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TAMCO 11kV SF6 RING MAIN UNIT SCHEDULE OF TECHNICAL DATA Item no. 1 Description Ratings & Electrical Requirements General Details (Ring Main Unit) Manufacturer's Name Typical layout and sectional drawing of Switchgear supplied to Australian environment Ring Main Model No Designation Type 2 Applicable Standards Enclosure Circuit Breaker Current Transformers 3 General Performance Rated Frequency Rated Voltage Highest Voltage Rated Insulation Level: 4.1 One minute power frequency withstand voltage 4.2 Impulse withstand Rated Short Time Current Rated Duration of Short Circuit time Internal Arc Fault Performance Time kV (RMS) kV (Peak) kA Sec kA Sec 28 95 20 3 20 1 ( with Bursting Plate and Arc Chutes fitted) IEC 62271:200 Rotating Arc Hz kV (RMS) kV 50 11 12 TAMCO See item 12 GR1 METAL ENCLOSED IEC 62271:200 IEC 62271:200 IEC 62271:100 AS 60044.2

Unit

Performance Data*

Standard Method of Arc Extinction 4 Earth Switches Type

Rated Short Circuit Making Current Operation Extensible Padlockable 5 Busbars and Connectors Rated Normal Current of: CB Load Break Ring Switch Busbar

kA

INTEGRAL & COMBINED WITH CIRCUIT SWITCH OR CB 20 FOR 3 SECONDS MANUAL YES YES

. A A A 630 630 630

Tamco 11kV Ring Main Unit Options *Note: Some parameters may be subject to change without notice

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TAMCO 11kV SF6 RING MAIN UNIT SCHEDULE OF TECHNICAL DATA 6 Enclosure Material Behind Closed Door Operation MILD STEEL (STAINLESS STEEL ENCLOSURE OPTIONAL) YES IP54 NO CED SYSTEM CODE NO 631 TO BS 381C SEMI GLOSS FINISH

Whether switchgear is extensible Degree of Protection Whether Space Heater is provided in the Switchgear Paint Finish

7

Circuit Breakers Type of Circuit Breaker (i.e. whether Vacuum of SF6) Model No Type Normal Rated current Type of Operation A SF6 GR1-01 ROTATING ARC 630 STORED ENERGY, MANUAL ( MOTORISED OPTION AVAILABLE) VIA CT OR TIME LAG FUSE EITHER: TIME LAG FUSES or SELF POWERED RELAY OC & EF VIA CT or OC & EF RELAY WITH EXTERNAL DC SUPPLY Electrical Endurance of Circuit Breaker Mechanical Endurance of Circuit Breaker Short Circuit Breaking Current kA kA Short Circuit Withstand Current Total Break time Closing time Rated SF6 Gas filling Pressure (relative to CB) Minimum SF6 Gas filling Pressure for normal operation Whether facilities are provided for Gas pressure monitoring Whether Gas pressure monitoring facilities are temperature compensated In case of low Gas pressure can Gas be topped up? Can Circuit Breaker withstand the system voltage at atmospheric gas pressure? kA ms ms bar bar E1 TO IEC 62271:100 M1 TO IEC 62271:100 20 (SYMMETRICAL) 20 (ASYMMETRICAL) 20KA FOR 3 SECONDS < 50 < 50 1.89 1.2 YES YES YES YES

Method of Tripping Type of Protection

Tamco 11kV Ring Main Unit Options *Note: Some parameters may be subject to change without notice

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TAMCO 11kV SF6 RING MAIN UNIT SCHEDULE OF TECHNICAL DATA Can Circuit Breaker be operated safely (load make/break) at atmospheric gas pressure? Whether Auxiliary contacts are provided for status indication of CB Voltage Drop across main contact at rated current Maximum Transformer rating connectable to CB at 11 & 6.6kV Whether facilities are provided for padlocking Partial Discharge level at 1.1Um 8 Load Break Switch (or Ring Switch) Type or Reference Rated Voltage Rated Frequency Rated Normal Current Method of Closing Electrical Endurance of Circuit Breaker Mechanical Endurance of Circuit Breaker Rated Short Circuit Making Current Breaking Capacity kA kA kV Hz A GRI-10 11 50 630 MANUAL E1 TO IEC 62271:100 M2 TO IEC 62271:100 20 20 (SYMMETRICAL) 20 (ASYMMETRICAL) Rated short time withstand current & time Rated No ­ load transformer breaking current 9 Busbar and Connectors Material of Busbar and Connector Cross-sectional Area of Busbars 10 11 Dimensions and Weights Cable Box Type of Cable Box Phase to Phase clearances in Cable Box Phase to Earth clearances in Cable Box Phase to Earth Over Insulator Surface (creepage distance) Type of Cable Termination suited mm mm mm AIR INSULATED 147 110 120 HEAT SHRINK (RAYCHEM OR EQUIVALENT) mm2 BOLTED COPPER 240 STANDARD DRAWINGS ATTACHED kA kA 20KA FOR 3 SECONDS 20 PC mV kVA YES YES < 10 3,000 YES < 10

Tamco 11kV Ring Main Unit Options *Note: Some parameters may be subject to change without notice

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TAMCO 11kV SF6 RING MAIN UNIT SCHEDULE OF TECHNICAL DATA 12 Other Details Various Configurable & Extension options available Most common configurations available: (a) 1 Load Break Switch only (b) 1 CB only (c) 2 Load Break Switches & 1 CB (d) 2 Load Break Switches & 2 CBs (e) Other extensible configurations possible using (a), (b) & (c) above and with use of 400mm long section of busbar extension Note: E Note: NE means means Model No Model No Model No Model No GR1-10E

(DRG NO G0452-01)

YES

GR1-01E (DRG NO G0450-01) GR1-21E (DRG NO G0450-01) GR1-22NE (DRG NO G0451-01) YES

EXTENSIBLE NON EXTENSIBLE

Tamco 11kV Ring Main Unit Options *Note: Some parameters may be subject to change without notice

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