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Littelfuse 50R-100 Single-Phase Voltage Monitor 95-120V (Replaces 50R-115)

Price: $142.48
Quantity:
+ -
Usually ships within 24 hours.
In Stock Quantity: 2
SKU: MSR50R100


Shipping Weight:
2.0 LBS
Shipping Dimensions
Length: 6 In
Width: 6 In
Height: 10 In
WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Littelfuse 50R-100 Voltage Monitor Description (Replaces 50R-115)

Model 50R Single Phase Voltage Monitor has a voltage sensing circuit which constantly monitors the single phase power for a low voltage condition. Single phase motors on fans, compressors, air conditioners, heat pumps, sump pumps, and small conveyor motors are all applicable to the Model 50R. When a harmful condition is detected the MotorSaver's output relay is deactivated after the specified trip delay. The output relay reactivates after power line conditions return to an acceptable level for the specified amount of time (Restart Delay). The trip delay prevents nuisance tripping due to rapidly fluctuating power line conditions.

Littelfuse 50R-100 Voltage Monitor Typical Applications

  • Fans
  • Compressors
  • Air Conditioners
  • Heat Pumps
  • Well Pumps
  • Sump Pumps
  • Small Conveyor Motors

Littelfuse 50R-100 Voltage Monitor Features

  • Protects Single-Phase Motors From:
    • Low Voltage
    • Optional High Voltage
  • Bicolor LED Indicator Light is Green in Normal Conditions and Red During Trip Conditions
  • Compact Design Saves on Precious Panel Space
  • 10A @ 240 VAC General Purpose Relay can Switch Most Loads
  • Microcontroller Based - Provides Better Accuracy and Higher Reliability than Analog Designs
  • Transient Protected to Meet IEC 1000-4-5:1995 Standards and Stand up Under Tough Conditions
  • Surface Mount with Optional DIN Rail Mountability
  • Optional Manual 2-300 sec. Variable Restart Delay
  • Optional 2-30 sec. Trip Delay
  • UL and cUL Listed
  • 5-Year Warranty
  • Made in USA

Littelfuse 50R-100 Voltage Monitor Specifications

Single-Phase Line Voltage . . . . . . . . . . . . 95-120 VAC

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

Low Voltage (% of set point)

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

Delay Time (Nominal)

  • Trip . . . . . . . . . . . . . . . . . . . . . . . . 4 seconds
  • Restart (low voltage) . . . . . . . . . . . . . . . . . 2 seconds
  • Restart (complete power loss) . . . . . . . 2 seconds

Output Contact Rating

  • (SPDT-1Form C) 50R-100, 50R200 . . . . . . . . . . . . . . 480VA @ 240VAC Pilot Duty
  • . . . . . . . . . . . . . . . . . . . . . . . . . . . . or 10A @ 240VAC General Purpose
  • 50R400. . . . . . . . . . . . . .470VA @ 600VAC Pilot Duty

Temperature Range

  • Operating . . . . . . . . . . . . . . . . . . . . . -20° to 70°C (-4° to 158°F)
  • Storage . . . . . . . . . . . . . . . . . . . . . -40° to 80°C (-40° to 176°F)

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

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

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

Wire Gauge . . . . . . . . . . . . . 12-18AWG

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

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

Transient Protection (Internal) . . . . . . . . IEC 61000-4-5; 1995 ±6kV

Safety Marks

  • UL . . . . . . UL508 (File #E68520)
  • CE . . . . . . . . . . . IEC 60947-6-2

Weight . . . . . . . . . . . . . . . . . . . . . . . . 15.68 oz.

