Littelfuse 777-KW/HP-P2, 777-KW/HP-P2 Series, 3-Phase Current & Voltage Monitor, 200-480VAC, 2-800A (external CTs required above 90A)
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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.
Applications
• Conveyor systems
• HVAC equipment
• Saws and grinders
• Fan motors
Specifications
| Frequency | 50/60Hz |
| Functional Characteristics | |
| TC-Overcurrent Trip Class | 02-60, J02-J60, L00-L60 or OFF |
| Output Characteristics | |
| Output Contact Rating (SPDT - Form C): |
Pilot duty rating 480VA @ 240VAC, B300 General purpose 10A @ 240VAC Pilot duty rating for HVR model 470VA @ 600VAC, B600 |
| General Characteristics | |
| Ambient Temperature Range: |
Operating -20° to 70°C (-4° to 158°F) Storage -40° to 80°C (-40° to 176°F) |
| Accuracy: |
Voltage ±1% Current ±3% (<100 amps direct) Power ±4% (<100 amps direct) GF Current ±15% Timing ±0.5 second |
| Repeatability: |
Voltage ±0.5% of nominal voltage Current ±1% (<100 amps direct) Power ±2% Maximum Input Power 10 W |
| Pollution Degree | 3 |
| Class of Protection | IP20 |
| Relative Humidity | 10-95%, non-condensing per IEC 68-2-3 |
| Terminal Torque | 7 in.-lbs. |
| Standards Passed | |
| Electrostatic Discharge (ESD) | IEC 61000-4-2, Level 3, 6kV contact, 8kV air |
| Radio Frequency Immunity (RFI), | Conducted IEC 61000-4-6, Level 3 10V/m |
| Radio Frequency Immunity (RFI), | Radiated IEC 61000-4-3, Level 3 10V/m |
| Fast Transient Burst | IEC 61000-4-4, Level 3, 3.5 kV input power |
| Short Circuit Rating | 100kA |
| Surge | |
| IEC | 61000-4-5, Level 3, 2kV line-to-line; Level 4, 4kV line-to-ground |
| ANSI/IEEE | C62.41 Surge and Ring Wave Compliance to a level of 6kV line-to-line |
| Hi-potential Test | Meets UL508 (2 x rated V +1000V for 1 minute) |
| Vibration | IEC 68-2-6, 10-55Hz, 1mm peak-to-peak, 2 hours, 3 axis |
| Shock | IEC 68-2-27, 30g, 3 axis, 11ms duration, half-sine pulse |
| Maximum Conductor Size | |
| (with insulation) through 777 | 0.65” |
| Dimensions |
H 77.47 mm (3.05”) W 97.79 mm (3.85”) D 128.27 mm (5.05”) |
| Weight | 1.56 lbs. (24.96 oz., 707.6 g) |
| Mounting Method | Surface mount (4 - #8 screws) or DIN rail mount |
| Certification & Compliance |
UL UL508, UL1053 (File #E68520) CE IEC 60947-1, IEC 60947-5-1 CSA C22.2 |