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
±V
of the individual protector. Protector Th1 limits the maximum voltage between the two conductors to its
value.
(BO)
(BO)
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
SETTING
V
VOLTAGE
WAVE FORM
µs
PEAK CURRENT
CURRENT
TISP7xxxH3
SERIES
COORDINATION
RESISTANCE
Ω (MIN).
STANDARD
VALUE
A
WAVE FORM 25 °C RATING RESISTANCE
µs
A
500
Ω
2500
2/10
500
2/10
GR-1089-CORE
0
NA
1000
10/1000
10/160
100
10/1000
10/160
10/560
5/320 †
5/320 †
4/250
100
1500
200
250
800
10/560
100
130
FCC Part 68
(March 1998)
1000
9/720 †
(SINGLE)
(DUAL)
0.5/700
10/700
25
200
0
NA
1500
37.5
2 x 27
37.5
25
200
1500
2 x 225
200
I 31-24
1500
0.2/310
5/310
0
0
NA
NA
NA
4.5
6.0
1000
200
1500
(SINGLE)
(SINGLE)
(DUAL)
37.5
100
5/310
200
ITU-T K20/K21
4000
5/310
200
4000
2 x 72
4/250
2 x 225
† 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.
P R O D U C T
I N F O R M A T I O N
9
POINN [ POWER INNOVATIONS LTD ]
