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Series: 777-KW/HP-P2

Littelfuse 777-KW/HP-P2 Current & Voltage Monitor Provides Exceptional Protection

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The 777-KW/HP-P2 is a 3-phase current and voltage monitor that provides unsurpassed protection by combining overload, voltage, phase loss and reversal, voltage and current unbalance, power monitoring*, and underload trip based on power into one efficient unit. 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. The low and high power protection feature increases reliability for non-linear motors where the load characteristic has little change.

For standalone applications, these 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. These units also feature a communications network port that can be used with communication modules, listed in the 777 accessories section, to form a Modbus, DeviceNet**, Profibus, or Ethernet network. Up to 99 units can be remotely monitored and controlled from a PC, PLC, or SCADA system, and data logging through a PC with the optional Solutions software.

*Low current trip and high power trip are network programmable only. **DeviceNet is a trademark of its respective owner.

Built-in display
Programmable voltage and current settings
3 selectable restart options
3 programmable restart delay timers
Remote display compatibility
Flexible reset
Network communications capability

Visual indication for programming, viewing real-time voltage, current, kilowatts, horsepower, and last fault code
Allows usage on wide range of systems
Choose from automatic, semi-automatic, or manual to best meet individual application needs
Program separate restart delay time for rapid cycle protection, motor cool down, and dry-well recovery
Aids compliance with arc flash safety regulations and increases safety by displaying real-time data remotely, which eliminates need to open a cabinet
Reset can be done through a push button on the relay or remotely with optional 777-MRSW or OL-Reset remote reset kit
Reset can be done through pushbutton on relay or remotely with optional 777-MRSW or OL-RESET remote reset kit
Compatible with Modbus, DeviceNet**, Profibus, or Ethernet using optional communications module

777-KW/HP-P2 Parts

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	Part Number	Actions	Input Voltage (V)	Output Form	Termination Type	Mount Method	Full Load Amp Range (A)	Dimensions	Weight (kg)	Overcurrent Trip Class	Overcurrent Trip Point	Address	Current Accuracy (%)	Current Unbalance Trip Point (%)	Ground Fault Accuracy (%)	Ground Fault Current Trip Point (A)	Humidity	Input AC Line Frequency (Hz)	Maximum Input Power (W)	Number of Conductors or CT Ratio	Output Load Rating (VA)	Overvoltage Trip Voltage (%)	Pollution Degree	Power Range Setting	Protection Class	Rapid Cycle Timer (s)	Repeat Accuracy (%)	Restart Delay Range	Sensor Hole Size	Short Circuit (kA)	Storage temperature (°C)	Surge Protection	Timing Accuracy (%)	Undercurrent Trip Delay (s)	Undervoltage Trip Voltage (%)	Voltage Accuracy (%)	Voltage Unbalance Trip Point (%)

