myenergi Product FAQ'sGrid Limit / Load Curtailment

  1. What is Load Curtailment?
  2. What is the "CT Detect" or G100 setting? / Do I need to have G100 turned on?

1. What is Load Curtailment?

Load Curtailment is the technical term for “reducing demand if my supply is overloaded” i.e. turning some devices off before the fuse blows!

myenergi devices all come with load curtailment built in as standard – you just need to set the Grid Limit to match you main supply fuse rating.  The Grid Limit setting is found on the Advanced Settings menu.  Please refer to the menu information for your product in the printed manual or in this wiki.

If your master device detects that the Grid Limit will be exceeded it sends a message to all connected myenergi devices to immediately reduce their output so that the supply is not overloaded.

Of course, for the Grid Limit to work, it is important that the Grid CT is in the right place and s configured correctly.

2. What is the "CT Detect" or G100 setting? / Do I need to have G100 turned on?

In the UK, the Distribution Companies often refer to a standard “G100”.  This actually refers to the rules for connecting generators to the distribution system but it does include some requirements around the measurement of the power flows from the generator and what should happen if too much power is being exported.

In the absence of a similar standar for Load Curtailment, many distribution companies refer to the “principles of G100” when considering load curtailment schemes.    The important points are:

  • The grid CT needs to be hardwired, adn
  • The grid CT needs to be monitored to make sure that it has not been disconnected

The G100/CT Detect setting in the zappi 2 monitors the grid CT and will stop the charge if it detects that there is a problem.

Full details are included in this document which may be provided to the Distribution Network Operator (DNO) if requested.

How does the Grid Limit work?

This short video explains…