Sigenergy Sigen Power Sensor | Three Phase External CT 300A | DIN Rail | RS485 | Solar Import/Export Monitoring
Sigenergy Sigen Power Sensor | Three Phase External CT 300A | DIN Rail | RS485 | Solar Import/Export Monitoring
Three Phase 3 × 300A CT Included ±1% Accuracy Commercial / Light Industrial Part No: SIG-SENSOR-TP-CT300-DH
The Sigenergy Power Sensor TP-CT300-DH is a three-phase energy metering device for larger commercial and light industrial sites where the incoming supply exceeds the 120A rating of the standard TP-CT-DH variant. Three external split-core current transformers rated to 300A per phase are included in the box, enabling accurate real-time monitoring of three-phase grid import and export at supply ratings up to 300A. It connects via RS485 Modbus RTU to Sigenergy inverters, energy controllers and the SigenStor EMS — providing the grid visibility needed for dynamic load management, export limitation, self-consumption optimisation and the full suite of Sigenergy intelligent energy management features.
What the Power Sensor Enables
Installed at the grid connection point, the Power Sensor feeds live three-phase import/export data to the Energy Controller every 100ms — enabling the full range of SigenStor intelligent energy management functions at commercial scale:
- Dynamic load management — real-time inverter throttling to prevent incomer overload
- Export limitation — caps grid export per DNO requirements or G99 compliance conditions
- Import limitation — prevents grid draw exceeding a contracted maximum demand
- Self-consumption optimisation — battery charges/discharges to reduce import across all phases
- AI tariff scheduling — real consumption data feeds the mySigen AI energy optimiser
- Accurate mySigen app energy flow display — grid, solar, battery and site consumption
- Anti-backflow and demand management with the Sigen Energy Gateway
- Solar surplus EV charging modes — with Sigen EV AC Charger where fitted
💡 Commercial-scale metering: The 300A CT rating makes this variant suited to three-phase commercial premises with supplies from around 125A up to 300A per phase — typically commercial units, small industrial sites, or multi-occupancy residential developments. For domestic three-phase supplies up to 120A, the more compact SIG-SENSOR-TP-CT-DH is appropriate. For supplies above 300A, see SIG-SENSOR-TP-CT600-DH.
Key Features
Three Phase Sensor Variants — CT Rating Guide
| Part No | CT Rating | Phases | Typical Application |
|---|---|---|---|
| SIG-SENSOR-TP-CT-DH | 120A | 3P3W / 3P4W | Three-phase residential, small commercial — up to 120A per phase |
| SIG-SENSOR-TP-CT300-DH ★ (this product) | 300A | 3P3W / 3P4W | Commercial / light industrial — supplies from ~125A up to 300A per phase |
| SIG-SENSOR-TP-CT600-DH | 600A | 3P3W / 3P4W | Industrial / large commercial — supplies from ~300A up to 600A per phase |
Technical Specifications
| Specification | Detail |
|---|---|
| Product Identity | |
| Part No | SIG-SENSOR-TP-CT300-DH |
| Brand | Sigenergy |
| Power Supply & Grid Connection | |
| Grid connection type | 3P3W / 3P4W (three-phase three-wire / four-wire) |
| AC input voltage range | 173–480 Vac |
| Nominal AC frequency | 50 / 60 Hz |
| Measurement Accuracy | |
| Voltage accuracy | ±0.5% |
| Current accuracy | ±0.5% |
| Power accuracy | ±1% |
| Frequency accuracy | ±0.2% |
| Data refresh rate | 100ms |
| Communication | |
| Interface | RS485 |
| Baud rate | 9,600 bps |
| Protocol | Modbus RTU |
| General Data — Sensor Body | |
| Dimensions (W × H × D) | 72 × 94.5 × 65mm |
| Weight | 200g |
| Display | LCD (real-time voltage, current, power, frequency) |
| Installation method | DIN Rail 35mm |
| Ingress protection rating | IP51 |
| Operating temperature | -30°C to 60°C |
| Storage temperature | -40°C to 85°C |
| Relative humidity | 0–90% |
| CT Accessories (× 3 supplied) | |
| Number of CTs supplied | 3 (one per phase) |
| CT type | Split-core (clip-on, no disconnection required) |
| Max. operating current per CT | 300A |
| Standards | |
| Standard compliance | EN 61010-1:2010, EN 61010-2-030:2010 |
FAQs
How do I know if I need the 300A or 120A variant?
