EM4301-CT
Three-phase, current-transformer connected
- CT secondary output
- 1 A / 5 A
- Connection
- External CTs
EM4301-CT / Energy Measurement
EM4301-CT — Three-phase CT electricity meter
Three-phase metering through external current transformers.
EM4301-CT measures a three-phase installation using external current transformers with a 1 A or 5 A secondary output. Match the transformers and their ratio to the current you need to measure.
YOBIIQ / EM4301-CT- Phases
- 3
- CT secondary output
- 1 A / 5 A
- Measurement method
- External CTs
- Wireless reporting
- LoRaWAN
About this product.
The EM4301-CT is a DIN-rail electricity meter that measures through external current transformers. The CTs provide a 1 A or 5 A secondary signal to the meter; the primary current range depends on the selected transformers and configured ratio.
This connection suits existing installations where suitable split-core CTs can reduce changes to the main wiring, as well as circuits requiring higher current measurement. The CT version requires an auxiliary 230 V supply. The installer selects the transformers, checks their orientation and configures the ratio.
EM4301-CT is at End of Sale and is being replaced by the DEM series. Compare the DEM4 CT configuration when planning a replacement.
CHOOSE YOUR MODEL01 / MODELS
The connection your project needs.
Compare the configurations and explore the specifications of each model.
IN YOUR ENVIRONMENTPRACTICAL USE CASES
Find the consumption worth investigating.
The useful question is not just how much energy a building uses, but where, when and what changed.
EXAMPLE APPLICATIONOffices & shared spaces
Offices & schoolsDiscuss a similar project
Add metering to an existing board
An electricity bill shows a total, but it does not tell a facilities team what remains active after everyone leaves.
WHERE YOBIIQ COMES IN
Use suitable split-core CTs to measure the selected circuits with fewer changes to existing main wiring. Configure the ratio and compare daytime and overnight consumption in the application.
A focused list of consumption patterns to investigate before deciding what to change.
EXAMPLE APPLICATIONPlant rooms & equipment
Property portfoliosDiscuss a similar project
Monitor higher-current supplies
The current at a main distribution board may exceed the limit of a direct-connected meter.
WHERE YOBIIQ COMES IN
Select current transformers for the required primary current and connect their secondary signals to the EM4301-CT. Configure the ratio and organise readings by site or measurement point.
A more useful conversation about which spaces need attention and why.
EXAMPLE APPLICATIONBuildings & portfolios
Energy & operations teamsDiscuss a similar project
Measure the effect of a change
A new operating schedule or equipment change needs more than a lower bill to show what happened.
WHERE YOBIIQ COMES IN
Record a baseline, apply the planned change and review the same measurement points afterwards. Account for differences in operating hours and occupancy when interpreting the result.
A traceable before-and-after record for the team’s energy decisions.
EXPLORE THE POSSIBILITIES02 / CONNECT THE DOTS
A closer look. A clearer picture.
Explore how this device fits into a connected environment.
EM4301-CT measures a three-phase installation using external current transformers with a 1 A or 5 A secondary output. Match the transformers and their ratio to the current you need to measure.
Your device communicates over LoRaWAN. A gateway forwards its messages to a network server, ready for your application to use.
Bring device information into a monitoring platform. Follow readings and events together, with a clearer picture of the environment you manage.
What the device does
- Measures through external current transformers.
- Uses a configured CT ratio for primary-current readings.
- Records imported and exported energy.
- Sends readings over LoRaWAN.
UNDERSTAND THE OPERATIONDEVICE + APPLICATION
See what happens.
Step by step.
External current transformers provide the measurement signal. The EM4301-CT converts it using the configured ratio and reports readings over LoRaWAN.
HARDWARE SELECTION Information / action
- Current transformersSpecified for the installation
- EM4301-CTConfigured transformer ratio
- LoRaWAN networkNetwork server + gateway
- Your applicationDecode, display & act
01 / IN PRACTICE
Current-transformer metering
External current transformers supply a 1 A or 5 A secondary signal. Configure the CT ratio so the EM4301-CT reports the primary current correctly. Suitable split-core CTs can make installation easier in an existing distribution board.
An existing main distribution board or a supply carrying more than 100 A.
