VOLUME: IIIC SCHEDULE IIIC/4 11 KV AND 3.3 KV SWITCHGEARS

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1 VOLUME: IIIC SCHEDULE IIIC/4 11 KV AND 3.3 KV SWITCHGEARS A. 11 KV SWITCHGEAR 1.0 SWITCHGEAR ASSEMBLY 1.1 Make : 1.2 Type : 1.3 Reference Standard : 1.4 Voltage (Nom./Max.) KV : 1.5 Phase, Frequency No,Hz. : 1.6 Short Circuit Rating 1.7 Insulation Level a) Interrupting Symmetrical MVA : b) Short-time for 3 sec. KA rms : a) Impulse Withstand KV P : b) 1-min. 50 Hz. Voltage Withstand KV rms : 1.8 Metal-clad construction? Yes/No : 1.9 Degree of Protection : 1.10 Minimum thickness of sheet metal used mm. : 1.11 Switchgear completely assembled, wired and tested at factory Yes/No : 2.0 CONSTRUCTION 2.1 Draw-out feature provided for : a) Circuit breaker with SERVICE, TEST and DISCONNECTED position Yes/No : b) Voltage Transformer Yes/No : Sch-IIIC/4: 1

2 c) Protective relays Yes/No : 2.2 Breaker cubicle a) Cubicle door can be closed with breaker in TEST position Yes/No : b) Working zone limits from floor level mm : c) Earth Switch provided : Yes/No d) Feature for safety locking provided (explain the feature) : Yes/No 2.3 All meters, switch & relays flush mounted type Yes/No : 2.4 Minimum clear space required at a) Front for breaker withdrawal mm : b) Rear mm : 2.5 Typical vertical section a) Overall dimension and weight mm, Kg. : i) Incomer/Tie : ii) Buscoupler : iii) Transformer/Motor fdr. : 2.6 Control compartment provided with separate access door : Yes/No 2.7 Access to outgoing cable chamber from rear with removable cover : Yes/No 2.8 Pathway for bus wire provided : Yes/No 3.0 BUS BAR 3.1 Make : 3.2 Material & Grade : 3.3 Reference Standard : 3.4 Cross sectional Area & Size Sq.mm & mm : 3.5 Continuous Current (at site condition, 50 Deg.C ambient & within cubicle) : Sch-IIIC/4: 2

3 3.6 Maximum temperature rise over 50 Deg.C Deg.C : 3.7 Short-time current for 3 sec KA rms : 3.8 DC resistance at 85 Deg.C Ohm/m/ph : 3.9 Skin-effect ratio : 3.10 Reactance Ohm/m/ph : 3.11 Losses-middle phase W/m/ph : 3.12 Minimum clearance of bare bus bar and connection a) Phase to phase mm : b) Phase to ground mm : 3.13 Bus bar provided with a) Insulating sleeve : b) Phase barriers : c) Cast resin shrouds for joint : 3.14 Bus Connections a) Silver plated : b) Made with antioxide grease : 3.15 Bus bar support spacing mm : 3.16 Bus support insulator a) Make : b) Type : c) Reference Standard : d) Voltage Class KV : e) Minimum creepage distance mm : f) Cantilever strength Kg/Sq.cm : g) Net weight Kg : Sch-IIIC/4: 3

4 4.0 CIRCUIT BREAKER 4.1 Make : 4.2 Type : 4.3 Reference standard : 4.4 Rated voltage KV : 4.5 Rated frequency Hz. : 4.6 No. of poles No. : 4.7 Rated Currents Continuous (at site condition, 50 Deg.C ambient & within cubicle) Amp. : b) Short-time current for 3 sec. KA rms. : 4.8 Max. temperature rise over 50 Deg.C ambient Deg.C : 4.9 Rated operating duty : 4.10 Interrupting capacity at rated voltage and operating duty a) Symmetrical KA rms. : b) Assymmetrical KA rms. : 4.11 Rated making current KA peak : 4.12 Transient Recovery Voltage a) Rate of rise KV/ms : b) Peak voltage KV : 4.13 Maximum over voltage factor when switching off a) Unloaded transformer : b) Loaded transformer : c) Unloaded lines : d) Induction Motor : e) Capacitor banks Sch-IIIC/4: 4

