Rapid Selection for High Voltage Relays
Rapid Selection for High Voltage Relays
We developed special relays for different applications. The chart below provides a comparison of dielectrics and contact materials and how they perform in different applications. You can rapidly confirm the type of relays you need by the chart.
|
Application
|
SF6 Gas
|
SF6 Gas
|
Vacuum
|
Vacuum
|
|
|
Tungsten/Moly
|
Copper
(Special Applications)
|
Tungsten/Moly
|
Copper
|
|
Carry Only
(DC)
|
GOOD
but the gas increases the contact resistance resulting in less current being carried than in vacuum
|
BETTER
than hard contacts but the gas increases the contact resistance resulting in less current being carried than in vacuum
|
GOOD
but not as much current as copper contacts
|
BEST
|
|
Carry Only
(RF)
|
NO
the gas will interfere with the RF carry capabilities
|
NO
the gas will interfere with the RF carry capabilities
|
GOOD
but not as much current as copper contacts
|
BEST
|
|
Make & Break
Does not apply to GuoLi reed relays
|
GOOD
for make but only low currents on break
|
GOOD
for make but only low currents on break
|
BEST
|
FAIR
extremely low currents only
|
|
Make Only
Contact GuoLi for specific make and break realy ratings in your application
|
BEST
|
BETTER
but not as good as hard contacts
|
GOOD
but not as much current as copper contacts
|
FAIR
extremely low currents only
|
|
Long Periods of Non-Use
Or where
Low and Stable Leakage Current
is Needed
|
BEST
only relays listed
"Make only"
|
BETTER
than hard contacts but the gas increases the contact resistance resulting in less current being carried than in vacuum
|
GOOD
generally will"burp" when HV is applied
|
FAIR
generally will"burp" when HV is applied
|
|
Details for Selection
After confirm the approximate type of relays, the particular parameters are needed for selecting right relays. Basic principle for different applications are shown as the following:
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DC or Low Frequency Non Power Switching Application
If your application does not require power switching, the maximum voltage and current of the relays should be primarily considered, it is easy to select relays according to high voltage relay summary. Please note that the voltage in the specification is peak voltage, DC or 50Hz (60Hz).
Voltage and continuous current values are shown in high voltage relay summary for the relays that can work in RF application. From the chart, you can find right relay rapidly. If you would like to know the relay in detail, please visit www.hertzec.com
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Power Switching Applications
Power switching applications are complicated for relays and need to analyze working conditions. The applications include make or break AC and DC power, charge or discharge capacitor, please contact GuoLi for support.
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