Altech UL508
MA- Series
Three Phase Adjustable Trip
Miniature Circuit Breakers/
Manual Motor Controllers
The MA was designed to handle the high
inrush loads of 3 phase transformers,
power supplies, motors, etc. The MA
protects wiring and equipment from
damage caused by the three major
classes of over-current, yet greatly reduc-
es the number of nuisance trips in high
starting and inrush current circuits.
An IEC device with excellent ratings under
a UL listing at 480Y/277V (including group
ratings) and at 500V under international
standards, the Altech/ABL Sursum MA
provides short and long term cost effective
circuit protection for USA and/or export
applications. The short term advantages
include: (1) adjustable thermal trip allows
finalization of initial designs before
procurement of the load equipment is
complete; (2) snap-on mounting for readily
available, internationally standardized DIN
Rail saves panel layout design time as well
as installation and change labor; (3) large
cage-clamp terminals with screws suitable
to power screwdrivers, simplifies and
speeds wiring; (4) convenient switched
disconnect during factory testing and/or
initial start-up saves time and aggravation.
The key long term advantage is customer
satisfaction and proven over-current pro-
tection of wiring and equipment (and the
lack of rework/repair costs).
UL508 listed
E137938
CAN/CSA-C22.2 No.14 certified
Type Designation
MA
____
(a)
16
__
(b)
U
__
(c)
M
__
(d)
(a)
= MA - Manual Motor Controller
(b)
= Rated Current
(c)
= U - US Housing
= R - US Housing + Ring Tongue
(d)
= M - Part No. Designation
480Y/277VAC
0.16A-2.5A: 42kA; 4.0A-16A: 14kA; 20A-40A: 10kA
Voltage Rating
AIC (Interrupt Capacity)
Standard Short Circuit Withstand Rating
0.16A-2.5A: 42kA; 4.0A-16A: 14kA
(UL/CSA Ratings)
Group Short Circuit Ratings
(UL/CSA Ratings)
Typical Life
Calibration Temperature
Standard Pack and Weight
Terminal Size Acceptability
see above
6000 on/off operations with 2xRC
25°C, +0°, -5° (77°F, +0° -9°)
1/450g (1.0 lb.)
Top/Bottom: 18-3 AWG
Cat. No.
MA016UM
MA025UM
MA040UM
MA063UM
MA1.0UM
MA1.6UM
MA2.5UM
MA4.0UM
MA6.3UM
MA10UM
MA16UM
MA20UM
MA25UM
MA32UM
MA40UM
Rated
Current
0.16A
0.25A
0.40A
0.63A
1.0A
1.6A
2.5A
4.0A
6.3A
10A
16A
20A
25A
32A
40A
FLA Dial
Adjustment
Markings
0.1/ 0.12/0.14/0.16
0.16/0.19/0.22/0.25
0.25/0.30/0.35/0.40
0.40/0.48/0.56/0.63
0.63/0.75/0.87/1.0
1.0/1.2/1.4/1.6
1.6/1.9/2.2/2.5
2.5/3.0/3.5/4.0
4.0/4.8/5.6/6.3
6.3/7.5/8.7/10
10/12/14/16
16/17/18.5/20
20/21.5/23/25
25/27/30/32
32/34/37/40
GROUP SHORT
CIRCUIT RATING
AT 480VAC
a
(and BCP size)
3Ø HORSEPOWER RATINGS AT NOMINAL LINE VOLTAGE
(See Note for HEA Definition)
110-120V
HP (HEA)
200V
HP (HEA)
208V
HP (HEA)
220-240V
HP (HEA)
460-480V
HP (HEA)
42kA
r ms
symmetrical
(max. 1200A
MCCB
or RK5)
14kA
RMS
symmetrical
(max. 350A
MCCB
or RK5)
10kA
RMS
symmetrical
(max. 350A
MCCB
or RK5)
Through MA2.5U, ampere rated for motor circuits having a full-
load-amperage (FLA) not exceeding the MA’s general purpose
rated current (RC, equals maximum dial setting) and a locked
rotor current not exceeding 6 times the MA’s RC.
