LEGRAND 4 121 72 Instruction Manual

1/6
87045 LIMOGES Cedex - FRANCE
Telephone : [phone] - Fax : [phone]
Smart load shedder
Cat. number : 4 121 72 –1 991 20
Sommaire Pages
1. Description - Use.....................................1
2. Range.........................................................1
3. Overall dimensions..................................1
4. Preparation - Connection....................... 2
5. General characteristics...........................5
6. Compliance and approvals.....................6
1. DESCRIPTION - USE
Use:
. Allows the user to save money by decreasing his electrical
contract expenses while maintaining his comfort by avoiding power
supply shutdowns based on appliances priorities. Some of them
will never be powered off as considered as "high priority".
So, this module can measure the house total electricity
consumption via the included closed current transformer and to
display it on Home + Control smartphone app.
The load shedder is thus able to detect when the subscribed power
(or the maximum consumption threshold defined in the App) is
about to be exceeded and to intelligently turn off loads previously
connected to “with Netatmo” devices such as; Connected cable
outlets, Connected contactors, Connected power outlets... in
accordance with predefined priorities. These priorities can be
easily customized in the smartphone app.
Then, the smart load shedder will automatically turn back on these
loads after the drop of the consumption peak.
This connected version gets the following functions:
· Real-time measurement: automatically reads the total electrical
consumption of the home.
· History of electricity consumption, available in the Home +
Control app.
· Turn off/back on loads one by one for a very precise management
of the load shedding function.
· Set-up of the subscribed power / maximum consumption
threshold (which act as a load shedding threshold) and
customization of load shedding priorities between loads via the
Home + Control app.
Technology:
. Single-phase current measurement, by field effect using a
closed current transformer (delivered with the smart load
shedder) and data transmission by radio frequency to the
connected network.
2. RANGE
Width:
. 1 module. 17,7 mm wide.
Rated primary current:
. Ipn = 80A AC single phase
1. DESCRIPTION –USE (continued)
Power consumption:
. 0.3W Max
Rated voltage:
. 100V to 240V AC
Rated frequency:
. 50Hz / 60Hz
Configuration and use:
Can be used with:
- Legrand smartphone app
«HOME + CONTROL»
. Available for free on Google Play or App Store
3. OVERALL DIMENSIONS
Technical data sheet: F03109EN/06
Updated on: 06/01/2023
Created on: 22/01/2021
Only suitable for single-phase installation.
Requires beforehand installation of a “with
Netatmo” connected starter pack or a Control
module (gateway) and at least one product
from “with Netatmo” offer offering the
measurement plus command functions (e.g. :
connected socket, connected cable outlet,
connected contactor ...)

2/6
Smart load shedder
Cat. number : 4 121 72 –1 991 20
4. PREPARATION - CONNECTION
Mounting:
. On symmetrical rail EN / IEC 60715 or DIN 35.
Operating position:
. Vertical, Horizontal, Flat.
Row positioning:
. The product shape and the positioning of the terminals allow the
passage of single-line, three-lines and plug-in supply busbars in
the upper part of the product. Then, it is possible to freely choose
the position of the Smart load shedder in the row and to connect
by supply busbar the other devices put on the same DIN rail.
Module maintenance:
. It is possible to switch a Smart load shedder in the middle of a
row supplied with an upstream busbar without disconnecting the
other devices on the same DIN rail.
4. PREPARATION - CONNECTION (continued)
. The measuring coil of the smart load shedder must be
installed on the main power supply electrical line to get the
total consumption information.
. Wire the Smart load shedder after a circuit breaker C2 to C16
according to the cross section of the used cables.
. The measurement coil must simply be clipped at the upstream
terminal of the device (the word COIL has been printed near to
this terminal to easily spot it).
Recommended tools:
. For the terminals:
Screwdriver flat-blade 3.5 mm
. For clamping:
Screwdriver flat-blade (5,5 mm or less).
Connection:
. Power screw terminals:
- Terminal type: cage
- Depth: 9 mm
- Stripping length recommended: 8 mm
- Screw head: slotted 3.5 mm
- Type of screw: M3
- Tightening torque: 0.5 Nm
Conductor type:
. Copper cables
Without ferrule
With ferrule
Rigid cable
1x (1 to 2.5mm²)
2 x (1 to 1.5mm²)
-
Flexible cable
1x (1 to 2.5mm²)
2 x (1 to 1.5mm²)
1 x (1 to 1.5mm²)
Technical data sheet: F03109EN/06
Updated on: 06/01/2023
Created on: 22/01/2021
Connector :
Measure coil
1. Unclip the clamps
to put it in open
position
2. Pull the device
forward in order to
release it from the
DIN rail
3. Pull the device
downward in order to
completely release it
from the prongs of
the busbar
Connector: Power cabling
Line (V1) and Neutral (N)