Check the rating of your DNO main fuse or incomer breaker on each phase. If the per-phase rating is 120A or below, the standard SIG-SENSOR-TP-CT-DH (120A CTs) is the appropriate choice and is more compact. If the per-phase rating is between 121A and 300A, this 300A variant is required. If the rating exceeds 300A, use the SIG-SENSOR-TP-CT600-DH. When in doubt, always select the higher CT rating — running a CT above its rated current will produce inaccurate readings.
Is this sensor compatible with the Sigenergy Gateway and residential Energy Controllers?
Yes — all Sigen Power Sensor variants use the same RS485 Modbus RTU interface and are compatible with the full Sigenergy product range including the Energy Controller (EC SP and EC TP series), Hybrid Inverters, PV Inverters, and the Energy Gateway HomePro. The CT rating selection is purely about matching the sensor to the site's supply current — it does not affect inverter compatibility.
Are the CT bore dimensions and cable length published for this variant?
Sigenergy's publicly available datasheet documents CT bore diameter and cable length for the 120A CT only (16mm bore, 1m cable). Bore diameter and cable specifications for the 300A CTs are not published in the standard datasheet. For detailed CT accessory dimensions for this variant, consult the Sigenergy technical documentation or your distributor prior to installation planning.
Original: $417.05
-65%$417.05
$145.97Sigenergy Sigen Power Sensor | Three Phase External CT 300A | DIN Rail | RS485 | Solar Import/Export Monitoring
Three Phase 3 × 300A CT Included ±1% Accuracy Commercial / Light Industrial Part No: SIG-SENSOR-TP-CT300-DH
The Sigenergy Power Sensor TP-CT300-DH is a three-phase energy metering device for larger commercial and light industrial sites where the incoming supply exceeds the 120A rating of the standard TP-CT-DH variant. Three external split-core current transformers rated to 300A per phase are included in the box, enabling accurate real-time monitoring of three-phase grid import and export at supply ratings up to 300A. It connects via RS485 Modbus RTU to Sigenergy inverters, energy controllers and the SigenStor EMS — providing the grid visibility needed for dynamic load management, export limitation, self-consumption optimisation and the full suite of Sigenergy intelligent energy management features.
What the Power Sensor Enables
Installed at the grid connection point, the Power Sensor feeds live three-phase import/export data to the Energy Controller every 100ms — enabling the full range of SigenStor intelligent energy management functions at commercial scale:
- Dynamic load management — real-time inverter throttling to prevent incomer overload
- Export limitation — caps grid export per DNO requirements or G99 compliance conditions
- Import limitation — prevents grid draw exceeding a contracted maximum demand
- Self-consumption optimisation — battery charges/discharges to reduce import across all phases
- AI tariff scheduling — real consumption data feeds the mySigen AI energy optimiser
- Accurate mySigen app energy flow display — grid, solar, battery and site consumption
- Anti-backflow and demand management with the Sigen Energy Gateway
- Solar surplus EV charging modes — with Sigen EV AC Charger where fitted
💡 Commercial-scale metering: The 300A CT rating makes this variant suited to three-phase commercial premises with supplies from around 125A up to 300A per phase — typically commercial units, small industrial sites, or multi-occupancy residential developments. For domestic three-phase supplies up to 120A, the more compact SIG-SENSOR-TP-CT-DH is appropriate. For supplies above 300A, see SIG-SENSOR-TP-CT600-DH.
