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参数资料
| 型号： | 7665A |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Hydrogen-Filled Ceramic Thyratron |
| 中文描述： | 氢闸流管填充陶瓷 |
| 文件页数： | 2/3页 |
| 文件大小： | 93K |
| 代理商： | 7665A |
MAXIMUM AND MINIMUM RATINGS
(Continued)
Min
Max
Grid
Unloaded grid drive pulse voltage
(see note 4)
.
Grid pulse duration
Rate of rise of grid pulse
(see note 3)
.
Peak inverse grid voltage
Forward impedance of
grid drive circuit .
.
.
.
.
.
.
.
.
.
.
.
.
.
200
600
V
.
2.0
–
m
s
.
.
.
.
.
.
.
.
.
.
.
300
–
V/
m
s
.
–
200
V
.
.
.
.
.
.
50
500
O
Heaters
Cathode heater voltage .
Reservoir heater voltage .
Tube heating time .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
6.3
+
7.5%
6.3
+
7.5%
3.0
V
V
.
.
–
min
Environmental
Environmental performance
Ambient temperature .
Altitude
.
.
.
.
.
.
.
.
.
.
7
55
.
.
.
.
.
.
see note 5
+130
3
10 000
.
.
.
.
8
C
km
.
.
.
–
–
ft
CHARACTERISTICS
Min Typical Max
Critical DC anode voltage for
conduction (see note 6)
Anode delay time
(see notes 6 and 7) .
Anode delay time drift
(see notes 6 and 8) .
Time jitter (see notes 6 and 9) .
Heater current (at 6.3 V)
Reservoir current (at 6.3 V) .
.
.
. –
0.4
1.0
kV
.
.
.
. –
0.25
0.4
m
s
.
.
.
. –
. –
. 3.5
. 1.0
0.05
3.0
4.5
2.0
0.1
5.0
5.5
3.0
m
s
ns
A
A
.
.
.
NOTES
1. This is the maximum forward hold-off voltage imposed on
the thyratron in a pulse modulator circuit. Tubes are tested
at 18 kV peak forward anode voltage with the charging
reactor inductance and pulse forming network capacitance
resonant at 1000 pps For instantaneous starting applications
the maximum permissible peak forward voltage is 16 kV;
this must not be reached in less than 0.04 s and there must
be no overshoot.
2. In pulsed operation the peak inverse anode voltage,
exclusive of a spike of 0.05
m
s maximum duration, must not
exceed 5.0 kV during the first 25
m
s after the pulse.
3. This rate of rise refers to that part of the leading edge of the
pulse between 25% and 75% of the pulse amplitude.
4. Measured with respect to cathode potential.
5. The tube has been designed to withstand the following
tests:
(a)
Vibration
– Vibrated at 10 g in each of 3 planes through
the range 10 to 50 Hz and back again to 10 Hz in 10
minutes whilst looking for resonances in the range 0 to
2000 Hz.
(b)
Long Duration Shock
– Tested at 100 g for 11 ms with 3
blows in each plane.
(c)
High Temperature Test
– Tested at an ambient
temperature
of
150
conditions for 5 hours.
6. The typical figures are obtained on test using conditions of
minimum
grid
drive.
Improved
expected by increasing the grid drive.
7. The time interval between a point on the leading edge of
the unloaded grid pulse at 25% of the pulse amplitude and
the point where anode conduction takes place.
8. Taken as the drift in delay time over an 8-minute run at full
ratings between the second and tenth minutes of operation.
9. The variation of firing time measured at 50% of current
pulse amplitude.
8
C
under
normal
operating
performance
can
be
HEALTH AND SAFETY HAZARDS
e2v technologies hydrogen thyratrons are safe to handle and
operate, provided that the relevant precautions stated herein
are observed. e2v technologies does not accept responsibility
for damage or injury resulting from the use of electronic devices
it produces. Equipment manufacturers and users must ensure
that adequate precautions are taken. Appropriate warning
labels
and
notices
must
be
incorporating e2v technologies devices and in operating
manuals.
provided
on
equipments
High Voltage
Equipment must be designed so that personnel cannot come
into contact with high voltage circuits. All high voltage circuits
and terminals must be enclosed and fail-safe interlock switches
must be fitted to disconnect the primary power supply and
discharge all high voltage capacitors and other stored charges
before allowing access. Interlock switches must not be
bypassed to allow operation with access doors open.
X-Ray Radiation
All high voltage devices produce X-rays during operation and
may require shielding. The X-ray radiation from hydrogen
thyratrons is usually reduced to a safe level by enclosing the
equipment or shielding the thyratron with at least 1.6 mm
(
1
/
16
inch) thick steel panels.
Users and equipment manufacturers must check the radiation
level under their maximum operating conditions.
7665A, page 2
#
e2v technologies
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