<p> APPENDIX B: SCHEDULES A & B</p><p>SCHEDULE A: PARTICULARS OF EMPLOYERS REQUIREMENTS SCHEDULE B: GUARANTEES AND TECHNICAL PARTICULARS OF PLANT AND MATERIAL OFFERED BY THE CONTRACTOR</p><p>Important Notes: i. Where there is insufficient space provided in Schedule B, particulars must be furnished on a separate sheet marked with the number of the Schedule A and item referred to. ii. Where the Contractor does not comply with the Employer’s requirements in the Works Info or Schedules A&B, these deviations must be clearly stated in the deviation list or Schedule B where applicable. iii. Filling in of Schedule B is compulsory for the Contractor. Failure to do so will eliminate tenderer from the evaluation process.</p><p>DESCRIPTION Schedule A Schedule B</p><p>EXTERNAL PLANT CONDITIONS (Section 1 does not need to be filled in by the Contractor) NORMAL SYSTEM CONDITIONS (Extremes of these parameters can occur simultaneously) I. Voltage range V 95 to 105 XXXXXXXXXXXX II. Frequency range % 98 to 102 XXXXXXXXXXXX III. Voltage imbalance – Negative sequence voltage as % 2 XXXXXXXXXXXX a percentage of normal positive sequence voltage IV. Wave form - maximum amplitude deviation from % 5 XXXXXXXXXXXX sine wave</p><p>SUSTAINED ABNORMAL SYSTEM CONDITIONS (Up to six hours unless otherwise indicated) I. Voltage range % 90 to 110 XXXXXXXXXXXX II. Voltage depressions per unit (for up to ten % 75 XXXXXXXXXXXX seconds) III. Frequency range (continuous) % 95 to 105 XXXXXXXXXXXX IV. Voltage imbalance - Negative sequence voltage as % 3 XXXXXXXXXXXX a percentage of normal positive sequence voltage</p><p>220VDC NORMAL SUPPLY CONDITIONS I. Voltage range % 85 to 115 XXXXXXXXXXXX II. Maximum r.m.s. ripple voltage % 2,5 XXXXXXXXXXXX III. DC earthing High resistance, XXXXXXXXXXXX centre point</p><p>FLOOR REQUIRMENTS</p><p>CABLE OPENINGS DESCRIPTION Schedule A Schedule B</p><p> a) Dimensions of cable openings required for mm excitation panels b) Number of cable openings required</p><p>FLOOR LOADING a) Mass of completed excitation panels kg</p><p> b) Mass of completed excitation transformer assembly kg</p><p>PANEL DESIGN AND CONSTRUCTION</p><p>GENERAL a) Manufacturer of panels</p><p>SIZE OF EXCITATION PANELS a) Length mm</p><p> b) Width mm</p><p> c) Height (including base frame) mm</p><p>SIZE OF EXCITATION TRANSFORMER CUBICLE/ASSEMBLY d) Length mm</p><p> e) Width mm</p><p> f) Height (including base frame) mm</p><p>SPACE ALLOCATED FOR PLACING EXCITATION PANELS a) Length mm 4700</p><p> b) Width mm 850</p><p>SPACE ALLOCATED FOR PLACING THE EXCITATION TRANSFORMER ASSEMBLY c) Length mm 3600</p><p> d) Width mm 1300</p><p>MINIMUM MATERIAL THICKNESS a) Base plates mm 5</p><p> b) Gland plates mm 5 DESCRIPTION Schedule A Schedule B</p><p> c) Supporting structures mm 2.5</p><p> d) Cover plates mm 2.5</p><p> e) Removable covers mm 2.5</p><p> f) Doors mm 2.5</p><p> g) Equipment mounting panels (Chassis plate) mm 2.5</p><p>PANEL ACCESS a) Front panel access Yes, doors</p><p> b) Rear panel access Yes, doors and bolt on panels c) Excitation panels cable entry Bottom</p><p> d) Excitation transformer cubicles cable entry Top</p><p>COMPARTMENT SEPARATION a) Separate switching devices compartment Yes</p><p> b) Separate control electronics compartment Yes</p><p> c) Excitation transformer phase separation Yes</p><p> d) Access restriction to live parts when doors are open Transparent polycarbon barriers</p><p>PANEL DOORS a) Door locking mechanism