DC Loop Contactors, Contactor Lugs and Dynamic Brakes Technical Data
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1 DC Loop Contactors, Contactor Lugs and Dynamic Brakes Technical Data
2 Table of Contents 1370 DC Loop Contactors Catalog Number Explanation Contactor Specifications Approximate ounting Dimensions and Weights Lug Kits Catalog Number Explanation Specifications and Selection Dynamic Brake Resistors Catalog Number Explanation Specifications/Selection Approximate ounting Dimensions Wiring Diagrams Reference aterials For additional information, refer to the following publications: Title Publication Available 1370 DC Loop Contactor and Lug Kit Installation Instructions 1370-IN Dynamic Brake Installation Instructions 1370-IN017 For Allen-Bradley Drives Technical Support: Title Allen-Bradley Drives Technical Support Online at or call -F, 7:00a.m. to 6:00p.m. Central STD time: Publication 1370-TD001A-EN-P
3 1370 DC Loop Contactors The Bulletin 1370 DC Contactors are electromagnetically held contactors specially designed to switch the armature current from the DC drive module to a shunt wound DC motor. When used with the appropriate control logic design, these contactors can disconnect the motor armature from the DC drive module when a stop is initiated or in the event of a power failure. Bulletin 1370 DC Contactors have the following features: The contactors feature a top-wired design with all power connections at the top of the contactor. Contacts - The double break silver cadmium oxide contacts are weld resistant for improved reliability. ovable contacts are wedge shaped, while the stationary contacts have a unique fold back design. On contact opening, this fold back design generates a strong magnetic field which quickly throws the arc off the contact surface. The arc is then cooled and extinguished by the surface of the arc chamber. Coil - The contactor coils are hot pressure molded in thermoset epoxy to protect against mechanical damage and harmful environments. The coil shunt plate is designed to retard the magnetic flux until the voltage applied reaches the pick up voltage. Each coil is provided with an exclusive thermal cutout which is designed to open on excessive currents or misapplied voltages. agnet - The high efficiency magnet has a permanent air gap. Pole face wear cannot affect the air gap and cause magnetic sticking due to residual magnetism. Each magnet lamination is phosphate coated to provide ample resistance to corrosion. Catalog Number Explanation Position D C 56 a b c d a Product Type 1370 DC Component D b Type Description Non-Reversing w/db C c Device Description DC Loop Contactor d Current Rating Amps Publication 1370-TD001A-EN-P 3
4 1370 DC Loop Contactors Contactor Specifications Specification Contactor Rating Contact Rating - N.O. (Armature) Voltage: Full Load Steady State Current: Contact Break Current (at 550V DC motor load): All 56A 110A 180A 280A 56A 110A 180A 280A Contact Rating - N.C. (DB Pole) Voltage: All Contact ake Current (at 550V DC resistive load): 56A 110A 180A 280A Auxiliary Contact Rating Voltage: All Continuous Current (all contactors): Contact Break Current (all contactors): Coil Ratings Voltage: All Operate: 550V DC aximum 56A DC aximum 110A DC aximum 180A DC aximum 280A DC aximum 112A DC aximum 220A DC aximum 360A DC aximum 560A DC aximum 550V DC aximum 112A DC aximum 220A DC aximum 360A DC aximum 560A DC aximum 115V AC, 50/60 Hz 10A AC aximum 6A AC aximum 115V AC, 50/60 Hz Pickup: 75% of Nominal (minimum) Dropout: 55% of Nominal (maximum) Breakdown Voltage All 2,100V RS (all electrical elements to ground) Ambient Operating Temperature All 0 to 65 C (32 to 149 F) ounting Orientation All Vertical, Wall ount Contact Termination Line and Load Terminals for N.O. Contacts: Dynamic Braking Terminals for N.C. Contact: 56A 110A 180A 280A 56A 110A 180A 280A x 25/64 screw, 35 Ib.