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(nb polarity of A3 is important!) 110V battery & charger system is required for a new 33kV substation constructed to connect a solar farm. The substation is to be connected using a “looped” connection to the network and the 33kV switchboard consists of two feeder circuit breakers and one metering circuit breaker.
The impact of the increasing number of renewable energy power plants may cause the power grid to face an effect or change the flow pattern of power systems, for example, the reverse power, power variation, etc. Therefore, the Battery Energy Storage System (BESS) has begun to be introduced widely as a part of solutions.
The substation is to be connected using a “looped” connection to the network and the 33kV switchboard consists of two feeder circuit breakers and one metering circuit breaker. Each circuit breaker requires 200 watts for 60 milliseconds for tripping purposes.
Drawings shall bear the substation name and/or the WPD contract reference, as appropriate. All final copies of the schematic / circuit / general arrangement drawings shall be provided in *.dwg (CAD) format. All final copies of the installation / commissioning / maintenance instructions shall be provided in *.pdf (Adobe Reader) format.
EE Spec 25/5 (this document) relates to 110Vdc systems at “metering circuit breaker” type primary network substations. The main changes from the original specification are as follows: This EE Spec is relevant to all staff involved with the planning, design, installation and modification of 110Vdc systems at primary network substations.
The requirements of EE Spec 25/4 shall apply to any project which is sanctioned on or before 30th April 2015. EE Spec 25/4 has been split into two separate specifications, namely EE Spec 23 and EE Spec 25/5. EE Spec 25/5 (this document) relates to 110Vdc systems at “metering circuit breaker” type primary network substations.
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