Page 142 - Sace Emax 2 Manual for design engineers

ABB | SACE Emax 2
2 - Load Shedding

Description The Load Shedding function allows faults to be managed in installations which are able to function thanks
to the energy produced by renewable and local energy sources, especially the absence of power supply
caused, for example, by a fault on the MV voltage side.
This function is available in two versions:
• Basic, supplied with all the Ekip Touch Trip units
• Adaptive; can be purchased by means of the relative additional package and is available for all Trip units
with the Measuring Measurements package
All the parameters and measurements of the function are available via Ekip Connect; however, the Trip unit
allows certain of them to be set and displayed, as described below.
IMPORTANT: consult the Technical catalog or White paper of the function for full
details (page 13, 16).

Ekip Touch Parameter Certain configuration parameters of the function are available in the Settings - Load Shedding menu (page46).

NOTE: it is advisable to first configure the parameters via Ekip Connect, and only then operate
on the Trip unit

Parameter Description Default
Enable Activates/deactivates the function and its availability in the parameters menu Off
Display of the version of the function, Basic or Adaptive
Version NOTE: with the Basic version, the only parameter available is --
Reconnection Timeout
Solar Plant present Establishes whether the microgrid includes a solar energy system (Off/On) Off
Available with Solar Energy System Present = On, defines the rated power of
SolarPlant its solar energy system.
NominalPower The value is given in kW and can be set within the range: 100 kW to 65535 100 kW
kW, in 1 kW steps
ATS Establishes whether the installation has an ATS system (Off/On) Off
Available with ATS=On, defines the power received from the ATS branch;
Generator Power . . . .
can be set within the range: 0 kW (. . . .) to 10000 kW, in 1 kW steps
Defines the instantaneous frequency variation that activates Load shedding
Frequency slope The value is given as absolute value (Hz/s) and can be set within the range: 0,6 Hz/s
0.6 Hz/s to 10 Hz/s in 0.2 Hz/s steps
Control threshold of the minimum frequency that activates Load shedding
F W Warning (1) The value is given as absolute value (Hertz) and can be set within the range: 3 Fn
0.9 Fn to 1.1 Fn in 0.001 Fn steps
Defines the time employed by the Trip unit between reconnection of one load
Reconnection and the next, after the main CB has reclosed. The value is given as absolute 10 s
Timeout
value (s) and can be set within the range: 1 s ÷ 1800 s, in 1 s steps

NOTE: Load shedding activates if the monitoring conditions defined by the Frequency slope
and F W Warning parameters are present at the same time

140 | © 2020 ABB | 1SDH001330R1002 - ECN000134959 - Rev. A Ekip Touch - Additional functions | 2 - Load Shedding