Better
455 Voltage/Phase Monitor
Informer-MS Handheld Diagnostic Tool
Provides all the same voltage/phase
protection as the 460/201A-AU, but with
three added advantages:
n Second set of voltage inputs for monitoring
voltage on the load-side of the motor
contactor to detect contact failure.
n Keeps history of the past 20 fault causes
including voltages and unbalance at the
time of trip
n With optional Informer-MS, wirelessly
download and view fault history, read real-
time voltages per phase, voltage unbalance
and more–ideal for troubleshooting
Best
777-P2 MotorSaver
®
(for industrial motors)
777-KW/HP-P2 PumpSaver
®
(for pumps)
Enhanced Overload Relay/Power Monitor,
provides the same 3-phase voltage/phase
protection as the 455, plus:
n Motor/pump protection from current
overloads and underloads (broken shaft
couplers or belts for motors and dry
running for pumps)
n Current unbalance
n Ground-fault protection
n On-board display for easy programming,
real-time voltage/current readings and
fault codes
n Remote communications capability for
connecting to a remote monitor SCADA,
PLC, or PC communications network via a
communications module
Good, Better, & Best
3 EASY OPTIONS FOR ENHANCED MOTOR PROTECTION
460
201 A-AU
455
Informer-MS
777 -P2
www.Littelfuse.com/MotorProtection
© 2016 Littelfuse Protection Relays & Controls
Good
460 (DIN-rail or surface mount)
201 A-AU (8-pin socket mount)
Voltage/Phase Monitors
Cost effective option; protects 3-phase
motors from:
n Over/under voltage
n Phase loss
n Reverse phase
n Unbalanced voltage
n Rapid cycling
Without protection, each of these faulty
conditions can cause motor windings to
overheat and burn motor insulation–causing
premature motor failure.
Assembled in USA
Competitive Cross Reference Sheet
LITTELFUSE
MODEL
FUNCTIONALITY
ATC DIVERSIFIED
MODELS
TIME MARK
MODELS
LITTELFUSE ADVANTAGES/NOTES
201A-AU
8-pin socket mount, voltage/phase
monitor, universal voltage (190-480V),
adjustable voltage unbalance % trip,
trip & restart delays, diagnostic LED
SLAXXXASA,
SUAXXXASA,
SLDXXXASA,
SLU100ASA,
PRA100AFA
257B, A257B,
258B, A258B,
257BM, A257BM,
258BM, A258BM
n
universal voltage
n
adjustable unbalance % trip setting
n
trip delay or restart delay
n
diagnostic LED
n
high voltage protection
460
Same as above, only with DIN-rail
and surface mount
SLBXXXALEA,
SLBXXXALER,
SLU100ASD,
SLAXXXALE,
SLCXXXALE,
SUXXXALE,
SLMXXXASE
263 series,
265 series,
200 series,
2642 series,
2652 series,
2644 series,
158 series
Same advantages as above.
(For Diversified SLA, SLC, SU & SLM, if 2 Form C
contacts are required use our Model 250A or 355)
455
Same features as above including
contactor failure monitoring, and
history of past 20 fault causes
None None No crosses for the unit
777-P2
Current, voltage & phase protection
for motors
None None No crosses for the unit
777-KW/HP-P2
Current, voltage & phase protection
for pumps
None None No crosses for the unit
For More Advanced Motor Protection Choose... For Motor and MCC Circuit Protection Choose...
Scan with your mobile
device to download the
Motor Protection Guide
MPU-32 Motor Protection Unit
Used to provide current and temperature-
based protection, metering, and data
logging for three-phase low-voltage
medium-horsepower induction motors.
MPS Motor Protection System
Monitors voltage, current, and
temperature to provide a comprehensive
package of 22 protective functions.
Good J
CCMR, FLSR, and JTD series fuses
provide excellent general protection for
a wide range of circuits, especially those
containing motors or motor controllers.
Better JJ
FLSR ID, JTD ID, and LLSRK ID fuses
provide outstanding electrical protection
along with the added benefit of open
fuse indication.
Best JJJ
CCMR, FLSR ID, LLSRK ID, and JTD ID
fuses coupled with Littelfuse’s space
saving indicating fuse blocks provide the
ultimate combination of protection and
ease of open fuse identification.
Form: RC224
Rev: 1-A-091316
Learn more
Littelfuse.com/MotorProtection
www.Littelfuse.com/MotorProtection
© 2016 Littelfuse Protection Relays & Controls
Littelfuse World Headquarters
8755 West Higgins Road, Suite 500
Chicago, IL 60631
USA
Tel: +1-800-832-3873
Fax: +1-847-787-5190
E-mail: techline@littelfuse.com
Littelfuse SymCom
222 Disk Drive
Rapid City, SD 57701
USA
Tel: + 1-800-843-8848
Fax: + 1-605-348-5685
E-mail: customerservice@symcom.com
Littelfuse Startco
3714 Kinnear Place
Saskatoon, SK S7P 0A6
Canada
Tel: +1-306-373-5505
Fax: +1-306-374-2245
E-mail: relays@littelfuse.com