Pad-lockable lever</p><p> a) Minimum latching points (Doors >800mm) 4</p><p> b) Minimum hinges 4</p><p> c) Door over-swing protection Yes</p><p> d) Door reinforcement required Yes</p><p>CORROSION PROTECTION & FINISHING a) External colour RAL1015 or RAL7035</p><p> b) Surface finish Epoxy powder coated, textured c) Internal mounting plates/chassis plates colour White, high gloss</p><p> d) Surface finish Epoxy powder coated</p><p> e) Framework/support structures Galvanised or alloy cold rolled zinc steel f) Gland plates Corrosion resistant & unpainted</p><p>MINUMUM DEGREE OF ENCLOSURE PROTECTION (TO IEC 60529) a) Excitation cubicles IP54CH DESCRIPTION Schedule A Schedule B</p><p> b) Excitation transformer cubicles IP24</p><p>EARTHING</p><p>PANEL MAIN PE CONDUCTOR a) Connections Bolted</p><p> b) Earth conductor position Rear of panel</p><p> c) Earth conductor material Solid Copper</p><p> d) Min earth conductor size mm² 150</p><p> e) Earth conductor rated short-time fault withstand s 3 time</p><p>METAL COMPONENTS/FRAMES a) Connections Lugged, Non-daisy chained b) Material Stranded copper</p><p> c) Colour coding Green & Yellow</p><p> d) Min material thickness mm² 2.5</p><p>DOORS a) Connections Stud/bolted connections b) Material Braided copper straps</p><p>EXCITATION CONTROL SYSTEM</p><p>GENERAL a) Manufacturer</p><p> b) Model number</p><p> a) Type Digital</p><p> b) Configuration Fully redundant dual channel. (AVR, ARPR and field current control per channel) c) Test mode Open loop, user selectable</p><p>COMMUNICATIONS PROTOCOL TO EMPLOYER’S SCADA a) Protocol: First option (Most preferred) IEC 60870-5-104 DESCRIPTION Schedule A Schedule B</p><p> b) Protocol: Second option IEC 61850 </p><p> c) Protocol: Third option OPC</p><p> d) Time synchronisation NTP/SNTP</p><p> e) Time synchronisation method External GPS clock (Provided by Employer)</p><p>PERFORMANCE INDEX a) Transient gain pu 20 </p><p> b) Nominal response s-1 2</p><p> c) Voltage over shoot (@10% step) %  30 of step size</p><p> d) Rise time (From 10%Ugn to 90%Ugn) ms < 300</p><p> e) Maximum voltage reached after disconnection from %  120 of Ugn grid at rated field current. f) Minimum stator voltage at which rated excitation % 50 Ugn field current can be maintained</p><p> o g) Positive ceiling voltage (α=15 , Ugen=80%) pu 1.6 Ufn (Gen Mode)</p><p> h) Channel changeover steady state deviation %  0.5 Ugn</p><p> i) Voltage control accuracy (AVR Mode) % Within 0.5 of Ugn</p><p> j) Open loop regulator accuracy (FCR mode) % Within 1 of Ifn</p><p>VOLTAGE CONTROL LIMITS a) Upper limit % Ugn +10</p><p> b) Lower limit % Ugn – 10</p><p>FIELD CURRENT CONTROL LIMITS a) Upper limit % 110 of Ifn</p><p> b) Lower limit % 0 of Ifn</p><p>STEP FUNCTION a) Amplitude (adjustable) % 0.05 to 30 of Ugn or Ifn b) Resolution % 0.1 of Ugn or Ifn</p><p>FREQUENCY SWEEP FUNCTION a) Amplitude (adjustable) % 0.05 to 30 Ugn</p><p> b) Resolution % 0.1 of Ugn DESCRIPTION Schedule A Schedule B</p><p> c) Frequency range Hz 0.1 to 4 </p><p> d) Frequency resolution Hz 0.01</p><p>OVER EXCITATION LIMITER a) Operating mode Fixed time or I2t curve - User selectable b) Max ceiling value adjustable pu 0.85 to 2.2 of Ifn </p><p> c) Thermal value adjustable pu 0.85 to 1.1 of Ifn</p><p>STATOR CURRENT LIMITER a) Operating mode pu I2t curve </p><p> b) Operating in capacitive or inductive region Selectable (either or both)</p><p>FLUX LIMITER a) Operating value pu 1 to 1.25</p><p> b) Time to operate