Emerson ASCO 920 Brochures and Data Sheets

Maximum reliability and excellent value

ASCO 920 Remote Control (RC) Switches

ASCO 920 Remote Control Switch

in Type 1 Enclosure

ASCO 920 Features

Electrical Features

•UL listed. CSA Approved

•Meets UL 67 requirements
with short-circuit rating
(Withstand Current Rating)
of 22,000 Amps rms sym­metrical at 480 volts for use
with molded case circuit
breakers; 100,000 Amps
rms symmetrical at 600
volts for use with current­limiting fuses.

•Interrupts 300% of rated
current at 480 volts, 0.4 to

0.5 power factor

•Can be used with metal ha­lide, mercury vapor, quartz
halogen, tungsten and
uorescent lighting.

•No derating when used on
high inrush loads such as
cold tungsten lamps.

•Wide arc gaps and arc split­ters to quickly extinguish
arcs. Isolated arcing cham­bers are widely spaced and
symmetrically located.

The ASCO 920 is designed
as a feeder disconnect switch
for load capacities beyond
the ASCO 917. ASCO 920
RC switches are available for
separate mounting in NEMA
type enclosures or direct
mounting within lighting
panelboards for total or split­bus applications.
It is available from 30
through 225 Amperes per
pole with 2 or 3 poles and
service voltages through 600
volts AC. The ASCO 920 is
listed under UL 508 for ballast
lighting, tungsten, general
use and resistive loads. It also

Construction Features

•Long life. Designed for
more demanding lighting
contactor use. Provides
extended life and quieter
operation.

•Suitable for use with energy
management systems.

•Rugged molded base and
cover with superior electri­cal insulation.

•Provisions for manual
operation during inspection
and maintenance.

•Lightweight for easy
installation.

•Plug-in auxiliary control
relays available.

meets the withstand current
requirements of UL 67 for
panelboard applications.
The ASCO 920 is easy to
install and features all posi­tion mounting, no derating
for high inrush loads and
a reliable single-solenoid
operator. ASCO 920 RC
switches can be used with
energy management systems
which automatically control
lighting and power circuits
through control devices
such as photoelectric cells,
microprocessors, timers and
occupancy sensors.

•Control line terminal
clamps simplify installation:
Insert wire and tighten.
Wire range #14 AWG to
#10 AWG.

•Contacts are power-driven
in both directions for
complete dependability.

•No extra wires or contacts
needed to install signal
lamps at control stations.

•Can be mounted in any
position.

•Available from stock from
30-225 Amps.