 Triggered Spark Gaps
Perkin Elmer's Triggered Spark Gaps are a family of versatile high voltage
switches. They consist of three electrodes in a hermetically sealed, pressurized
ceramic envelope. Triggered Spark Gaps are generally characterized by
a peak current capability of thousands to tens of thousands of amperes,
delay times of tens of nanoseconds, arc resistance of tens of milliohms
and inductance of 5 to 30 nanohenries. They are suitable for capacitor
switching applications such as flashlamps, electrically pumped gas lasers,
medical lithotripters, and as crowbar protection devices.
Features:
- Fast switching operation
- High voltage holdoff
- Ceramic-metal construction
- No warm up period
- High current capability
- Long life
| Model Number |
O-A Range, (kV) Min/Max (1-10) |
SBV (kV) |
VT Minimum Trigger (kV Open Circuit) |
Trigger Mode |
Recmmended Transformer |
Typical Maximum Delay Time
(Nanoseconds) |
Simultaneous Ratings Crowbar Service
Typical Life: 5,000-20,000 Shots |
Simultaneous Ratings Repetitive Switching
Typical Life: 1-5 Million Shots |
| |
(2) |
(3) |
(4) |
(5) |
|
(6, 7) |
|
|
(11) |
(11) |
| GP-89 |
0.7 |
2.1 |
2.6 |
10 |
C |
TR-148A |
100 |
1000 |
5 kA peak
0.1 coulomb |
3 millicoulombs/shot
4 millicoulombs/shot |
| GP-90 |
1.3 |
3.4 |
4.2 |
|
C |
TR-180B |
| GP-91 |
4.4 |
10 |
12.5 |
|
A,C |
|
| |
| GP-82B |
0.4 |
1.6 |
2 |
|
A,B |
TR-148A
TR-180B |
100 |
1000 |
0.1 coulomb |
lb = 60 mAdc
lp = 8 Aac
4 millicoulombs/shot |
| GP-31B |
2 |
6 |
7.5 |
10 |
A |
| GP-20B |
3.5 |
11 |
14 |
|
| GP-46B |
8 |
20 |
25 |
|
| |
| GP-85 |
2 |
6 |
8 |
10 |
A,B |
TR1795
TR-180B
TR-1700 |
30 |
300 |
25 kA peak
0.4 coulomb |
4 millicoulombs/shot
lb=100 mAdc
lp=10 Aac |
| GP-86 |
6 |
15 |
20 |
20 |
A |
| GP-87 |
10 |
24 |
30 |
20 |
| GP-70 |
12 |
36 |
42 (8) |
20 |
| |
| GP-30B |
2 |
6 |
7.5 |
20 |
A,B |
TR-1795
TR-1700 |
30 |
300 |
50 kA peak
0.5 coulomb
Peak currents up to 100 kA and charge transfer up to 5 coulombs are obtainable at reduced life (100-1000 shots) |
10 millicoulombs/shot
lb=200 mAdc
lp=15 Aac |
| GP-22B |
6 |
15 |
19 |
20 |
A |
| GP-12B |
10 |
24 |
30 |
20 |
| GP-14B |
12 |
36 |
42 (8) |
20 |
| |
| GP-41B |
12 |
36 |
42 |
20
20
20 |
A,B |
TR-1795
TR-1700 |
30 |
300 |
| GP-32B |
20 |
48 |
60 (8) |
A |
| GP-15B |
25 |
60 |
86 (8) |
| GP-74B |
40 |
100 |
120 (8) |
20
20 |
A |
TR-1795
TR-1700 |
30 |
300 |
| GP-81B |
40 |
100 |
120 (9) |
NOTES:
- Optimum operating voltage is typically 60 to 80% of SBV.
- Operation below minimum value may result in erratic firing over time.
- Operation at this value may result in self-firing over time.
- Represents minimum main-gap breakdown voltage with no trigger applied.
- Value shown contains safety factor for end-of-life requirements.
- Perkin Elmer IA Trigger Module can be used to trigger all gaps.
- Transformers listed vary mechanically and electrically.
- These units must be operated in a liquid or gas dielectric to prevent external flashover: GP-70 and GP-14B, above 24 kV; GP-32B and
GP-15B, above 35 kV; GP-74B and GP-81 B, above 60 kV.
- Designed for high altitude, high holdoff conditions.
- Other voltage ranges and mechanical configurations are available on request; for example, the GP-20B can be supplied with a 6 to
16 kV operationg range by specifying GP-20B-20. The 20 would be the SBV and E-E maximum would be 80% of SBV = 16 kV.
- E = Stored energy in joules (/2Cv2)I
lb = average current in amperes,
lp = RMS current in amperes,
R = total circuit resistance in ohms
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