s 0 to 30 </p><p> c) Operating mode Fixed time or I2t curve - User selectable</p><p>UNDER EXCITATION LIMITER a) Reactive power offset range pu 0 to –1 Sn</p><p> b) Limiting incline deg 20 to 90</p><p> c) Resolution deg 1</p><p> d) External reactance pu 0 to 1 in steps of 0.01</p><p> e) Resolution of Q setting when limiter is Q(P) pu 0.01</p><p> f) If the UEL is a Q(P) limiter then at least 4 points be pu |P|: 0 to 1 available for setting the characteristic in both import Q: -1 to 0 and export quadrants and must operate in both gen and pump modes.</p><p>MINIMUM FIELD CURRENT LIMITER a) Settable range pu 0 to 0.5 of Ifn</p><p> b) Time to operate Instantaneous</p><p>SOFT START FUNCTION a) Time to reach pre-set s 0 to 60</p><p> b) Resolution s 0.1 DESCRIPTION Schedule A Schedule B</p><p>EXCITER FIELD WINDING OVER VOLTAGE PROTECTION a) Positive bar Yes</p><p> b) Negative bar Yes</p><p>DC SHORT CIRCUIT PROTECTION a) Range pu 0 to 5 Ifn</p><p> b) Resolution pu 0.01</p><p>POWER SYSTEM STABILISER (PSS) a) Damping ratio local mode >0.1</p><p> b) Frequency operating range Hz 0.2 to 4</p><p> c) Active power switch-on level pu 0 to 1.0 Sn</p><p> d) Active power switch-on time delay s 0 to 10 </p><p> e) Timer resolution s 0.1</p><p> f) Active power switch-off level pu 0 to 1.0 Sn</p><p> g) Active power switch-off time delay s 0 to 10 </p><p> h) Stator voltage switch off (low level) % 100 to 85 of Ugn</p><p> i) Stator voltage switch off (upper level) % 100 to 110 of Ugn</p><p> j) PSS switch-off time delay due to PSS output out of s 0 to 10 bounds k) PSS switch-on time delay due to PSS output s 0 to 10 recovery l) PSS output Low limit % 0 to 10 of Ugn</p><p> m) PSS output Upper limit % 0 to 10 of Ugn</p><p>CONVERTOR OPTIONS a) Model number</p><p> b) Type 6 pulse, full wave, thyristor controlled c) Redundancy 1+1 or N-1</p><p> d) Continuous rating of one converter at ambient of A 35oC</p><p>DC FIELD BREAKER</p><p> a) Number of main poles 1 or 2</p><p> b) Coil nominal operating voltage (DC) V 220 DESCRIPTION Schedule A Schedule B</p><p> c) Coil operating voltage min range (trip and close) % 80 of Un</p><p> d) Normally open auxiliary contacts for use other than 4 potential free by the ECS e) Normally closed auxiliary contacts for use other 4 potential free than by the ECS f) Number of mechanical operations ≥10000</p><p> g) Operating counter Mechanical 5 digit non resettable h) Trip coils 2</p><p> i) Time to block breaker operation switch from s 5-30 opening to closing</p><p>FIELD FLASHING</p><p>AC FIELD FLASHING SUPPLY a) Nominal voltage V 400</p><p> b) Voltage range % ±5</p><p> c) Supply VA requirement VA</p><p>DC FIELD FLASHING SUPPLY a) Nominal voltage V 220</p><p> b) Supply VA requirement VA</p><p>FIELD SUPPRESSION</p><p> a) Overlapping time ms 2-15</p><p> b) Nominal voltage V 400</p><p>RECORDING DEVICES</p><p>EVENT RECORDER a) Minimum number of stored events 255</p><p> b) Sampling rate minimum cycle time of processing system (3ms typically) c) Type of event display All internal signals causing a trip, channel change over or any alarm state</p><p>TRANSIENT RECORDER a) Minimum digital quantities 16 DESCRIPTION Schedule A Schedule B</p><p> b) Contact voltage 24V to 250 VDC or potential free on at least 8 inputs for external signals c) Minimum analogue quantities 6</p><p> d) Sampling rate for non-instantaneous signals (i.e. ms 5 voltage converted to DC value) e) Minimum recording time window s 10</p><p> f) Triggering