Which code corresponds to the general Time Element Relay?

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Multiple Choice

Which code corresponds to the general Time Element Relay?

Explanation:
Understanding how relay function codes are constructed helps here. In this coding system, the base symbol denotes the general family of devices, and a suffix specifies the particular function. A time element (delay) function is indicated by the suffix that stands for a time-delaying relay. The general time element relay is coded with that suffix, so Ur is used. The other forms would point to different, non-time-delay functions, so they don’t represent the general Time Element Relay.

Understanding how relay function codes are constructed helps here. In this coding system, the base symbol denotes the general family of devices, and a suffix specifies the particular function. A time element (delay) function is indicated by the suffix that stands for a time-delaying relay. The general time element relay is coded with that suffix, so Ur is used. The other forms would point to different, non-time-delay functions, so they don’t represent the general Time Element Relay.

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