• Password protection
• Self-supervision & internal diagnostics
2.1.2 Measurement, Recording & Post Fault Analysis
• Metering of Phase currents
• Metering of Neutral currents-derived and measured
• Measurement of thermal state
• Positive and Negative sequence current
• Ration of negative to positive sequence current
• Breaker operation counter
• Breaker trip counter
• Breaker operating time
• Up to 512 time tagged event records
• Up to 5 Fault records
• Up to 5 disturbance records
2.1.3 Front Panel Interface
• 6 LEDs for status indication
• Backlit LCD display (16 x 2)
• 6 navigation keys for setting and interrogation
2.1.4 Communications
• Front USB port for real-time data viewing, device setting, and upload/download.
• Rear EIA (RS) 485 port for SCADA communication
• Multiple protocols - Modbus/ IEC60870-5-103
2.2 Functional Overview
ANSI FUNCTION P153
50 Definite time overcurrent
•
50N Neutral/Earth definite time overcurrent
•
51 IDMT overcurrent
•
51N Neutral/Earth IDMT overcurrent
•
68 Inrush Blocking
•
49 Thermal Overload
•
37 Undercurrent detection
•
46 Negative sequence overcurrent
•
46BC Broken conductor
•
50BF Circuit breaker fail
•
CLP Cold load pick-up
•