Emerson LM Series Manuel D’Utilisation

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.

The unit is housed in a heavy 

duty, steel, NEMA 12 dust-tight, 

drip-tight enclosure. 

System monitoring will indicate an

undervoltage at 70% of nominal.

System monitoring will indicate a loss

of any phase or loss of power.

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.

All components are individually fused

and unit is UL rated for 200k AIC for

safe operation.

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.

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. 

A full five-year parts warranty.

Two sets of electronically isolated

form C dry contacts are provided,

(two normally open, two normally

closed) for remote monitoring.

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.

A 200k AIC integral disconnect switch

located within the system enclosure

with an external manual operator.

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.

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.