Hoyt Electrical Instrument Works, Inc. Alpha 40A Plus, Operating Manual

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Note
: In case of lo alarm if trip point is set at 100%
then maximum 20% Hysterisis can be set.
Press the “ ” key to scroll the value of the
Press the “ ” key to advance to next digit.
Hysteresis for Frequency
is calculated as % of trip
point span from 45 to 66 Hz. Eg. If trip point is 50%
(55.5 Hz) and hysteresis is set to 10%, then relay will
reset at 49.95 Hz [10% of 55.5 is 5.55 Hz.
Hence, 55.5 - 5.55 = 49.95 Hz]
Similarly, enter second and third digits also.
Delay Time” screen. (See section 3.2.4.1.1.2.5)
Pressing the “ ” key will return to Edit mode.
NOTE: Default value is set to ‘50’.
3.2.4.1.1.2.5 Energizing Delay time
This screen allows the user
to set Energizing Delay time
in seconds for Relay Limit
Assigned Parameters.
Pressing “ ” key accepts the
present value and. advance
to De-energizing delay screen.
Pressing the “ ” key will enter the “Energizing Delay”
Edit mode and scroll the “Value” through 1 to10.
Pressing “ ” key set displayed value & will advance
to Assignment of De-energizing delay time.
(See section 3.2.4.1.1.2.6 )
NOTE: Default value is set to ‘1’.
3.2.4.1.1.2.6 De-Energizing Delay
time
This screen allows the user to set De-Energizing
Delay time in seconds for Relay Limit Assigned
Parameters.
Pressing “ ” key accepts the
present value and jumps back
(See section 3.2.4.1)
Pressing the “ ” key will enter the “De-Energizing
Delay” Edit mode and scroll the “Value” through 1 to10.
Pressing “ ” key set displayed value & will advance
NOTE: Default value is set to ‘1’.
3.2.5.1 Feature Selection Menu
This menu allows the user
to scroll through different
bcLt :
backlit on/off
Scrn :
user screen on/off
Pressing the “ ” key will scroll through the features
backlit, user screen and quit.
Pressing “ ” key will select that particular option.
(See section 3.2.5.1.1 or 3.2.5.1.2)
Selecting “Quit” option will return to “User Assignable
Features” screen. (See section 3.2.5)
3.2.5.1.1 Backlit
This screen allows the user
to switch the backlit on or off.
Pressing the “ ” key will toggle between options
“ON” and “OFF”.
3.2.5 User Assignable Features
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