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IEVref:447-05-11ID:
Language:enStatus: Standard
Term: start time
Synonym1: pick-up time
[Preferred]
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Definition: duration between the instant a specified change is made in the value(s) of the input energizing quantity(ies) that will cause the measuring relay or protection equipment in initial condition or reset condition to start (pick up) and the instant it starts (picks up)

characteristic quantity (for under... relay) characteristic quantity (for over... relay) initial condition start value start value start time start start conditionoutput signals

Figure 3 – Explanatory diagram for start condition (pick-up condition)

characteristic quantity (for under... relay) characteristic quantity (for over... relay) start value start value operate value operate value start operate start time operate time output signals operate signal

Figure 4 – Relation between start time (pick-up time) and operate time

Note 1 to entry: The relation between start time (pick-up time) and operate time is shown in Figure 4.


Publication date:2020-05
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