5 4.14 Insulation Level a) Impulse voltage withstand with 1.2 x 50 micro sec. wave KV peak: b) 1-minute 50 Hz. voltage withstand KV : 4.15 At 100% interrupting capacity a) Opening time - Max. ms : b) Arcing time Max. ms : c) Total tripping time (Max.) ms. : 4.16 Total closing time (Max.) ms : 4.17 Number of breaks per pole : 4.18 Total length of breaks per pole mm : 4.19 Total length of contact travel mm : 4.20 Rate of contact travel a) At tripping m/sec : b) At closing m/sec : 4.21 No. of breaker operations permissible, without requiring inspection, replacement of contacts and other main parts : 4.22 Type of contacts a) At 100% rated current : b) At 100% rated interrupting current : a) Main : b) Arcing 4.23 Material of contacts a) Main : b) Arcing : c) Whether contacts silver plated : d) Thickness of silver plating : 4.24 Contact pressure at no load Kg. : Sch-IIIC/4: 5

6 4.25 Minimum clearance in air mm a) Between poles : b) Between live parts and ground : 4.26 Type of arc control device provided : 4.27 Operating Mechanism a) Type : b) No. of breaker operations stored : c) Trip free or fixed trip? : d) Anti-pumping features provided? : 4.28 Spring charging motor 4.29 Closing Coil 4.30 Tripping Coil a) Rating KW : b) Voltage (A.C. or D.C.) V : c) Permissible voltage variation % : a) Voltage V : b) Permissible voltage variation % : c) Closing current at rated voltage A : a) Voltage V : b) Permissible voltage variation % : c) Trip current at rated voltage A : 4.31 For trip circuit supervision can the tripping coil be connected in series with auxiliary "74" as shown in the drawing : 4.32 Breaker/Cubicle Accessories such as control switch, indication lamps, relays furnished as specified? : Breaker/Breaker Cubicle provided with the following a) Mechanical safety interlock : b) Automatic safety shutter : Sch-IIIC/4: 6

7 c) Emergency manual trip : d) Mechanical ON-OFF indicator : e) Operation counter : f) Charge/Discharge indication : g) Manual spring charging facility? : h) Auxiliary switch with 6 NO + 6 NC contacts mounted on drawout portion : i) 2 Cell switch with 4 NO +4 NC contacts.: j) Auxiliary switch with 4 NO + 4 NC contacts mounted as stationary parts : k) Surge protection device? : 4.33 Cell/Auxiliary Switch a) Are switch contacts convertible type? : b) Contact rating at : 240V A.C. 220V D.C. i) Make & continuous Amp. : ii) Break (Inductive) Amp. : P.F. for A.C.& L/R for D.C. : 4.34 Trip circuit supervision relay furnished for each breaker : 4.35 For SF6 breaker a) Pressure switch in each pole provided : Yes/No b) Pressure indicator provided : Yes/No c) Filling arrangement in poles provided : Yes/No 4.36 Net weight of the breaker Kg. : 4.37 Impact load for foundation design (to include dead load plus impact values on opening at maximum interrupting rating).kg. : 4.38 Overall dimension (LxBxH) mm : 4.39 Type test report on identical breaker furnished Sch-IIIC/4: 7

8 5.0 CONTROL & INDICATIONS 5.1 Push Buttons 5.2 Lamps 5.3 Selector Switch a) Make : b) Type & Cat. No. : c) Contact rating at : 240V A.C. 220V D.C. i) Make & continuous Amp. : ii) Break (Inductive) Amp. P..F for A.C.& L/R for D.C. : a) Make : b) Type & Cat. No. : c) voltage : a) Make : b) Type & Cat. No. : c) Contact rating at : 240V A.C. 220V D.C. i) Make & continuous Amps. : ii) Break (Inductive) Amps. : d) Key interlock furnished? : 6.0 CURRENT TRANSFORMER 6.1 Make : 6.2 Type : 6.3 Reference standard : 6.4 CT ratios? : 6.5 Rated frequency : 6.6 Short Circuit Withstand a) Short-time current for 3 sec. KA rms: Sch-IIIC/4: 8

