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5.7 Circuit-breaker speciﬁcations

5.7.1 General specifications of fixed circuit-breakers

with rh lateral operating mechanisms (12 - 17.5 - 24 -36 kV)

Circuit-breaker HD4/R 12 HD4/R 17 HD4/R 24 HD4/R 36

Standards

IEC 62271-100

• • • •

CEI EN 62271-100

(dossier 7642)

• • • •

Rated voltage Ur[kV] 12 17.5 24 36

Rated insulation voltage Us[kV] 12 17.5 24 36

Withstand voltage at 50 Hz Ud(1min)[kV] 28 38 50 70

Impulse withstand voltage Up[kV] 75 95 125 170

Rated frequency fr[Hz] 50-60 50-60 50-60 50-60

Rated thermal current (40°C) Ir[A] 630 800 1250 630 800 1250 630 800 1250 630 800 1250

Rated duty breaking capacity

(symmetrical rated short-circuit current)

Isc[kA]

12.5 – – 12.5 – – 12.5 – – 12.5 12.5 12.5

16 16 16 16 16 16 16 16 16 16 16 16

20 20 20 20 20 20 20 20 20 – – –

25 25 25 – – 25 – – – – – –

Short-time withstand current (3 s)

Ik[kA]

12.5 – – 12.5 – – 12.5 – – 12.5 12.5 12.5

16 16 16 16 16 16 16 16 16 16 16 16

(6)

20 20 20

(6)

20 20 20

(6)

20 20 – – –

25 25 25 – – 25 – – – – – –

Making capacity Ip[kA]

31.5 – – 31.5 – – 31.5 – – 31.5 31.5 31.5

40 40 40 40 40 40 40 40 40 40 40 40

50 50 50 50 50 50 50 50 50 – – –

63 63 63 – – 63 – – – – – –

Sequence of operations

[O-0.3s-CO-15s-CO]

• • • •

Opening time [ms] 45 45 45 45

Arcing time [ms] 10...15 10...15 10...15 10...15

Total break-time [ms] 55…60 55…60 55…60 55…60

Closing time [ms] 80 80 80 80

Overall dimensions

(maximum)

H[mm] 764.5 764.5 764.5 810

L[mm] 321 321 321 409

D[mm] 1049

(1)

/ 1189

(2)

1049

(1)

/ 1189

(2)

1049

(1)

/ 1189

(2)

1348

Polecenter-distance[mm] 230 / 300 230 / 300 230 / 300 350

Weight

(3)

[kg] 103

(1)

- 105

(2)

103

(1)

- 105

(2)

103

(1)

- 105

(2)

110

Absolute gas pressure (nominal duty value) [kPa] 380 380 380 380

Application of PR521 protection device In[A] 40-80-250-1250

(4)

40-80-250-1250

(4)

40-80-250-1250

(4)

–

Application of REF 601 protection device

•

(5)

•

(5)

•

(5)

–

Standardized dimensions table

TN 7237

(1)

TN 7237

(1)

TN 7237

(1)

TN 7238

TN 7234

(2)

TN 7234

(2)

TN 7234

(2)

Wiring diagram without protection

device installed

1VCD400017 1VCD400017 1VCD400017 1VCD400017

with PR521 1VCD400017 1VCD400017 1VCD400017 –

with REF 601 1VCD400114 1VCD400114 1VCD400114 –

Operating temperature [°C] - 5 ... + 40 - 5 ... + 40 - 5 ... + 40 - 5 ... + 40

Tropicalization

IEC:60068-2-30,60721-2-1

• • • •

Electromagnetic compatibility IEC 62271-1

• • • •

(1)

230 mm pole center-distance

(2)

300 mm pole center-distance

(3)

increase the indicated weight by 20 kg for circuit-breakers with PR521 / REF 601 devices and 3 current sensors (15 kg only with 2 current sensors)

(4)

ratedcurrentofthecurrentsensors(thePR521deviceandthecurrentsensorsareavailableonrequest);at24kV,only2currentsensorsforPR521(installedonthecircuit-breaker’s

lateral poles) can be used with 230 mm center-distance between poles

(5)

the REF 601 device and the current sensors are available on request. The rated current of the REF 601 must be set in the relay and must be compatible with the rated current of the

circuit-breaker.TheratedcurrentthatcanbesetwithCEI0-16is80Aor250A.WiththeCEI0-16versionofREF601,thecircuit-breakerisalwayssuppliedwith3phasesensors

(Rogowskycoils)onthecircuit-breakeritself,one40/1Aclosed-coretoroidalTAanda-MUundervoltagereleaseforrelay-controlledopening

(6)

at12and17.5kVandat630Aratedcurrent,theratedshort-timewithstandcurrentis20kAfor1second     