
Series
Series with Auxiliary Switch
with pierced pin terminals
Series with Auxiliary Switch
with cane hook terminals
Shunt
Relay (5 amps max coil rating)
Fourth Decision
4
Hz and Delay
-40
-41
-42
-49
-50
-51
-52
-59
-60
-61
-62
-64
-65
-69
-71
-72
-79
400Hz 150% instant trip*
400Hz short time delay
400Hz long time delay
400Hz 135% instant trip*
DC 150% instant trip*
DC short time delay
DC long time delay
DC 125% instant trip*
50/60Hz 150% instant trip*
50/60Hz short time delay
50/60Hz long time delay
50/60Hz high pulse,
short time delay (50/60Hz only)
50/60Hz high pulse,
long time delay (50/60Hz only)
50/60Hz 125% instant trip*
DC, 50/60Hz,
400Hz short time delay 135% trip
DC, 50/60Hz,
400Hz long time delay 135% trip
DC, 50/60Hz,
400Hz instant time delay 135% trip*
For addition of inertial delay, add an “F” to any delay
number. Except 40, 50 & 60.
*Instantaneous delays are not compatible with
inrush enhancement options and are not recommended
for general use.
Fifth Decision (Note E)
5
Nominal Amperage Rating
Code
-101
-251
-501
-751
-102
-252
-502
-752
-103
-153
-203
Amperes
.100
.250
.500
.750
1.000
2.500
5.000
7.500
10.000
15.000
20.000
See page 9 for maximum voltage ratings.
Note: Standard current ratings listed.
For other ratings, please consult the factory.
1234 5
AP12 - 1 - 51 - 203
Fully sealed magnetic
circuit breaker
Underwriters' Laboratories
recognized circuit breaker
/1 through /6 QPL per
MIL-PRF-39019
AP
UP
(Note A)
AP - MIL
(Note B)
Example:
