System

Nominal

voltage

kV

(Effective value)

Rated high voltage of lightning arrester (kV)

(Effective value)

lightning arrester

Continuous operation

Line voltage

Large kV

(Effective value)

DC 1mA reference voltage

≮kV

(Effective value)

2ms

Square wave current capacity

A

Residual pressure

Umbrella diameter

φ

mm

height

H

mm

Figure number

remark

Lightning impulse current

Steep wave impulse current

Operating impulse current

KV (peak value) ≯

Y5WD-4/9.5

three point one five

four

three point two

five point seven

four hundred

nine point five

ten point seven

seven point six

one hundred

two hundred and twenty

1-10

For generators

YH5WD-4/9.5

ninety

one hundred and eighty-four

1-2

YH5WD-4/9.5DL

ninety

one hundred and eighty-four

1-2

Y5WD-8/18.7

six point three

eight

six point three

eleven point two

four hundred

eighteen point seven

twenty-one

fifteen

one hundred

two hundred and twenty

1-10

YH5WD-8/18.7

ninety

one hundred and eighty-four

1-2

YH5WD-8/18.7DL

ninety

one hundred and eighty-four

1-2

Y5WD-13.5/31

ten point five

thirteen point five

ten point five

eighteen point six

four hundred

thirty-one

thirty-four point seven

twenty-five

one hundred

two hundred and seventy

1-10

YH5WD-13.5/31

ninety

two hundred and fifty-seven

1-2

YH5WD-13.5/31DL

ninety

two hundred and fifty-seven

1-2

Y5WD-17.5/40

thirteen point eight

seventeen point five

thirteen point eight

twenty-four point four

four hundred

forty

forty-four point eight

thirty-two

one hundred

two hundred and seventy

1-10

YH5WD-17.5/40

ninety

two hundred and fifty-seven

1-2

YH5WD-17.5/40DL

ninety

two hundred and fifty-seven

1-2

Y5WD-20/45

fifteen point seven five

twenty

fifteen point eight

twenty-eight

four hundred

forty-five

fifty point four

thirty-six

one hundred

three hundred and fifty-five

1-10

YH5WD-20/45

ninety

two hundred and fifty-seven

1-2

YH5WD-20/45DL

ninety

two hundred and fifty-seven

1-2

Y5WD-23/51

eighteen

twenty-three

eighteen

thirty-one point nine

four hundred

fifty-one

fifty-seven point two

forty point eight

one hundred

three hundred and fifty-five

1-10

YH5WD-23/51

ninety

two hundred and fifty-seven

1-2

YH5WD-23/51DL

ninety

two hundred and fifty-seven

1-2

Y5WD-25/56.2

twenty

twenty-five

twenty

thirty-five point four

four hundred

fifty-six point two

sixty-two point nine

forty-five

one hundred

three hundred and fifty-five

1-10

YH5WD-25/56.2

ninety

three hundred and fifty-five

1-5

YH5WD-25/56.2DL

ninety

three hundred and fifty-five

1-6