ABB Relion 670 Series Technical Reference Manual page 19

Technical reference manual
Two step overvoltage protection OV2PTOV (59).................................505
Introduction......................................................................................505
Principle of operation.......................................................................505
Measurement principle...............................................................506
Time delay..................................................................................507
Blocking......................................................................................512
Design........................................................................................512
Function block.................................................................................514
Input and output signals..................................................................514
Setting parameters..........................................................................515
Technical data.................................................................................517
Two step residual overvoltage protection ROV2PTOV (59N)...............518
Introduction......................................................................................518
Principle of operation.......................................................................518
Measurement principle...............................................................519
Time delay..................................................................................519
Blocking......................................................................................524
Design........................................................................................524
Function block.................................................................................525
Input and output signals..................................................................526
Setting parameters..........................................................................526
Technical data.................................................................................528
Overexcitation protection OEXPVPH (24)............................................529
Introduction......................................................................................529
Principle of operation.......................................................................529
Measured voltage.......................................................................532
Operate time of the overexcitation protection.............................533
Cooling.......................................................................................537
Overexcitation protection function measurands.........................537
Overexcitation alarm...................................................................538
Logic diagram.............................................................................539
Function block.................................................................................539
Input and output signals..................................................................540
Setting parameters..........................................................................540
Technical data.................................................................................541
Voltage differential protection VDCPTOV (60).....................................542
Introduction......................................................................................542
Principle of operation.......................................................................542
Function block.................................................................................544
Input and output signals..................................................................544
Table of contents
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