Installation Manual for 3-Phase Sensor without Current Transformer at the Grid Connection Point

1. Information on these instructions

Personnel must have carefully read and understood these installation and service instructions before starting any work.

1.1. Manufacturer

FENECON GmbH
Gewerbepark 6
94547 Iggensbach
Germany

Phone: +49 (0) 9903 6280 0
Fax: +49 (0) 9903 6280 909
E-mail: service@fenecon.de
Internet: www.fenecon.de

1.2. Formal information on installation and service instructions

Reprinting, even in part, is only permitted with the permission of FENECON GmbH.

1.3. Symbol conventions

Table 1. Symbol conventions

This symbol indicates an imminent danger. If this danger is not avoided, it can lead to death or serious injury.

This symbol indicates a potentially dangerous situation. If this dangerous situation is not avoided, it may result in minor or moderate injury.

This symbol indicates a warning. Failure to observe this warning may result in damage and/or destruction of the system.

This symbol indicates a note. It is recommended that the note be observed.

1.4. Structure of warning notices

Warning notices protect against possible personal injury and damage to property if observed and classify the magnitude of the danger by means of the signal word.

Source of the danger
Possible consequences of non-compliance

Measures for avoidance/prohibitions

Danger sign
The danger sign indicates warnings that warn of personal injury.

Source of danger
The source of danger indicates the cause of the hazard.

Possible consequences of non-compliance
The possible consequences of ignoring the warning are e. g. crushing, burns or other serious injuries.

Measures/prohibitions
Measures/prohibitions include actions that must be taken to avoid a hazard (e. g. stop the drive) or that are prohibited to avoid a hazard.

1.5. Terms and abbreviations

The following terms and abbreviations are used in the installation and service instructions:

Table 2. Terms and abbreviations
Term/abbreviation	Meaning
AC	Alternating Current
CHP	Combined heat and power plant (CHP)
BMS	Battery Management System
DC	Direct Current
EMS	Energy Management System
Energy meter	Electricity meter for the inverter at the grid connection point
FEMS	FENECON Energy Management System
Commissioning	Commissioning
MPPT	Maximum Power Point Tracking Finder for the maximum power point
GCP	grid connection point
PE	Protective conductor
PV	Photovoltaics
RTE	Round-Trip-Efficiency (RTE) System efficiency — ratio of discharged to charged energy quantity
SG-Ready	Smart-Grid-Ready — Preparation of the heat pump for external control
SoC	State of Charge State of charge The available capacity in a battery, expressed as a percentage of the nominal capacity.
SoH	State of Health — State of ageing
VDE	German Association for Electrical, Electronic & Information Technologies e. V.
Widget	Component of Online Monitoring

1.6. Version/revision

Table 3. Version/revision
Version/Revision	Change	Date	Name
2023.02.1	First draft	21/02/2024	FENECON TK
2025.04.1	Published on docs.fenecon.de	16/04/2025	FENECON PM

1.7. Symbol conventions

Table 4. Symbol conventions

This symbol indicates an imminent danger. If this danger is not avoided, it can lead to death or serious injury.

This symbol indicates a potentially dangerous situation. If this dangerous situation is not avoided, it may result in minor or moderate injury.

This symbol indicates a warning. Failure to observe this warning may result in damage and/or destruction of the system.

This symbol indicates a note. It is recommended that the note be observed.

1.8. Structure of warning notices

Warning notices protect against possible personal injury and damage to property if observed and classify the magnitude of the danger by means of the signal word.

Source of the danger
Possible consequences of non-compliance

Measures for avoidance/prohibitions

Danger sign
The danger sign indicates warnings that warn of personal injury.

Source of danger
The source of danger indicates the cause of the hazard.

Possible consequences of non-compliance
The possible consequences of ignoring the warning are e. g. crushing, burns or other serious injuries.

Measures/prohibitions
Measures/prohibitions include actions that must be taken to avoid a hazard (e. g. stop the drive) or that are prohibited to avoid a hazard.

