Package #1 : TECHNICAL SCHEDULES

HV300977 rev01

Phu My- Ho Chi Minh City(Phu My - Nha Be - Phu Lam)

500 kV Transmission Line Project package#1substation works

Circuit-Breaker technical description

Written by Approved byName Zanata Larger

Date 28/05/04

Visa

Modification

Rev01

Package #1 : TECHNICAL SCHEDULES

HV300977 rev01

B.1 550 kV CIRCUIT BREAKER

- Name of Manufacturer ________ Nuova Magrini Galileo S.p.A

- Country of origin _______________________________Italy

- Quantity For Phu My S/S set(s) ____________ 15

For Nha Be S/S set(s) _____________ 8

For Phu Lam S/S set(s) _____________ 1

- Type of circuit breaker ___ SF6 PUFFER

- Manufacturer's designation __ 550 MHMe-2Y

- Manufacturing standards __ IEC 62271-100

- Number of phases _____________ 3

- Rated frequency Hz ____________ 50

- Rated voltage kV ___________ 550

- Rated continuous current to IEC 62271-100 A __________ 3150

- Rated insulation level

(a) Power frequency withstand voltage,(to earth/across open breaker poles)

dry, 1 minute kV _______ 620/800

(b) Lightning impulse withstand voltage

(to earth/across open breaker poles) kV __________ 1550

(c) Switching impulse withstand voltage

(to earth/across open breaker poles) kV 1175/900

(+450)

(d) Maximum permissible switching overvoltage

kV ___________ 858

- Rated short-circuit breaking current

(Three phase) :

(a) Symmetrical breaking current kA rms ____________ 50

(b) Asymmetrical breaking current kA rms ____________ 62

(c) Maximum dc component as a percentage of (a) % ____________ 50

(Single phase) :

(d) Symmetrical breaking current kA rms ____________ 50

(e) Asymmetrical breaking current kA rms ____________ 62

- Short circuit making current kA peak ___________ 125

- Short-time withstand currents in accordance with IEC 56

(a) One second kA rms ____________ 50

(b) Three seconds kA rms ____________ 50

- Resistor Values

(a) Opening-per phase Ohms _____________ /

Package #1 : TECHNICAL SCHEDULES

HV300977 rev01

(b) Closing-per phase Ohms _____________ /

- Resistor operating time

(a) Closing pre-insertion time ms _____________ /

- Rated operation duty cycle

0-0,3S-CO-3min-CO

- Number of successive auto-reclosing operations without derating (under

normal service condition) ______ O-CO-CO

- First-phase-to-clear factor ___________ 1,3

- Rated transient recovery voltage at rated short circuit breaking current

(a) Peak Uc kV peak ___________ 817

(b) Rate of rise of restriking voltage kV/µs _____________ 2

- Rated out-of-phase switching capability to IEC 56 kA __________ 12,5

- Rated capacitance current switching capabilities to IEC 56:

(a) Line charging current A ___________ 500

(b) Cable charging current A ___________ 500

(c) Capacitor current A ___________ 400

(d) Number of restrikes RESTRIKE FREE

- Operating time in accordance with IEC 56

(a) Opening time ms ____________ 20

(b) Closing time ms ____________ 65

(c) Maximum arcing time during current interruption ms ____________ 22

(d) Maximum difference in opening time between first and last phase to open

(3 phase) ms _____________ 3

(e) Minimum time for auto reclosing (dead time)

Single phase ms ___________ 300

Three phase ms ___________ 300

(f) Total break time (i.e. time from trip coil energisation to arc extinction in

last phase to clear ms ____________ 40

- Circuit breaker operating mechanism type: (Hydraulic, Spring or Pneumatic)

(a) Closing ELECTROPNEUMATIC

(b) Opening _ ELECTROPNEUMATIC

- Operating power consumption:

(a) Trip coils

current A ________ 1,8/0,9

voltage V _______ 110/220

(b) Closing coil

current A ________ 1,8/0,9

Package #1 : TECHNICAL SCHEDULES

HV300977 rev01

voltage V _______ 110/220

(c) Operating motor

power kW __________ 1500

voltage V ________ 400-3?

(d) Heater current A ___________ 3,1

- Total estimated mass of circuit breaker unit:

(a) One pole kg ____ ˜ 2910/2870

(b) Three pole kg ____ ˜ 8900/8770

- Mass of largest single component kg _____ 2500/2000

- Quantity of gas in circuit breaker

(a) Volume at normal pressure m3 ______ 1,78/1,59

(b) Mass kg _________ 81/72

- Gas leakage per annum % __________ <0,5

- Interrupting gas pressure: (absolute value)

(a) Maximum bar _____________ 7

(b) Normal bar _____________ 7

(c) Minimum bar ___________ 6,5

(d) Alarm “Loss of SF6” bar ___________ 6,6

(e) Trip and lockout bar ___________ 6,5

- Number of close-open operations possible without recharging

_____________ 2

- Number of operations before interrupter maintenance required

(a) at rated short circuit current ____________ 20

(b) at rated current __________ 2000

- Number of years equipment of identical design has been in service

____________ 20

- Number of breaks in series per pole _____________ 2

- Maximum loading to be used for foundation/floor design

(a) Vertical shock-load during operation

at opening kg __________ 8000

and at closing kg __________ 4000

(b) Steady loading kg _____ 8900/8770

- Voltage drop across main contacts of one pole mV ____ 7,5 at 100 A

- Temperature rise of main contacts on continuous operation at rated current,

and at ambient temperature 40°C K __________ 32°C

- Minimum clearance

(a) between phases mm __________ 4740

(b) between live parts and earth mm _________ >3840

Package #1 : TECHNICAL SCHEDULES

HV300977 rev01

- Insulator creepage distance mm ___ 17050/ 13750

* The type test certificate and/or report which has been carried out in

accordance with the requirement of IEC 56 shall be submitted with the this

Tender.

