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777-KW/HP-P2 PDF预览

777-KW/HP-P2

更新时间: 2024-11-21 14:56:39
品牌 Logo 应用领域
力特 - LITTELFUSE /
页数 文件大小 规格书
4页 287K
描述
The 777-KW/HP-P2 three-phase current and voltage monitor provides protection with input voltage from 200–480 V ac and motor full load ampere range as follows: 2–20 A (looped conductors required); 20–90 A direct; 90–800 A (external CTs required).

777-KW/HP-P2 数据手册

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Motor and Pump Protection Relays  
777-KW/HP-P2 Series  
3-Phase Current & Voltage Monitor  
Power is Linear, equal  
Current is not linear, low  
sensitivity for low loads  
and high sensitivity  
for high loads.  
sensitivity at both  
low and high  
loads.  
No Load  
Full Load  
No Load  
Full Load  
Description  
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.  
Features & Benefits  
FEATURES  
BENEFITS  
Visual indication for programming, viewing real-time voltage, current,  
kilowatts, horsepower, and last fault code  
Built-in display  
Programmable voltage and current settings  
3 selectable restart options  
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  
3 programmable restart delay timers  
Remote display compatibility  
Flexible reset  
Increases safety through remote display of real-time data and fault  
history without the need to open the cabinet. Aids with arc flash  
safety regulations.  
Reset can be done through a push button on the relay or remotely  
with optional 777-MRSW or OL-Reset remote reset kit  
Applications  
• Conveyor systems  
• HVAC equipment  
• Saws and grinders  
• Fan motors  
Littelfuse.com/777kwhpp2  
©2022 Littelfuse, Inc.  
Specifications are subject to change without notice.  
1 of 4  
Revised: 10/03/2022  

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