ABB Microshield O/C Instruction Booklet IMRA474126-MIB Issue D June 2000 (IB–7.2.1.7–16) ABB Automation Inc. Substation Automation and Protection Division 7036 Snowdrift Road Allentown, PA 18106 USA Tel: (610) 395-7333 Technical Support: 800-634-6005 Fax: (610) 395-1055 ABB Microshield O/C Contents Section 1 - Product Overview Section 2 - Getting Started Warnings ............................................................................................................................................................... 2-1 Precautions ........................................................................................................................................................... 2-1 Microshield O/C - Quick Start ................................................................................................................................ 2-1 Initial Tripping .................................................................................................................................................. 2-1 Reclosing ........................................................................................................................................................ 2-2 Review ............................................................................................................................................................ 2-2 Section 3 - Man-Machine Interface Overview ............................................................................................................................................................... 3-1 Changing Settings ................................................................................................................................................. 3-1 LCD Display .......................................................................................................................................................... 3-1 Clearing Targets .................................................................................................................................................... 3-1 Using the Operations Menu ................................................................................................................................... 3-1 Section 4 - Settings Primary Protective Elements ................................................................................................................................. 4-1 Phase Time Overcurrent Element 51P ................................................................................................................. 4-1 Phase Time Overcurrent Element 51LT ................................................................................................................ 4-2 Ground Time Overcurrent Element 51N ................................................................................................................ 4-2 Phase Instantaneous Overcurrent Element 50P .................................................................................................... 4-3 Ground Instantaneous Overcurrent Element 50N ................................................................................................... 4-3 Relay Configuration Settings.................................................................................................................................. 4-3 Trip Fail Timer (Trip Fail) ....................................................................................................................................... 4-3 Demand Time Constant (Dmd Const) .................................................................................................................... 4-4 Reset Mode (Reset) ............................................................................................................................................... 4-4 Voltage Display Mode (V Display) ......................................................................................................................... 4-4 Change Password .................................................................................................................................................. 4-4 Cold Load Time Mode (CLT Mode) ........................................................................................................................ 4-4 Cold Load Timer (Cold Load).................................................................................................................................. 4-4 Zone Sequence (79 ZSC) ...................................................................................................................................... 4-5 Close Fail Time (Close Fail) ................................................................................................................................... 4-5 Real Time Clock .................................................................................................................................................... 4-5 Breaker Counters ................................................................................................................................................... 4-5 Section 5 - Recloser Close Fail Timer (Close Fail).................................................................................................................................. 5-2 Lockout ................................................................................................................................................................. 5-2 Cutout Timer (79 Cutout) ....................................................................................................................................... 5-2 External Reclose Initiate ........................................................................................................................................ 5-3 Limit Timer, Recovery Timer, and Limit Count ....................................................................................................... 5-3 Maximum Reclosures to Lockout (79 RTL) ............................................................................................................ 5-4 Zone Sequence Coordination (79 ZSC) .................................................................................................................. 5-4 Internal and External Reclose Disable ................................................................................................................... 5-4 i ABB Microshield O/C Section 6 - Programmable Inputs and Outputs Programmable Inputs ............................................................................................................................................ 6-1 Programmable Outputs .......................................................................................................................................... 6-1 Programmable Master Trip Contact ....................................................................................................................... 6-2 Seal-In Outputs ..................................................................................................................................................... 6-2 Section 7 - Targets Section 8 - Metering With Optional VT Inputs ........................................................................................................................................ 8-1 Without Optional VT Inputs .................................................................................................................................... 8-1 Load Metering ........................................................................................................................................................ 8-1 Demand Metering .................................................................................................................................................. 8-2 Section 9 - Records Event Records ....................................................................................................................................................... 9-1 Fault Records ........................................................................................................................................................ 9-7 Section 10 - Communications MSOC ASCII Commands .................................................................................................................................... 10-2 Modbus Mode ............................................................................................................................................... 10-2 MSOC ASCII Menu System ................................................................................................................................ 10-2 Discrete ASCII Commands .................................................................................................................................. 10-2 Overview ............................................................................................................................................................. 10-2 Sending Commands ............................................................................................................................................ 10-4 Receiving Commands .......................................................................................................................................... 10-5 Event and Fault Records ..................................................................................................................................... 10-6 Logical I/O States ...............................................................................................................................................