9 b) Dynamic current KA peak: 6.7 Class of Insulation : 6.8 Temperature rise over 50 Deg.C ambient Deg.C : 6.9 Basic Insulation level KV peak: 6.10 CT magnetization curve furnished? : 6.11 CT for Differential Protection a) Class : b) Secondary resistance at 75 Deg.C : c) Knee point voltage : d) Excitation current at VK/2 : 6.12 Metering C.T. VA Burden Class/ALF or ISF a) Incomer/Tie : b) Motor feeder : c) Transformer feeder : 6.12 Relaying C.T. a) Incomer/Tie : b) Motor feeder : c) Transformer feeder : 7.0 VOLTAGE TRANSFORMER 7.1 Make : 7.2 Type : 7.3 Reference standard : 7.4 Voltage ratio : 7.5 Rated frequency : 7.6 Accuracy class : 7.7 VA burden : 7.8 Over voltage factor Sch-IIIC/4: 9

10 a) Continuous : b) 30 seconds : 7.9 Class of Insulation : 7.10 Temp-rise over 50 Deg.C ambient Deg.C : 7.11 Basic Impulse level KVp : 7.12 Winding Connection 7.13 Fuses a) Primary : b) Secondary : a) Continuous ratings - H.V/L.V Amps : b) Symmetrical fault rating - HV/LV KA rms: 8.0 RELAYS 8.1 Draw-out type with built in test facilities : 8.2 Type of mounting? : 8.3 Reference standard : 8.4 All relays furnished as per the drawings and annexures? : 8.5 All relevant relay leaflets and catalogue furnished? Yes/No : 8.6 Relay details Incomer/tie feeder Make Type Range a) 3- I.D.M.T o/c relay for phase fault 51 : b) 1- Definite time E/F relay for earth fault 50 G : Transformer feeder a) 3-IDMT o/c relay with high-set instantaneous unit 50/51 : Sch-IIIC/4: 10

11 b) 1-instanteneous o/c relay for earth fault 50 N : c) Restricted earth fault rating : d) Differential relays - i) For tie differential : ii) For bus zone : Motor feeder Make Type Range a) 1-digital/microprocessor based numerical relay for motor protection relay 99 : b) 1-Differential relay 3-pole for motors above and including 1000 KW 87 : c) 1-Locked rotor relay 50 LR : with auxiliary 50 LRX: Changeover Relays furnished for manual/automatic changeover : a) : b) : c) : d) : e) : f) : g) : h) : I) : j) : k) : Sch-IIIC/4: 11

12 8.6.5 Miscellaneous Relay Make Type Range a) Antipumping relay 94 : b) Trip supervision relay 74 : Auto trip relay : c) Lockout relay 220V D.C. hand reset with 86 : 4 pairs of contact : 8 pairs of contact : d) Time delay relay Delay on drop out 62 : Delay on pick up 2 : e) Frequency compensated u/v relay 27 : 3-pole : 1-pole : f) Auxiliary relay 220V D.C. self reset with x : 4 pair of contact 8 pair of contact g) Synchronising check relay 25 : h) Locked out relay 220V D.C. with electrical reset : 4 NO + 4 NC Contact : 8 NO + 8 NC Contact : i) Gas pressure monitoring relay : j) Flag relay : 8.7 Transducers 9.0 METERS a) Make : b) Type : c) Output (for energy, current and power) : Sch-IIIC/4: 12

13 9.1 Make : 9.2 Type : 9.3 Reference standard : 9.4 Size : 9.5 Scale : 9.6 Accuracy class 9.7 Meter switch a) Make : b) Type : c) Cat. No. : 10.0 SECONDARY WIRING 10.1 Type and Insulation : 10.2 Voltage grade : 10.3 Conductor material : 10.4 Conductor size (minimum) a) Potential circuit : b) Control & current circuit : 10.5 Wires identified at both ends with ferrules : 11.0 TERMINAL BLOCK 11.1 Make : 11.2 Type : 11.3 Cat. No. : % spare terminals furnished : 12.0 CABLE TERMINATION 12.1 Cable termination and connection arrangement furnished as specified : 12.2 Removable Gland Plate a) Material for multi- core cable : Sch-IIIC/4: 13

