ABB SACE Tmax XT5 - 3 - IPS Interface protections

ABB | SACE Tmax XT
Additional functions | 2 - Load Shedding123 | © 2019 ABB | 1SDH002039A1002 - ECN000093027 - Rev. A
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, except Ekip M Touch
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 4, 14).
Ekip Touch Parameter
Certain configuration parameters of the function are available in the Settings - Load Shedding menu (page33).
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
Version
Display of the version of the function, Basic or Adaptive
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
Solar Plant
Nominal Power
Available with Solar Energy System Present = On, defines the rated power of
its solar energy system.
The value is given in kW and can be set within the range: 100 kW to 65535
kW, in 1 kW steps
100 kW
ATS Establishes whether the installation has an ATS system (Off/On) Off
Generator Power
Available with ATS=On, defines the power received from the ATS branch;
can be set within the range: 0 kW (. . . .) to 10000 kW, in 1 kW steps
. . . .
Frequency slope
Defines the instantaneous frequency variation that activates Load shedding
The value is given as absolute value (Hz/s) and can be set within the range:
0.6 Hz/s to 10 Hz/s in 0.2 Hz/s steps
0,6 Hz/s
F W Warning
(1)
Control threshold of the minimum frequency that activates Load shedding
The value is given as absolute value (Hertz) and can be set within the range:
0.9 Fn to 1.1 Fn in 0.001 Fn steps
3 Fn
Reconnection
Timeout
Defines the time employed by the Trip unit between reconnection of one load
and the next, after the main CB has reclosed. The value is given as absolute
value (s) and can be set within the range: 10 s to 1800 s, in 1 s steps
10 s
NOTE: Load shedding activates if the monitoring conditions defined by the Frequency slope
and F W Warning parameters are present at the same time