background image

 

8-3

 

File Number

 

2492.4

 

1-800-999-9445 or 1-847-824-1188

 

|

 

Copyright

 

 ©

 

 Littelfuse, Inc. 1998

 

AS Series

 

High Energy Metal-Oxide Arrester Blocks

 

The AS Series of Arrester blocks is primarily designed to be 

used as the surge suppression element within a lightning 

arrester assembly. These arrester blocks provide the high 

peak surge current and energy ratings required for the 

protection of high voltage AC power utility distribution 

systems. Typically, these devices are placed within a special 

arrester housing provided by the customer, and stacked to 

achieve the necessary continuous working voltage ratings 

for the specific application. (See the CA or NA series of 

Varistor discs for lower voltage and energy applications.)

 

Features

 

• Provided in Disc Form for Unique Packaging by 

Customer

• Electrode Finish Enables Pressure Contact for Stacking 

Application

• Available Disc Sizes: 32mm, 42mm and 60mm Diameter

• No Follow Current

• High Surge Current Capability

• Conforms to IEC 99-4 and ANSI/IEEE C62.11 Industry 

Standards

• Characterized for Lightning Arrester Parameters

 

Applications

 

• Lightning Protection of Electrical AC Distribution 

Transformers and Systems

• Arrester Assemblies of the Porcelain Polymeric, 

“Under-oil” and Metal Clad Variety

 

Packaging

 

AS SERIES

 

Data Sheet

January 1998

 

[ /Title 

(AS 

Series)

/Sub-

ject 

(High 

Energy 

Metal-

Oxide 

Arreste

Blocks

)

/Autho

r ()

/Key-

words 

(TVS, 

Tran-

sient 

Sup-

pres-

sion, 

Protec-

tion, 

Arreste

r, 

Light-

ning 

Protec-

tion, 

 

Not R

ecom

mended 

For N

ew

 D

esigns –

Pr

oduct S

eries H

as 

Been D

iscontin

ued 

W

ith N

o R

eplacem

ent

OBSOLETE

     PART

background image

 

8-4

 

Absolute Maximum Ratings

 

For ratings of individual members of a series, see Device Ratings and Specifications chart

 

AS SERIES

UNITS

 

Rated Voltage

AC Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.00 to 6.00

kV

Steady State Applied Voltage

AC Voltage (MCOV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.55 to 5.10

kV

Transient

Peak Pulse Current (I

 

TM

 

) for 4/10

 

 µ

 

s Current Wave  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

65 to 100

kA

Energy Rating for 2ms Current Wave  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 to 12

kJ

Operating Ambient Temperature (T

 

A

 

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

60

 

o

 

C

STORAGE AND HANDLING NOTES:

1. Arrester blocks should be stored in a moisture free environment at all times.

2. Use caution during handling to prevent damage or chipping of edges of the arrester blocks.

 

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the

device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

 

Device Ratings and Specifications

 

25

 

o

 

C Unless Otherwise Specified

 

PARAMETER

PART NUMBER

UNITS

V302AS32

V402AS32

V502AS32

V602AS32

V302AS42

V402AS42

V502AS42

V402AS60

 

Rated Voltage (RMS)

3.0

4.0

5.0

6.0

3.0

4.0

5.0

4.0

kV

Maximum Continuous 

Operating Voltage (MCOV)

2.55

3.40

4.25

5.1

2.55

3.40

4.25

3.40

kV

Reference Current, I

 

REF

 

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

mA

Minimum Reference 

Voltage, V

 

REF

 

3.12

4.16

5.20

6.24

3.12

4.16

5.20

4.16

kV

 

RMS

 

Nominal Discharge 

Current, I

 

P

 

 (8/20

 

µ

 

s)

5.0

5.0

5.0

5.0

10.0

10.0

10.0

10.0

kA

Residual Voltage (Max) at 

I

 

 

9.8

13.1

16.3

19.6

10.0

13.3

16.7

12.5

kV

Energy Rating at 60

 

o

 