1/2 (4.0)
3/4 (5.6)
1
2
3
3
5
5
(7.2)
(13.6)
(19.2)
(19.2)
(30.4)
(30.4)
3/4 (3.2)
1
1/2
(6.0)
2
(7.8)
3 (11.0)
5 (17.5)
5 (17.5)
7
1/2
(25.0)
10 (32.0)
3/4
1
1/2
2
3
5
7
1/2
7
1/2
10
(3.1)
(5.7)
(7.5)
(10.6)
(16.7)
(24.2)
(24.2)
(31.0)
1
1
1/2
3
5
5
7
1/2
10
10
(3.6)
(5.2)
(9.6)
(15.2)
(15.2)
(22.0)
(28.0)
(28.0)
2
3
5
10
10
15
20
25
(3.42)
(4.8)
(7.6)
(14.0)
(14.0)
(21.0)
(27.0)
(34.0)
Note:
HEA - Horsepower Equivalent Amperes,
the nominal amperage assigned to standard motor horsepower ratings in design guide tables such as
NFPA-70 Tables 430-248, 430-249, 430-250; UL1077 Table 16.2; CSA - C22.2 No. 235-M89 Tables 44 and 45; CSA-C22.2 No. 14-M91 Table 19, etc.
Multiply HEA values (in parenthesis) by 1.1 if power factor is 90%, and by 1.2 if power factor is 80%.
a The standard-circuit short-circuit rating is 14kA for all types. Group ratings can be used in a standard circuit (e.g., MA1.0U at 42kA), but a higher
standard rating cannot be used in a group circuit (e.g., MA40U at 14kA only in standard circuit.)
44
Altech Corp.
®
• 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908)806-9400 • FAX (908)806-9490 • www.altechcorp.com
DIMENSIONS
44mm (1.73 in.)
37.5mm (1.48 in.)
25.5mm (1.0 in.)
6mm (.24 in.)
7mm
(.28 in.)
Minutes
120
60
40
20
10
6
4
2
1
40
20
10
6
4
2
1
MA016UM-MA16UM
MA 3 Phase Controller
Thermal Overload (B, C, D)
“Must Trip” Current = 115% of Dial Setting
“Must Not Trip” > 1 hr = 105% of Dial Setting
44.5mm (1.75 in.)
89.5mm (3.52 in.)
35mm (1.38 in.)
45mm (1.77 in.)
Tripping time t
Seconds
0.6
0.4
0.2
0.1
Magnetic Trip
Nominal 1100% of Rated Current
7mm (.28 in.)
17.5mm (0.69 in.)
30.5mm
(1.20 in.)
44mm (1.73 in.)
68mm (2.68 in.)
Minutes
1 1.15 1.5
2 2.3 3
4 5 6 6.9 8 10 12
16 19
Multiple of Dial Setting (Thermal)
Multiple of Rated Current (Magnetic Trip)
Rated Current = Max. Dial Setting
120
60
40
20
10
6
4
MA20UM-MA40UM
MA 3 Phase Controller
Thermal Overload (B, C, D)
“Must Trip” Current = 115% of Dial Setting
“Must Not Trip” > 1 hr = 105% of Dial Setting
1
40
20
10
6
4
2
1
O
OFF
O
OFF
O
OFF
Seconds
0.6
0.4
0.2
0.1
Magnetic Trip
Nominal 1100% of Rated Current
52.5mm (2.07 in.)
MA/USA Manual Motor Controller
11.15 1.5
2 2.3
3
4
Multiple of Dial Setting (Thermal)
5 6 6.9 8 1012 15
12.5
Multiple of Rated Current (Magnetic Trip)
Rated Current = Max. Dial Setting
Altech Corp.
®
• 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908)806-9400 • FAX (908)806-9490 • www.altechcorp.com
Altech UL508
45
2
Tripping time t
Altech UL508
V-EA and MA
Manual Motor
Controllers
Accessories
UL508 Listed
Accessories can be factory or field mounted on V-EA and MA manual motor controllers for enhanced
control and monitoring capabilities. Field mounting kits include all necessary parts and instructions.
