777-HVR-KW/HP-P2 - 777-KW/HP-P2 Series

Littelfuse Power Monitors
The 777-KW/HP-P2 Series has the overload, voltage, phase loss and reversal, voltage and current unbalance, current and power monitoring*, and underload trip based on power in one package. The underpower trip feature is desirable anytime the current vs. load characteristic is non-linear or has little change. In general terms, smaller motors and slow-speed motors have little change in current over the normal load range. Larger motors that are running light loads will also show small current changes over the operating load range. For standalone applications, the units incorporate a 3-digit LED display that is used for programming, providing real-time operational information and displaying diagnostic codes to aid in troubleshooting a fault condition.
Property (Mouseover for details) Value
Input Voltage (V) 340 to 480VAC
Maximum Input Power 10W
Input AC Line Frequency (Hz) 50/60Hz
Output Form SPDT - Form C
Output Load Rating (VA) Pilot Duty: 470VA @ 600VAC B600; General Purpose: 10A @ 240VAC
Full Load Amp Range (A) 2 - 20A (looped conductors required); 20 - 90A (direct); 80 - 800A (external CTs required)
Timing Accuracy (%) ±0.5s
Rapid Cycle Timer (s) 0 - 999s
Restart Delay Range All faults except undercurrent: 2 - 500m; Undercurrent: 2 - 500m A (Automatic); # of Restarts: All faults except undercurrent: 0, 1, oc1, 2, oc2, 3, oc3, 4, oc4, A, ocA (Automatic); Undercurrent: 0, 1, 2, 3, 4, A (Automatic)
Repeat Accuracy (%) Voltage: ±0.5% of nominal voltage; Current: ±1% (<100 amps direct); Power: ±2%
Overvoltage Trip Voltage (%) 341 - 528V
Undervoltage Trip Voltage 340 - 523V
Voltage Unbalance Trip Point (%) 2 - 25% or 999 (disabled)
Voltage Accuracy (%) ±1%
Overcurrent Trip Point (20A - 100A) … MULT of 80 - 140% of CT primary
Overcurrent Trip Class 02 - 60, J02 - J60, L00 - L60 or OFF
Undercurrent Trip Delay (s) 5s (default)
Current Unbalance Trip Point (%) 2 - 50% or 999 (disabled)
Current Accuracy (%) ±3% (<100 amps direct)
Ground Fault Current Trip Point (A) (3 - 20A) … MULT or 12 - 40% of CT primary or OFF
Ground Fault Accuracy (%) ±15%
Sensor Hole Size Max conductor size: 0.65 in (with insulation)
Short Circuit (kA) 100kA
Surge Protection IEC: 61000-4-5 Level 3 2kV line-to-line; Level 4 4kV line-to-ground
Protection Class IP20
Pollution Degree 3
CT Ratio 1 - 10, 100, 150, 200, 300, 400, 500, 600, 700, 800
Address COM: C00 - C07; RS485: A01 - A99
Life Electrical: 1 x 105 operations at rated load; Mechanical: 1 x 106
Termination Type Torque: 7in-lbs
Mounting Method Surface mount (4 - #8 screws) on DIN rail mount
Operating Temperature -20° to 70°C (-4° to 158°F)
Storage Temperature (F/C) -40° to 80°C (-40° to 176°F)
Humidity 10-95% non-condensing per IEC 68-2-3
Dimensions 3.05 H x 3.85 W x 5.05 D in. (77.5 x 97.8 x 128.3 mm)
Weight (lbs/g) 1.56 lbs. (25.0 oz. 707.6 g)