4.7. Definite Purpose Contactors and Starters. Contents. Reversing/Assignment Contactor. Direct Current Contactors
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1 Direct Current Contactors.7 Contents Description Mill Type Contactors V Contactors DPM 750V Contactor AVD Contactor D Contactor Product Selection Accessories Renewal Parts Technical Data and Specifications Dimensions Page V5-T-67 V5-T-70 V5-T-76 V5-T-79 V5-T-82 V5-T-86 V5-T-86 V5-T-86 V5-T-87 V5-T-87 Product Description The Reversing/Assignment Contactor is a two-pole, double-throw non-load break definite purpose DC contactor. A three-position center-off and a two-position magnetically-latched configuration is available. The device is rated for 1100A, 1000 Vdc. The Reversing Contactor includes cross over busbars for DC motor reversing applications; the Assignment Contactor omits the cross over busbars for motor assignment applications. (See Page V5-T-87.) Application Description The Reversing/Assignment Contactor was designed for the demanding environmental requirements of off highway vehicle applications. This device is also widely utilized with high horsepower DC drives for DC motor reversing and drive assignment applications. Features Bi-directional current carrying capability (nonload break) Can replace four singlepole contactors in DC motor reversing applications Can replace two or four single-pole contactors in DC motor assignment applications Any combination of up to eight isolated NO or NC auxiliary contacts Panel mount design Continuous duty operating coil Screw type or fast-on control terminals Volume 5 Motor Control and Protection CA E September V5-T-85
2 .7 Direct Current Contactors Product Selection When Ordering Contact Technical Resource Center Product specification: The Reversing/assignment contactor is a definite purpose DC contactor Please consult our Technical Resource Center for catalog numbers of other device configurations and application assistance 1000V Contactor Accessories Auxiliary Contacts Contact Configuration Renewal Parts (Three-Position, Center OFF) Auxiliary Contact Device Type Configuration Coil Voltage Catalog Number Reverser 8NO ED615 NO/NC ED ED622 Assignment NO/NC ED ED ED66-6 Terminal Configuration Catalog Number 1NO/1NC Fast-on NO Fast-on NC Fast-on NO/1NC Screw type NO Screw type NC Screw type Contact Kits Device Configuration Catalog Number Reversing/assignment Three-position Reversing/assignment upgrade kit 1 Three-position Magnetic latched reversing/assignment Two-position Note 1 The contact kit will upgrade the three-position, reversing/assignment device from the original design that incorporated a leaf spring contact structure to the present design that incorporates a coil spring contact structure. The contact kit can then be used after the device has been upgraded for subsequent contact replacement. V5-T-86 Volume 5 Motor Control and Protection CA E September
3 Direct Current Contactors.7 Technical Data and Specifications Description Specification Current carrying capability at 55 C 1100A continuous Electrical creepage and clearance distances For 1000 Vdc applications Mechanical life 1 million operations Operating coil voltages (DC) 2, 28, 36, 7, 110, 125, 250 (others available) Operating Coil Characteristics Current Draw at Nominal Coil Voltage Voltage (±7.5% at 20 C) Reversing Contactor Schematic Diagram Dimensions Approximate Dimensions in Inches (mm) Reversing Contactor Catalog Number (98.8) Load Line 2 1/2-13 x 1.0 Mtg. Screws 11.3 (287) 1.25 (31.8) 10.5 (266.7) 6.8 (172.7) 3/8-16 ASA Holes 9.38 (238.3) Width Height Depth The reversing contactor includes the cross over busbars for DC motor reversing applications. The assignment contactor omits the cross over busbars for motor assignment applications (287) 10.5 (266.7) 6.8 (172.7) 5 (20.) Shipping Weight Lbs (kg) Volume 5 Motor Control and Protection CA E September V5-T-87
4 .8 Ratings Ampere Rating of AC Motors Ampere ratings of motors vary somewhat, depending upon the type of motor. The values given below are for drip-proof, Class B insulated (T Frame) where available, 1.15 service factor, NEMA Design B motors. These values represent an average full load motor current which was calculated from the motor performance data published by several motor manufacturers. In the case of high torque squirrel cage motors, the ampere ratings will be at least 10% greater than the values given below. Caution These average ratings could be high or low for a specific motor and therefore heater coil selection on this basis always involves risk. For fully reliable motor protection, select heater coils on the basis of full load current rating as shown on the motor nameplate. Ampere Ratings of Three-Phase, 60 Hz, AC Induction Motor Syn. Speed Current in Amperes hp 1 RPM 200V 230V 380V 2 60V 575V 2200V 1/ / / / / Notes 1 To convert horsepower to kw, multiply horsepower by V 50 Hz. V5-T-88 Volume 5 Motor Control and Protection CA E September
5 Ratings.8 Ampere Ratings of Three-Phase, 60 Hz, AC Induction Motor, continued Syn. Speed Current in Amperes hp 1 RPM 200V 230V 380V 2 60V 575V 2200V 7-1/ Notes 1 To convert horsepower to kw, multiply horsepower by V 50 Hz. Volume 5 Motor Control and Protection CA E September V5-T-89
6 .8 Ratings Ampere Ratings of Three-Phase, 60 Hz, AC Induction Motor, continued Syn. Speed Current in Amperes hp 1 RPM 200V 230V 380V 2 60V 575V 2200V Notes 1 To convert horsepower to kw, multiply horsepower by V 50 Hz. V5-T-90 Volume 5 Motor Control and Protection CA E September
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