TISP61089AD Просмотр технического описания (PDF) - Power Innovations Ltd

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TISP61089AD

DUAL FORWARD-CONDUCTING P-GATE THYRISTORS PROGRAMMABLE OVERVOLTAGE PROTECTORS

Power Innovations Ltd 

TISP61089A

DUAL FORWARD-CONDUCTING P-GATE THYRISTORS

PROGRAMMABLE OVERVOLTAGE PROTECTORS

JUNE 1999

table 2. second-level surge current

WAVE SHAPE

2/10

1.2/50, 8/20

(See Text)

OPEN-CIRCUIT

VOLTAGE

V

5000

5000

SHORT-CIRCUIT

CURRENT

A

500

420

GENERATOR

FICTIVE

SOURCE

RESISTANCE

Ω

10

4 + 8/conductor

TOTAL

CIRCUIT

RESISTANCE

Ω

50

52

IT

A

2x100

2x96

prospective short-circuit current wave shape to be similar to the 1.2/50 open-circuit voltage wave shape. The

TISP61089A will survive the 2x96 A 1.2/50 as its rating is 2x100 A.

Using a 25 Ω series resistor will result in table 2. IT column values of 2x143 and 2x135. The TISP61089A may

fail at these peak current values as they are higher than the TISP61089A ratings.

section 4.5.9 - Intra-building surge testing

These tests use a 2/10 wave shape. As shown in table 3, the peak currents for this test are 2x27 A and 17 A.

The TISP61089A can survive both these levels as its rating is 2x120 A.

table 3. intra-building surge currents

WAVE SHAPE

2/10

1.2/50, 8/20

(See Text)

OPEN-CIRCUIT

VOLTAGE

V

1500

800

1500

800

SHORT-CIRCUIT

CURRENT

A

100

100

94

100

GENERATOR

FICTIVE

SOURCE

TOTAL CIRCUIT IT

RESISTANCE

RESISTANCE

Ω

A

Ω

15

55

2x27

8

48

17

4 + 12/conduc-

56

2x27

tor

2+6

48

17

Compared to TR-NWT-001089, Issue 1, October 1991, GR-1089-CORE, Issue 1, November 1994, the 2/10

alternative of using a CCITT Recommendation K.22 1.2/50-8/20 combination wave generator has been

changed to an IEEE C62.41 1.2/50-8/20 generator. This generator usually has a single output and a fictive

resistance of 2 Ω. The 2/10 generator has fictive output resistances of 15 Ω and 8 Ω. GR-1089-CORE

compensates for this by adding an extra resistances of 12 Ω and 6 Ω in the output of the 1.2/50-8/20

generator. In practice, this extra resistance causes the prospective short-circuit current wave shape to be

similar to the 1.2/50 open-circuit voltage wave shape. The TISP61089A will survive the 2x27 A 1.2/50 as its

rating is 2x100 A.

Using a 25 Ω series resistor will result in table 3. IT column values of 2x38, 24, 2x37 and 24. The TISP61089A

will survive these peak current values as they are lower than the TISP61089A ratings.

PRODUCT INFORMATION

10

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