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

Special Options

  • Option 2: Variable Restart Delay . . . . . . . . . . . . . Manual, 2-300 seconds
  • Option 3: Variable Trip Delay . . . . . . . . . . . . . . . . 2-30 seconds
  • Option 9: High Voltage Detection Operating Points
    • Trip (% of Setpoint). . . . . . . . . . . . . 110%
    • Reset (% of Setpoint). . . . . . . . . . . . . 107%

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


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

SymCom Warranty

SymCom Limited Warranty

Terms and Conditions of Sale

Effective January 1, 2009 General Remarks: These Terms and Conditions of Sale apply to all sales and deliveries effected by SymCom. Any terms or conditions on the part of the purchaser that are contrary to these shall not be binding on SymCom, even if they form the basis of the order. Prices: Subject to change without notice. Minimum order is one hundred-fifty dollars ($150.00), excluding shipping charges. Terms: Net 30 days from ship date with approved credit. New customers requesting trade credit must submit a credit application prior, and receive approval prior to an order being placed in production. Handling Fee: A $5.00 handling fee will be assessed on each order. Delivery: Buyer's delivery schedule will be met to the best of SymCom's ability. SymCom reserves the right to make partial shipments on any order. SymCom is not responsible for shipping errors on behalf of the carrier. Freight: All sales are F.O.B., SymCom, Inc., Rapid City, SD. Shipments will be made by the transportation method selected by the Buyer whenever practical. Warranty: SymCom warrants its standard products against defects in material or workmanship for a period of five (5) years from the date of manufacture. All third-party products are warranted by their manufacturer and are handled as a pass-through warranty by SymCom. All custom and private labeled products are warranted for eighteen (18) months unless otherwise stated in writing. The liability of SymCom is limited, at its option, to replace, repair, or credit at the purchase price, for any devices which are returned during the warranty period and which prove to be defective. This warranty constitutes SymCom's sole liability here under and is in lieu of any other warranty expressed, implied or statutory, written or oral, including without limitation, any implied warranties of merchantability or fitness for a particular purpose and supersedes any representations made by any person which are inconsistent with or expand the terms set forth in this document. No person is authorized to modify this warranty in any way whatsoever. Limits of Liability: IN NO EVENT, REGARDLESS OF CAUSE, SHALL SYMCOM BE LIABLE FOR (1) PENALTIES OR PENALTY CAUSES OF ANY DESCRIPTION OR (2) FOR CERTIFICATION NOT OTHERWISE SPECIFICALLY PROVIDED HEREIN AND/OR INDEMNIFICATION OF BUYER TO OTHERS FOR COSTS, DAMAGES OR EXPENSES, EACH ARISING OUT OF OR RELATED TO THE PRODUCT OR SERVICES OF ANY ORDER OR (3) FOR ANY DAMAGES, WHETHER GENERAL, SPECIAL, OR FOR NEGLIGENCE, AND EXPRESSLY EXCLUDES DAMAGES RESULTING FROM LOSS OF PROFITS, USE OF PRODUCTS, ANY INCIDENTAL, OR INDIRECT CONSEQUENTIAL DAMAGES EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SYMCOM'S OBLIGATION TO REPAIR, REPLACE OR CREDIT THE PURCHASE PRICE SHALL BE THE LIMIT OF ITS LIABILITY UNDER THIS WARRANTY. Returns: All returns must be authorized by SymCom and must have a Return Material Authorization (RMA) number. Issuance of a RMA number does not acknowledge goods as defective or under warranty by the seller. Unauthorized returns will be refused. Authorized returns must be shipped freight prepaid and are subject to inspection and/or testing prior to disposition. Product built to Buyer's specifications cannot be returned for credit or exchanged under any circumstances. For SymCom’s complete RMA terms, please visit our website. Cancellation of Custom or Non-Preferred Products: Buyer may cancel an order upon written notice to SymCom's customer service department and upon payment of cancellation charges, which shall include all costs, both direct and indirect, incurred and/or committed. SymCom agrees to divert completed work and work in progress from a cancelled order to other orders whenever possible. Cancellation of Preferred Products: Full refund if returned within 30 days of purchase. Unit must be in original packaging and in new condition. An RMA must be issued for any return.

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