Hubbell LX-450 User Manual

Hubbell Industrial Controls, Inc.

May 2009 (Replaces March 2008)

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Transfer Switches

LX-450 Automatic Transfer Switch • LX-440 Non-Automatic Transfer Switch

Catalog • July 2011 • Replaces June 2011

LX-450 and LX-400 Transfer Switches short-circuit

withstand rangs:

100 Amps rated at 42k Amps when used with
circuit breakers

200 Amps rated at 50k Amps when used with
circuit breakers

260-400 Amps rated at 65k Amps when used
with circuit breakers

600-1250 Amps rated at 65k Amps when used
with circuit breakers

SPDT

LX-450 and LX-400 Transfer Switches are double
throw, mechanically Interlocked, electrically
operated. As the Hubbell name implies, these

switches were designed, constructed and tested
for heavy-duty applicaons to assure dependable
operaon.

Transfer Swithces

and

' ' '

both

- 208

LX-450 / LX-440

C - Type 4/12
Standard
D - Type 4X
Stainless
*P - Standard Open
Type Panel

Page 2

LX301 Solid State Control Module

Control Module Features

¾ 2PDT contacts for engine start signals
¾ Module is adjustable from 120-600V, 50-60Hz
¾ Quick disconnect plugs for easy removal

Voltage & Frequency Sensing

¾ Adjustable close differential voltage sensing of all phases of normal source
¾ Pick-up voltage adjustment from 85% to 100%
¾ Drop out voltage adjustment from 75% to 98% of pick-up
¾ Voltage and frequency sensing on all phases of emergency

¾ Voltage adjustable from 85% to 100% of nominal
¾ Frequency adjustable from 90% to 100% of nominal

¾ Voltage and Frequency sensing available for single or three phase operation

Status LED’s:

¾ Normal source voltage available
¾ Emergency source voltage available
¾ Emergency source frequency okay
¾ Transfer to emergency timing
¾ Retransfer to normal timing
¾ Engine cool-down timing

Field adjustable

¾ Time delay to override momentary normal source outages to delay all transfer switch and engine-starting signals—

adjustable zero to six seconds

¾ Transfer to emergency time delay—adjustable from zero to five minutes for controlled timing of load transfer to

emergency

¾ Retransfer to normal time delay—adjustable two to 30 minutes with automatic bypass if emergency source fails
¾ Time delay for running engine unloaded (cool-down)—adjustable from two to thirty minutes

Transfer Swithces

LX-450 / LX-440

Page 3

85k

Transfer Swithces

100 200 200,000 125 42k

200 300 200,000 250 50k

260 350 200,000 400 65k

400 600 200,000 600 65k

600 800 200,000 600 65k

800 1000 200,000 1200 65k

1000 1250 200,000 1600 65k

1250 1600* 100,000 1600 65k

LX-450 / LX-440

NOTE: Dimensions shown are for standard

switches. If ordering with options, consult
factory for actual dimensions.

Hubbell Industrial Controls, Inc.

a subsidiary of Hubbell Incorporated

4301 Cheyenne Drive, Archdale, NC 27263

Phone [phone] | Fax [phone]

www.hubbell-icd.com

[e-mail]