Energy

Volt-free indication of hazards in power distribution and power generation plants

Usage of the FSM10 drop flap fault indicator

For the monitoring of transformer feeder panels it is of great advantage for the plant operators and plant constructors to realize the monitoring with fail-safe displays. This serves to quickly identify sources of failures in a de-energized state and therefore to a quick elimination of said failures. With fail-safe displays, fault alarms such as temperature tripping, ground fault, automatic machine failure, UMZ tripping, Buchholz tripping, pick-up switching, tripping by a high-voltage fuse etc. are also displayed in the de-energized state. The standard display modules such as panel-mounted fault indicators are not capable of fulfilling that requirement.

Schalttechnik Nord has been solving this problem highly successfully for many years with the FSM10 drop flap fault indicator from EES in Backnang. Managing director Ivan Doutlik reports on the positive aspect of using the FSM10 in the feeder panels. „There are not only advantages for the customer due to the simple and fail-safe reporting of operating states and faults, but the switchgear manufacturer also has an advantage due to a significant simplification in the testing and commissioning of the systems on site.“ During the kick-off meeting, the question often arises as to how faults are read out and displayed, since plants are also without a connection to the BMS. Especially for main power supplies, this is an important point, says Mr. Doutlik: „In this way, the customer and planner can usually be convinced of the necessity of monitoring with the FSM 10 drop flap fault indicator.“

The highlight of the FSM10 is that 10 of these fail-safe indicators with mechanical drop flaps are combined in an extremely compact, space-saving device measuring 96 x 96 mm. In most cases, 8 - 9 fault indications are quite sufficient to monitor a transformer, confirms Mr. Doutlik. If more than 10 messages are needed, up to four devices can be cascaded via the CAN bus interface. A big plus of the FSM 10 is not only the display during a de-energized state. The compact design, the acoustic warning in the device, outputs for warning lamps and external acoustic detectors are also available. In addition, the status LED on the drop flaps and the self-monitoring of the device round off the overall picture of the FSM10.

• 10 drop flap elements with integrated LED in one compact unit
• Display of alarms even in de-energized state
• 6 galvanically separated, freely parameterizable funtion inputs
• Permanent event log
• Parameterizable via DIP switches and/or software
• Cascadable up to 40 alarms