MA 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 reduces 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/ 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 protection of wiring and equipment (and the lack of rework/repair costs). Type and Rated Current UL508 listed CAN/CSA-C22.2 No.14 certified Type Designation MA __ (a) __ (b) __ (c) RT __ (d) (a) = MA - Manual Motor Controller (b) = Rated Current (c) = U - US Housing (d) = Blank - Standard Terminal RT - Ring-tongue Terminal Voltage Rating 480Y/277VAC AIC (Interrupt Capacity) 0.16A-2.5A: 42kA; 4.0A-16A: 14kA; 20A-40A: 10kA Standard Short Circuit Withstand Rating 0.16A-2.5A: 42kA; 4.0A-16A: 14kA (UL/CSA Ratings) Group Short Circuit Ratings (UL/CSA Ratings) see above Typical Life 6000 on/off operations with 2xRC Calibration Temperature 25°C, +0°, -5° (77°F, +0° -9°) Standard Pack and Weight 1/450g (1.0 lb.) Terminal Size Acceptability Top/Bottom: 18-3 AWG Cat. No. FLA Dial Adjustment Markings MA0.16U 15.901U 0.1/ 0.12/0.14/0.16 MA0.25U 15.902U 0.16/0.19/0.22/0.25 MA0.40U 15.903U 0.25/0.30/0.35/0.40 MA0.63U 15.904U 0.40/0.48/0.56/0.63 MA1.0U 15.905U 0.63/0.75/0.87/1.0 MA1.6U 15.906U 1.0/1.2/1.4/1.6 MA2.5U 15.907U 1.6//1.9/2.2/2.5 MA4.0U 15.908U 2.5/3.0/3.5/4.0 MA6.3U 15.909U 4.0/4.8/5.6/6.3 MA10U 15.910U 6.3/7.5/8.7/10 MA16U 15.911U 10/12/14/16 MA20U 15.912U 16/17/18.5/20 MA25U 15.913U 20/21.5/23/25 MA32U 15.914U 25/27/30/32 MA40U 15.915U 32/34/37/40 GROUP SHORT CIRCUIT RATING AT 480VACa (and BCP size) 42kARMS symmetrical (max. 1200A MCCB or RK5) 14kARMS symmetrical (max. 350A MCCB or RK5) 10kARMS symmetrical (max. 350A MCCB or RK5) 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) Through MA2.5U, ampere rated for motor circuits having a fullload-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 (3.2) 3/4 (3.1) 1 (3.6) 2 3/4 (5.6) 11/2 (6.0) 11/2 (5.7) 11/2 (5.2) 3 (4.8) 1 (7.2) 2 2 (7.5) 3 (9.6) 5 (7.6) 2 (13.6) 3 (11.0) 3 (10.6) 5 (15.2) 10 (14.0) 3 (19.2) 5 (17.5) 5 (16.7) 5 (15.2) 10 (14.0) 3 (19.2) 5 (17.5) 71/2 (24.2) 71/2 (22.0) 15 (21.0) 5 (30.4) 71/2 (25.0) 71/2 (24.2) 10 (28.0) 20 (27.0) 5 (30.4) 10 (32.0) 10 (31.0) 10 (28.0) 25 (34.0) (7.8) (3.42) Note: HEA - Horsepower Equivalent Amperes, the nominal amperage assigned to standard motor horsepower ratings in design guide tables such as NFPA-70 Tables 430-148, 430-149, 430-150; 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.) Altech Corp.® • 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908)806-9400 • FAX (908)806-9490 • www.altechcorp.com 26 DIMENSIONS TRIP CHARACTERISTICS MA/U 120 44mm (1.73 in.) 60 40 37.5mm (1.48 in.) 20 25.5mm (1.0 in.) 10 Tripping time t Minutes 7mm (.28 in.) 6 4 2 1 40 20 10 45mm (1.77 in.) 35mm (1.38 in.) 6 4 2 1 Seconds 45mm (1.77 in.) 89.5mm (3.52 in.) 6mm (.24 in.) MA0.16U-MA16U 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 0.6 0.4 Magnetic Trip Nominal 1100% of Rated Current 0.2 0.1 7mm (.28 in.) 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 17.5mm (1.28 in.) 120 30.5mm (1.20 in.) 3mm (.12 in.) 60 40 44mm (1.73 in.) 20 68mm (2.68 in.) MA20U-MA40U 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 3 L2 L1 5 L3 Tripping time t Minutes 10 6 4 2 1 40 20 10 6 4 MA.16 VDE 0660 AC-3 500V 50-60Mz 12A 10A 14A 16A 40°C 20°C 2 1 T1 T2 2 Seconds ABL SURSUM T3 4 0.6 0.4 0.2 6 0.1 52.5mm (2.07 in.) Magnetic Trip Nominal 1100% of Rated Current 11.15 1.5 2 2.3 3 4 5 6 6.9 8 1012 15 12.5 Multiple of Dial Setting (Thermal) Multiple of Rated Current (Magnetic Trip) Rated Current = Max. Dial Setting MA/USA Manual Motor Controller Altech Corp.® • 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908)806-9400 • FAX (908)806-9490 • www.altechcorp.com 27