Eaton Magnum DS Technical Data Manual
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Eaton Magnum DS Technical Data Manual

Metal-enclosed low-voltage switchgear
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See also: Instruction Booklet
Cutler-Hammer
New Information
Mailed to: E, C/32-000B
TD.44A.01.T.E
Technical Data
Effective: May 1998
Magnum DS
Metal-Enclosed
Low-Voltage
Switchgear
Page 1

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Summary of Contents for Eaton Magnum DS

  • Page 1 Technical Data Cutler-Hammer Effective: May 1998 Page 1 Magnum DS New Information Mailed to: E, C/32-000B Metal-Enclosed Low-Voltage Switchgear TD.44A.01.T.E...

  • Page 2: Table Of Contents

    Accessories/Options ... . . 36 Magnum DS Breakers ... . . 3 Unit Substations ....11 Magnum DS Breaker .

  • Page 3: Ratings

    4000 ond each, with a 15-second interval of MDS-850 4000 zero current between the two periods. MDS-C50 5000 Table R5 – Magnum DS Breaker Control Voltages and Currents Control Voltage 24 DC 48 DC 125 DC 120 AC 240 AC Close current (SR), ampere 2.70...

  • Page 4: Sensors And Rating Plugs

    Instantaneous (I) Short delay (S) Ground (G) Ground Alarm only (GA) Every Magnum DS trip unit comes standard with LSI characteristics. Optional ground (G) or ground alarm (GA) may also be provided. These trip units also provide the ability to defeat instantaneous protection.

  • Page 5: Ground Fault Settings

    Magnum DS Technical Data Cutler-Hammer Metal-Enclosed Effective: May 1998 Page 5 Low-Voltage Switchgear Ratings Table R8 – Digitrip Ground Fault Current Pickup Settings Pickup Settings – Ground Fault Currents (Amperes) 0.25 0.35 0.75 1.00 Installed Rating Plug (Amperes) I 1000...

  • Page 6: Digitrip Rms Trip Curves

    Low-Voltage Switchgear Ratings Table R10 – Magnum DS Circuit Breakers with Digitrip RMS 520 Trip Unit Typical Long Delay and Short Delay Time/Phase Current Characteristic Curve (LS) 1. There is a memory effect that can act to shorten the Long Delay. The memory effect comes into play if a current above the long delay pickup value exists for a time and then is cleared by the tripping of a downstream device or the circuit breaker itself.
  • Page 7 Low-Voltage Switchgear Ratings Table R11 – Magnum DS Circuit Breakers with Digitrip RMS 520 Trip Unit Typical Instantaneous Time/Phase Current Characteristic Curve (I) 1. There is a memory effect that can act to shorten the Long Delay. The memory effect comes into play if a current above the long delay pickup value exists for a time and then is cleared by the tripping of a downstream device or the circuit breaker itself.
  • Page 8 Effective: May 1998 Low-Voltage Switchgear Ratings Table R12 – Magnum DS Circuit Breakers with Digitrip RMS 520 Trip Unit Typical Ground Fault Time/Phase Current Characteristic Curve (G) 1. The end of the curve is determined by the interrupting rating of the circuit breaker.

  • Page 9: Ct Metering Accuracies

    Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Effective: May 1998 Page 9 Low-Voltage Switchgear Ratings Table R13 – Metering Type Current Transformers for Mounting in Circuit Breaker Compartments ANSI Meter Accuracy Classification Breaker Frame Rating Ratio Ratio B-0.1 B-0.2 B-0.5 B-0.9 B-1.8...

  • Page 10: Application Standards

    Current Standards 4. Excessively high or low ambient Correction Correction Feet Meters temperatures. Magnum DS circuit breakers meet or exceed all applicable requirements of 6,600 2,000 1.000 1.000 For ambient temperatures exceed- ANSI Standards C37.13, C37.17, C37.50 ing 40°C, and based on a standard...

  • Page 11: Unit Substations

    Transformer kVA – 112.5 through 3750 transition section. For these situations, of transformers eliminates necessity Low-Voltage – 208, 240, 480 or 600 V Magnum DS switchgear is designed to of vaults accommodate close coupling to dry Unit Substations may be indoor or out-...

  • Page 12: Types Of Systems

    Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Page 12 Effective: May 1998 Low-Voltage Switchgear Application Types of Systems A. Simple Radial Simplest and least costly Easy to coordinate B. Primary Selective Radial Similar to simple radial, with added advantage of spare primary incoming cable circuit.

  • Page 13: System Application

    Most Magnum DS Switchgear is fed mary switch or breaker, for mainte- of the associated main breakers. The from power transformers. To facilitate interrupting rating should be at least nance purposes.

