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The following uments should be attach to the Vaal University

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The following uments should be attach to the Vaal University Powered By Docstoc
					                                  MEMORANDUM

                                        T192/2009
                    FACULTY OF ENGINEERING AND TECHNOLOGY



Please process the following tender required for the refurbishment of the Electrical Machines and Power
Systems Laboratories in the Department of Power Engineering:

                                              ITEM
ELECTRICAL MACHINES TRAINING PANEL CONTAINING:

Educational Contents                                     Three-phase connections
                                                         Y-Y connection
    Single Phase Transformers                            Y Δ connection
    Polarity test                                        Y -Z connection
    Turns ratio test                                     Δ - Y connection
    Open circuit test                                    Δ - Δ connection
    Short circuit test                                    Δ -Z connection
    Load characteristic tests :
    Resistive load
    Inductive load
    Capacitive load

    Induction Machines                                    DC MACHINES

    Three-phase squirrel-cage induction motor            DC PM motor tests
        tests                                            Connection and rotation direction
    Connection and rotation direction control                control
    Y - Δ start                                          Starting torque test
    Starting torque                                      Torque-speed characteristic test
    PF correction                                        DC shunt motor tests
    No-load test                                             Connection and rotation direction
    Locked-rotor                                             control
    Torque-speed characteristic                          Starting torque test
    Three-phase wound-rotor induction motor              Torque-speed characteristic
        tests                                            DC separately-excited generator tests
    Connection and rotation direction control            Connection and operation
    Starting torque                                      No-load saturation characteristics
    Locked-rotor test                                    Load characteristic
    Torque-speed characteristic                          DC shunt generator
    Single-phase induction motor tests                   Connection and operation
    Split-phase start torque                             No-load characteristic test
    Capacitor start torque                               Load characteristic test
    Torque-speed characteristic test                     DC series motor
    Three-phase synchronous motor (salient-                  Connection and rotation direction
        pole type) tests                                     control
    Connection and rotation direction control            Starting torque test
    Excitation characteristic                            Torque-speed characteristics
    Load characteristic                                  DC series generator load characteristics
    Three-phase synchronous generator                    DC compound motor tests
        (salient-pole type) tests                            Cumulative connection and rotation
    Armature resistance measurement                          direction control
    No-load saturation and short circuit tests               Cumulative-compound motor
                                                                                                          1
      Load characteristic test                            torque-speed characteristics
      Excitation characteristic test                      Differential connection and rotation
                                                          direction control
                                                          Differential-compound motor
                                                          torque-speed characteristics
                                                      DC compound generator tests
                                                      Cumulative connection and operation
                                                          Cumulative-compound generator
                                                          load characteristics
                                                      Differential connection and operation
                                                  Differential-compound generator load
                                                  characteristic test
 Relab Training Station 708/MS                    A training system with the
                                                  following features;

                                                        The Workstation 708/1
 Technical Specifications                            Earth Leakage (Ground Fault) switch
      3∅ 380V plus N output 10A                      Key Switched Output
      220V AC output10A                              Pilot lamps indications for Power On
      12V AC output 2A                               Voltmeter 400V AC/DC
      200VDC 15A                                     Ammeter 15A AC/DC
      Emergency Push Button                          Ammeter 15A AC/DC
      Audio Visual Continuity Tester                 Ammeter 10A


 Motor Starting Kit 708/MS

  Technical Specifications                            The Contactor
           1 three pushbutton module                  The Overload Relay
           2 Auto transformers                        Signalling
           1 4/6A overload relay                      Power On
           1 three indicator lights
           1 switch module                            The Start Signal
           1 AC contactor with ON delay relay         Control of a contactor with a switch
           2 AC contactor with 5 auxiliaries          Control of a contactor with a
           1 Slip ring Controller/sequencer           pushbutton
           1 Slip ring external resistors             Latching control of a contactor
           1 Faceplate Starter/sequencer              Inching
                                                      On-Delay Relay
  1 Faceplate starter external resistors              Starting of Induction Motors
  1 Capacitor Start Module
  See large number of optional extras*                Direct On Line starter
1 Split phase start module                            Star-Delta Starter
1 Set of Leads                                        The Two Speed Motor (Dahlander)
  1 Instruction Manual                                Autotransformer Starting
                                                      The Slipring (Wound Rotor) Starter
                                                      Forward – Reverse
                                                      The DC Face Plate Starter
                                                      DC Injection Braking
                                                      Dynamic Braking.

 Demountable Motors 10100 (Relab
 machines)

 Technical Specifications                             1 DC Stator
                                                      1 Movable brush Holder
      Frame Size 100 Open construction machines       1 Brush Gear holder
      Nominal 0,75kW assemblies                       1 Set Fixing Bolts
                                                                                                 2
   220/380V AC – 180V DC or Safe 48V             3 Slipring brushes
   Extended shafts                               6 Self Aligning Bearings on shafts
   2 Finned Aluminium Frames                     1 Centrifugal Switch Stationary part
   2 Cast Aluminium and precision machined       1 Centrifugal switch rotating part
       bases                                     1 Flexible coupling
   4 Cast Aluminium dead eyes with two part      1 Set of leads
       bearing housing                        1 Manual
   2 Silkscreened and colour coded front
       panels
   1 Armature
   1 Squirrel Cage Rotor
   1 Slip Ring (Wound) Rotor
   1 AC Stator

ReLab Plug & Play Multimotor 10100R           A set of panels fitting on the Relab
                                              Machines to convert into the following;

   DC Shunt Motor                                DC Compound Generator – Short
   DC Shunt Motor with Interpoles                    Shunt
   Speed Control                                 Split Phase Induction Motor
   DC Series Motor                               Capacitor Motor
   DC Series Motor with Interpoles               Capacitor Start- Capacitor Run Motor
   Speed Control                                 Series Wound Universal Motor
   DC Compound Motor – Long Shunt                Universal Motor with Interpoles
   DC Compound – Long Shunt with Interpoles      Repulsion Motor
   DC Compound Motor – Short Shunt            Two Pole Star Connected Motor
   DC Compound – Short Shunt with                DC Series Generator with Ips
      Interpoles (Ips)                           Sep. Excited Series Generator*
   DC Shunt Motor – Separately excited*          Compound Generator
   DC Shunt Generator – Self Excited             DC Compound Generator – Long
                                                     Shunt
                                              Separately Excited Shunt Generators*
The following documents should be
attaché to the tender:
Tax Clearance Certificate
BBBEE Verification Certificate




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