APL/UPL Series
“Existing Design-In Only”
APL/UPL
APL/UPL Series
Hydraulic Magnetic Circuit Protectors
INTRODUCTION
IMPORTANT NOTICE:
The APL/UPL is a legacy
product and no new design-in orders are being
accepted. We are also discontinuing the 205 series
(APL with dust proof enclosure). If the specifications
for any of these products are necessary for your
system, Sensata Technologies recommends utilizing
the Airpax™ IAL series.
The APL/UPL magnetic circuit protector provides reliable,
low-cost power switching, circuit protection and circuit
control. The handle opens and closes a circuit, under normal
load conditions, similar to an ON-OFF switch. Upon overload,
the internal mechanism trips, opens the contacts and forcibly
returns the handle to the OFF position. Since the protector is
“trip free,” the internal contacts will not remain closed in the
presence of an overload, even though the handle is held in the
ON position.
The APL/UPL line offers many configurations including series,
shunt and relay with a choice of delays and ratings. APL/UPL
multi-pole assemblies are available with a mix of current ratings,
delays and internal circuit configurations.
While designed for industrial, military and information processing
applications, the APL is suitable for use in any situation where
precision operation is required. Most versions of the APL
family are recognized by UL per UL STD. 1077 as supplementary
protectors and certified by CSA per CSA STD. C22.2–No. 235
as supplementary protectors and are designated with the UPL
prefix.
APL/UPL
Single Pole Toggle
2.020 MAX.
[51.31]
.150
[3.81]
2.530 MAX.
[64.26]
.675
[17.14]
Note: Tolerance ± .015 [.38]
unless noted. Dimensions in
brackets [ ] are millimeters.
MULTI-POLE CIRCUIT PROTECTORS
Multi-pole protectors are combined in an assembly with the
actuating handles linked and the trip mechanisms internally
coupled. A fault in either protected circuit opens all poles
simultaneously. Applications include use in two-phase circuits,
single-phase three-wire systems or in two or more related but
electrically isolated circuits. A mix of delays, ratings and
configurations is possible, with the series type having any of
the auxiliary switches listed. Combinations up to nine poles are
available.
Mounting Details
One Pole
.755
[19.18]
Ø 2X .156
[3.96]
1.448
[36.78]
2.060
[52.32]
MULTI-POLE DIMENSIONS
2 pole “A”
3 pole “A”
4 pole “A”
5 pole “A”
6 pole “A”
7 pole “A”
8 pole “A”
9 pole “A”
1.515 [38.48] max
2.265 [57.53] max
3.015 [76.58] max
3.765 [95.63] max
4.515 [114.68] max
5.265 [133.73] max
6.015 [152.78] max
6.765 [171.83] max
.432
[10.97]
Two Pole
1.530
[38.86]
Ø 4X .156
[3.96]
1.448
[36.78]
2.060
[52.32]
Note: Dimension “A” varies with # of poles
.432
[10.97]
“A”
(SEE TABLE)
.750
[19.05]
Three Pole
2.280
[57.91]
ON
ON
Ø 6X .156
[3.96]
1.448
[36.78]
2.060
[52.32]
.75 ± .015
[19.05 ± .38]
(TYP)
.432
[10.97]
.750
[19.05]
.750
[19.05]
Panel Mounting Tolerances: ±.005 [.13] unless noted.
APL/UPL
APL/UPL CONFIGURATIONS
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 over-current protection, it’s simultaneously used
as an on-off switch.
Auxiliary Switch
(Applies to Series Trip Only)
This is furnished as an integral part of a series pole in
single or multi-pole assemblies. Isolated electrically from
the protector’s circuit, the switch works in unison with
the power contacts and provides indication at a remote
location of the protector’s on-off status.
Auxiliary switch contacts actuate simultaneously with the
main breaker contacts, and will open regardless of whether
the breaker contacts are opened manually or electrically. For
auxiliary switch ratings below 6Vac or 5Vdc, an auxiliary
switch with gold contacts is available. Gold contacts are not
recommended for load current above 100 milliamps.
The contacts on our optional RS auxiliary switch will open
only in the event of an electrical trip of the circuit breaker.
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.
Dual Coil
Dual coil protectors provide remote shut down option and
normal overcurrent protection in the confines of a single
breaker pole. This construction saves space by eliminating the
need for an additional pole for the voltage trip function.
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, relay or dual coil
configurations.
Series Trip (See Note A)
.281 ± .020
(7.14 ± 0.51)
.625 ± .031
(15.88 ± 0.79)
.675 ± .050
(17.15 ± 1.27)
.281 ± .020
(7.14 ± 0.51)
.280
(7.11)
1.940
[49.28]
1.940
(49.28)
LINE
LINE
LOAD
LOAD
( 50 AMP)
(>50 AMP)
Series Trip with Auxiliary Switch
1.290 ± .031
(32.77 ± 0.79)
.280 ± .031
(7.11 ± 0.79)
.295
[7.49]
.187
[4.75]
RS
1.056 ± .031
(26.82 ± 0.79)
.110
[2.79]
REC 4
REG 4
.648 ± .031
(16.46 ± 0.79)
.312
[7.92]
LINE
NC
NO
C
LOAD
BREAKER IN OFF
POSITION
.187
[4.75]
REC 5
REG 5
Shunt, Relay and Dual Coil
.281 ± .020
[7.14 ± 0.51]
.625 ± .031
[15.88 ± 0.79]
.281 ± .020
[7.14 ± 0.51]
.625 ± .031
[15.88 ± 0.79]
1.275 ± .020
[32.38 ± 0.51]
1.940
[49.28]
.667 ± .020
[16.94 ± 0.51]
1.940
[49.28]
.667 ± .020
[16.94 ± 0.51]
Notes:
Tolerance ± .015 [.38] unless noted.
Dimensions in brackets [ ]
are millimeters.
A Terminal sizes: 10-32 THD (<50
AMP), ¼ -28 THD (>50 AMP) Metric
Terminals (Optional),
M5 x 0.8 THD (<50 AMP).
B Minimum useable thread
length: 10-32 THD (.250 on
breakers without terminal
boards, .160 with terminal
boards) ¼ - 28 THD (.200).
LINE
LOAD
V
.
COIL
LINE
LINE
LINE
LOAD
RELAY
COIL
LINE
COIL
LINE
LOAD
LOAD
LOAD
RELAY
COIL
LOAD
COIL
LOAD
SHUNT
TRIP
DUAL
COIL
DUAL
RATING
RELAY
TRIP
DUAL
COIL
NO VOLTAGE
TRIP
APL/UPL