-in. torque 1/4-28 x 3/8 bolt, 45 Ib.-in. torque 5/ x 1/2 bolt, 150 Ib.-in. torque 1/2-13 stud with nut, 400 Ib.-in. torque x 25/64 screw, 35 Ib.-in. torque 1/4-28 x 3/8 bolt, 45 Ib.-in. torque 5/ x 1/2 bolt, 150 Ib.-in. torque 3/8-24 x 5/8 bolt, 240 Ib.-in. torque Coil Termination All Captive Pressure Plate for 2 - #12 AWG wires maximum Contact aterial All Silver Cadmium Oxide Auxiliary Contact All with Captive Pressure Plate for 2 - #14 AWG wires maximum 4 Publication 1370-TD001A-EN-P
5 1370 DC Loop Contactors Approximate ounting Dimensions and Weights E B D A D J C Current Rating Catalog Dimensions - mm (in.) Weight (Cont. Amps) Power Poles Number A B C D E J kg (lbs.) N.O., 1 - N.C DC (3.56) (6.00) (4.47) 35.0 (1.38) (5.50) 12.7 (0.5) 1.4 (3.0) N.O., 1 - N.C DC (3.94) (6.81) (4.63) 40.1 (1.58) (6.31) 12.7 (0.5) 1.8 (4.0) N.O., 1 - N.C DC (6.13) (10.04) (6.09) 69.8 (2.75) (8.66) 16.3 (0.64) 5.4 (12.0) N.O., 1 - N.C DC (7.00) (11.40) (7.66) 80.3 (3.16) (9.84) 20.0 (0.79) 10.0 (22.0) Publication 1370-TD001A-EN-P 5
6 1370 Lug Kits 1370 Lug Kits provide the required lugs to terminate wires on 1370 DC Loop Contactors. When properly installed, the lugs will provide a secure and gas-resistant termination. The Lug Kit contains (2) DB Lugs and (4) Armature Line and Load Lugs. To install the lugs a Thomas & Betts Corporation Compression Tool, model TB6 or TB6S is required. Catalog Number Explanation Position LG 40 a b c a Product Type 1370 DC Component LG b Device Description Lug Kit c Lug Current Rating ax. otor Amps Publication 1370-TD001A-EN-P
7 1370 Lug Kits Specifications and Selection Rated otor DC Contactor Armature Current (1) Rating A DC A DC Armature Conductor Size (2) mm 2 (AWG) DB Conductor Size (3) mm 2 (AWG) Armature Conductor Crimp Lug Hole Size mm (in.) DB Conductor Crimp Lug Hole Size mm (in.) Lug Kit Catalog Number (8) 8.4 (8) 4.8 (0.19) 4.8 (0.19) 1370-LG (6) 8.4 (8) 4.8 (0.19) 4.8 (0.19) 1370-LG (4) 8.4 (8) 4.8 (0.19) 4.8 (0.19) 1370-LG (4) 8.4 (8) 1370-LG (2) 13.3 (6) 1370-LG (1) 13.3 (6) 1370-LG (1/0) 21.2 (4) 1370-LG (1/0) 21.2 (4) 7.9 (0.31) 7.9 (0.31) 1370-LG (2/0) 33.6 (2) 7.9 (0.31) 7.9 (0.31) 1370-LG (3/0) 33.6 (2) 7.9 (0.31) 7.9 (0.31) 1370-LG (4/0) 33.6 (2) 7.9 (0.31) 7.9 (0.31) 1370-LG (250 C) 42.4 (1) 12.7 (0.5) 9.5 (0.38) 1370-LG (300 C) 53.5 (1/0) 12.7 (0.5) 9.5 (0.38) 1370-LG (350 C) 67.4 (2/0) 12.7 (0.5) 9.5 (0.38) 1370-LG (400 C) 67.4 (2/0) 12.7 (0.5) 9.5 (0.38) 1370-LG (500 C) 85.0 (3/0) 12.7 (0.5) 9.5 (0.38) 1370-LG280 (1) The Rated otor Armature Current is taken directly from the motor nameplate or motor data. The current listed in the table (column 1) is the maximum current allowed for the Armature Conductor Size (column 3) and the DC Contactor Rating (column 2). (2) The armature conductors are sized by multiplying the Rated otor Armature Current by 1.25 as provided for in NEC (1987). The DC lug ratings are determined from NEC Table (1987) for copper conductors, insulation temperature rated at 75 C (167 F) at an ambient temperature of 30 C (86 F). If conditions are other than shown in NEC Table then refer to applicable codes. (3) The dynamic braking (DB) conductors are sized as in Note 2, but at half ampacily due to the short time duration of current flow in these conductors, and has been sized to satisfy NEA Standard ICS Dynamic Braking. If the load inertia is larger than that of the motor, calculations must be made to determine correct conductor sizing and DB resistor wattage per NEA Standard ICS Publication 1370-TD001A-EN-P 7
