serial number

Technical requirements

unit

Numerical value

Numerical value

one

rated voltage

kV

seventy-two point five

one hundred and twenty-six

two

rated frequency

Hz

fifty

fifty

three

rated current

A

three thousand one hundred and fifty

three thousand one hundred and fifty

four

Rated breaking current of circuit breaker

kA

forty

forty

five

Rated short-circuit closing current

kA

one hundred

one hundred

six

Initial polar coefficient

one point five

one point five

seven

Rated short-time withstand current

kA

40（4S）

40（4S）

eight

Rated peak withstand current

kA

one hundred

one hundred

nine

Near area fault breaking current

kA

36/30

36/30

ten

Rated out of step breaking current

kA

ten

ten

eleven

Rated short-time power frequency withstand voltage

kV

160 (opposite ground, alternating)

230 (opposite ground, alternating)

202 (fracture surface)

230+73 (fracture surface)

twelve

Rated lightning impulse withstand voltage (peak)

kV

350 (to ground, alternating)

550 (to ground, alternating)

410 (fracture surface)

550+103 (fracture surface)

thirteen

5-minute zero gauge voltage power frequency withstand voltage

kV

eighty-four

ninety-five

fourteen

Rated operating sequence

0-0.3s-C0-180s-C0

0-0.3s-C0-180s-C0

fifteen

closing time

ms

75±8

75±8

sixteen

Opening time

ms

30±5

30±5

seventeen

Total breaking time

≤ 3 cycles

≤ 3 cycles

eighteen

SF6 gas pressure (20 ℃)

MPa

0.6/0.55/0.5

0.6/0.55/0.5

nineteen

Annual SF6 gas leakage rate

%

≤0.5

≤0.5

twenty

Equipped operating mechanism

CT30 Spring Operating Mechanism

CT30 Spring Operating Mechanism

twenty-one

Horizontal and vertical tension of wiring terminals

N

one thousand two hundred and fifty

one thousand two hundred and fifty

twenty-two

Horizontal transverse tension of wiring terminals

N

seven hundred and fifty

seven hundred and fifty

twenty-three

Vertical tension of terminal block

N

one thousand

one thousand