Emerson Liebert LM Series - Manual (Page 3)

Standard Features
Unit Status Indicators
The unit has an integral status circuit
that monitors the operational status of
all modes of protection, including Line
to Neutral, Line to Ground, and
Neutral to Ground. In the unlikely
event that protection is reduced,
the green LED will go out and the red
LED will be lit. LED indication shall
be provided internal and external to
the product.
Enclosure
The unit is housed in a heavy
duty, steel, NEMA 12 dust-tight,
drip-tight enclosure.
Undervoltage Detection
System monitoring will indicate an
undervoltage at 70% of nominal.
Phase and Power Loss Monitoring
System monitoring will indicate a loss
of any phase or loss of power.
Noise Attentuation
The filter provides insertion loss up to
60 dB from 100 kHz to 100 MHz per 50
Ohm Insertion Loss Methodology from
MIL Std. 220A.
Overcurrent Protection
All components are individually fused
and unit is UL rated for 200k AIC for
safe operation.
3
Audible Alarm
The system is equipped with an
audible alarm activated when
summary alarm contacts are
activated. An ON/OFF button is
provided to silence the alarm, and
an alarm push-to-test button to
test the alarm function. A visible
LED confirms whether alarm is on
or disabled. Both buttons and the
audible alarm are located on the
panel’s front cover.
Agency Listing
The specified unit is UL 1449 (Second
Edition) Listed, UL 1283 Listed, and
CUL Listed. Control Concepts/Liebert
is also company certified ISO 9001 for
manufacturing, design, and service.
Warranty
A full five-year parts warranty.
Form C Dry Contacts
Two sets of electronically isolated
form C dry contacts are provided,
(two normally open, two normally
closed) for remote monitoring.
Life Cycle Testing
The system is life cycle tested to
survive multiple 10kA, 20KV, IEEE
C62.41 Category C3 transients with
less than 5% degradation of clamping
voltage. The minimum numbers of
surges the unit shall be able to protect
against are 8,000 per phase.
Integral Fused Disconnect
A 200k AIC integral disconnect switch
located within the system enclosure
with an external manual operator.
Transient Counter
The system can be equipped with
a transient counter which totals
transient surges that deviate from
the sine wave envelop by more than
125 volts. The counter is located on
the unit's front cover and features
an 8 digit LCD, lithium batteries (with
10-year life), and reset switches.
Remote Monitor Panel
A self contained, UL Listed monitoring
panel. Input power to the monitoring
panel is equipped with a 6-foot power
cord with a 3 NEMA 5-15 plug.
The monitor has an audible alarm, red
and green LEDs silence switch, and a
test switch.
Optional Features