ABB Network Partner AB
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Function:
1 General overview
The aim of the Disturbance Report is to contribute to the highest possible
quality of electrical supply. This is done by a continuous collection of sys-
tem data and, upon occurrence of a fault, by storing a certain amount of
pre-fault, fault, and post-fault data.
The stored data can be used for analysis and decision making to find and
eliminate possible system and equipment weaknesses.
The Disturbance report is a common name for several facilities to supply
the operator with more information about the disturbances and the system.
Some of the facilities are basic and some are optional in the different
products. For some products not all facilities are available.
The facilities included in the Disturbance report are:
• General disturbance information
• Indications
• Event Recorder
• Fault locator
• Trip values (phase values)
• Disturbance Recorder
The whole Disturbance Report can contain information for up to 10 dis-
turbances, each with the data coming from all the parts mentioned above,
depending on the options installed. All information in the Disturbance
Report is stored in non-volatile flash memories. This implies that no infor-
mation is lost in case of loss-of-power supply.
Fig. 1 Disturbance report structure
Up to 10 disturbances can always be stored. If a new disturbance is to be
recorded when the memory is full, the oldest disturbance is over-written
by the new one. The nominal memory capacity for the Disturbance
Recorder is measured with 10 analogue and 48 binary signals recorded,
which means that in the case of long recording times, fewer than 10 dis-
Disturbance Report
Disturbance no.2
Disturbance no.1
Disturbance no.10
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