Littelfuse 460-575-14 Voltage Monitor Product 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 460-575-14 Voltage Monitor Typical Applications

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

Littelfuse 460-575-14 Voltage Monitor 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 Valve One NO and One NC (-14) or Two NO (-15) Output Contacts.

Littelfuse 460-575-14 Voltage Monitor Specifications

3-Phase Line Voltage . . . . . . . . . . . . 475-600 VAC

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

Low Voltage (% of set point)

• Trip . . . . . . . . . . . . . . . . . . . . . . . . . . 90%
• Reset . . . . . . . . . . . . . . . . . . . . . . . . . 93%

High Voltage (% of set point)

• Trip . . . . . . . . . . . . . . . . . . . . . . . . . . 110%
• Reset . . . . . . . . . . . . . . . . . . . . . . . . . 107%

Voltage Unbalance (NEMA)

Trip Delay Time

Restart Delay Time

Output Contact Rating

Temperature Range

Power Consumption . . . . . . . . . . . . . 5 Watts (Max.)

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

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

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

Wire Gauge . . . . . . . . . . . . . Stranded or solid 12-20 AWG, one per terminal

Radio Frequency

Surge

Safety Marks

Enclosure . . . . . . . . . . . . . . . . . . . . . Polycarbonate

Weight . . . . . . . . . . . . . . . . . . . . . . . . 11.2 oz.

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 460-575-14 Voltage Monitor Resources

Littelfuse 460-15 Product Specifications

Littelfuse 460-15 Installation Bulletin

Littelfuse 460-15 Engineering Specifications