  • Page 14: Feeder Breakers

    Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Page 14 Effective: May 1998 Low-Voltage Switchgear Application Feeder Breakers – General Motor Starting Feeder Breakers Group Motor Feeder Breakers Circuit breakers for feeder circuit pro- These breakers are usually electrically Typical loads for such circuits are...

  • Page 15: Ground Fault

    Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Effective: May 1998 Page 15 Low-Voltage Switchgear Application Figure A1. Three-Wire Distribution, Delta Source (Ungrounded) Figure A4. Three-Wire Distribution, Solidly Grounded System Blown Fuse Ground Current Still Flows Through Load Figure A5. From Other Fuses Figure A2.
  • Page 16 If a second ground occurs on able. If the Magnum DS breaker solid- to main breakers may assure good another phase, and exceeds the state tripping system including an ground protection.

  • Page 17: High-Resistance Grounding

    Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Effective: May 1998 Page 17 Low-Voltage Switchgear Application been cleared, the timer will run. It has a High-Resistance Grounding When one phase becomes grounded, range of 2–48 hours. When the timer additional current above the charging...

  • Page 18: Zone Selective Interlocking

    Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Page 18 Effective: May 1998 Low-Voltage Switchgear Application Application note: It may not be possi- Ground Fault During fault conditions, each trip unit ble to precisely locate faults within a that senses the fault sends a restrain- When the sensing circuit detects a conduit.
  • Page 19 Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Effective: May 1998 Page 19 Low-Voltage Switchgear Application 600/347 (Max.) Wye 600/347V (Max.) Wye To Distribution Equipment To Distribution Equipment Control Control Circuit Circuit Pulser Grounding Test Pulser Grounding Test Resistor Resistor Resistor Resistor...

  • Page 20: Ground Fault

    Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Page 20 Effective: May 1998 Low-Voltage Switchgear Application The Following Provides Guidelines for Ground Fault Protection. System Advantages Disadvantages Equipment Available for Protection Main Breaker Tie Breaker Fdr. Breaker Notes Ungrounded Minimum distur- When ground detector...
  • Page 21 Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Effective: May 1998 Page 21 Low-Voltage Switchgear Application Sketch 1 Sketch 2 Sketch 3 SOURCE Jumper Jumper ØA ØB ØC ØN ØA ØB ØC ØN ØA ØB ØC Trip Secondary Trip Secondary Unit Block...
  • Page 22 Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Page 22 Effective: May 1998 Low-Voltage Switchgear Application Sketch 4. 3-Wire Double-Ended Unit Substation Sketch 5. 4-Wire Double-Ended Unit Substation 52-1 52-2 52-2 52-1 52-T Bus # 2 52-T Bus # 2 Bus #1...

  • Page 23: Fault Currents

    Cutler-Hammer Metal-Enclosed Effective: May 1998 Page 23 Low-Voltage Switchgear Application Application of Magnum DS Power Circuit Breakers With Standard Three-Phase Transformers – Fluid Filled and Ventilated Dry Types Transformer Base Secondary Short-Circuit Currents Minimum Size Breakers for Selective (100%) Rating...
  • Page 24 Metal-Enclosed Page 24 Effective: May 1998 Low-Voltage Switchgear Application Application of Magnum DS Power Circuit Breakers With Standard Three-Phase Transformers – Fluid Filled and Ventilated Dry Types, Continued Transformer Base Secondary Short-Circuit Currents Minimum Size Breakers for Selective (100%) Rating...
  • Page 25 Metal-Enclosed Effective: May 1998 Page 25 Low-Voltage Switchgear Application Application of Magnum DS Power Circuit Breakers With Standard Three-Phase Transformers – Fluid Filled and Ventilated Dry Types, Continued Transformer Base Secondary Short-Circuit Currents Minimum Size Breakers for Selective (100%) Rating...

  • Page 26: Breaker Arrangements

    Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Page 26 Effective: May 1998 Low-Voltage Switchgear Application Table A5 – Breaker Arrangements Main Sections Blank Blank Blank Blank Blank Instrument Instrument Instrument Instrument Instrument Main Feeder Blank Blank Main 1600 4000 1600 2000...
  • Page 27 Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Effective: May 1998 Page 27 Low-Voltage Switchgear Application Table A5 – Breaker Arrangements Main Sections Feeder Sections Feeder Blank Feeder Feeder 1600 Instrument 1600 1600 2000 Feeder Blank Feeder 1600 4000 Instrument 2000 5000...
  • Page 28 Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Page 28 Effective: May 1998 Low-Voltage Switchgear Application Table A5 – Breaker Arrangements Tie Sections/Combination Main and Tie Sections Feeder Feeder Blank Feeder Blank 1600 1600 Instrument 1600 Instrument 2000 2000 Feeder Main Main...
  • Page 29 Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Effective: May 1998 Page 29 Low-Voltage Switchgear Application Table A5 – Breaker Arrangements Tie Sections/Combination Main and Tie Sections Blank Feeder Feeder Feeder Feeder Instrument 1600 1600 1600 1600 Feeder Feeder Main 4000 4000...