Part Number	Actions	Input Voltage (V)	Output Form	Termination Type	Full Load Amp Range (A)	Dimensions	Weight (kg)	Overcurrent Trip Class	Overcurrent Trip Point	Address	Current Accuracy (%)	Current Unbalance Trip Point (%)	Ground Fault Accuracy (%)	Ground Fault Current Trip Point (A)	Humidity	Input AC Line Frequency (Hz)	Maximum Input Power (W)	Number of Conductors or CT Ratio	Output Load Rating (VA)	Overvoltage Trip Voltage (%)	Pollution Degree	Power Range Setting	Protection Class	Rapid Cycle Timer (s)	Repeat Accuracy (%)	Restart Delay Range	Sensor Hole Size	Short Circuit (kA)	Surge Protection	Timing Accuracy (%)	Undercurrent Trip Delay (s)	Undervoltage Trip Voltage (%)	Voltage Accuracy (%)	Voltage Unbalance Trip Point (%)
Series: 777-KW/HP-P2 - Littelfuse 777-KW/HP-P2 Current & Voltage Monitor Provides Exceptional Protection Series: 777-KW/HP-P2 Littelfuse 777-KW/HP-P2 Current & Voltage Monitor Provides Exceptional Protection	Datasheet Request Sample View More	500 - 600 Vac	SPDT - Form C	Torque: 7 in-lbs	2 - 20 (looped conductors required); 20 - 90 (direct); 90 - 800 (external CTs required)	3.05 H x 3.85 W x 5.05 D in. (77.5 x 97.8 x 128.3 mm)	0 Kg (kilogram)	02 - 60; J02 - J60; L00 - L60; or OFF	(20 - 100 A) … MULT of 80 - 140% of CT primary	COM: C00 - C07; RS-485: A01 - A99	±3% (<100 A direct)	2 - 50% or 999 (disabled)	±15%	(3 - 20) … MULT or 12 - 40% of primary CT or OFF	10 - 95% non-condensing per IEC 68-2-3	50 / 60	10	1 - 10; 100; 150; 200; 300; 400; 500; 600; 700; 800	Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac	451 - 660 V	3	Power Scale: 1 = 0.01 - 0.99 kW; 2 = 1.00 - 9.95 kW; 3 = 10.0 - 99.5 kW; 4 = 100 - 650 kW; 5 = 0.01 - 1.32 hp; 6 = 1.34 - 13.3 hp; 7 = 13.4 - 133 hp; 8 = 134 - 871 hp; Low Power: 0.01 - 650 kW or 0.01 - 871 hp or 0 (off); LP setting is dependent on PWS setting; PWS must be set prior to LP setting	IP20 (finger safe)	0 - 999 s	Voltage: ±0.5% of nominal voltage; Current: ±1% (<100 A direct); Power: ±2%	All faults except undercurrent: 0 - 500 s; Undercurrent: 0 - 500 s A (Automatic); # of Restarts: All faults except undercurrent: 0; 1; oc1; 2; oc2; 3; oc3; oc4; A; ocA (Automatic); Undercurrent: 0; 1; 2; 3; 4; A (Automatic)	Max conductor size: 0.65 in (with insulation)	100	IEC: 61000-4-5 Level 3 2 kV line-to-line; Level 4 4 kV line-to-ground	±0.5 s	5 s (default)	450 - 649 V	±1%	2 - 25% or 999 (disabled)
Series: 777-KW/HP-P2 - Littelfuse 777-KW/HP-P2 Current & Voltage Monitor Provides Exceptional Protection Series: 777-KW/HP-P2 Littelfuse 777-KW/HP-P2 Current & Voltage Monitor Provides Exceptional Protection	Request Sample View More	340 - 480 Vac	SPDT - Form C	Torque: 7 in-lbs	2 - 20 (looped conductors required); 20 - 90 (direct); 90 - 800 (external CTs required)	3.05 H x 3.85 W x 5.05 D in. (77.5 x 97.8 x 128.3 mm)	0 Kg (kilogram)	02 - 60; J02 - J60; L00 - L60; or OFF	(20 - 100 A) … MULT of 80 - 140% of CT primary	COM: C00 - C07; RS485: A01 - A99	±3% (<100 A direct)	2 - 50% or 999 (disabled)	±15%	(3 - 20) … MULT or 12 - 40% of CT primary or OFF	10 - 95% non-condensing per IEC 68-2-3	50 / 60	10	1 - 10; 100; 150; 200; 300; 400; 500; 600; 700; 800	Pilot Duty: 470 VA @ 600 Vac B600; General Purpose: 10 A @ 240 Vac	341 - 528 V	3		IP20 (finger safe)	0 - 999 s	Voltage: ±0.5% of nominal voltage; Current: ±1% (<100 A direct); Power: ±2%	All faults except undercurrent: 2 - 500 m; Undercurrent: 2 - 500 m 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)	Max conductor size: 0.65 in (with insulation)	100	IEC: 61000-4-5 Level 3 2 kV line-to-line; Level 4 4 kV line-to-ground	±0.5 s	5 s (default)	340 - 523 V	±1%	2 - 25% or 999 (disabled)
