WVM Series - Voltage Monitor

Series: WVM
Replaced By601, 460, 201, DLM
Questions? Contact Littelfuse Support
External overview image
Roll Over to Zoom
Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The WVM Series provides protection against premature equipment (motor) failure caused by voltage faults on the 3-phase line. The WVM’s microcontroller design provides reliable protection even if regenerated voltages are present. It combines dependable fault sensing with a 10 fault memory and a 6 LED status display. Part instrument, part control, the WVM protects your equipment when you’re not there and displays what happened when you return. The WVM is fully adjustable and includes time delays to prevent nuisance tripping and improve system operation. Time delays include a 0.25 to 30s adjustable trip delay, an adjustable 0.25 to 64m (in 3 ranges) restart delay, plus a unique 3 to 15s true random start delay. The random start delay prevents voltage sags caused by simultaneous restarting of numerous motor loads after a power outage.


See datasheet for operation details.

Product Literature

For Technical Questions

Call +1 800-832-3873 or email us at relays@littelfuse.com 

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)		Output
Form		Termination TypeMounting MethodDimensionsWeight (lbs/g)IndicationInput TypeLifeMemory CapacityMemory TypeOutput Load Rating (VA)Output TypeOvervoltage Reset Voltage (%)Overvoltage Trip Voltage (%)Compare
WVM011AL500 to 600VACIsolated SPDTScrew terminals with captive wire clamps for up to #12 AWG (3.2mm2) wireSuface mount with 2 or 4 #8 (M4 x 0.7) screws6.90 x 4.40 x 2.40 in. (175.3 x 111.8 x 61.0mm)≅25oz (709g)6 LEDs provide existing status and memory readout3-phase delta or wye with no connection to neutralMechanical - 1 x 107Stores last 10 faultsNonvolatile RAM10A resistive @ 250VAC; 6A inductive (0.4pF) @ 250VACElectromechanical relay-2% of the trip voltage109 - 113% of the adjusted line voltage
WVM611AH200 to 240VACIsolated SPDTScrew terminals with captive wire clamps for up to #12 AWG (3.2mm2) wireSuface mount with 2 or 4 #8 (M4 x 0.7) screws6.90 x 4.40 x 2.40 in. (175.3 x 111.8 x 61.0mm)≅25oz (709g)6 LEDs provide existing status and memory readout3-phase delta or wye with no connection to neutralMechanical - 1 x 107Stores last 10 faultsNonvolatile RAM10A resistive @ 250VAC; 6A inductive (0.4pF) @ 250VACElectromechanical relay-2% of the trip voltage109 - 113% of the adjusted line voltage
WVM611AL200 to 240VACIsolated SPDTScrew terminals with captive wire clamps for up to #12 AWG (3.2mm2) wireSuface mount with 2 or 4 #8 (M4 x 0.7) screws6.90 x 4.40 x 2.40 in. (175.3 x 111.8 x 61.0mm)≅25oz (709g)6 LEDs provide existing status and memory readout3-phase delta or wye with no connection to neutralMechanical - 1 x 107Stores last 10 faultsNonvolatile RAM10A resistive @ 250VAC; 6A inductive (0.4pF) @ 250VACElectromechanical relay-2% of the trip voltage109 - 113% of the adjusted line voltage
WVM611RL200 to 240VACIsolated SPDTScrew terminals with captive wire clamps for up to #12 AWG (3.2mm2) wireSuface mount with 2 or 4 #8 (M4 x 0.7) screws6.90 x 4.40 x 2.40 in. (175.3 x 111.8 x 61.0mm)≅25oz (709g)6 LEDs provide existing status and memory readout3-phase delta or wye with no connection to neutralMechanical - 1 x 107Stores last 10 faultsNonvolatile RAM10A resistive @ 250VAC; 6A inductive (0.4pF) @ 250VACElectromechanical relay-2% of the trip voltage109 - 113% of the adjusted line voltage
WVM811AH355 to 425VACIsolated SPDTScrew terminals with captive wire clamps for up to #12 AWG (3.2mm2) wireSuface mount with 2 or 4 #8 (M4 x 0.7) screws6.90 x 4.40 x 2.40 in. (175.3 x 111.8 x 61.0mm)≅25oz (709g)6 LEDs provide existing status and memory readout3-phase delta or wye with no connection to neutralMechanical - 1 x 107Stores last 10 faultsNonvolatile RAM10A resistive @ 250VAC; 6A inductive (0.4pF) @ 250VACElectromechanical relay-2% of the trip voltage109 - 113% of the adjusted line voltage
