1MAC309294-MB F
Section 4
Protection functions
RER620
189
Technical Manual
4.3.1.2
Function block
Figure 85:
Function block
4.3.1.3
Functionality
The single-phase overvoltage protection 59 is applied on power system elements, such as
generators, transformers, motors and power lines, to protect the system from excessive
voltages that could damage the insulation and cause insulation breakdown. The
three-phase overvoltage function includes a settable value for the detection of overvoltage
either in a single phase, two phases or three phases.
59 includes both definite time (DT) and inverse definite minimum time (IDMT)
characteristics for the delay of the trip.
The function contains a blocking functionality. It is possible to block function outputs,
timer or the function itself, if desired.
4.3.1.4
Operation principle
The function can be enabled and disabled with the
Operation
setting. The corresponding
parameter values are Enable and Disable.
The operation of the single-phase overvoltage protection can be described by using a
module diagram. All the modules in the diagram are explained in the next sections.
V_B_BC
BLOCK
OPERATE
START
59
V_A_AB
V_C_CA
OPR_A_AB
OPR_B_BC
OPR_C_CA
ST_A_AB
ST_B_BC
ST_C_CA
Содержание RER620
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Страница 22: ...Section 1MAC309294 MB F 16 RER620 Technical Manual ...
Страница 88: ...Section 3 1MAC309294 MB F Basic functions 82 RER620 Technical Manual ...
Страница 278: ...Section 4 1MAC309294 MB F Protection functions 272 RER620 Technical Manual ...
Страница 362: ...Section 5 1MAC309294 MB F Control functions 356 RER620 Technical Manual ...
Страница 418: ...Section 7 1MAC309294 MB F Measurement functions 412 RER620 Technical Manual ...
Страница 428: ...Section 8 1MAC309294 MB F Recording functions 422 RER620 Technical Manual ...
Страница 464: ...Section 9 1MAC309294 MB F Other functions 458 RER620 Technical Manual ...
Страница 554: ...Section 10 1MAC309294 MB F General function block features 548 RER620 Technical Manual ...
Страница 568: ...Section 12 1MAC309294 MB F Relay physical connections 562 RER620 Technical Manual ...
Страница 574: ...Section 13 1MAC309294 MB F Technical data 568 RER620 Technical Manual ...
Страница 576: ...Section 14 1MAC309294 MB F Relay and functionality tests 570 RER620 Technical Manual ...
Страница 578: ...Section 15 1MAC309294 MB F Applicable standards and regulations 572 RER620 Technical Manual ...
Страница 582: ...Section 16 1MAC309294 MB F Glossary 576 RER620 Technical Manual ...
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