8 1370 Dynamic Brake Resistors Dynamic Braking is an optional control function which facilitates motor stopping under fault conditions or in response to a Coast/DB Stop. Dynamic braking will not provide a holding brake function and is only effective when the motor is rotating. The resistors are sized for an external inertia equal to two or three times the motor inertia and are suitable for three successive DB stops per hour from maximum speed. A drive must be furnished with a normally closed contactor pole in order to use dynamic braking. Catalog Number Explanation Position DB L 65 a b c d a Product Type 1370 DC Component b Device Description DB Dynamic Brake c Voltage Description H 500V DC L 240V DC d Rating HP - 240V DC HP - 500V DC Publication 1370-TD001A-EN-P
9 1370 Dynamic Brake Resistors Specifications/Selection HP Basic Catalog Number Dimension Drawing Connection Diagram Total Watts Ohms Watts Per Resistor 240V DC otor Armature Voltage DBL61 1 A x DBL62 1 A x DBL63 1 A x DBL64 1 A x DBL65 1 A x DBL66 1 A x DBL67 1 A x DBL68 1 A x DBL69 1 A x DBL70 1 A x DBL71 1 A x DBL72 2 B x DBL73 2 B x DBL74 2 B x DBL75 3 C x DBL76 3 C x 3 500V DC otor Armature Voltage DBH63 1 A x DBH64 1 A x DBH65 1 A x DBH66 1 A x DBH67 1 A x DBH68 1 A x DBH69 2 B x DBH70 2 B x DBH71 2 B x DBH72 2 B x DBH73 2 B x DBH74 2 B x DBH75 3 D x DBH76 3 D x DBH77 3 D x DBH78 3 D x DBH79 2 E x 6 Publication 1370-TD001A-EN-P 9
10 1370 Dynamic Brake Resistors Approximate ounting Dimensions Figure 1 Single Resistor 73.0 (2.88) Dimensions are in millimeters (inches) ounting Slot 9.5 (0.38) (9.25) 12.7 (0.50) (10.25) Brass Flat Washer (Qty. 2) 1/4-28 Through Bolt (8.5) Paper Flat Washer (Qty. 6) Hex Nut (Qty. 2) 1/4-28 Lockwasher (Qty. 2) Shipping Size: 279 x 229 x 127 (11 x 9 x 5) Shipping Weight: 1.13 kg (2.5 lbs.) Figure 2 Two Resistors (5.38) Dimensions are in millimeters (inches) ounting Slot 9.5 (0.38) (9.25) 12.7 (0.50) (10.25) Brass Flat Washer (Qty. 4) 1/4-28 Through Bolt (Qty. 2) (8.5) Paper Flat Washer (Qty. 12) Hex Nut (Qty. 4) 1/4-28 Lockwasher (Qty. 4) Figure 3 Three Resistors Shipping Size: 304 x 279 x 178 (12 x 11 x 7) Shipping Weight: 2.04 kg (4.5 lbs.), 1370-DBH79 is 3.40 kg (7.5 lbs.) (7.88) Dimensions are in millimeters (inches) ounting Slot 9.5 (0.38) (9.25) 12.7 (0.50) (10.25) Brass Flat Washer (Qty. 6) 1/4-28 Through Bolt (Qty. 3) (8.5) Paper Flat Washer (Qty. 18) Hex Nut (Qty. 6) 1/4-28 Lockwasher (Qty. 6) Shipping Size: 304 x 279 x 178 (12 x 11 x 7) Shipping Weight: 2.49 kg (5.5 lbs.) 10 Publication 1370-TD001A-EN-P
11 1370 Dynamic Brake Resistors Wiring Diagrams Diagram A Single Resistor DC otor Armature A1+ A2- Diagram D Three Resistors in Series DC otor Armature A1+ A2- DBR1 DBR1 DBR1 DBR2 A1 DB1 DB2 A2 A1 DB1 DB2 A2 Diagram B Two Resistors in Series DC otor Armature A1+ A2- Diagram E Three Groups in Series of Two Resistors in Parallel DC otor Armature A1+ A2- DBR1 DBR2 DBR1 DBR3 DBR5 DBR2 DBR4 DBR6 A1 DB1 DB2 A2 A1 DB1 DB2 A2 Diagram C Three Resistors in Parallel DC otor Armature A1+ A2- DBR1 DBR2 DBR3 A1 DB1 DB2 A2 Publication 1370-TD001A-EN-P 11
12 Trademarks not belonging to Rockwell Automation are property of their respective companies. Power, Control and Information Solutions Headquarters Americas: Rockwell Automation, 1201 South Second Street, ilwaukee, WI USA, Tel: (1) , Fax: (1) Europe/iddle East/Africa: Rockwell Automation, Vorstlaan/Boulevard du Souverain 36, 1170 Brussels, Belgium, Tel: (32) , Fax: (32) Asia Pacific: Rockwell Automation, Level 14, Core F, Cyberport 3, 100 Cyberport Road, Hong Kong, Tel: (852) , Fax: (852) Publication 1370-TD001A-EN-P October, 2008 Copyright 2008 Rockwell Automation, Inc. All rights reserved. Printed in USA.
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