GE Industrial Solutions ZTSH SERIES 30-4000 AMPS - Manual (Page 17)

■ ■ Zenith Controls, Inc. 15 ■ ■ ZTSH Operation and Maintenance Manual (43R-1000)
Solid State Timers
Solid state timers are adjustable from 0.1
second to 100 hours. The red timing indicator
in the upper left corner flashes as the timer
progresses through the timing cycle. When
the timing cycle is completed, the indicator
remains illuminated. A flathead screwdriver
is required to change the setting, as shown in
Figure 7.
The time unit is selected by turning the rotary
switch at the lower right of the timer. Four
selections are available: “Seconds”, “Minutes”,
“Hours”, “10 Hours”. The time unit selected
is displayed in the window below the time
setting dial.
The time range is selected by turning the rotary switch at the lower left of the timer. Four
ranges are available: “0-0.5”, “0-1.0”, “0-5.0”, “0-10.0”. The dial digits appear in the windows
around the time setting knob.
Figure 7
The factory setting of the solid state timers
used in the Zenith standard package are
shown in Table 4.
Voltage/Frequency
Sensor (VSFM)
The pickup point may be adjusted by rotating the
adjustment screw as shown in Figure 8 below.
Counter-clockwise rotation increases the
pickup voltage.
Pickup Voltage (at 100% Frequency)
Adjustable: 80% to 95%
Factory Set: 90%
Pickup Frequency
Adjustable: 80% to 100%
Factory Set: 95%
Timer
T
U
W
30 minutes
5 minutes
1 second
Table 4
Figure 8
Adjustments and Settings
CAUTION
Do NOT change the setting while the timer is energized. Timer malfunction or damage may occur.
Factory Setting