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13-7
Determination of Operating Voltage
General Recommendation for Connectors in Common Applications
Technical Information
Electrical Data
IEC 60664: Generic standard recommended for typical electrical devices. It takes into account long term
degradation of insulating materials under variable aggressive environmental influences and uses creepage
distance as calculation basis for the operating voltage.
Fischer Connectors recommends the use of IEC 60664 in the general multipole connector specifications,
unless other more specific standard or regulations are applicable to the design. For example,
IEC 60601 provides adequate special guidelines for medical devices.
For cases where the connector “on-time” or duty cycle is low, and there is little exposure to environmental
factors, for example scientific instruments or similar equipment, other previous standards such as former
IEC 60130-1 can be used. It does not take into consideration either long term environmental effects,
or the specific behaviour of different insulator materials and uses test voltage as calculation basis
for the operating voltage
Former IEC 60130-1 recommends to set the operating voltage at
■ 0.33 x test voltage for 500V < test voltage < 3kV
■ 0.66 x test voltage for test voltage ≥ 3kV
Similar recommendations are provided in EIA-364-20 (MIL-STD-1344 method 3001 superseded).
For more details see www.fischerconnectors.com/technical