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5.7.3 General specifications of fixed circuit-breakers

with rh lateral operating mechanisms for ABB UniMix switchgear (12 - 17.5 - 24 kV)

Circuit-breaker HD4/UniMix 12 HD4/UniMix 17 HD4/UniMix 24

Standards

IEC 62271-100

• • •

CEI EN 62271-100

(dossier 7642)

• • •

Rated voltage Ur[kV] 12 17.5 24

Rated insulation voltage Us[kV] 12 17.5 24

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

Impulse withstand voltage Up[kV] 75 95 125

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

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

Rated duty breaking capacity

(symmetrical rated short-circuit current)

Isc[kA]

12.5 12.5 12.5

16 16 16

20 20 20

(5)

– –

Short-time withstand current (3 s)

Ik[kA]

12.5 12.5 12.5

16 16 16

20 20 20

25 – –

Making capacity

Ip[kA]

31.5 31.5 31.5

40 40 40

50 50 50

63 – –

Sequence of operations [O-0.3s-CO-15s-CO]

• • •

Opening time [ms] 45 45 45

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

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

Closing time [ms] 80 80 80

Overall dimensions

(maximum)

H[mm] 734.5 734.5 734.5

L[mm] 393.5 393.5 393.5

D[mm] 1049 1049 1049

Polecenter-distance[mm] 230 230 230

Weight

(3)

[kg] 103 103 103

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

Application of PR521 protection device In[A]

40 - 80 - 250 - 1250

(2)

40 - 80 - 250 - 1250

(2)

40 - 80 - 250 - 1250

(2)

Application of REF 601 protection device

•

(3)

•

(3)

•

(3)

Standardized dimensions table

TN 7366

(4)

TN 7366

(4)

TN 7366

(4)

1VCD003396

(5)

1VCD003396

(5)

1VCD003396

(5)

Wiring diagram without relay / with PR521 1VCD400017

(4)

1VCD400017

(4)

1VCD400017

(4)

1VCD400018

(5)

1VCD400018

(5)

1VCD400018

(5)

with REF 601

1VCD400114

(4)

1VCD400114

(4)

1VCD400114

(4)

1VCD400116

(5)

1VCD400116

(5)

1VCD400116

(5)

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

Tropicalization IEC:60068-2-30,60721-2-1

• • •

Electromagnetic compatibility IEC 62271-1

• • •

((1)

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)

(2)

rated current of the current sensors (the PR521 device and the current sensors are available on request)

(3)

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  

(4)

HD4/UniAir for Unit P1/F (unit with plug-in circuit-breaker)

(5)

HD4/UniAir-2R for Unit P1E/2R (unit with plug-in circuit-breaker on the supply and load sides)

(6)

HD4/UniAir-A for Unit P1/A (unit with ﬁxed “upside-down” circuit-breaker)

(7)

HD4/UniAir-FforP1/FUnit(unitwithxedcircuit-breakerwithoutwheelsandcabledtoterminalbox);the12-17.5-24kVtypesavailableare630A,12.5and16kAonly

(8)

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