TISP7070H3SL THRU TISP7095H3SL, TISP7125H3SL THRU TISP7210H3SL
TISP7250H3SL THRU TISP7400H3SL
TRIPLE BIDIRECTIONAL THYRISTOR OVERVOLTAGE PROTECTORS
MARCH 1999 - REVISED MARCH 2000
APPLICATIONS INFORMATION
deployment
These devices are three terminal overvoltage protectors. They limit the voltage between three points in the
circuit. Typically, this would be the two line conductors and protective ground (Figure 11).
Th3
Th1
Th2
Figure 11. MULTI-POINT PROTECTION
In Figure 11, protectors Th2 and Th3 limit the maximum voltage between each conductor and ground to the
±V
(BO)
of the individual protector. Protector Th1 limits the maximum voltage between the two conductors to its
±V
(BO)
value.
Manufacturers are being increasingly required to design in protection coordination. This means that each
protector is operated at its design level and currents are diverted through the appropriate protector e.g. the
primary level current through the primary protector and lower levels of current may be diverted through the
secondary or inherent equipment protection. Without coordination, primary level currents could pass through
the equipment only designed to pass secondary level currents. To ensure coordination happens with fixed
voltage protectors, some resistance is normally used between the primary and secondary protection. The
values given in this data sheet apply to a 400 V (d.c. sparkover) gas discharge tube primary protector and the
appropriate test voltage when the equipment is tested with a primary protector.
impulse testing
To verify the withstand capability and safety of the equipment, standards require that the equipment is tested
with various impulse wave forms. The table below shows some common values.
PEAK VOLTAGE
STANDARD
SETTING
V
GR-1089-CORE
2500
1000
1500
FCC Part 68
(March 1998)
800
1000
1500
1500
I 31-24
1500
1000
ITU-T K20/K21
1500
4000
4000
VOLTAGE
WAVE FORM
µs
2/10
10/1000
10/160
10/560
9/720 †
(SINGLE)
(DUAL)
0.5/700
10/700
(SINGLE)
(SINGLE)
(DUAL)
PEAK CURRENT
VALUE
A
500
100
200
100
25
37.5
2 x 27
37.5
25
37.5
100
2 x 72
CURRENT
µs
2/10
10/1000
10/160
10/560
5/320 †
5/320 †
4/250
0.2/310
5/310
5/310
5/310
4/250
TISP7xxxH3
A
500
100
250
130
200
200
2 x 225
200
200
200
200
2 x 225
0
0
NA
NA
NA
4.5
6.0
0
NA
SERIES
COORDINATION
RESISTANCE
WAVE FORM 25 °C RATING RESISTANCE
Ω
0
Ω
(MIN).
NA
† FCC Part 68 terminology for the waveforms produced by the ITU-T recommendation K21 10/700 impulse generator
NA = Not Applicable, primary protection removed or not specified.
PRODUCT
INFORMATION
9
POINN [ POWER INNOVATIONS LTD ]
