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5 years ago

Bender Renewable Energy

  • Text
  • Insulation
  • Monitoring
  • Photovoltaic
  • Electrical
  • Faults
  • Installation
  • Unearthed
  • Voltage
  • Availability
  • Residual

G Solutions for

G Solutions for electrical safety Electrical safety for efficient use of renewable energy Making efficient and reliable use of natural energy resources, that is the system operator's aim, regardless of whether these are solar, wind, hydro or biogas systems. Bender offers proven, tried-and-tested and reliable solutions for ■■ early detection of possible electrical hazards ■■ minimisation of failure risks and operational interruptions ■■ ■■ guaranteed safety of persons and plants immediate recognition of critical operating statuses of electrical installations ■■ ■■ guaranteed high system availability by means of preventive intervention efficient system data mangement. earthed systems Network and system protection (NS protection/VDE-AR-N 4105) VMD460 RCMB100 Page 9 G RCMA126 Page 6 isoPV425 Page 10 RCMS Page 3 Page 5 isoPV Generating plants connected to the medium-voltage network Page 4 iso685 EDS Page 7+8 unearthed systems G 2 Combined heat and power plants Wind energy plant Photovoltaic systems

G High availability of wind energy plants Early detection instead of downtimes If the issue is the high availability and reliability of wind energy plants, the operators have only one goal – to prevent any unexpected failure or malfunctions in day-to-day operation, as a failure means financial losses. A crucial role is played here by the electrical safety. An unexpected insulation fault often means unexpected downtime or an increased risk of fire. Also unplanned service visits are expensive in terms of time and money. The most common cause for insulation faults resp. fault currents is defective insulation due to ■■ ■■ ■■ Physical damage to wires by – vibration – torsion – wide temperature range Too low insulation resistance by – moisture – gear oil and und hydraulic oil – dirt Lightning strokes Fault currents or insulation faults have serious consequences, e.g.: ■■ ■■ ■■ ■■ ■■ ■■ High costs due to operational interruptions Risk of fire at power dissipation > 60 W Failure of safety-critical systems Unplanned maintenance measures Unexpected triggering of protective devices Hazards for maintenance personnel Residual current monitoring device / system (RCM/RCMS) in practice – protection against unexpected shutdown and risk of fire In earthed systems Obtain your edge of information with RCMs Risk of fire due to insulation fault (P > 60 W) What should you do? ■■ ■■ ■■ Permanently monitor the residual current on important components Install residual current monitoring devices / systems in addition to existing protective devices Keep the insulation resistance of the installation high by immediately localising and rectifying insulation faults Your benefits ■■ Increased availability of the installation ■■ ■■ ■■ ■■ Personnel, fire and installation safety Increased rate of return on the installation due to reduced downtimes No unexpected shutdown, fault currents in the mA range are detected at an early stage and signalled Service visits can be better planned 3