Solid
State
Time Delay
Accessories
T, U, W
Solid
State
Timers
Adjustable
in
Seconds,
Minutes
and
Hours
(Plug-In Style}.
To select a time unit, operate the pushbuttons
of
the rightmost
thumbwheel switch until the desired time unit is shown in win-
dow. The time unit can be selected by pushing the plus (
+)
bot-
tom button orthe minus(-} top button. The desired time is specified
by
operating the three thumbwheel switches in the middle of the
front panel.
Close
Differential
(ARSM) Relay
Adjustment
The
voltage points at which the relay operates are adjustable.
When the relay pulls in, an audible click is noticeable, and the
LED will come on.
Setting
the
Relay:
If
the
relayshould be set with a variable voltage supply(Variac):
1.
Turn
pick-up control fully clockwise.
2.
Turn
drop-out control fully counterclockwise.
3.
Set
Variac pick-up voltage to desired level.
4.
Very
slowly
rotate pick-up adjustment counterclockwise until
relay picks up. (LED will energize}.··
5.
Set
Variac drop-out voltage to desired level.
6.
Very
slowly
rotate drop-out adjustment clockwise until relay
drops
out (LED de-energizes). ,
Verify settings
by
raising voltage until relay picks up, then lower
voltage until relay drops out, making sure that relay operates at
desired voltage levels.
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VOLTAGE/FREQUENCY SENSOR (VFSM) ADJUSTMENT
The
pickuppointmaybe adjusted between 80-95% ofrated voltage
by
rotating the offset screw located on the back
of
the relay.
Counter-clockwise rotation increases pickup voltage. Clockwise
rotation decreases pickup voltage.
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