Hitachi H20-T Technical Notes page 24

(3) E lect r ica l endu r a nce cu r ve
Wh en lon g elect r ica l en dur a n ce is r equ ir ed, select elect roma gn et ic con t act or s usin g followin g en du ra n ce cur ve.
(a ) AC200V class m otor (AC3)
F ig. 17 E ndu r a nce cu r ve (AC200V)
(b) AC400V class m otor (AC3)
F ig. 18 E ndu r a nce cu r ve (AC400V)
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