criteria Binary or analogue</p><p> g) Pre-trigger s 2</p><p> h) Digital trigger Positive and/or negative edges i) Analog trigger Exceeding limit values and gradients j) Export file types Comtrade</p><p> k) Minimum number of records stored in memory 10</p><p>TRANSFORMERS</p><p>EXCITATION TRANSFORMERS a) Type Three individual dry type single phase units b) HV side nominal voltage kV 11</p><p> c) LV side nominal voltage V</p><p> d) Size (electrical) VA</p><p> e) Impedance %</p><p> f) Vector group Ydx</p><p> g) Maximum winding operating temperature at rated oC power @ ambient of 40oC h) Maximum core operating temperature at rated oC power @ ambient of 40oC i) Maximum cubicle surface temperature at rated oC power @ ambient of 40oC j) Excitation transformer sizing calculations required Yes</p><p>CURRENT TRANSFORMERS FOR EXCITATION OVER CURRENT PROTECTION a) CT ratio</p><p> b) VA rating VA</p><p> c) CT class 5P10</p><p>PROTECTION IED’S a) Manufacturer DESCRIPTION Schedule A Schedule B</p><p> b) Type Digital</p><p> c) Connection 3 phase</p><p> d) Nominal current (In) A 1</p><p> e) Current setting range 0.05 to 2.5 In</p><p> f) Time multiplier 0.05 to 1.00</p><p> g) Error of settings % < 7.5</p><p> h) Overload capability 100 In for one second</p><p> i) Curve/characteristic IEC very inverse & extremely inverse selectable j) High set 1.0 to 30.0 In</p><p> k) High set time s 0.04 to 5.00</p><p> l) Number of IDMT curves simultaneously active 1 or 2</p><p> m) Logic functionality to add sustained fault timer Yes</p><p> n) Sustained fault timer range s 0.00 to 10.00</p><p> o) Setting resolution ms 10</p><p>AUXILLIARY ELECTRICAL & MISCELLANEOUS COMPONENTS</p><p>INTERNAL POWER SUPPLY UNITS a) Manufacturer</p><p> b) Input voltage range to maintain nominal output % 85 to 120 voltage c) Maintain rated output voltage in case of supply loss ms 500</p><p> d) Overload indication and protection Yes</p><p>MCB’S FOR CONTROL CIRCUITS a) Manufacturer</p><p> b) Rated breaking current kA 5</p><p> c) Rated voltage VAC/VDC</p><p> d) Curve selections</p><p>FUSES POWER ELECTRONICS a) Manufacturer</p><p> b) Type industrial HRC for power electronics</p><p>CONTROL CIRCUIT FUSES a) Manufacturer DESCRIPTION Schedule A Schedule B</p><p> b) Type BS88 or Cylindrical</p><p> c) Rated voltage V</p><p> d) Rated breaking current kA</p><p>SIGNAL LAMPS OR LIQUID DISPLAY a) Manufacturer</p><p> b) Type LED</p><p> c) Supply voltage V</p><p>LABELS a) Language English</p><p> b) Colour (General Labels) White background, black lettering c) Colour (Warning Labels) White background, red lettering d) Letter print: Internal labels Laser printed or engraved e) Letter print: External labels Engraved</p><p>FERRULE NUMBERING a) Manufacturer Grafoplast or Equivalent b) Material</p><p> c) Size mm 15x4</p><p> d) Type Sleeve type</p><p> e) Font Arial, bold</p><p> f) Colour White background, black lettering</p><p>CABLE NUMBERING a) Manufacturer Grafoplast or Equivalent b) Material PVC, UV resistant</p><p> c) Size mm 70x10</p><p> d) Type Sleeve type</p><p> e) Font Arial, bold</p><p> f) Colour Yellow background, black lettering g) Placement Above gland plate and before panel entry (top/bottom)</p><p>TRANSDUCERS DESCRIPTION Schedule A Schedule B</p><p> a) Manufacturer</p><p> b) Type mA 4-20</p><p> c) Accuracy Class 1</p><p> d) Power supply Vdc 24/220</p><p>CT TEST BLOCKS a) Manufacturer IST / GE</p><p> b) Type PK2 (4 or 6way)</p><p> c) Mounting