EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS

**Definition:** This place covers:

Emergency electric circuit arrangements for the automatic protection of electric equipment used for generation, conversion, transmission or distribution of electric power in the event of an abnormal operating condition.

Thus the scope of this subclass is limited to protective circuits for the protection of power systems for: generating electric power (alternators, generators), converting electric power (power convertors in HVDC links, power motors for industrial applications, power transformers), transmission of electric power (High Voltage AC or HVDC lines or cables) or distribution of electric power (Medium voltage lines, cables and distribution switchgear and Low Voltage lines, cables and switchgear up to the sockets of secondary customers)

In this subclass, the protective circuit arrangements are classified :

A. according to the measures taken:

B. or/and by the device being protected, e.g. transformer, motor...

C. or/and by the model used to simulate the device

D. by details of one of the above, e.g. detection means

**Limiting references (this place does not cover):** - Protection involving charging/discharging batteries: -> H02J7/00 - Structural association of protection devices with motors or generators -> H02K11/00 - Protecting converters by control -> H02M1/32 - Protecting electric motors (e.g. providing protection against - overload) by control -> H02P