TISP61089SD POINN [Power Innovations Ltd], TISP61089SD Datasheet - Page 9

• Manufacturer Part Number: TISP61089SD
• Description: DUAL FORWARD-CONDUCTING P-GATE THYRISTORS PROGRAMMABLE OVERVOLTAGE PROTECTORS
• Manufacturer: POINN [Power Innovations Ltd]

section 4.5.7 - first-level surge testing
section 4.5.8 - second-level surge testing
P R O D U C T
WAVE SHAPE
The two most significant test wave shapes in this section are the high energy 10/1000 and the high current
2/10. As shown in table 1, the peak currents for these surges are 2x20 A and 2x56 A respectively. The
protector must survive the 2x20 A 10/1000 surge and the TISP61089S will do this as its rating is 2x30 A.
When both conductors are surged simultaneously the return (anode) current will be 40 A, again the
TISP61089S will survive this as its rating for this condition will be 60 A. Similarly the TISP61089S will survive
the 2x56 A 2/10 as its rating is 2x120 A.
The highest protection voltage will be for the 56 A 2/10 wave shape. Under this condition the average rate of
current rise will be 56/2 = 28 A/µs. The value of diode and thyristor voltage under this condition is specified in
the electrical characteristics.
Compared to TR-NWT-001089, Issue 1, October 1991, GR-1089-CORE, Issue 1, November 1994, adds the
alternative of using the IEEE C62.41 1.2/50-8/20 combination wave generator for the 2/10 test. This generator
usually has a single output and a fictive resistance of 2 . The 2/10 generator has a fictive output resistance
5 , (2500/500), and GR-1089-CORE compensates for this by adding an extra 3
8/20 generator. In practice, the extra 3
to the 1.2/50 open-circuit voltage wave shape. The TISP61089S will survive the 2x53 A 1.2/50 as its rating is
2x100 A.
Using a 25
TISP61089S will survive these peak current values as they are lower than the TISP61089S ratings.
This is a 2/10 wave shape test. As shown in table 2, the peak current for this surge is 2x100 A. The
TISP61089S will survive the 2x100 A 2/10 surge as its rating is 2x120 A.
Under this condition the average rate of current rise will be 100/2 = 50 A/µs. The value of diode and thyristor
voltage under this condition is specified in the electrical characteristics.
Compared to TR-NWT-001089, Issue 1, October 1991, GR-1089-CORE, Issue 1, November 1994, adds the
alternative of using the IEEE C62.41 1.2/50-8/20 combination wave generator for the 2/10 test. The 2/10
generator has a fictive output resistance 10 , (5000/500), and GR-1089-CORE compensates for this by
adding an extra 8
1.2/50, 8/20
(See Text)
10/1000
10/1000
10/360
2/10
series resistor will result in table 1. I
I N F O R M A T I O N
OPEN-CIRCUIT
in the output of the 1.2/50-8/20 generator. In practice, the extra 8
VOLTAGE
2500
2500
1000
1000
600
V
table 1. first-level surge currents
causes the prospective short-circuit current wave shape to be similar
DUAL FORWARD-CONDUCTING P-GATE THYRISTORS
SHORT-CIRCUIT
CURRENT
PROGRAMMABLE OVERVOLTAGE PROTECTORS
100
100
500
360
100
A
T
column values of 2x83, 2x78, 2x29, 2x19 and 2x29. The
RESISTANCE
GENERATOR
SOURCE
FICTIVE
4 + 3
10
10
5
6
TOTAL CIRCUIT
in the output of the 1.2/50-
RESISTANCE
45
47
50
46
50
TISP61089S
causes the
JULY 1999
2x56
2x53
2x20
2x13
2x20
I
A
T
9