B.2 245 kV Circuit Breaker

- Name of Manufacturer ___________ Nuova Magrini Galileo S.p.A.

- Country of origin _____________________________ ITALY

- Quantity for Nha Be S/S sets _____________ 2

- Type of circuit breaker _ PUFFER TYPE

- Manufacturer's designation _____ SB6m 245

- Manufacturing standards __ IEC 62271-100

- Number of phases _____________ 3

- Rated frequency Hz ____________ 50

- Rated voltage kV ___________ 245

- Rated continuous current A __________ 3150

- Rated insulation level

(a) Power frequency withstand voltage, dry, 1 minutekV ___________ 460

(b) Lightning impulse withstand voltage kV __________ 1050

- Rated short-circuit breaking current:

(Three phase) :

(a) Symmetrical breaking current kA rms ____________ 40

(b) Asymmetrical breaking current kA rms ____________ 46

(c) Maximum dc component as a percentage of (a) % ____________ 40

- Short circuit making current kA peak ___________ 100

- Short-time withstand currents in accordance with IEC 56

(a) One second kA rms ____________ 40

(b) Three seconds kA rms ____________ 40

- Rated operation duty cycle _0-0,3S-CO-3min-CO

- Number of successive auto-reclosing operations without derating (under

normal service condition) ______ 0-CO-CO

- First-phase-to-clear factor ___________ 1,5

- Rated transient recovery voltage at rated short circuit breaking current

(a) Peak Uc kV peak ___________ 420

(b) Rate of rise of restriking voltage kV/µs _____________ 2

- Rated out-of-phase switching capability to IEC 56 kA ____________ 10

- Rated capacitance current switching capabilities to IEC 56:

Package #1 : TECHNICAL SCHEDULES

HV300977 rev01

(a) Line charging current A ___________ 125

(b) Cable charging current A ___________ 250

(c) Capacitor current A ___________ 400

(d) Number of restrikes RESTRIKE FREE

- Operating time in accordance with IEC 56

(a) Opening time ms ____________ 30

(b) Closing time ms ____________ 65

(c) Maximum arcing time during current interruption ms ____________ 22

(d) Maximum difference in opening time between first and last phase to open

(3 phase) ms _____________ 3

(e) Minimum time for auto reclosing (dead time)

Three Phase ms ___________ 300

(f) Total break time (i.e. time from trip coil energisation to arc extinction in

last phase to clear) ms ____________ 50

- Circuit breaker operating mechanism type: (Hydraulic/Spring etc.)

(a) Closing _________ spring

(b) Opening _________ spring

- Operating power consumption:

(a) Trip coils

current kW _________ 0,300

voltage V ___________ 110

(b) Closing coil

current kW _________ 0,300

voltage V ___________ 110

(c) Operating motor

power kW _______ 0,270X3

voltage V ________ 230-1?

(d) Heater current A ___________ 1,5

- Total estimated mass of circuit breaker unit:

(a) One pole kg _________ ˜ 1050

(b) Three pole kg _________ ˜ 3250

- Mass of largest single component kg ___________ 800

- Quantity of gas in circuit breaker

(a) Volume at normal pressure m3 __________ 0.55

(b) Mass kg ____________ 24

- Gas leakage per annum % __________ <0,5

- Interrupting gas pressure: (absolute value)

(a) Maximum bar _____________ 7

Package #1 : TECHNICAL SCHEDULES

HV300977 rev01

(b) Normal bar _____________ 7

(c) Minimum bar ___________ 6,4

(d) Alarm “Loss of SF6” bar ___________ 6,7

(e) Trip and lockout bar ___________ 6,4

- Number of close-open operations possible without recharging ___________ 1

______________

- Number of operations before interrupter maintenance required

(a) at rated short circuit current ____________ 20

(b) at rated current __________ 2000

- Number of years equipment of identical design has been in service

_____________ 1

- Number of breaks in series per pole _____________ 1

- Maximum loading to be used for foundation/floor design

(a) Vertical shock-load during operation

at open _______3000 kg and at close ________ 2000 kg

(b) Steady loading kg __________ 3250

- Voltage drop across main contacts of one pole mV ______4 at 100 A

- Temperature rise of main contacts on continuous operation at rated current,

and at ambient temperature 40°C K __________ 49°C

- Minimum clearance

(a) between phases mm __________ 2810

(b) between live parts and earth mm __________ 1734

- Insulator creepage distance mm _________ >6125

* The type test certificate and/or report which has been carried out in

accordance with the requirement of IEC 56 shall be submitted with the this

Tender.