Square device with a blue faceplate, small screen and green screw terminals along the bottom edge.

455575 | Littelfuse | Power Monitoring & Protection

3-Phase Line-Load Voltage Monitor/475-600V/Adjustable VUB,TD,RD

Brand:Littelfuse

MPN:455575

SKU:455-575

List Price:

$479.00

Today's Price:

$249.08

product datasheet

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product series specifications

Supply Watts: 6W maximum

Frequency: 50*/60 Hz * 50 Hz will increase all delay times by 20%.

Contact Rating:

SPDT 480 VA @ 240 VAC pilot duty

10A @ 240 VAC general purpose

SPDT high voltage relay (-480R) 470 VA @ 600 VAC pilot duty

Transient Protection: IEC 1000-4-5; 1995 ± 6K1

Line Voltage Monitored:

455 190 - 480 VAC

455 - 575 475 - 600 VAC

455 - 480R 380 - 480 VAC Low Voltage Trip 90% of setpoint (±1%)

Low Voltage Reset: 93% of setpoint (±1%)

Reset Delay Time after Fault: Manual or 2-300 seconds

Reset Delay Time after Power Loss: Manual or 2-300 seconds

Trip Delay Time High Voltage: 2-30 seconds, adjustable

Trip Delay Time Low Voltage: 2-30 seconds, adjustable

Trip Delay Time Phase Fault: 0.5 seconds

Trip Delay Time Unbalance: 2-30 seconds, adjustable

Voltage Unbalance Reset: Trip setting minus 1%

Voltage Unbalance Trip: 2% to 8%, adjustable

Dimensions: 2.9"H x 5.25"W x 2.9"D (7.4 x 13.3 x 7.4 cm)

Weight: 0.88 lb (0.396 kg)

Approvals: UL and cUL listed, #E68520, CS1, C1

Warranty: 5 years

product series features

The 455 series universal range from 190-480VAC 50/60 Hz provides the versatility needed to handle global applications.
Four adjustment pots provide versatility for a variety of applications.
Load and line-side monitoring provides contactor protection.
Diagnostic LEDs indicate trip status and provide simple troubleshooting.
Microcontroller-based circuitry for better accuracy and higher reliability.
Single-phase conditions are detected regardless of regenerated voltages.
Transient protection meets IEEE and IEC standards and permits operation under tough conditions.

more information & related documents

Series Description

The Model 455 three-phase voltage monitor combines load and line-side monitoring to alert the user of contact failure or impending contact failure. The line-side monitoring will protect the motor from damaging line-side conditions prior to the motor starting. With the Model 455, your motor is fully protected at all times. The motor will not start if a power problem is present. The monitor is equipped with an infrared LED to communicate with the handheld diagnostic tool, the Informer-MS, to display MotorSaver® data to assist in monitoring and troubleshooting the system. Motor run hours, displayed by the Informer-MS can now be reset on the Model 455.

Kele Description

THREE PHASE LINE-LOAD VOLTAGE MONITOR 475-600VAC

Manufacturer

Littelfuse