14 b) Material for single- core cable : c) Thickness of the plate : 13.0 BUSDUCT CONNECTION 13.1 Busduct connection for : a) Top entry Yes/No : b) Side entry Yes/No : 14.0 GROUND BUS 14.1 Ground bus furnished : 14.2 Material : 14.3 Size : 15.0 NAME PLATE 15.1 Material : 15.2 Thickness : 15.3 Size for mm a) Panel : b) Equipment/devices : 16.0 SPACE HEATER/PLUG SOCKET 16.1 Cubicle Heater a) Thermostat controlled? : b) Wattage : c) Voltage : 16.2 Plug Socket a) Type : b) Rating : 16.3 Motor Heater a) Provision made for motor heater supply:: b) Separate contactor furnished : Sch-IIIC/4: 14

15 c) If so, contactor rating : 16.4 Cubicle heater, motor heater & plug socket circuit provided with individual switch fuse unit? : 17.0 A.C./D.C. SUPPLY 17.1 Isolating switches fuse/mccb unit for incoming supply : a) A.C. - type & rating : b) D.C. - type & rating : c) Three position DC selector switch : 17.2 Isolating switch fuse/mccb unit at each cubicle : a) A.C. supply - type & rating : b) D.C. supply - type & rating : 18.0 TROPICAL PROTECTION 18.1 a) Any special treatment for tropical protection? : 19.0 PAINTING b) Screens are of corrosion resistant materials? : 19.1 Finish of switchgear a) Inside : b) Outside : 20.0 NO. OF ACCESSORIES FURNISHED a) Earthing equipment : b) Slow closing device for maintenance : c) Test cabinet : d) Cable termination kit i) Make : ii) Type : Sch-IIIC/4: 15

16 iii) Complete with all accessories : 21.0 DRAWINGS/DATA 21.1 General Arrangement : 21.2 Foundation Plan : 21.3 Breaker Control Schematic : 21.4 Bill of Material : B. 3.3 KV SWITCHGEAR 1.0 SWITCHGEAR ASSEMBLY 1.1 Make : 1.2 Type : 1.3 Reference Standard : 1.4 Voltage (Nom./Max.) KV : 1.5 Phase, Frequency No,Hz. : 1.6 Short Circuit Rating 1.7 Insulation Level a) Interrupting Symmetrical MVA : b) Short-time for 3 sec. KA rms : a) Impulse Withstand KV P : b) 1-min. 50 Hz. Voltage Withstand KV rms : 1.8 Metal-clad construction? Yes/No : 1.9 Degree of Protection : 1.10 Minimum thickness of sheet metal used mm. : 1.11 Switchgear completely assembled, wired and tested at factory Yes/No : 2.0 CONSTRUCTION Sch-IIIC/4: 16

17 2.1 Draw-out feature provided for : a) Circuit breaker with SERVICE, TEST and DISCONNECTED position Yes/No : b) Voltage Transformer Yes/No : c) Protective relays Yes/No : 2.2 Breaker cubicle a) Cubicle door can be closed with breaker in TEST position Yes/No : b) Working zone limits from floor level mm : c) Earth Switch provided : Yes/No d) Feature for safety locking provided (explain the feature) : Yes/No 2.3 All meters, switch & relays flush mounted type Yes/No : 2.4 Minimum clear space required at a) Front for breaker withdrawal mm : b) Rear mm : 2.5 Typical vertical section a) Overall dimension and weight mm, Kg. : i) Incomer/Tie : ii) Buscoupler : iii) Transformer/Motor fdr. : 2.6 Control compartment provided with separate access door : Yes/No 2.7 Access to outgoing cable chamber from rear with removable cover : Yes/No 2.8 Pathway for bus wire provided : Yes/No 3.0 BUS BAR 3.1 Make : Sch-IIIC/4: 17