3/6
Smart load shedder
Cat. number : 4 121 72 –1 991 20
4. PREPARATION - CONNECTION (continued)
Measure coil connection:
Insert the measure coil connector into the housing provided on
the Smart load shedder until it locks (clips).
NB: If necessary, to disconnect it, use a small screwdriver on the
clips.
Capacity of the measure coil:
Cable Cross
section
1.5mm²
2.5mm²
6mm²
10mm²
to
25mm²
Number of
flexible or
rigid cables
8
5
3
1
Wiring diagrams:
. Example of wiring diagram in an installation:
As a reminder, the load shedding function requires the installation
of a connected smart load shedder as well as at least one device
from the "with Netatmo" offer with the measurement plus
command functions, e.g. : connected power outlet, connected
cable outlet, connected contactor etc...
4. PREPARATION - CONNECTION (continued)
Real-time and historical data visualization:
. Via smartphone with the Home+Control app.
Operating algorithm of the smart load shedder:
. The maximum power subscribed to the energy supplier must be
fill in the smartphone app..
The instantaneous overconsumption threshold from which the
device goes into load shedding mode (automatically turn off a
power line) is set by default at 130%.
This value can be adjusted from 100% at least to 200% in steps of
10% in the smartphone app.
Minimum time before turn back ON a load:
. The smart load shedder checks every 10s the total instantaneous
consumption level to check if this level allows it to turn back on
the previously turn off loads.
Priority of loads to be shed:
The list of loads being allowed to be turned off and their priorities
must be configured in the smartphone app.
When the instantaneous total consumption goes over the
threshold, the load shedding operation takes place according to
the defined priorities for loads to be turned off until the total
consumption goes under this threshold.
: The load shedder does not turn off loads whom consumption
is under 50W. For obvious reasons, the “fridge” and “Wi-Fi box”
circuits cannot be turned off.
Technical data sheet: F03109EN/06
Updated on: 06/01/2023
Created on: 22/01/2021
Connected
Power Outlets
Measurement
coil
Connected
Contactor
Connected
Cable Outlets
Smart Load
Shedder

4/6
Smart load shedder
Cat. number : 4 121 72 –1 991 20
4. PREPARATION - CONNECTION (continued)
Visualization of the setup of the device:
. Via the LED on the front face
In configuration:
Color
Status
Signification
Red
Fixed
Temporary status. Device not
connected to the radio network
Green
Fixed
Temporary status. Device correctly
paired to the radio network (when
the radio network is still open)
OFF
Normal status. Device paired to the
radio network (when the radio
network is closed)
Operating :
Color
Status
Signification
OFF
No load shedding in progress
Red
Blinking
. Three phase installation: Check
whether the connected load
shedder is connected to the same
phase as the measuring coil.
. Any installation: Strong phase
shift between voltage and current
on the line caused by a load with
an unfavorable power factor
(Motor, swimming pool pump,
certain lighting, etc.)
Blue
Blinking
Effective load shedding (loads to
be shed are set to OFF in order of
priority until they are below the
power subscribed to the supplier)
Important information about the TOTAL measurement:
. Maximum 1 load shedder per installation.
. Several measuring coils can be put on the general power supply
electrical line (total consumption), eg the coil of the Connected
Ecometer or the one of the Connected Energy Meter.
. If the installation gets several connected devices which measure
the total consumption, then, this information will be displayed
only once a time in the smartphone app following a device priority
list:
The connected Ecometer,
The smart load shedder,
The connected energy meter.
4. PREPARATION - CONNECTION (continued)
Important information:
. Maximum 1 load shedder per installation.
. The connected load shedder does not support photovoltaics.
Add a Smart Load Shedder in a connected installation
(several steps):
. 1/ Beforehand, to create a connected installation you must
install:
Either a gateway module
Or a connected starter pack (drawing of principle, works with
anykind of “with Netatmo”connected starter pack).
Or any kind of « with Netatmo » gateway
. 2/ Beforehand, the general circuit breaker must be turned OFF.
Then after wiring step done, installation controlled, refit the front
plate so that no active live part is accessible. Then the general
circuit breaker can be powered back ON to simultaneously power
devices and allow them to be connected to the network.
. 3/ Finalize the installation in the Legrand Home + Control app
Download the Home + Control App and follow
the instructions for adding the connected product in your setup.
You also have the option of controlling your installation via a
voice assistant and can customize your scenarios via the Home +
Control App.
Technical data sheet: F03109EN/06
Updated on: 06/01/2023
Created on: 22/01/2021

