Triggered Vacuum Gaps
Perkin Elmer's Triggered Vacuum Spark Gaps are ideal high-voltage switches
for applications where a wide operating voltage range is desired. The
low end of the operating voltage range is independent of the Static Breakdown
Voltage (SBV). Operating ranges from 300V to 100kV are possible. Switching
times (from the trigger input to the start of main gap current flow) of
less than 1 microsecond may be achieved when using a suitable trigger.
These switches are commonly used in "crowbar" circuits for protection
against overvoltage conditions. 
Features
- Fast switching operation
- High voltage holdoff
- Ceramic-metal construction
- No warm up period
- High current capability
- Long life
| Type Number |
Status Breakdown Voltage (kV) |
Maximum Peak Current (kA) |
Maximum Conducted Charge per Shot (Coulombs) |
Contains Wall Shield
(Yes/No) |
Contains Mercury
(Yes/No) |
Typical Operating Voltage Range (kV) |
| Notes |
2, 7 |
3 |
4 |
5 |
6 |
|
|
GPV63
|
65
|
50 |
0.5 |
N |
Y |
0.3-50 |
| GPV6301 |
50 |
50 |
0.5 |
N |
Y |
0.3-40 |
| GPV6303 |
120 |
50 |
0.5 |
N |
Y |
0.3-100 |
| GPV6312 |
65 |
50 |
0.5 |
N |
N |
0.3-52 |
| GPV6313 |
100 |
60 |
0.5 |
Y |
N |
0.3-80 |
| GPV6322 |
65 |
60 |
0.5 |
Y |
N |
0.3-50 |
| GPV6323 |
40 |
60 |
0.5 |
Y |
N |
0.3-30 |
| GPV7013 |
40 |
20 |
0.5 |
N |
N |
0.3-32 |
Notes
- The operating characteristics shown here are intended as an
aid to preliminary gap selection. The characteristics listed are
typical for the indicated types under standard environmental conditions.
The conditions found in many applications will influence gap operating
characteristics; therefore, some characteristics may not be simultaneously
achievable. Prospective users of these gaps should be aware of
the limitations in the data being presented.
- SBV is the Static (Self Breakdown Voltage. It is the dc voltage
across the main gap (between the opposite and adjacent electrodes,
O-A) above which the gap is likely to break down (conduct) with
no trigger applied.
- The peak current applies for a critically damped discharge.
Current reversals degrade life, so gap operation in the underdamped
condition should be avoided when possible.
- In underdamped circuits, each current half-cycle contributes
to the total conducted charge, i.e., conducted charge increases
independently of the direction of gap current. Therefore, the
total conducted charge, including any "follow-through" current,
should not exceed the maximum conducted charge indicated.
- Includes an internal shield to slow deposits of discharge debris
on the insulating ceramic.
- A small amount of metallic mercury is used in these gaps to
aid in the formation of the initial discharge. These gaps should
not be operated above 50°C. Care should be exercised in the handling
and disposal of these gaps.
- Proper application of these gaps may require them to be immersed
in insulating oil or gas depending on the operating voltage level
and environmental factors. A method to circumvent electrical breakdown
across the outside surfaces of the ceramic insulators of the gap
may be necessitated in some uses. Some of the more important factors
to consider in determining the insulation qualities of the environment
are altitude (local atmospheric pressure); humidity; dust; cleanliness;
temperature and pulsed versus dc operation.
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