18 3.2 Material & Grade : 3.3 Reference Standard : 3.4 Cross sectional Area & Size Sq.mm & mm : 3.5 Continuous Current (at site condition, 50 Deg.C ambient & within cubicle) : 3.6 Maximum temperature rise over 50 Deg.C Deg.C : 3.7 Short-time current for 3 sec KA rms : 3.8 DC resistance at 85 Deg.C Ohm/m/ph : 3.9 Skin-effect ratio : 3.10 Reactance Ohm/m/ph : 3.11 Losses-middle phase W/m/ph : 3.12 Minimum clearance of bare bus bar and connection a) Phase to phase mm : b) Phase to ground mm : 3.13 Bus bar provided with a) Insulating sleeve : b) Phase barriers : c) Cast resin shrouds for joint : 3.14 Bus Connections a) Silver plated : b) Made with antioxide grease : 3.15 Bus bar support spacing mm : 3.16 Bus support insulator a) Make : b) Type : c) Reference Standard : d) Voltage Class KV : Sch-IIIC/4: 18

19 e) Minimum creepage distance mm : f) Cantilever strength Kg/Sq.cm : g) Net weight Kg : 4.0 CIRCUIT BREAKER 4.1 Make : 4.2 Type : 4.3 Reference standard : 4.4 Rated voltage KV : 4.5 Rated frequency Hz. : 4.6 No. of poles No. : 4.7 Rated Currents Continuous (at site condition, 50 Deg.C ambient & within cubicle) Amp. : b) Short-time current for 3 sec. KA rms. : 4.8 Max. temperature rise over 50 Deg.C ambient Deg.C : 4.9 Rated operating duty : 4.10 Interrupting capacity at rated voltage and operating duty a) Symmetrical KA rms. : b) Assymmetrical KA rms. : 4.11 Rated making current KA peak : 4.12 Transient Recovery Voltage a) Rate of rise KV/ms : b) Peak voltage KV : 4.13 Maximum over voltage factor when switching off a) Unloaded transformer : b) Loaded transformer : Sch-IIIC/4: 19

20 4.14 Insulation Level c) Unloaded lines : d) Induction Motor : e) Capacitor banks : a) Impulse voltage withstand with 1.2 x 50 micro sec. wave KV peak: b) 1-minute 50 Hz. voltage withstand KV : 4.15 At 100% interrupting capacity a) Opening time - Max. ms : b) Arcing time Max. ms : c) Total tripping time (Max.) ms. : 4.16 Total closing time (Max.) ms : 4.17 Number of breaks per pole : 4.18 Total length of breaks per pole mm : 4.19 Total length of contact travel mm : 4.20 Rate of contact travel a) At tripping m/sec : b) At closing m/sec : 4.21 No. of breaker operations permissible, without requiring inspection, replacement of contacts and other main parts : 4.22 Type of contacts a) At 100% rated current : b) At 100% rated interrupting current : a) Main : b) Arcing : 4.23 Material of contacts a) Main : b) Arcing : Sch-IIIC/4: 20

21 c) Whether contacts silver plated : d) Thickness of silver plating : 4.24 Contact pressure at no load Kg. : 4.25 Minimum clearance in air mm a) Between poles : b) Between live parts and ground : 4.26 Type of arc control device provided : 4.27 Operating Mechanism a) Type : b) No. of breaker operations stored : c) Trip free or fixed trip? : d) Anti-pumping features provided? : 4.28 Spring charging motor a) Rating KW : b) Voltage (A.C. or D.C.) V : c) Permissible voltage variation % : 4.29 Closing Coil 4.30 Tripping Coil a) Voltage V : b) Permissible voltage variation % : c) Closing current at rated voltage A : a) Voltage V : b) Permissible voltage variation % : c) Trip current at rated voltage A : 4.31 For trip circuit supervision can the tripping coil be connected in series with auxiliary "74" as shown in the drawing : 4.32 Breaker/Cubicle Accessories such as control switch, indication lamps, Sch-IIIC/4: 21