5/6
Smart load shedder
Cat. number 4 121 72 –1 991 20
4. PREPARATION - CONNECTION (continued)
Smart load shedder resetting to remove it from a
connected installation
. Press and hold over 5 seconds on the setting button until the
LED on the setting button be fixed red. It is no longer paired with
the Gateway module / Gateway power outlet.
Other configurations & actions
. All other features and settings such as scenarios etc… are
directly explained step by step in the Home + Control app.
Labelling:
. Circuit identification thanks to a label inserted in the label holder
situated on the front face of the product.
5. GENERAL CHARACTERISTICS
Marking of the Smart Load Shedder:
Markings of the front side:
5. GENERAL CHARACTERISTICS (continued)
Characteristics of the measure coil:
Maxi measured primary current:
. 80A AC
Transformation ratio:
1000 :1
Rated short-time thermal current:
. Ith = 3kA rms /1s
Rated dynamic current:
. Idyn = 9kA
Rated insulation level:
. 3KV rms 50Hz/1min
Class of insulation:
Measure sensor Class A following EN/IEC 61869-2
Measurement Accuracy:
Module + coil measurement chain accuracy:
+/-1% for a measured current >2A and cosϕ≥0.8
Rated impulse withstand voltage (Uimp):
4kv
Overvoltage category:
. III
Degree of pollution:
. 2
Influence of altitude:
. No influence up to 2 000 m
Rated frequency :
. 50 / 60Hz
Rated voltage of use (Ue):
. Ue = 100 to 240 V ~
Recommandations :
. For the protection of the Smart load shedder, it is recommended
to use a circuit breaker C2 to C16 according to the cross section
of the used cables.
Characteristics of the radio interface:
. Standard IEEE 802.15.4
. Frequencies 2,4 à 2,4835Ghz
. Transmitter output power <100mW
Protection degree:
. Protection index of terminals against direct contacts: IP2X (wired
device).
. Protection index of the front face against direct contacts: IP3XD
. Class II, front panel with front plate.
. Class of protection against mechanical impacts IK04
Technical data sheet: F03109EN/06
Updated on: 06/01/2023
Created on: 22/01/2021
Icon, to easily identify
a connected device in
the electrical panel
board

6/6
Smart load shedder
Cat. number : 4 121 72 –1 991 20
5. GENERAL CHARACTERISTICS (continued)
Plastic material:
. Self-extinguishing polycarbonate.
. Classification UL 94: V0
Ambient operating temperature:
. Min. = + 5 °C Max. = + 45 °C.
Ambient storage temperature:
. Min. = - 40 °C Max. = + 70 °C.
Average weight:
. 91g
Volume when packed:
. 0,62 dm3.
6. COMPLIANCE AND APPROVALS
Compliance to standards:
EN/IEC 61010-1
Environment respect –Compliance with European Union Directives:
. Compliance with Directive 2002/95/EC of 27/01/03 known as "RoHS" which provides for a restriction on the use of dangerous
substances such as lead, mercury, cadmium, hexavalent chromium and polybrominated biphenyl (PBB) and polybrominated diphenyl
ether (PBDE) brominated flame retardants from 1st July 2006
. Compliance with the Directive 91/338/EEC of 18/06/91 and decree 94-647 of 27/07/04
. Compliant with regulation REACH
Plastic materials:
. Halogen-free plastics.
. Marking of parts according to ISO 11469 and ISO 1043.
. ISO 7000: 2004, Graphical symbols to be used on equipment - Index and synopsis
Packaging:
. Design and manufacture of packaging in accordance with Decree 98-638 of 20/07/98 and Directive 94/62 / EC.
Technical data sheet: F03109EN/06
Updated on: 06/01/2023
Created on: 22/01/2021