TM5-6115-593-34
NAVFAC P-8-631-34
TO-35C2-3-463-2
Figure 15-4. Undervoltage Relay K115, Test Setup
(e) through (i) with the same results.
(2) Underfrequency relay K116 (4, figure
15-3).
WARNING
HIGH VOLTAGES ARE PRESENT DURING TEST.
(a) Connect relay to test setup as
shown in figure 15-5.
(b) Open switch S1 for 60 Hz test.
(c) Adjust the frequency to 60 Hz and
the input voltage to 120 volts.
Relay contacts should pick up.
Lamp DS1 should light and DS2
should extinguish.
(d) Lower frequency slowly until relay
contacts drop out (lights transfer).
Contacts should drop at 55 Hz
±0.1 Hz.
(e) Close switch S1 for 50 Hz test.
(f) Adjust the frequency to 50 Hz and
the input voltage to 120 volts.
Relay contacts should pick up.
Lamp DS1 should light and DS2
should extinguish.
(g) Lower frequency slowly until relay
contacts drop out (lights transfer).
Contacts
15-5