  • Page 30: Switchgear Section View

    Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Page 30 Effective: May 1998 Low-Voltage Switchgear Application Section View of Typical Structure – Dimensions in Inches (mm) Lifting Plate Metal Enclosed “Shipping Split” Terminal Blocks Optional “top-of-gear” Breaker Lifter 4.10 (104) (2515) (2337) Ground 20.28...

  • Page 31: Floor Plan/Conduit Area

    3 (76) locate the center of gravity for Indoor Magnum DS Switchgear: Vertical ......60 inches (1524 mm) 1.50 (38)

  • Page 32: Heat Loss

    Cutler-Hammer Metal-Enclosed Page 32 Effective: May 1998 Low-Voltage Switchgear Application Table A8 – Heat Loss Data Table A9 – Magnum DS Indoor Switchgear Structure Approximate Weights (less breakers) Estimated Heat Loss Per Breaker (Watts) Width Depth Pounds (Kilograms) MDS-408 MDS-608 22-in.

  • Page 33: Structure

    Heavy Duty Hinge Pins Optional Mechanical Interlock — Available between adjacent breakers. Rear Cover/Doors — In Magnum DS Switchgear standard rear covers with captive hardware are the bolt-on type. They are split into two sections to facil- itate handling during removal and installation.

  • Page 34: Bus

    Stand-Off Insulation System — Bus Ampacities — Vertical and cross Glass reinforced polyester has been bus ratings in Magnum DS are 2000, used on both low- and medium-volt- 3200, 4000, and 5000 amperes. In addi- age switchgear for decades. By com-...

  • Page 35: Wiring

    Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Effective: May 1998 Page 35 Low-Voltage Switchgear Features – Wiring Cable Compartment — The cable com- For applications involving excessive Control Wire — Standard wire is Type partment gives ample room for termi- wiring, or nonstandard terminal SIS insulated stranded copper, extra nating the power cables.

  • Page 36: Instrumentation

    Features – Accessories Features – Instrumentation/ Metering and Options mounted on the Instrument compart- Flexibility — Magnum DS Switchgear ment door or on a the panel of a blank Switchgear Accessories — Standard allows for a variety of metering cell.

  • Page 37: Magnum Ds Breaker

    The De-ion principle is incorporated This means that the energy required to in all Magnum DS circuit breakers. This open the breaker is always prestored makes possible faster arc extinction for following a closing operation.
  • Page 38 Metal-Enclosed Page 38 Effective: May 1998 Low-Voltage Switchgear Features – Breaker Magnum DS Switchgear – Trip Units Trip Functions — Magnum DS trip c. Compartment position switch, 6 or units provide the maximum in flexibil- 12 contact, actuated by movement Digitrip RMS Trip Unit —...
  • Page 39 Magnum DS Cutler-Hammer Metal-Enclosed Effective: May 1998 Page 39 Low-Voltage Switchgear Features Trip Close Control Power Figure F1: Typical Control Diagram for Magnum DS Electrically Operated Breaker INCOM INCOM Neg. Neutral Source Zone Shunt Spring Motor Cell Switch Contacts Power...

  • Page 40: Typical Specification

    (silver-plated) (tin- Removable Element — The removable having one or more individual breaker plated) copper bar mounted on heavy- element shall consist of a Magnum DS or instrument compartments, and a duty supports, and having bolted power circuit breaker equipped with rear compartment for the buses and joints.
  • Page 41 Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Effective: May 1998 Page 41 Low-Voltage Switchgear Typical Specification Each breaker shall be equipped with a It shall be possible to test and verify Factory Assembly and Tests microprocessor-based, true RMS sens- the time and current characteristics The switchgear shall be completely ing trip device.
  • Page 42 Technical Data Cutler-Hammer Page 42 Effective: May 1998 TD.44A.01.T.E...
  • Page 43 Technical Data Cutler-Hammer Effective: May 1998 Page 43 TD.44A.01.T.E...
  • Page 44 Technical Data Magnum DS Cutler-Hammer Metal-Enclosed Page 44 Effective: May 1998 Low-Voltage Switchgear Cutler-Hammer TD.44A.01.T.E Printed in U.S.A.

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