1
Scope
2
Definitions
3
Environmental conditions
4 Electrical characteristics
4.1 Spark-over voltages (see 5.1, 5.2
and Figures 1, 2 and 3)
4.2 Holdover voltages (see 5.5 and
Figures 4 and 5)
4.3 Insulation resistance (see 5.3)
4.4 Capacitance
4.5 Impulse transverse voltage - 3-electrode tubes (see 5.9 and
Figure 6)
4.6 Life tests (see 5.6, 5.7 and 5.8)
4.6.1 Test currents
4.6.2 Requirements during life test
4.6.3 Requirements after completion of life test
4.7 Short-circuit behaviour
5 Test methods
5.1 d.c. spark-over voltage (see 4.1
and Figures 1 and 2)
5.1.1 Initial values
5.1.2 After life test
5.2 Impulse spark-over voltage (see
4.1 and Figures 1 and 3)
5.3 Insulation resistance (see 4.3)
5.4 Capacitance (see 4.4)
5.5 Holdover test (see 4.2)
5.5.1 2-electrode gas discharge tube (see Figure 4)
5.5.2 3-electrode gas discharge tube (see Figure 5)
5.6 Impulse life – All types of gas
discharge tube (see 4.6)
5.6.1 Impulse
discharge current 8/20 ms
5.6.2 Impulse discharge current 10/350 ms
5.6.3 Impulse discharge current 10/1000 ms
5.7 A.c. life – All types of tube (see
4.6)
5.8 Short-circuit test
5.9 Impulse transverse voltage (see
4.5 and Figure 6)
6
Radiation
7
Environmental tests
7.1 Robustness of terminations
7.2 Solderability
7.3 Resistance to soldering heat
7.4 Vibration
7.5 Damp heat cyclic
7.6 Sealing
7.7 Low temperature
8 Identification
8.1 Marking
8.2 Documentation
9 Ordering information
Annex A - Test
circuit for GDT for ISDN
Appendix I -
Definitions of terms associated with gas discharge tubes
Appendix II - Type
test procedure
II.1 Impulse and a.c. life
II.2 Short-circuit