The compact solution HSBT 7VU683 is designed to fit for the primary diagrams of single busbar (2 CBs) and segmented single busbar (3 CBs). It has incorporated the traditional HSBT philosophy. Additionally, the unique Real Time Fast Transfer mode helps to improve the efficiency.
Permanent availability of electricity is essential for reliable production of a great number of processes in power stations and industrial plants where lots of inductive motor areinstalled. To achieve this, a busbar is normally equipped with two or more independent in-coming power sources to provide the possibility to switch to standby source in case of main source interruption or failure.
The power supply interruption with tens of millisecond has small impact to rotating loads. Thus, the High Speed Busbar Transfer (HSBT) device helps to control and monitor the progress to ensure the fast but reliable switching-over. It can be initiated manually or automatically.
Based on the existing world-wide used SIPROTEC 4 platform, the reliability, stability and efficiency of HSBT 7VU683 are guaranteed. Thanks to its powerful and flexible performance, multi functions are integrated into one system, e.g, power supply transfer, relay protection and supervision.
The integrated protective functions are to protect the tie-CB in segmented single busbar diagram against short-circuitand ground fault. The integrated supervision functions are to monitor the voltage phase sequence and voltage secondary circuit , then gives out alarm in case of failure.
The integrated programmable logic (CFC) allows the users to implement their own functions. The flexible communication interfaces are open for modern communication architectures with control system.
– IEC 61850
– IEC 60870-5-103
– MODBUS RTU
– DIGSI 4
– DIGSI 4
High speed busbar transfer function
- NORMAL condition
- FAULT condition
- Inadmissible under-voltage
- Inadmissible under-frequency
- Inadvertent CB open
- PARALLEL Auto switching sequence
- PARALLEL Half-Auto switching sequence
- SIMULTANEOUS switching sequence
- SEQUENTIAL sequence
- FAST transfer mode
- REAL-TIME FAST transfer mode
- IN-PHASE transfer mode
- RES-VOLT transfer mode
- LONG-TIME transfer mode
Single busbar and segmented single busbar supported
High speed contact with approx.1ms for closing
Permission of bi-direction switching settable
Low voltage load-shedding settable
CB de-coupling when OPEN failed
NORMAL start locally or remotely
Manual CB closing to block HSBT
ON/OFF set locally or remotely
HSBT test mode supported
Protection functions for tie-CB
Ground overcurrent protection
Overcurrent protection for busbar energization
Ground overcurrent protection for busbar energization
Self-supervision of the device
Oscillographic fault recording
Phase sequence of busbar voltage
Voltage circuit of busbar and line
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