Undercurrent Protection
Overview of Functions
The Undercurrent protection function (ANSI 37):
•
Detects the going current in a feeder after the opening of the infeed circuit breaker
•
Detects the loss of loads
•
Detects and protects pumps from running idle
Structure of the Function
The Undercurrent protection function is used in protection function groups with current measurement.
The Undercurrent protection function comes with 1 protection stage preconfigured at the factory. A
maximum of 2 protection stages can be operated simultaneously in this function. The protection stages are
structured identically.
[lostuundcu-150813, 2, en_US]
Figure 6-150 Structure/Embedding of the Function
6.16
6.16.1
6.16.2
Protection and Automation Functions
6.16 Undercurrent Protection
628 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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