|
STANDARD
FEATURES
-
Motor
load transfer controls (inphase monitor) to keep motors operating during
transfer.
-
Pre-transfer & post-transfer load disconnect contacts for signaling
motor starters, elevators, VFDs and other selected loads.
-
Standard
Engine Exerciser for weekly automatic testing of engine generator set
with or without load.
-
Selectable control switches for voltage, frequency, time delay settings
& additional control features.
-
Switch
position lights, source availability lights, test switch and time delay
bypass switch.
TIME DELAYS
-
Adjustable time delay to over ride momentary normal source outages to
delay all transfer switch and engine-starting signals.
-
Transfer
to emergency time delay. Adjustable from 0 to 5 minutes for controlled
timing of load transfer to emergency.
-
Retransfer to normal time delay. Adjustable to 30 minutes.
-
Five-minute unloaded running time delay for emergency engine generator
cool down.
-
Four-second time delay to override momentary to ignore momentary voltage
and frequency transients during initial genset loading.
|
VOLTAGE & FREQUENCY SENSING
-
Adjustable three-phase, close differential voltage sensing on normal
source.
-
Normal
source pickup voltage is adjustable to 95% of nominal; drop-out is
adjustable from 70 to 90% of nominal.
-
Frequency
sensing on emergency source. Pickup at 95% and dropout at 85% of
nominal.
STANDARD CONTROL CONTACTS
-
Switch
position indicating contacts (rated 10 amps 250VAC, 32VDC). (1) for
Normal position, (1) for Emergency position.
-
Gold
plated engine start contacts (rated 5 amps 28VDC or 120VAC).
REMOTE CONTROL FEATURES
-
Remote
test switch.
-
Remote
contact for test or for peak shaving applications. Circuit will be
automatically bypassed if emergency source fails.
-
Inhibit
transfer to emergency.
-
Remote
time delay bypass switch.
|