22 relays furnished as specified? : Breaker/Breaker Cubicle provided with the following a) Mechanical safety interlock : b) Automatic safety shutter : c) Emergency manual trip : d) Mechanical ON-OFF indicator : e) Operation counter : f) Charge/Discharge indication : g) Manual spring charging facility? : h) Auxiliary switch with 6 NO + 6 NC contacts mounted on drawout portion : i) 2 Cell switch with 4 NO +4 NC contacts.: j) Auxiliary switch with 4 NO + 4 NC contacts mounted as stationary parts : k) Surge protection device? : 4.33 Cell/Auxiliary Switch a) Are switch contacts convertible type? : b) Contact rating at : 240V A.C. 220V D.C. i) Make & continuous Amp. : ii) Break (Inductive) Amp. : P.F. for A.C.& L/R for D.C. : 4.34 Trip circuit supervision relay furnished for each breaker : 4.35 For SF6 breaker a) Pressure switch in each pole provided : Yes/No b) Pressure indicator provided : Yes/No c) Filling arrangement in poles provided : Yes/No 4.36 Net weight of the breaker Kg. : 4.37 Impact load for foundation design (to include dead load plus impact values on opening at maximum interrupting rating).kg. : Sch-IIIC/4: 22

23 4.38 Overall dimension (LxBxH) mm : 4.39 Type test report on identical breaker furnished : 5.0 CONTROL & INDICATIONS 5.1 Push Buttons 5.2 Lamps 5.3 Selector Switch a) Make : b) Type & Cat. No. : c) Contact rating at : 240V A.C. 220V D.C. i) Make & continuous Amp. : ii) Break (Inductive) Amp. P..F for A.C.& L/R for D.C. : a) Make : b) Type & Cat. No. : c) voltage : a) Make : b) Type & Cat. No. : c) Contact rating at : 240V A.C. 220V D.C. i) Make & continuous Amps. : ii) Break (Inductive) Amps. : d) Key interlock furnished? : 6.0 CURRENT TRANSFORMER 6.1 Make : 6.2 Type : 6.3 Reference standard : 6.4 CT ratios? : 6.5 Rated frequency : 6.6 Short Circuit Withstand Sch-IIIC/4: 23

24 a) Short-time current for 3 sec. KA rms: b) Dynamic current KA peak: 6.7 Class of Insulation : 6.8 Temperature rise over 50 Deg.C ambient Deg.C : 6.9 Basic Insulation level KV peak: 6.10 CT magnetization curve furnished? : 6.11 CT for Differential Protection a) Class : b) Secondary resistance at 75 Deg.C : c) Knee point voltage : d) Excitation current at VK/2 : 6.12 Metering C.T. VA Burden Class/ALF or ISF 6.12 Relaying C.T. a) Incomer/Tie : b) Motor feeder : c) Transformer feeder : a) Incomer/Tie : b) Motor feeder : c) Transformer feeder : 7.0 VOLTAGE TRANSFORMER 7.1 Make : 7.2 Type : 7.3 Reference standard : 7.4 Voltage ratio : 7.5 Rated frequency : Sch-IIIC/4: 24

25 7.6 Accuracy class : 7.7 VA burden : 7.8 Over voltage factor a) Continuous : b) 30 seconds : 7.9 Class of Insulation : 7.10 Temp-rise over 50 Deg.C ambient Deg.C : 7.11 Basic Impulse level KVp : 7.12 Winding Connection 7.13 Fuses a) Primary : b) Secondary : a) Continuous ratings - H.V/L.V Amps : b) Symmetrical fault rating - HV/LV KA rms: 8.0 RELAYS 8.1 Draw-out type with built in test facilities : 8.2 Type of mounting? : 8.3 Reference standard : 8.4 All relays furnished as per the drawings and annexures? : 8.5 All relevant relay leaflets and catalogue furnished? Yes/No : 8.6 Relay details Incomer/tie feeder Make Type Range a) 3- I.D.M.T o/c relay for phase fault 51 : b) 1- Definite time E/F relay for earth fault 50 G : Transformer feeder Sch-IIIC/4: 25

26 a) 3-IDMT o/c relay with high-set instantaneous unit 50/51 : b) 1-instanteneous o/c relay for earth fault 50 N : c) Restricted earth fault rating : d) Differential relays - i) For tie differential : ii) For bus zone : Motor feeder Make Type Range a) 1-digital/microprocessor based numerical relay for motor protection relay 99 : b) 1-Differential relay 3-pole for motors above and including 1000 KW 87 : c) 1-Locked rotor relay 50 LR : with auxiliary 50 LRX: Changeover Relays furnished for manual/automatic changeover : a) : b) : c) : d) : e) : f) : g) : h) : I) : j) : k) : Sch-IIIC/4: 26