(2ms)

2.2

2.9

3.6

4.3

3.5

4.7

5.8

12.0

kJ

Peak Current, 4/10

 

µ

 

s at 

60

 

o

 

C (Note 4)

65.0

65.0

65.0

65.0

100.0

100.0

100.0

100.0

kA

Maximum Steep Current 

Residual Voltage at 5kA 

(1/20

 

µ

 

s)

11.3

15.0

18.8

22.5

-

-

-

-

kV

Maximum Steep Current 

Residual Voltage at 10kA 

(1/20

 

µ

 

s)

-

-

-

-

11.5

15.3

19.2

14.4

kV

Maximum Dissipation 

Power at MCOV

0.23

0.30

0.38

0.45

0.36

0.48

0.60

0.50

W

Maximum Conduction 

Current at MCOV

75.0

75.0

75.0

75.0

110.0

110.0

110.0

140.0

 

µ

 

A

NOTES:

3. In addition to above standard types, custom ratings and dimensions can be provided.

4. Parts should be wrapped using a secondary insulating film or encased by polymeric housing.

 

AS Series

OBSOLETE

     PART

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8-5

 

Performance Curves

 

FIGURE 1.  TEMPORARY OVERVOLTAGE CAPABILITY (TOV) 

FOR AS SERIES ARRESTERS

FIGURE 2. V-I CHARACTERISTIC AS32 SIZE

FIGURE 3. V-I CHARACTERISTIC AS42 SIZE

FIGURE 4. V-I CHARACTERISTIC AS60 SIZE

TIME (s)

1.3

1.25

1.2

1.15

1.1

1.05

1

0.1

1

10

100

1000

10000

PER UNIT OF RA

TED 

V

O

L

T

A

G

E

PEAK IMPULSE CURRENT (A)

35

1

0.01

10

0.001

1000

100,000

PEAK RESIDU

AL 

V

O

L

T

A

GE (kV)

10,000

100

20

15

10

5

0

0.1

30

25

V602AS32

V502AS32

V402AS32

V302AS32

PEAK IMPULSE CURRENT (A)

1

0.01

10

0.001

1000

100,000

PEAK RESIDU

AL 

V

O

L

T

A

GE (kV)

10,000

100

20

15

10

5

0

0.1

30

25

V502AS42

V402AS42

V302AS42

PEAK IMPULSE CURRENT (A)

20

1

0.01

10

0.001

1000

100,000

PEAK RESIDU

AL 

V

O

L

T

A

GE (kV)

10,000

100

15

10

5

0

0.1

V402AS60

 

AS Series

OBSOLETE

     PART

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8-6

 

Dimensions

Ordering Information

 

VXXX ASXX TYPES

ELECTRODE

OF SPRAYED

ALUMINUM

PARTICLES

 

D

ELECTRODE

FACE CAMBER

= 0.15mm MAX

PASSIVATION COLLAR

TYPICAL THICKNESS = 0.07mm

= 0.10mm TYPICAL

H

 

DIMENSIONS (IN MILLIMETERS)

PARAMETER

PART NUMBER

UNITS

V302AS32

V402AS32

V502AS32

V602AS32

V302AS42

V402AS42

V502AS42

V402AS60

 

Diameter (

 

 

D)

Min

32.3

32.3

32.3

32.3

40.9

40.9

40.9

60.0

mm

Max

33.7

33.7

33.7

33.7

42.3

42.3

42.3

62.0

mm

Height (H)

Min

20.0

27.0

34.0

41.0

20.0

27.0

34.3

35.3

mm

Max

21.5

28.5

35.5

42.5

21.5

28.5

35.8

36.8

mm

V

30

VARISTOR 

TECHNOLOGY

MCOV BASE VALUE

2

AS

60

DIAMETER SIZE (mm)

MCOV DECADE MULTIPLIER

AS SERIES

ARRESTER SERIES

 

AS Series

OBSOLETE

     PART