IEC 61643-331 Testing

Components for low-voltage surge protective devices – Part 331: Specification for metal oxide varistors (MOV)

IEC 61643-331 Scope:

IEC 61643 331 and EN 61643 331 testing is for metal oxide varistors (MOV), which are used for applications up to 1000 V A.C. or 1500 V D.C. in power line, or telecommunication, or signaling circuits. They are designed to protect apparatus or personnel, or both, from high transient voltages.

IEC 61643-331 tests apply to MOVs having two electrodes and does not deal with hybrid devices. EN 61643-331 testing also does not apply to mountings and their effect on the MOV’s characteristics. Characteristics given apply solely to the MOV mounted only in the ways described for the tests.

Keystone Compliance assists manufacturers with IEC 61643-331 and EN 61643-331 test compliance. Please contact us for more information on how Keystone Compliance can assist you with identifying and fulfilling your IEC 61643-331 test lab needs.

Related Standards:

IEC 61643-11 Surge protective devices connected to low-voltage power systems – Requirements and test methods

IEC 61643-12 Surge protective devices connected to low-voltage power distribution systems – Selection and application principles

IEC 61643-21 Surge protective devices connected to telecommunications and signaling networks – Performance requirements and testing methods

IEC 61643-22 Surge protective devices connected to telecommunications and signaling networks – Selection and application principles

IEC 61643-311 Performance requirements and test circuits for gas discharge tubes (GDT)

IEC 61643-312 Selection and application principles for gas discharge tubes

IEC 61643-321 Specifications for avalanche breakdown diode (ABD)

IEC 61643-341 Specification for thyristor surge suppressors (TSS)