Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields

Introduced: September 1968

Full Title

Details of transformers or inductances, in general > Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields

CPC subdivides this area 3x more granularly than IPC with 4 additional codes.

4 codes are CPC-only extensions.

Note: 1 CPC extensions are marked as secondary classification only.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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H01F 2027/348 2nd only CPC only CPC only
H01F 27/341 CPC only CPC only
H01F 27/343 +1 CPC CPC only CPC only
H01F 27/346 CPC only CPC only
H01F 27/36 Electric or magnetic shields or screens (movable for varying inductance H01F21/10) +3 CPC IPC+CPC Available in IPC and CPC
H01F 27/38 Auxiliary core members; Auxiliary coils or windings +1 CPC IPC+CPC Available in IPC and CPC