WVM811RL355 to 425VACIsolated SPDTScrew terminals with captive wire clamps for up to #12 AWG (3.2mm2) wireSuface mount with 2 or 4 #8 (M4 x 0.7) screws6.90 x 4.40 x 2.40 in. (175.3 x 111.8 x 61.0mm)≅25oz (709g)6 LEDs provide existing status and memory readout3-phase delta or wye with no connection to neutralMechanical - 1 x 107Stores last 10 faultsNonvolatile RAM10A resistive @ 250VAC; 6A inductive (0.4pF) @ 250VACElectromechanical relay-2% of the trip voltage109 - 113% of the adjusted line voltage
WVM911AH400 to 480VACIsolated SPDTScrew terminals with captive wire clamps for up to #12 AWG (3.2mm2) wireSuface mount with 2 or 4 #8 (M4 x 0.7) screws6.90 x 4.40 x 2.40 in. (175.3 x 111.8 x 61.0mm)≅25oz (709g)6 LEDs provide existing status and memory readout3-phase delta or wye with no connection to neutralMechanical - 1 x 107Stores last 10 faultsNonvolatile RAM10A resistive @ 250VAC; 6A inductive (0.4pF) @ 250VACElectromechanical relay-2% of the trip voltage109 - 113% of the adjusted line voltage
WVM911AL400 to 480VACIsolated SPDTScrew terminals with captive wire clamps for up to #12 AWG (3.2mm2) wireSuface mount with 2 or 4 #8 (M4 x 0.7) screws6.90 x 4.40 x 2.40 in. (175.3 x 111.8 x 61.0mm)≅25oz (709g)6 LEDs provide existing status and memory readout3-phase delta or wye with no connection to neutralMechanical - 1 x 107Stores last 10 faultsNonvolatile RAM10A resistive @ 250VAC; 6A inductive (0.4pF) @ 250VACElectromechanical relay-2% of the trip voltage109 - 113% of the adjusted line voltage
WVM911AL-60400 to 480VACIsolated SPDTScrew terminals with captive wire clamps for up to #12 AWG (3.2mm2) wireSuface mount with 2 or 4 #8 (M4 x 0.7) screws6.90 x 4.40 x 2.40 in. (175.3 x 111.8 x 61.0mm)≅25oz (709g)6 LEDs provide existing status and memory readout3-phase delta or wye with no connection to neutralMechanical - 1 x 107Stores last 10 faultsNonvolatile RAM10A resistive @ 250VAC; 6A inductive (0.4pF) @ 250VACElectromechanical relay-2% of the trip voltage109 - 113% of the adjusted line voltage
WVM911AN400 to 480VACIsolated SPDTScrew terminals with captive wire clamps for up to #12 AWG (3.2mm2) wireSuface mount with 2 or 4 #8 (M4 x 0.7) screws6.90 x 4.40 x 2.40 in. (175.3 x 111.8 x 61.0mm)≅25oz (709g)6 LEDs provide existing status and memory readout3-phase delta or wye with no connection to neutralMechanical - 1 x 107Stores last 10 faultsNonvolatile RAM10A resistive @ 250VAC; 6A inductive (0.4pF) @ 250VACElectromechanical relay-2% of the trip voltage109 - 113% of the adjusted line voltage
WVM911RH400 to 480VACIsolated SPDTScrew terminals with captive wire clamps for up to #12 AWG (3.2mm2) wireSuface mount with 2 or 4 #8 (M4 x 0.7) screws6.90 x 4.40 x 2.40 in. (175.3 x 111.8 x 61.0mm)≅25oz (709g)6 LEDs provide existing status and memory readout3-phase delta or wye with no connection to neutralMechanical - 1 x 107Stores last 10 faultsNonvolatile RAM10A resistive @ 250VAC; 6A inductive (0.4pF) @ 250VACElectromechanical relay-2% of the trip voltage109 - 113% of the adjusted line voltage
WVM911RL400 to 480VACIsolated SPDTScrew terminals with captive wire clamps for up to #12 AWG (3.2mm2) wireSuface mount with 2 or 4 #8 (M4 x 0.7) screws6.90 x 4.40 x 2.40 in. (175.3 x 111.8 x 61.0mm)≅25oz (709g)6 LEDs provide existing status and memory readout3-phase delta or wye with no connection to neutralMechanical - 1 x 107Stores last 10 faultsNonvolatile RAM10A resistive @ 250VAC; 6A inductive (0.4pF) @ 250VACElectromechanical relay-2% of the trip voltage109 - 113% of the adjusted line voltage
WVM911RN-60400 to 480VACIsolated SPDTScrew terminals with captive wire clamps for up to #12 AWG (3.2mm2) wireSuface mount with 2 or 4 #8 (M4 x 0.7) screws6.90 x 4.40 x 2.40 in. (175.3 x 111.8 x 61.0mm)≅25oz (709g)6 LEDs provide existing status and memory readout3-phase delta or wye with no connection to neutralMechanical - 1 x 107Stores last 10 faultsNonvolatile RAM10A resistive @ 250VAC; 6A inductive (0.4pF) @ 250VACElectromechanical relay-2% of the trip voltage109 - 113% of the adjusted line voltage
To request product environmental information, please complete the Product Environmental Information Request Form.