|
Armature |
The
moving magnetic member of an electromagnetic relay structure |
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. |
|
Capacitance |
The
maximum allowable capacitive coupling between two specified test points |
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. |
|
Coil
Voltage (maximum) |
The
maximum coil voltage which can be applied to the coil over the temperature
range, without damaging the coil. |
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. |
|
Contact
(Form C) |
Break
before Make, or Transfer |
 |
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. |
|
Contact
Bounce |
Intermittent
and undesired opening of closed contacts or closing of open contacts, of a
relay. |
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. |
|
Contact
Bounce Time |
For a
contact which is closing (opening) its circuit, the time internal between
the instant when the contact circuit first closes (opens) and the instant
when the circuit is finally closed (opened). |
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. |
|
Carry
Current |
The
amount of current which can safely flow through closed contacts, when the
contacts are opened and closed with no load applied. |
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. |
|
Cycle |
One
opening and one closure of a contact set |
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. |
|
DPDT |
Double
Pole Double Throw relay |
| |
. |
|
Drop-out
Value |
A
monostable relay drops out when it changes from an energized to an
unenergized condition. |
| |
. |
|
Isolation |
The
value of insulation resistance, dielectric strength and capacitance
measured between the input and outputs. The leakage of an RF signal between
mutually isolated points. |
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. |
|
Low
level Load |
Load
level which will have minimal effect on contact life and performance. |
| |
. |
|
Nominai
Coil Voltage |
The
coil voltage at which the relay is intended to operate. |
| |
. |
|
Operate
Time |
The
interval of time between the application of the operate value and the
first closing (or opening) of the contact circuit. |
| |
. |
|
Pick-up
(Pull-in) Value |
As
the current or voltage on an unoperated relay is increased, the minimum
value at which all contacts will change state. |
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. |
|
Release
Time |
The
interval of time between the application of the release value and the
first opening (or closing) of the contact circuit. |
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. |
|
SPDT |
Single
Pole Double Throw relay. |
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. |
|
Crosstalk |
The
electrical coupling between a closed contact circuit and other open or
closed contacts on the same relay or switch, expressed in decibel down
from the signal level. |
| |
. |
|
Contact
Stabilisation time |
The
interval of time, following operate or release time, to reach and maintain
the static contact resistance value of the relay. It is the sum of the
contact bounce time and the time for dynamic contact resistance to
stabilise to the static contact resistance |
| |
. |
|
VSWR |
Voltage
Standing Wave Radio. A measurement of the reflected RF signal. |
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