Key Features
Three Phase Sensor Variants — CT Rating Guide
| Part No | CT Rating | Phases | Typical Application |
|---|---|---|---|
| SIG-SENSOR-TP-CT-DH | 120A | 3P3W / 3P4W | Three-phase residential, small commercial — up to 120A per phase |
| SIG-SENSOR-TP-CT300-DH ★ (this product) | 300A | 3P3W / 3P4W | Commercial / light industrial — supplies from ~125A up to 300A per phase |
| SIG-SENSOR-TP-CT600-DH | 600A | 3P3W / 3P4W | Industrial / large commercial — supplies from ~300A up to 600A per phase |
Technical Specifications
| Specification | Detail |
|---|---|
| Product Identity | |
| Part No | SIG-SENSOR-TP-CT300-DH |
| Brand | Sigenergy |
| Power Supply & Grid Connection | |
| Grid connection type | 3P3W / 3P4W (three-phase three-wire / four-wire) |
| AC input voltage range | 173–480 Vac |
| Nominal AC frequency | 50 / 60 Hz |
| Measurement Accuracy | |
| Voltage accuracy | ±0.5% |
| Current accuracy | ±0.5% |
| Power accuracy | ±1% |
| Frequency accuracy | ±0.2% |
| Data refresh rate | 100ms |
| Communication | |
| Interface | RS485 |
| Baud rate | 9,600 bps |
| Protocol | Modbus RTU |
| General Data — Sensor Body | |
| Dimensions (W × H × D) | 72 × 94.5 × 65mm |
| Weight | 200g |
| Display | LCD (real-time voltage, current, power, frequency) |
| Installation method | DIN Rail 35mm |
| Ingress protection rating | IP51 |
| Operating temperature | -30°C to 60°C |
| Storage temperature | -40°C to 85°C |
| Relative humidity | 0–90% |
| CT Accessories (× 3 supplied) | |
| Number of CTs supplied | 3 (one per phase) |
| CT type | Split-core (clip-on, no disconnection required) |
| Max. operating current per CT | 300A |
| Standards | |
| Standard compliance | EN 61010-1:2010, EN 61010-2-030:2010 |
FAQs
How do I know if I need the 300A or 120A variant?
Check the rating of your DNO main fuse or incomer breaker on each phase. If the per-phase rating is 120A or below, the standard SIG-SENSOR-TP-CT-DH (120A CTs) is the appropriate choice and is more compact. If the per-phase rating is between 121A and 300A, this 300A variant is required. If the rating exceeds 300A, use the SIG-SENSOR-TP-CT600-DH. When in doubt, always select the higher CT rating — running a CT above its rated current will produce inaccurate readings.
Is this sensor compatible with the Sigenergy Gateway and residential Energy Controllers?
Yes — all Sigen Power Sensor variants use the same RS485 Modbus RTU interface and are compatible with the full Sigenergy product range including the Energy Controller (EC SP and EC TP series), Hybrid Inverters, PV Inverters, and the Energy Gateway HomePro. The CT rating selection is purely about matching the sensor to the site's supply current — it does not affect inverter compatibility.
Are the CT bore dimensions and cable length published for this variant?
Sigenergy's publicly available datasheet documents CT bore diameter and cable length for the 120A CT only (16mm bore, 1m cable). Bore diameter and cable specifications for the 300A CTs are not published in the standard datasheet. For detailed CT accessory dimensions for this variant, consult the Sigenergy technical documentation or your distributor prior to installation planning.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Three Phase 3 × 300A CT Included ±1% Accuracy Commercial / Light Industrial Part No: SIG-SENSOR-TP-CT300-DH
The Sigenergy Power Sensor TP-CT300-DH is a three-phase energy metering device for larger commercial and light industrial sites where the incoming supply exceeds the 120A rating of the standard TP-CT-DH variant. Three external split-core current transformers rated to 300A per phase are included in the box, enabling accurate real-time monitoring of three-phase grid import and export at supply ratings up to 300A. It connects via RS485 Modbus RTU to Sigenergy inverters, energy controllers and the SigenStor EMS — providing the grid visibility needed for dynamic load management, export limitation, self-consumption optimisation and the full suite of Sigenergy intelligent energy management features.