1.9. Terms and abbreviations

The following terms and abbreviations are used in the installation and service instructions:

Table 5. Terms and abbreviations
Term/abbreviation	Meaning
AC	Alternating Current
CHP	Combined heat and power plant (CHP)
BMS	Battery Management System
DC	Direct Current
EMS	Energy Management System
Energy meter	Electricity meter for the inverter at the grid connection point
FEMS	FENECON Energy Management System
Commissioning	Commissioning
MPPT	Maximum Power Point Tracking Finder for the maximum power point
GCP	grid connection point
PE	Protective conductor
PV	Photovoltaics
RTE	Round-Trip-Efficiency (RTE) System efficiency — ratio of discharged to charged energy quantity
SG-Ready	Smart-Grid-Ready — Preparation of the heat pump for external control
SoC	State of Charge State of charge The available capacity in a battery, expressed as a percentage of the nominal capacity.
SoH	State of Health — State of ageing
VDE	German Association for Electrical, Electronic & Information Technologies e. V.
Widget	Component of Online Monitoring

2. Safety

2.1. Intended use

The Home 3-phase sensor without current transformer at the grid connection point is intended as an alternative to the normal meter supplied with the FENECON Home 20 & 30 inverter. For example, if the maximum current of 120 A or the diameter of the permanently connected transformers is not sufficient.

Any other use of the Home 3-phase sensor is not permitted.

2.2. Qualification of staff

The Home 3-phase sensor may only be installed by qualified personnel.

2.2.1. Qualified electricians

Qualified electricians include persons who

are able to carry out work on electrical systems due to their technical training, knowledge and experience, as well as knowledge of the relevant standards and regulations.
have been commissioned and trained by the operator to carry out work on electrical systems and equipment of the battery system.
are familiar with how the battery system works.
recognize hazards and prevent them by taking appropriate protective measures.

2.2.2. Service staff

Service personnel includes the manufacturer’s personnel or specialist personnel instructed and authorized by FENECON GmbH, who must be requested by the operator to work on the system (e. g. assembly, repair, maintenance, work on the batteries, etc.).

3. Technical data

Table 6. Technical data
Input	Grid	three-phase
	Nominal voltage — phase to neutral (stem: [V_(AC)])	220/230
	Rated voltage — phase to phase (\$V_(AC)\$)	380/400
	Voltage range (\$U_(n)\$)	0,88-1,1
	Rated AC mains frequency (Hz)	50/60
	Current \| Current transformer ratio	200 A — 5000 A / 5 A
Communication		RS485
Communication range (m)		100
User interface		4 LEDs, reset button
Accuracy	voltage/current	class 0.5
	Active energy	class 0.5
	Reactive energy	class 1
Power consumption (W)		< 5
Mechanical	Dimensions (W \| H \| D) (mm)	72 \| 85 \| 72
	Weight (g)	200
	Mounting type	DIN rail
Environment	Protection specification	IP20
	Operating temperature range (°C)	-25 ~ + 66
	Storage temperature range (°C)	-30 ~ +70
	Relative humidity (%, non-condensing)	0 ~ 95
	Max. Operating altitude (m)	3000

Image 1. Dimensions — 3-phase sensor

4. General description

The Home 3-phase sensor without current transformer at the grid connection point is not a standard scope of delivery for the FENECON Home 20 & 30 and is therefore not included in the delivery.

The 3-phase sensor can be purchased additionally if the FENECON Energy Meter HIM-120-C does not fit, as:

The maximum current of 120 A is not sufficient.
The maximum diameter of 16 mm of the split-core CTs is too small.

No current transformers are included with the Home 3-phase sensor without current transformers at the grid connection point. Any current transformers with a CT ratio of 200 A — 5000 A can be used. The secondary current must be 5 A.

Image 2. System — Schematic diagram with optional components (shown without protective device)

5. Assembly preparation

5.1. Scope of delivery

Table 7. Scope of delivery — 3-phase sensor without current transformer at grid connection point
Image	Amount	Description
	1	3-phase sensor without current transformer at grid connection point
	1	Communication cable with RJ45 socket
	1	Plug for communication connection to the inverter
	1	Plug for connecting the current transformer
	1	Plug for voltage tap

5.2. Connection overview

Image 3. AC connection

Table 8. Components for AC connection
List item	Description
1	Bi-directional meter (energy supplier)
2	Inverter fuse protection C40/C63, 3-pole¹
3	Fuse protection of the consumer loads (no emergency power) with RCD type A and suitable MCBs
4	Consumer loads (not supplied with emergency power)
5	Transformer — primary current: 200-5000 A; secondary current: 5 A (not included) (directly behind grid operator meter)
6	Extension with Home 3-phase sensor without current transformer at grid connection point
7	Fuse protection of the energy meter (recommended) B6, 3-pole

¹In addition, the currently valid national regulations and the specifications of the associated grid operator must be complied with.

