124
Two step time delayed phase overcurrent
protection (TOC2)
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Prepare the terminal for test as outlined in section “Preparing for test” in this chapter.
Ensure that the maximum continuos current of a terminal does not exceed four times its
rated value, if the measurement od the operating characteristics runs under constant
voltage conditions.
To verify the settings the following fault type should be tested:
•
One for a phase-to-earth fault
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The operate time shall be tLow+operate time of the low set stage.
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If I>Low is set higher than I>Inv, check that there is no trip signal
TOC2-TRLS when the current is less than I>Low.
Содержание REL 531
Страница 16: ...10 Note signs KDSWHU 6DIHW LQIRUPDWLRQ ...
Страница 44: ...38 Checking the binary I O circuits KDSWHU KHFNLQJ WKH H WHUQDO FLUFXLWU ...
Страница 52: ...46 Checking the self supervision signals KDSWHU QHUJLVLQJ WKH WHUPLQDO ...
Страница 132: ...126 Two step time delayed phase overcurrent protection TOC2 KDSWHU 9HULI LQJ VHWWLQJV E VHFRQGDU LQMHFWLRQ ...
Страница 136: ...130 Testing the interaction of the distance protection KDSWHU 9HULI LQJ WKH LQWHUQDO FRQILJXUDWLRQ ...
Страница 140: ...134 Testing the interaction of the distance protection KDSWHU 7HVWLQJ WKH SURWHFWLRQ V VWHP ...