27 8.6.5 Miscellaneous Relay Make Type Range a) Antipumping relay 94 : b) Trip supervision relay 74 : Auto trip relay : c) Lockout relay 220V D.C. hand reset with 86 : 4 pairs of contact : 8 pairs of contact : d) Time delay relay Delay on drop out 62 : Delay on pick up 2 : e) Frequency compensated u/v relay 27 : 3-pole : 1-pole : f) Auxiliary relay 220V D.C. self reset with x : 4 pair of contact 8 pair of contact g) Synchronising check relay 25 : 8.7 Transducers 9.0 METERS h) Locked out relay 220V D.C. with electrical reset : 4 NO + 4 NC Contact : 8 NO + 8 NC Contact : i) Gas pressure monitoring relay : j) Flag relay : a) Make : b) Type : c) Output (for energy, current and power) : Sch-IIIC/4: 27

28 9.1 Make : 9.2 Type : 9.3 Reference standard : 9.4 Size : 9.5 Scale : 9.6 Accuracy class : 9.7 Meter switch a) Make : b) Type : c) Cat. No. : 10.0 SECONDARY WIRING 10.1 Type and Insulation : 10.2 Voltage grade : 10.3 Conductor material : 10.4 Conductor size (minimum) a) Potential circuit : b) Control & current circuit : 10.5 Wires identified at both ends with ferrules : 11.0 TERMINAL BLOCK 11.1 Make : 11.2 Type : 11.3 Cat. No. : % spare terminals furnished : 12.0 CABLE TERMINATION 12.1 Cable termination and connection arrangement furnished as specified : 12.2 Removable Gland Plate a) Material for multi- core cable : Sch-IIIC/4: 28

29 b) Material for single- core cable : c) Thickness of the plate : 13.0 BUSDUCT CONNECTION 13.1 Busduct connection for : a) Top entry Yes/No : b) Side entry Yes/No : 14.0 GROUND BUS 14.1 Ground bus furnished : 14.2 Material : 14.3 Size : 15.0 NAME PLATE 15.1 Material : 15.2 Thickness : 15.3 Size for mm a) Panel : b) Equipment/devices : 16.0 SPACE HEATER/PLUG SOCKET 16.1 Cubicle Heater a) Thermostat controlled? : b) Wattage : c) Voltage : 16.2 Plug Socket a) Type : b) Rating : 16.3 Motor Heater a) Provision made for motor heater supply:: b) Separate contactor furnished : Sch-IIIC/4: 29

30 c) If so, contactor rating : 16.4 Cubicle heater, motor heater & plug socket circuit provided with individual switch fuse unit? : 17.0 A.C./D.C. SUPPLY 17.1 Isolating switches fuse/mccb unit for incoming supply : a) A.C. - type & rating : b) D.C. - type & rating : c) Three position DC selector switch : 17.2 Isolating switch fuse/mccb unit at each cubicle : a) A.C. supply - type & rating : b) D.C. supply - type & rating : 18.0 TROPICAL PROTECTION 18.1 a) Any special treatment for tropical protection? : 19.0 PAINTING b) Screens are of corrosion resistant materials? : 19.1 Finish of switchgear a) Inside : b) Outside : 20.0 NO. OF ACCESSORIES FURNISHED a) Earthing equipment : b) Slow closing device for maintenance : c) Test cabinet : d) Cable termination kit i) Make : Sch-IIIC/4: 30

31 ii) Type : iii) Complete with all accessories : 21.0 DRAWINGS/DATA 21.1 General Arrangement : 21.2 Foundation Plan : 21.3 Breaker Control Schematic : 21.4 Bill of Material Sch-IIIC/4: 31

