GE Industrial Solutions ZTSH SERIES 30-4000 AMPS - Manual (Page 18)

■ ■ 16 Zenith Controls, Inc. ■ ■ ZTSH Operation and Maintenance Manual (43R-1000)
Solid State Phase Relay (ARSM)
The pickup and dropout points may be adjusted by
using the following procedure. Use of a variable voltage
supply (Variac) is required. The relay is illustrated in
Figure 9 below.
1. Turn the pickup adjustment fully clockwise.
2. Turn the dropout adjustment fully counter-
clockwise.
3. Set Variac to the desired pickup voltage.
4. Rotate the pickup adjustment counterclock-
wise very slowly until the relay picks up. The
LED will illuminate.
5. Set Variac to the desired dropout voltage.
6. Rotate the dropout adjustment clockwise very
slowly until the relay drops out. The LED will
go out.
7. Verify the setting by raising the voltage until
the relay picks up and lowering the voltage
until the relay drops out.
Pickup Voltage: 75% to 115% of Nominal
Factory Set: 90% of Nominal
Dropout Voltage: 55% to 105% of Nominal
Factory Set: 80% of Nominal
Electronic Time Switch
Z1000-1A
This time switch is used for either the C or
C/D option (See page 7). Instructions for
programming the switch are located inside
the cover of the switch. An indicating light
will appear in the left side of the display to
indicate the time switch is in operation. If
the time switch has a flashing display, it indicates that a power outage has occured. To
restore the display, press the clock key and check the time of day. The battery should be
checked and replaced if necessary
Due to the 10-year memory retention feature, cutting the power to the time switch will not
erase the user’s program. The user’s settings can be changed or cleared st auny time. This fea-
ture eliminates the need for having to reprogram the time switch after long power outages.
The time switch will keep the clock running if power is lost by the installation of a 9 volt
battery. It will not perform any of the programmed operations during a power outage.
Figure 9
Adjustments and Settings
(cont’d)
Figure 10