Series: 777-KW/HP-P2 - Littelfuse 777-KW/HP-P2 Current & Voltage Monitor Provides Exceptional Protection Series: 777-KW/HP-P2 Littelfuse 777-KW/HP-P2 Current & Voltage Monitor Provides Exceptional Protection	Request Sample View More	200 - 480 Vac	SPDT - Form C	Torque: 7 in-lbs	2 - 20 (looped conductors required); 20 - 90 (direct); 90 - 800 (external CTs required)	3.05 H x 3.85 W x 5.05 D in. (77.5 x 97.8 x 128.3 mm)	0 Kg (kilogram)	02 - 60; J02 - J60; L00 - L60; or OFF	(20 - 100 A) … MULT of 80 - 140% of CT primary	COM: C00 - C07; RS485: A01 - A99	±3% (<100 A direct)	2 - 50% or 999 (disabled)	±15%	(3 - 20) … MULT or 12 - 40% of CT primary or OFF	10 - 95% non-condensing per IEC 68-2-3	50 / 60	10	1 - 10; 100; 150; 200; 300; 400; 500; 600; 700; 800	Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac	172 - 528 V	3	Power Scale: 1 = 0.01 - 0.99 kW; 2 = 1.00 - 9.95 kW; 3 = 10.0 - 99.5 kW; 4 = 100 - 650 kW; 5 = 0.01 - 1.32 hp; 6 = 1.34 - 13.3 hp; 7 = 13.4 - 133 hp; 8 = 134 - 871 hp; Low Power: 0.01 - 650 kW or 0.01 - 871 hp or 0 (off); LP setting is dependent on PWS setting; PWS must be set prior to LP setting	IP20 (finger safe)	0 - 999 s	Voltage: ±0.5% of nominal voltage; Current: ±1% (<100 A direct); Power: ±2%	All faults except undercurrent: 2 - 500 m; Undercurrent: 2 - 500 m 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)	Max conductor size: 0.65 in (with insulation)	100	IEC: 61000-4-5 Level 3 2 kV line-to-line; Level 4 4 kV line-to-ground	±0.5 s	5 s (default)	170 - 524 V	±1%	2 - 25% or 999 (disabled)
Series: 777-KW/HP-P2 - Littelfuse 777-KW/HP-P2 Current & Voltage Monitor Provides Exceptional Protection Series: 777-KW/HP-P2 Littelfuse 777-KW/HP-P2 Current & Voltage Monitor Provides Exceptional Protection	Request Sample View More	200 - 480 Vac	SPDT - Form C	Torque: 7 in-lbs	1 - 2 (looped conductors required); 2.1 - 9.0 (direct); 10 - 800 (external CTs required)	3.05 H x 3.85 W x 5.05 D in. (77.5 x 97.8 x 128.3 mm)	0 Kg (kilogram)	02 - 60; J02 - J60; L00 - L60; or OFF	(2 - 10 A) … MULT of 80 - 140% of CT primary	COM: C00 - C07; RS485: A01 - A99	±3% (<100 A direct)	2 - 50% or 999 (disabled)	±15%	(0.3 - 2.0) … MULT or 6 - 40% of CT primary or OFF	10 - 95% non-condensing per IEC 68-2-3	50 / 60	10	1 - 2; 25; 50; 75; 100; 150; 200; 300; 400; 500; 600; 700; 800	Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac	172 - 528 V	3	Power Scale: 1 = 0.01 - 0.99 kW; 2 = 1.00 - 9.95 kW; 3 = 10.0 - 99.5 kW; 4 = 100 - 650 kW; 5 = 0.01 - 1.32 hp; 6 = 1.34 - 13.3 hp; 7 = 13.4 - 133 hp; 8 = 134 - 871 hp; Low Power: 0.01 - 650 kW or 0.01 - 871 hp or 0 (off); LP setting is dependent on PWS setting; PWS must be set prior to LP setting	IP20 (finger safe)	0 - 999 s	Voltage: ±0.5% of nominal voltage; Current: ±1% (<100 A direct); Power: ±2%	All faults except undercurrent: 2 - 500 m; Undercurrent: 2 - 500 m 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)	Max conductor size: 0.65 in (with insulation)	100	IEC: 61000-4-5 Level 3 2 kV line-to-line; Level 4 4 kV line-to-ground	±0.5 s	5 s (default)	170 - 524 V	±1%	2 - 25% or 999 (disabled)
Series: 777-KW/HP-P2 - Littelfuse 777-KW/HP-P2 Current & Voltage Monitor Provides Exceptional Protection Series: 777-KW/HP-P2 Littelfuse 777-KW/HP-P2 Current & Voltage Monitor Provides Exceptional Protection	Datasheet Request Sample View More	200 - 480 Vac	SPDT - Form C	Torque: 7 in-lbs	0.5 - 5 (looped conductors required); 5 - 21 (direct); 40 -740 (external CTs required)	3.05 H x 3.85 W x 5.05 D in. (77.5 x 97.8 x 128.3 mm)	0 Kg (kilogram)	02 - 60; J02 - J60; L00 - L60; or OFF	(2 - 10 A) … MULT of 80 - 140% of CT primary	COM: C00 - C07; RS485: A01 - A99	±3% (<100 A direct)	2 - 50% or 999 (disabled)	±15%	(3 - 20) … MULT or 12 - 40% of CT primary or OFF	10 - 95% non-condensing per IEC 68-2-3	50 / 60	10	1 - 10; 100; 150; 200; 300; 400; 500; 600; 700; 800	Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac	172 - 528 V	3	Power Scale: 1 = 0.01 - 0.99 kW; 2 = 1.00 - 9.95 kW; 3 = 10.0 - 99.5 kW; 4 = 100 - 650 kW; 5 = 0.01 - 1.32 hp; 6 = 1.34 - 13.3 hp; 7 = 13.4 - 133 hp; 8 = 134 - 871 hp; Low Power: 0.01 - 650 kW or 0.01 - 871 hp or 0 (off); LP setting is dependent on PWS setting; PWS must be set prior to LP setting	IP20 (finger safe)	0 - 999 s	Voltage: ±0.5% of nominal voltage; Current: ±1% (<100 A direct); Power: ±2%	All faults except undercurrent: 2 - 500 m; Undercurrent: 2 - 500 m 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)	Max conductor size: 0.65 in (with insulation)	100	IEC: 61000-4-5 Level 3 2 kV line-to-line; Level 4 4 kV line-to-ground	±0.5 s	2 - 999 s (default)	170 - 524 V	±1%	2 - 25% or 999 (disabled)