Littelfuse 460-14 Description

The Models 460-14 and 460-15 are designed to protect 3-phase loads from damaging power conditions. Its wide operating range, combined with UL, cUL and CE compliance, enables quick access to domestic and global markets.

A unique microcontroller-based voltage and phase-sensing circuit constantly monitors the 3-phase voltages to detect harmful power line conditions. When a harmful condition is detected, the MotorSaver's output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to an acceptable level for a specified amount of time (restart delay). The trip and restart delays prevent nuisance tripping due to rapidly fluctuating power line conditions.

The Models 460-14 and 460-15 automatically sense whether they are connected to a 190-240V 60Hz system, a 440-480V 60Hz system, or a 380-416V 50Hz system. An adjustment is provided to set the nominal line voltage from 190-240 or 380-480VAC. Motor control is accomplished with one NO contactor and one NC contactor (Model 460-14) or two NO contactors (Model 460-15). Other adjustments include a 1-30 second trip delay, a 1-500 second restart delay, and a 2-8% voltage unbalance trip point adjustment.

Littelfuse 460-14 Voltage Monitor Typical Applications

• Fans
• Compressors
• HVAC
• Heat Pumps
• Well Pumps
• Sump Pumps
• Small Conveyor Motors
• Oil Rigs

Littelfuse 460-14 Voltage Monitor Product Features

• Protects motor from:
• Loss of any phase
• Low Voltage
• High Voltage
• Voltage Unbalance
• Phase Reversal
• Rapid cycling
• Isolated output contacts: 1 NO and 1 NC (460-14) 2 NO (460-15)
• Standard surface mount -OR-
• Opt. DIN rail mount
• Standard 1-500 sec. variable restart delay
• Standard 2-8% adj. voltage unbalance trip point
• Standard 1-30 sec. variable trip delay
• Two 8 amp general purpose Form C relays
• UL and cUL listed
• 5-year warranty
• Made in USA
• Universal voltage range from 109-480VAC 50/60Hz provide the versatility needed to handle global applications.
• Four adjustment pots provide flexibility for a variety of applications.
• Diagnostic LEDs indicate trip status and make troubleshooting a snap.
• Microcontroller-based circuitry provides better accuracy and higher reliability than analog designs.
• Transient protection meets IEEE standards and allows operation under tough conditions.
• Single-phase conditions are detected regardless of regenerated voltages.
• Units have one NO and one NC (-14) or two NO (-15) output contacts.

Littelfuse 460-14 Voltage Monitor Product Specifications

3-Phase Line Voltage . . . . . . . . . . . . 190 to 480 VAC

Frequency . . . . . . . . . . . . . . . . . . . . . 50 or 60 Hz

Low Voltage (% of setpoint)

High Voltage (% of setpoint)

Voltage Unbalance (NEMA)

Trip Delay Time

Restart Delay Time

Output Contact Rating

Temperature Range

Class of Protection . . . . . . . . . . . . . . . . . IP20, NEMA 1 (finger safe)

Power Consumption . . . . . . . . . . . . . 6 Watts (Max.)

Weight . . . . . . . . . . . . . . . . . . . . . . . . 14.4 oz.

Relative Humidity . . . . . . . . . . . . . .10-95%, non-condensing per IEC 68-2-3

Terminal Torque. . . . . . 4.5 in.-lbs

Wire Type. . . . . . Stranded or Solid 12-20 AWG, One Per Terminal

Electricostatic Discharge (ESD). . . . IEC 61000-4-2, Level 3, 6kV contact, 8kV air

RFI, Radiated. . . . . . 150 MHz, 10V/m

Fast Transient Burst . . . . IEC 61000-4-4, Level 3, 3.5kV input power and controls

Surge

UL Recognized. . . . . . UL508 (File #E68520)

CE . . . . . . . . . . . . . . . . . . . . . . . . IEC 60947-6-2

Mounting Method . . . . . . . . . . . 35 mm DIN rail or Surface Mount (#6 or #8 screws)

460-MR (manual reset) . . . . . . . . . . . . . . . . . . External NO pushbutton required.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Littelfuse 460-14 Voltage Monitor Product Resources

Littelfuse 460-14 Product Specifications

Littelfuse 460-14 Installation Bulletin

Littelfuse 460-14 Engineering Specifications