Siemens SENTRON VL Series System Manual page 10

Introduction and overview
1.1 General information
Utilization of the resulting possibilities turns a circuit breaker into something more than just a
switching and protection device. Only when the automation and low-voltage switchgear and
controlgear used can be fully integrated into a communication solution in a user-friendly and
fully functional way, can the following functions be implemented:
● Integrated communication
● Data acquisition
● Forwarding
● Evaluation
● Visualization of data
Data acquisition and evaluation
Status information, alarm messages, trigger information, and threshold violations (e.g.
overcurrent, phase unbalance, overvoltage) are acquired and forwarded. Transparency in
power distribution enables a fast response to such statuses. Important messages can be
transmitted to the cell phones of the maintenance personnel as text messages by means of
additional modules (e.g. WinCC and Funkserver Pro). Timely evaluation of this data enables
selective intervention in the process and prevents plant failures.
Maintenance
Information for preventive maintenance (e.g. number of switching cycles or operating hours)
enables timely planning of personnel and material. This increases the level of plant
availability. Destruction of sensitive system components due to failures is prevented.
Communication helps to provide specific information about the location and cause of power
failures. Recording of phase currents allows precise determination of the cause of the fault
(e.g. triggered by short circuit of 2317 A in phase L2 on 27.08.2007 at 14:27). This is the
basis for fast correction of the fault and creates a significant potential for cost savings.
Statistics and cost-effectiveness
Recording of power, energy and the power factor cos φ opens up further possibilities.
Energy profiles can be created and the costs can be clearly allocated thanks to the
transparent representation of energy consumption for business administration analysis.
Energy costs can later be optimized by compensating for load peaks and troughs.
Modular and intelligent
The SENTRON circuit breaker program consists of a small number of components with a
host of combination options, and it encompasses a performance range from 16 A to 6300 A.
The versatility in power distribution achieved by this modularity enables low-cost, flexible
integration of the SENTRON circuit breakers into higher-level system solutions using
communication.
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3WL/3VL circuit breakers with communication capability - PROFIBUS
System Manual, 03/2011, A5E01051353-02