5.3. Selection of suitable current transformers

The 3-phase sensor is compatible with all manufacturers of current transformers. However, observe the required parameters:

Primary current (\$I_(pr)\$):

200 A — 5000 A

Secondary current (\$I_(sr)\$):

5 A

Accuracy class:

0.5 (or better)

The dimensions of the transformers and the hole diameter for cables or copper busbars can be freely selected.

For example, we recommend the Socomec 192T2020 current transformer. This is a transformer with a primary current of 200 A and a hole diameter of 21 mm.

Selecting the correct primary rated current is very important for measurement accuracy. A rated current that is equal to or slightly greater than the fuse protection at the grid connection point is recommended.

To avoid measurement inaccuracies, the hole diameter of the measuring transformer should be selected to match the cable cross-section or the copper busbar.

5.4. Electrical installation

Connect the supplied communication cable with RJ45 socket to the communication plug as shown in the picture.
Connect the red core to A and the blue core to B.

Pre-fuse the three phases of the voltage tap with a fuse (6 A), e.g. a B6A automatic circuit breaker.

Connect the three phases and the neutral conductor to the terminal for the voltage tap as shown in the picture.
Suitable wire ferrules must be used for finely stranded cores.

image::other/zz/home/h2030_3-phase-sensor/electrical_installation_step6.jpg[pdfwidth=90%, width=200, align="center", Connection diagram]
image::other/zz/home/h2030_3-phase-sensor/electrical_installation_step7.jpg[pdfwidth=90%, width=200, align="center", Pinout -- Connector -- Transformer]

Connect the current transformers with a CT ratio of 200 — 5000 A / 5A as shown in the picture.
Connection point S1 on the transformer is for positive (+) and S2 for negative (-).

The P1 side of the current transformer must face the house.
The P2 side must face the grid.

After connecting all cores in the terminals, they can be connected to the meter.
Ensure that all plugs are fully inserted.

5.5. Configuration via commissioning wizard

As described in the assembly and service instructions for FENECON Home 20 & 30, the complete system must be switched on.

https://portal.fenecon.de

In the following commissioning step, the selection of the energy flow direction meter, the 3-phase sensor without current transformer must be selected:

Select the energy flow direction meter ("EnFluRi") here:
- Explicitly for Home 20 & 30: The standard scope of delivery or the optionally available, FENECON-meter for larger currents is selected here

Then enter the current value of the primary coil (e. g. 200 A for a current transformer with 200 A / 5 A).
CONFIRM and carry out the rest of the configuration.

6. Troubleshooting

6.1. Errors in Online Monitoring

The system status can be checked after logging in at the top right using the color of the icon. A green tick indicates that everything is OK, an orange exclamation mark indicates a warning (Warning) and a red exclamation mark indicates an error (Fault).

6.1.1. Fault display

System status: Everything is OK

System status: Warning

System status: Error (Fault)

6.2. 3-phase sensor status display

Type	Status	Description
	Glowing light	Switched on, no RS485 communication.
Flashing light	Switched on, RS485 communication is working correctly.
Off	Switched off
	Flashes	The Home 3-phase sensor can be reset by pressing the reset button for more than 5 seconds.
Off	-
	Lights	Grid withdrawal
Flashes	Mains supply
Off	No reference/grid feed-in

Type

Status

Description

Glowing light

Switched on, no RS485 communication.

Flashing light

Switched on, RS485 communication is working correctly.

Off

Switched off

Flashes

The Home 3-phase sensor can be reset by pressing the reset button for more than 5 seconds.

Off

Lights

Grid withdrawal

Flashes

Mains supply

Off

No reference/grid feed-in

7. Service

If the system malfunctions, contact FENECON Service:

Phone: +49 (0) 9903 6280-0 E-mail: service@fenecon.de

Our service times:

Monday to Thursday:

08:00 a.m. to 12:00 p.m. | 1:00 p.m. to 5:00 p.m.

Friday:

08:00 a.m. to 12:00 p.m. | 1:00 p.m. to 3:00 p.m.