K.128: Surge protective component application guide - metal oxide varistor (MOV) components
Recommendation ITU-T K.appl2 describes metal oxide varistor (MOV) construction, non-linearity modelling, impedance properties, equivalent circuit, element temperature distribution, time factors, degradation and failure modes, operation states and application examples. These surge protective components (SPCs), intended for the protection of exchange and outdoor equipment, subscriber or customer equipment and telecommunication lines from surges.
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