32 VOLUME: IIIC SCHEDULE IIIC/5 11 KV & 3.3 KV SEGREGATED PAHSE BUSDUCT 1.0 SEGREGATED PHASE BUSDUCT 11KV 3.3KV 1.1 Make : 1.2 Type : 1.3 Reference Standard : 1.4 Rated Voltage V : 1.5 Phase Nos. : 1.6 Frequency Hz : 1.7 Insulation Level a) 1 min. Hipot KV rms: b) Basic Impulse KV peak : 1.8 Rated Continuous Current Amp : 1.9 Maximum temperature rise over 50 Deg.C ambient a) Bus Conductor Deg.C : b) Bus Enclosure Deg.C : 1.10 Guaranteed Calculated Losses per set of Bus Duct without any positive tolerance a) Conductor KW : b) Enclosure KW : c) Total kw : Sch-IIIC/5: 1

33 1.11 Rated Short Time Current Symmetrical Momentary KA for 1 Sec. KA peak Main Run 11KV. : 3.3 KV. : 11KV 3.3KV 1.12 Weight per meter run of Bus Duct Kg : 1.13 Shipping Data a) Weight of heaviest package Kg : b) Dimension of largest package (L x B x H) mm : 1.14 Material a) Conductor : b) Enclosure : 1.15 Conductivity a) Conductor : b) Enclosure : 1.16 Conductor Shape 1.17 Conductor Size Sq.mm : Sch-IIIC/5: 2

34 1.18 Enclosure Data Phast to phase spacing mm Neutral spacing mm Overall dimensions mm Thickness mm a) 11 KV : b) 3.3 Kv : 1.19 Interphase Barrier plate for segregated bus duct 11KV 3.3KV a) Material : b) Thickness : 1.20 D.C. Resistance at in micro Ohm/metre/phase Conductor Enclosure 11KV 3.3KV 11KV 3.3KV a) 20 Deg.C : b) 85 Deg.C : 11KV 3.3KV 1.21 Skin effect Ratio Cycle Reactance in Ohm/meter/ phase 1.22 Capacitance to Ground in Microfarad/meter/phase Conductor Enclosure 11KV 3.3KV 11KV 3.3KV 1.24 Losses in Watt/meter/phase 1.25 Enclosure Finish a) Outside : b) Inside : 1.26 Phase to earth clearance provided mm : 1.27 Bus Insulator a) Make : b) Type : c) Reference Standard : 11KV 3.3KV Sch-IIIC/5: 3

35 d) Number per support : e) Voltage class KV : f) Creepage distance mm : g) Compression strength Kg : h) Cantilever strength Kg : 1.28 Supporting Steel Structure Hot-dip galvanised Yes/No : 1.29 Grounding a) Material and size of ground bus provided separately? : b) Number of ground pads provided for 50 x 6 galvanised steel flats : 11KV 3.3KV 1.30 Switchgear Terminal Adaptor Box a) Material of enclosure : b) Thickness of enclosure mm : c) Material of Interphase barrier, if any : d) Thickness of interphase barrier : Sch-IIIC/5: 4

36 1.31 Seal-off Bushings a) Make : b) Type : c) Reference Standard : d) Rated Voltage KV : e) 1 minute power frequency withstand voltage Dry KV : Wet KV : f) Impulse withstand KVp : g) Creepage distance mm : h) Weight of each bushing Kg : 1.32 Bus Duct Layout Reference Drawing No. : 1.33 Catalogue enclosed for various pieces of equipment Yes/No : 1.34 Minimum clearance for bus bar and connection a) Phase to phase : b) Phase to earth : 2.0 SPACE HEATER PANEL 2.1 Type : 2.2 Thickness of sheet steel used mm : 2.3 Dimension mm : Sch-IIIC/5: 5

37 11KV 3.3KV 2.4 Weight Kg : 2.5 Finish a) Inside : b) Outside : 2.6 Degree of Protection : 2.7 Space Heater a) KW : b) Volt : 3.0 PORTABLE HOT AIR BLOWING EQUIPMENT 3.1 Blow Fan a) KW : b) Volts : 3.2 Heater a) KW : b) Volts : 3.3 Trolley a) Type : 3.4 Flexible hot air duct a) Type : b) Material : c) Length : 3.5 Total weight : Sch-IIIC/5: 6

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