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Littelfuse 355-200 Three-Phase Voltage/Phase Monitor

Littelfuse 355-200 Three-Phase Voltage/Phase Monitor

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SKU : MSR355200

In Stock Quantity:0

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Brand : Littelfuse/Symcom
$370.07 USD
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Description

Littelfuse 355-200 Voltage Monitor Product Description

The 355 is a 3-phase voltage monitor with adjustable trip and restart delay, adjustable voltage unbalance and multiple diagnostic lights. It is perfect for heavy-duty applications that need both protection and simple user-friendly diagnostics. Applications include pump panels, commercial HVAC, oil rigs and others.

The 355 uses microcontroller technology to monitor incoming voltage and de-energize its output relay if power problems exist. The 355 can protect motors from damage caused by single-phasing, high and low voltage, phase reversal and voltage unbalance. It has four diagnostic LEDs that clearly show overvoltage, undervoltage, voltage unbalance, reverse-phase and normal conditions.

The 355-200 is equipped with a heavy-duty 10A general purpose SPDT relay. The 355-400 and 355-600 are equipped with a 470VA @ 600VAC pilot duty SPDT relay. A high voltage (600V) DPDT relay output option is available with the 400V model.

Littelfuse 355-200 Voltage Monitor Typical Applications

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

Littelfuse 355-200 Voltage Monitor Features

  • Proprietary Microcontroller Based Circuitry: Constantly Monitors 3 Phase Voltage to Protect Against Harmful Line Conditions, Even Before the Motor is Started
  • Advanced LED Indication: Provides Diagnostics which can be Used for Troubleshooting and to Determine Relay Status
  • Adjustable Trip and Restart Delay Settings: Prevent Nuisance Tripping Due to Rapidly Fluctuating Power Line Conditions and Allows Staggered Start Up of Multiple Monitors, After a Fault to Prevent a Low Voltage Condition
  • Combines Protection and Diagnostics: Perfect for Heavy Duty Applications: Pump Panels, Commercial HVAC and Oil Rigs
  • 600V Rated Relay Contacts Available on Some Models: Eliminates the Need for a Control Transformer to Step Voltage Down to 120-240V for a Control Circuit

Specifications

Littelfuse 355-200 Voltage Monitor Specifications

3-Phase Line Voltage . . . . . . . . . . . . 190 to 240 VAC

Frequency . . . . . . . . . . . . . . . . . . . . . 50*/60Hz

Low Voltage (% of setpoint)

  • Trip . . . . . . . . . . . . . . . . . . . . . . . . . . 90% ±1%
  • Reset . . . . . . . . . . . . . . . . . . . . . . . . . 93% ±1%

High Voltage (% of setpoint)

  • Trip . . . . . . . . . . . . . . . . . . . . . . . . . . 110% ±1%
  • Reset . . . . . . . . . . . . . . . . . . . . . . . . . 107% ±1%

Voltage Unbalance (NEMA)

  • Trip . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8% adjustable
  • Reset . . . . . . . . . . . . . . . . . . . . . . . . . Trip setting minus 1%

Trip Delay Time

  • Low & High Voltage and Unbalance. . . . . . . . . . . . 2-30 seconds adjustable
  • Single-Phasing Faults (>25% UB) . . . . . . . 2 seconds

Restart Delay Time

  • After a Fault . . . . . . . . . . . . . . . . . Manual, 2-300 seconds adj.
  • After a Complete Power Loss. . . . . . . Manual, 2-300 seconds adj.

Output Contact Rating

  • SPDT (355200) . . . . . . . . . . . . . . . . . . . . . . . . 480VA @ 240VAC Pilot Duty
  • . . . . . . . . . . . . . . . . . . . . . . . . . . . . or 10A General Purpose
  • SPDT (355400, 355600) . . . . . . . . . . . . 470VA @ 600VAC Pilot Duty
  • DPDT(-5 Option) . . . . . . . . . . . . . . . . . 470VA @ 600VAC Pilot Duty

Temperature Range

  • Operating . . . . . . . . . . . . . . . . . -40° to 70°C (-40° to 158°F)
  • Storage . . . . . . . -40° to 80°C (-40° to 176°F)

Repeat Accuracy

  • Fixed Conditions . . . . . . . . . . . . . . . . . ±0.1%

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

Terminal Torque . . . . . . 7 in.-lbs.

Wire Size . . . . . . 12-18AWG

Transient Protection (Internal) . . . . . . 2500V for 10 ms

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

Weight . . . . . . . . . . . . . . . . . . . . . . . . 15.4 oz.

Mounting Method . . . . . . . . . . . #8 screws

Special Options

  • Option 5 - DPDT Relay

*Note: 50Hz will increase all delay timers by 20%.


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

Resources

Littelfuse 355-200 Voltage Monitor Resources

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Littelfuse 355-200 Product Specifications

Littelfuse 355-200 Installation Bulletin

Littelfuse 355-200 Engineering Specifications

Warranty
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