Accessories can be gang mounted on a single controller (the Auxiliary Switch in the outside
position). The mounting arrangement links the internal latch-pins for the tripping mechanisms,
ensuring simultaneous trips. Handles are linked to simplify manual resetting.
* Reset-Hold Voltage = 0.85 x V
E
; Drop-Out Voltage = 0.2 x V
E
E137938
FA - Shunt Trip
Trip/Coil
Type/
Cat. No.
FA12UM
FA24UM
FA48UM
FA110UM
Standard Pack:
5
Weight:
525 grams (1.16 lb.)
Width:
17.5mm (.689in.)
Voltage
AC or DC
12V
24V
48-72V
110V/220V
Max. Coil
Current
1.3A
0.6A
0.2A
0.25A/0.5A
Approvals
UA - Undervoltage Trip
(not UL listed)
Type/
Cat. No.
UA120UM
UA220UM
Line Voltage
60Hz*
120VAC
220VAC
Reset-Hold Voltage = 0.85 x V
E
Drop-Out Voltage = 0.35 - 0.7 x V
E
Standard Pack:
5
Weight:
750 grams (1.65 lb.)
Width:
17.5mm (.689in.)
For further Busbar information please see our comprehensive
Altech Universal Power Distribution catalog.
H - Auxiliary Switch
Type/
No. of
Cat. No. Contacts
H10UM
H11UM
H12UM
H21UM
1
2
3
3
Contact
Type
1NO
1NO + 1NC
1NO + 2NC
2NO + 1NC
Contact
Rating
Wire
Size
For Use
with:
Approvals
10A / 220V AC
3A / 110V DC or pulsed
1A / 220V DC or pulsed
4mm
2
(12 AWG)
V-EA, MA
Standard Pack:
10
Weight:
450 grams (0.99 lb.)
Width:
9mm (.354in.)
Add-on Neutral Pole
Type/
Cat. No.
N63UM
Rating
0.3-63A/
480Y/277V
Approvals
Standard Pack:
5
Weight:
0.775kg (1.71lb.)
Width:
17.5mm (.689in.)
* Please consult Altech for other voltages and your 50Hz application needs.
46
Altech Corp.
®
• 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908)806-9400 • FAX (908)806-9490 • www.altechcorp.com
Lock-out *
Cat. No. EASS
Prevent inadvertent
resetting of the V-EA or MA
during maintenance.
Fits 1/4” pad lock.
Touch Protector
Cat. No. BS.UL
Cooling Spacer
Cat. No. 15.960
t e mp e r At u r e c o r r e c t io N c u r v e
Ambient Temperature and Adjacent Mounting/Loading Adjustment
(V-EA/MA Ambient Temperature - 25°C to 55°C, Storage Temperature -40°C to 70°C)
160
150
140
130
120
Calibration Temperature
20
%
Ambient Temperature Adjustment
5% of RC for every 10°C (18°F).
Adjacent Mounting Temperature
Adjustment 3% of RC for every
additional pole above 3.
Maximum 20% off RC for a total
of 10 poles or more.*
Rated Current (%)
110
100
90
80
70
60
50
40
-40
-40
-30
-22
-20
-4
-10
14
0
32
10
50
20
68
30
86
40
104
50
122
60
140
70
158
80
176
90 (°C)
194 (°F)
* Cooling spacer (Part #15.960)
between each group of 3 poles
will eliminate these adjustments.
up
to
3p
ole
s
adj
a
cen
tm
oun
ted
10
pol
es
Ambient Temperature
* V-EA and MA can also be locked in the on and off position by simply using a common lead or meter seal, which gets fed through the hole in the handle and a
corresponding hole in the housing.
Altech Corp.
®
• 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908)806-9400 • FAX (908)806-9490 • www.altechcorp.com
Altech UL508
47
ma
or ximum
mo
re, 20%
adj
ace off R
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oun r a t
ted otal
*
off
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