Protection Relays

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External network and system protection (NS protection) used to disconnect power generation systems from the grid by coupling switches in the event of inadmissible threshold values. If voltage and frequency measurements on the power generation system are outside the thresholds required in applicable standards (such as G59/3)

Anti-Islanding Boxes

These anti-islanding boxes come complete and pre-wired for easy  installation. The anti-islanding device consists of a Ziehl anti-islanding relay (model UFR1001E or model SPI1021), the required circuit breakers and a 63A contactor.

Some inverters are not certified to connect to the UK grid, these anti-islanding boxes can enable them to be connected. No interface with the inverter is required.

G59/3SOLN-1 | 63A anti-islanding box for single-phase systems, complies with:

  • G83/2 and G59/3

G59/3SOLN-3 | 63A anti-islanding box for single-phase systems, complies with:

  • G83/2 and G59/3
  • VDE-AR-N 4105
  • ÖVE/ÖNORM E 8001-4-712
  • DIN V VDE V 0126-1-1/A1 / NOI-RES_13E
  • NRS-097-2-1
Anti-Islanding Box Closed
Anti-Islanding Box Open
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Product Code Description Retail Price
(ex VAT)
G59/3SOLN-1 Single phase G59/3 anti-islanding box 63A £712.32
G59/3SOLN-3 Single & Three phase G59/3 anti-islanding box 63A £808.92

G59/3 anti-islanding protection relay

  • Pre-configured controller set to comply with G59/3 settings.
  • Password protected.
  • For single phase or three phase systems
  • Continuous monitoring of the phase and line-to-line voltage
  • Measured values are continuously shown on a backlit graphical LCD display.
  • The last 300 distribution network faults leading to tripping of relays can be recalled with time stamp/realtime clock.
  • Monitoring of the connected coupling switch (configurable: NC/NO/off)
  • Islanding detection df/dt (ROCOF)
  • Vector shift
  • RS-485 interface for data exchange, parameter setting, software update
  • Test function for the determination of the disconnection time
  • Test button for the trigger circuit
  • Separate switching conditions after a threshold infringement
  • Language selection (German, English, Italian)
  • Remote shutdown via ripple control signal receiver
  • Sealable enclosure

Additional contactor required

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Product Code Description Retail Price
(ex VAT)
G59/3RLY-1 G59/3 relay control 3 phase password protected £573.50