What the Power Sensor Enables
Installed at the grid connection point, the Power Sensor feeds live three-phase import/export data to the Energy Controller every 100ms — enabling the full range of SigenStor intelligent energy management functions at commercial scale:
- Dynamic load management — real-time inverter throttling to prevent incomer overload
- Export limitation — caps grid export per DNO requirements or G99 compliance conditions
- Import limitation — prevents grid draw exceeding a contracted maximum demand
- Self-consumption optimisation — battery charges/discharges to reduce import across all phases
- AI tariff scheduling — real consumption data feeds the mySigen AI energy optimiser
- Accurate mySigen app energy flow display — grid, solar, battery and site consumption
- Anti-backflow and demand management with the Sigen Energy Gateway
- Solar surplus EV charging modes — with Sigen EV AC Charger where fitted
💡 Commercial-scale metering: The 300A CT rating makes this variant suited to three-phase commercial premises with supplies from around 125A up to 300A per phase — typically commercial units, small industrial sites, or multi-occupancy residential developments. For domestic three-phase supplies up to 120A, the more compact SIG-SENSOR-TP-CT-DH is appropriate. For supplies above 300A, see SIG-SENSOR-TP-CT600-DH.
Key Features
Three Phase Sensor Variants — CT Rating Guide
| Part No | CT Rating | Phases | Typical Application |
|---|---|---|---|
| SIG-SENSOR-TP-CT-DH | 120A | 3P3W / 3P4W | Three-phase residential, small commercial — up to 120A per phase |
| SIG-SENSOR-TP-CT300-DH ★ (this product) | 300A | 3P3W / 3P4W | Commercial / light industrial — supplies from ~125A up to 300A per phase |
| SIG-SENSOR-TP-CT600-DH | 600A | 3P3W / 3P4W | Industrial / large commercial — supplies from ~300A up to 600A per phase |
Technical Specifications
| Specification | Detail |
|---|---|
| Product Identity | |
| Part No | SIG-SENSOR-TP-CT300-DH |
| Brand | Sigenergy |
| Power Supply & Grid Connection | |
| Grid connection type | 3P3W / 3P4W (three-phase three-wire / four-wire) |
| AC input voltage range | 173–480 Vac |
| Nominal AC frequency | 50 / 60 Hz |
| Measurement Accuracy | |
| Voltage accuracy | ±0.5% |
| Current accuracy | ±0.5% |
| Power accuracy | ±1% |
| Frequency accuracy | ±0.2% |
| Data refresh rate | 100ms |
| Communication | |
| Interface | RS485 |
| Baud rate | 9,600 bps |
| Protocol | Modbus RTU |
| General Data — Sensor Body | |
| Dimensions (W × H × D) | 72 × 94.5 × 65mm |
| Weight | 200g |
| Display | LCD (real-time voltage, current, power, frequency) |
| Installation method | DIN Rail 35mm |
| Ingress protection rating | IP51 |
| Operating temperature | -30°C to 60°C |
| Storage temperature | -40°C to 85°C |
| Relative humidity | 0–90% |
| CT Accessories (× 3 supplied) | |
| Number of CTs supplied | 3 (one per phase) |
| CT type | Split-core (clip-on, no disconnection required) |
| Max. operating current per CT | 300A |
| Standards | |
| Standard compliance | EN 61010-1:2010, EN 61010-2-030:2010 |
FAQs
How do I know if I need the 300A or 120A variant?
Check the rating of your DNO main fuse or incomer breaker on each phase. If the per-phase rating is 120A or below, the standard SIG-SENSOR-TP-CT-DH (120A CTs) is the appropriate choice and is more compact. If the per-phase rating is between 121A and 300A, this 300A variant is required. If the rating exceeds 300A, use the SIG-SENSOR-TP-CT600-DH. When in doubt, always select the higher CT rating — running a CT above its rated current will produce inaccurate readings.
Is this sensor compatible with the Sigenergy Gateway and residential Energy Controllers?
Yes — all Sigen Power Sensor variants use the same RS485 Modbus RTU interface and are compatible with the full Sigenergy product range including the Energy Controller (EC SP and EC TP series), Hybrid Inverters, PV Inverters, and the Energy Gateway HomePro. The CT rating selection is purely about matching the sensor to the site's supply current — it does not affect inverter compatibility.
Are the CT bore dimensions and cable length published for this variant?
Sigenergy's publicly available datasheet documents CT bore diameter and cable length for the 120A CT only (16mm bore, 1m cable). Bore diameter and cable specifications for the 300A CTs are not published in the standard datasheet. For detailed CT accessory dimensions for this variant, consult the Sigenergy technical documentation or your distributor prior to installation planning.
