G59 Testing for Solar farms
G59 Testing is an essential step in connecting solar farms now established across the UK to the network. Engineering recommendation G59 sets out the standards required for the connection of a Generating Plant to the Distribution Systems of a licensed Distribution Network Operator (DNO). It states the requirements that you must meet before your local DNO will allow your Generating Plant to be connected to the network.
If your connection doesn’t fall under G83 then it classes as a G59 connection as it will be for generation of over 16 amps per phase.
G59/2 Testing
G59 witness testing and commissioning with DNO (Distribution Network Operator) presence for G59 relay and system approval has to be carried out across the whole UK. These tests are applicable to PV (photovoltaic) solar panel installations, wind power installations and CHP (combined heat and power) installations greater than 50kW 3-phase (16A per phase).
Engineering Recommendation G59/2 states include 2-stage over/under voltage, 2-stage over/under frequency, vector shift or ROCOF (rate of change of frequency), LOS (loss of mains) and control supply failure.
The best companies will issue tailored result sheets signed by test engineers and the DNO protection engineer representative which consist of all parameters required by the DNO according to Engineering Recommendation G59/2. These sheets represent the recordable test data required by the DNO to enable connection.
We also offer a pre-commissioning service where we can assess the operation of the G59 panel interface with the dual energy system prior to the DNO witness test visit.
