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100 Hz protection (HHZ)
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The parameters for the 100 Hz protection function are set via the local HMI or PST (Pa-
rameter Setting Tool). Refer to the Technical reference manual for setting parameters
and path in local HMI.
The setting of the operate value for the 100 Hz measuring element, I100> must be great-
er than the highest permissible 100 Hz current on the protected catenary. An additional
margin of at least 20% in addition to the declared inaccuracy of the current transformers
and the measuring element should be allowed for in the setting.
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