Dielectric strength
A distinction should be made between:
- Dielectric strength/current resistance (destruction limit): exceeding this limit can result in irreversible changes to the electronics, up to and including destruction.
- against a specified reference ground
- differential
- Unless otherwise stated, the destruction limit refers to a permanent condition. Information on short-term tolerable overload can often only be given in individual or simple load cases, as general information usually requires a great deal of testing (How often does the case occur? How long is the recovery time afterwards? How high is the overload? Does it have a damaging effect, generate heat or something else?)
- Recommended operating voltage range/operating current range: If this is exceeded, operation in accordance with the specification can no longer be assumed; the value is also determined in this case
- against a specified reference ground
- differential
- This value is always below the destruction limit.
Fig.37: Recommended operating voltage rangeSpecial specification details can be provided in the device documentation, e.g. taking into account:
- Self-heating, ambient conditions
- Rated voltage
- Insulating strength
- Edge steepness of the applied voltage or holding periods
- Normative environment (e.g. PELV)