FITS INTO YOUR WORLDNETWORKS & PLATFORMS
Your network.
Your way of working.
Connect the device to a LoRaWAN network, then bring its data into the application your team uses. Each layer has a different job.
01
Network servers
Connect devices and route their LoRaWAN messages.
02
Application platforms
Turn decoded data into dashboards, history and actions.
Use the EM4301 family payload decoder with the correct CT-meter configuration. Confirm units, phase mapping and reporting settings during integration.
Plan your integration THE APPLICATION LAYER
From meter readings to a working overview.
Compare consumption, review trends and investigate reported events. This published YOBI Cloud example shows how energy data can be organised; the available fields depend on the meter and integration.
Explore the platform example
DESIGNED WITH PURPOSE03 / THE DETAILS THAT MATTER
Small details. Real capability.
Three-phase measurement through external CTs
CT secondary output: 1 A or 5 A
Configurable transformer ratio
Bidirectional energy recording
DIN-rail mounting and local display
Wireless LoRaWAN reporting
THE TECHNICAL VIEWFUNCTIONS & INTEGRATION
The details behind the decision.
A practical overview to help you specify the right device and the system around it.
Product documentation| Model | EM4301-CT |
|---|---|
| Application | Three-phase energy metering |
| Connection | External current transformers |
| CT secondary output | 1 A / 5 A |
| Meter current-input range | 0.003–6 A |
| Primary current range | Determined by the selected CTs and configured ratio |
| Auxiliary supply | 230 V |
| Nominal voltage | 230 VAC (L–N) / 400 VAC (L–L) |
| Frequency | 45–65 Hz |
| Measurements | Voltage, current, power, power factor, frequency and energy |
|---|---|
| Communication | LoRaWAN |
| Mounting | DIN-rail |
| Logging interval | 5–60 min |
| Operating temperature | −25 to +55 °C |
SPECIFY IT FOR YOUR PROJECT
Check your configuration Record the CT primary rating, secondary output and configured ratio before selecting a replacement. Match the DEM4 CT configuration to the existing installation.
FROM SELECTION TO SITEPLAN YOUR INSTALLATION
A good deployment starts here.
Four things to settle before the first device goes into service.
- 01
Choose measurement points
Decide whether you need a building total, a circuit view or separate readings for individual spaces.
- 02
Match the electrical installation
Select the CT primary rating and 1 A or 5 A secondary output, confirm orientation and phase mapping, configure the ratio and provide the auxiliary supply.
- 03
Bring readings into the platform
Commission the LoRaWAN connection and verify units, timestamps and the selected reporting interval.
- 04
Record the baseline
Collect a representative period and label the measurement points before using the data to assess changes.
QUESTIONS, ANSWERED
Before you choose.
Practical answers about EM4301-CT — Three-phase CT electricity meter.
Ask us something elseDoes the full load current pass through the EM4301-CT?
No. External current transformers provide a secondary signal to the EM4301-CT. The selected transformers and configured ratio determine the primary current that can be measured.
Which current transformers are required?
Use current transformers with a 1 A or 5 A secondary output. Select the primary rating for the installation and configure the matching ratio in the meter.
Why choose CT measurement for an existing installation?
Suitable split-core CTs can reduce changes to the main wiring and usually make installation faster. CT measurement is also the appropriate choice above the direct model’s 100 A limit.
Does the CT version need its own supply?
Yes. The EM4301-CT requires an auxiliary 230 V supply, as specified in the EM4301 family datasheet.
Can I compare several buildings?
Yes. A connected application can group device readings by building, area or measurement point. Useful comparisons require consistent units, time periods and context such as opening hours or occupancy.
Can I still order an EM4301-CT?
EM4301-CT is at End of Sale and is being replaced by the DEM series. Compare the DEM4 CT configuration and contact us for replacement planning.
BUILT FOR REAL DEPLOYMENTS
Keep exploring the details.
Explore the connections.
All devicesEnergy Measurement
EM4301 — Three-phase direct electricity meter
Direct-connected three-phase metering, up to 100 A.
LET’S MAKE IT HAPPENYour next project.
Your next project.
Our next connection.
Tell us what you want to connect, monitor or control. We’ll help you find a starting point.
Talk to the team