2) Resonance measure

In case surge absorber located between power line to ground; point A in figure, reacts against
the surge, residual voltage is transmitted to the latter part of the circuit. Some part of the circuit
is destroyed because of amplified residual voltage by LC resonance of a noise filter and/or a coil. Potential equalization before and behind the common mode coil by a surge absorber;
GDT2, is recommended as a measure.
Carrying out potential equalization between the terminals of a common mode coil and the both ends of a coil with a surge absorber (GDT2,GDT3) is recommended.

 

 

 

Recommended parts

  AC Withstand Voltage Test GDT1 MOV GDT2 , GDT3
~AC125V
Test is not required CDA70-401L
DE37-401W
220V~270V
(φ10mm)
CDA70-301L
CDA70-401L
CDA70-501M
DE37-401W
DE37-501M
AC1,000V
AC1,200V
CDA70-272M
CDA70L-272M
FA55-272
~AC250V Test is not required CDA70-501M
DE37-501M
470V~680V
(φ10mm)
AC1,500V CDA70-302M
CDA70L-302M
FA55-302
AC1,800V CDA70-362M
CDA70L-362M
FA55-362
AC2,000V FA55-402
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