Panel/surface</p><p> d) Supply test handles Yes</p><p>VT TEST BLOCKS a) Manufacturer IST / GE</p><p> b) Type PK2 (4 way)</p><p> c) Mounting Panel/surface</p><p> d) Supply test handles Yes</p><p>INDICATING INSTRUMENTS a) Manufacturer</p><p> b) Type mA 4-20</p><p> c) Size mm 72x72</p><p> d) Full scale deflection angle deg 240</p><p> e) Accuracy Class 1</p><p> f) Mounting Flush</p><p> g) Generator stator voltage range kV 0 to 15</p><p> h) Generator stator current range kA 0 to 20</p><p> i) Generator active power range MW -300 to 300</p><p> j) Generator reactive power range MVAr -300 to 300</p><p> k) Generator field current range A 0 to 2200</p><p> l) Generator field voltage range V 0 to 500</p><p>EXCITATION TRANSFORMER CUBICLE SAFETY SWITCHES a) Type Roller lever or plunger b) Roller lever: Minimum pre travel deg 10 DESCRIPTION Schedule A Schedule B</p><p> c) Roller lever: Minimum over travel deg 20</p><p> d) Roller lever: Minimum total travel deg 50</p><p> e) Plunger: Minimum pre travel mm 2</p><p> f) Plunger: Minimum total travel mm 10</p><p> g) Material Die cast (Zinc or Aluminium) h) IP rating IP65</p><p> i) Contact rating at 220VDC (IEC 60947-5-1), Trip coil DC-13 with no economising resistor j) Contact rating at 220VDC (IEC 60947-5-1), Trip coil DC-14 with economising resistor k) Number of contacts Two N/C</p><p> l) Contact action Snap</p><p>CABLING</p><p>PROCESS CONTROL AND INSTRUMENTATION CABLING (<1 AMP SIGNALS) a) Manufacturer</p><p> b) Code UVG_ _ _CM</p><p> c) Type Low halogen</p><p> d) Core identification Colour coded with stripes per core e) Minimum voltage rating V 300/500</p><p>LV POWER & CONTROL CABLING a) Manufacturer</p><p> b) Code BVV_ _ _ CM</p><p> c) Type Low halogen</p><p> d) Core identification (2-4 cores) Colour coded</p><p> e) Core identification (>4 cores) Individual core numbering f) Minimum voltage rating V 600/1000</p><p>ROTOR CABLING a) Manufacturer</p><p> b) Code</p><p> c) Type Low halogen</p><p> d) Minimum voltage rating V 600/1000 DESCRIPTION Schedule A Schedule B</p><p>EXCITATION TRANSFORMER HV CABLING a) Manufacturer</p><p> b) Code</p><p> c) Type Low halogen</p><p> d) Core identification Heatshrink to colour code e) Minimum voltage rating kV 22</p><p>EXCITATION TRANSFORMER LV CABLING a) Manufacturer</p><p> b) Code</p><p> c) Type Low halogen</p><p> d) Core identification Heatshrink to colour code e) Minimum voltage rating V 600/1000</p><p>HV INSULATION</p><p>A) Tests on power plant and material IEC 60036-1</p><p> b) Tests on electronic plant and material IEC 60255 Class II</p><p>SUB-CONTRACTORS a) Subcontractor engaged in delivery of assembly</p><p> b) Subcontractor engaged in erection of assembly</p><p> c) Subcontractor engaged in commissioning of assembly d) Other subcontractors</p><p>MANUALS & SOFTWARE</p><p>OPERATING AND MAINTENANCE MANUALS a) Number of copies of all instruction/O&M manuals 5 required b) Electronic submission required Yes – CD/DVD</p><p> c) Format At least searchable pdf</p><p>SPECIAL TOOLS a) Number of each special tool set required for 2 maintenance b) Software packages Windows compatibility Windows 7 upwards DESCRIPTION Schedule A Schedule B</p><p>TRAINING</p><p>NUMBER OF STAFF TO BE TRAINED a) Engineering/Commissioning staff 8</p><p> b) Maintenance personnel 12</p><p> c) Operating personnel 15</p><p>LOCATION a) Engineering /Commissioning staff</p><p> b) Maintenance personnel Drakensberg Power Station c) Operating personnel Drakensberg Power Station</p>