Description
3WIRE TP4CH
TP4CH 3 Phase 4 Wire Smart Meter
The 3WIRE TP4CH is a 3-phase 4-wire smart energy meter designed to measure four different three-phase loads from one compact DIN rail meter. It is a practical 4-in-1 metering solution for three-phase feeder monitoring, distribution board metering, tenant metering, equipment metering and retrofit energy monitoring.
The TP4CH is supplied with 100A or 400A split-core clip-on CTs, with three CTs per channel. It supports Modbus RTU through RS485, infrared reading, active / reactive pulse output, event alarms, data freeze records and per-channel electrical measurements including voltage, current, frequency, power factor, active power, reactive power, apparent power and energy.
Meter Type
3-phase 4-wire, 4-channel smart energy meter
CT Supplied
100A or 400A split-core CTs, 3 CTs per channel
Communication
RS485 Modbus RTU and infrared port
Installation
Standard 35 mm DIN rail mounting
Product Description
The TP4CH is designed to reduce the cost and space required for multi-feeder three-phase metering. Instead of installing four separate three-phase meters, one TP4CH can monitor four individual three-phase loads using independent metering channels and split-core CTs.
Each channel has an independent high-precision energy metering chip to improve metering reliability. The meter supports 4-quadrant energy measurement, allowing each channel to measure import energy, export energy and net energy calculation.
Best use case: TP4CH is suitable for compact retrofit metering where up to four three-phase feeders need to be monitored from one RS485 Modbus meter.
Key Features
4-in-1 Three-Phase Meter
Measures four different three-phase loads from one compact DIN rail smart meter.
Independent Metering Chips
Each of the four channels has an independent high-precision energy metering chip.
100A or 400A Split-Core CTs
Supplied with 100A or 400A split-core clip-on CTs, with three CTs for each monitored three-phase channel.
4-Quadrant Energy
Each channel can measure import energy, export energy and net energy calculation.
Per-Channel Electrical Values
Measures voltage, current, frequency, power factor, kW, kVAr, kVA and energy by channel.
RS485 Modbus RTU
Provides RS485 communication for Modbus RTU integration with gateways, SCADA, EMS or IoTWatt 4.0.
Infrared Communication
Meter data can also be read through the IR port using a handheld reading unit.
Alarm and Event Monitoring
Records and alarms events such as undervoltage, overvoltage, voltage spike, phase loss and related abnormal events.
Data Freeze Records
Supports timed, hourly and daily freeze records for energy and related values.
Typical TP4CH System Architecture
TP4CH can be installed in a three-phase distribution board or metering panel to monitor up to four 3-phase 4-wire feeders. Data is collected through RS485 Modbus RTU and connected to a gateway, BMS, EMS, SCADA or IoTWatt 4.0 platform for dashboards, tenant metering, energy reports and circuit-level analysis.
1
4 Three-Phase Loads
2
3 CTs Per Channel
3
TP4CH Meter
4
RS485 Modbus RTU
5
IoTWatt 4.0 / EMS
Measurement Functions
The TP4CH provides telemetry measurements for four three-phase load channels, enabling feeder-level visibility of electrical and energy values.
| Function |
Measured Channels |
Description |
| Voltage |
L1 to L4 |
Voltage measurement for each monitored three-phase load channel. |
| Current |
L1 to L4 |
Current measurement using split-core CTs for each three-phase feeder. |
| Active Power |
L1 to L4 |
Active power measurement for each three-phase load. |
| Reactive Power |
L1 to L4 |
Reactive power measurement for each channel. |
| Apparent Power |
L1 to L4 |
Apparent power measurement for each channel. |
| Power Factor and Frequency |
L1 to L4 |
Power factor and frequency monitoring for each connected load channel. |
| Energy |
L1 to L4 |
Active and reactive energy measurement for each channel, suitable for feeder-level energy accounting. |
Data Freeze and Billing Support
The TP4CH supports reading closing date setup, enabling automatic monthly bill settlement. It also supports timed, hourly and daily freeze functions for periodic energy records.
| Freeze Function |
Capacity |
Typical Use |
| Timed Data Freeze |
30 timed freeze records |
Used for scheduled recording of energy and related values. |
| Hourly Data Freeze |
254 hourly freeze records |
Used for hourly energy review and load profile reference. |
| Daily Data Freeze |
62 daily freeze records |
Used for daily consumption review and monthly settlement support. |
| Reading Closing Date |
Configurable |
Used to support monthly automatic bill settlement by channel. |
Technical Specification
| Item |
Specification |
| Product Name |
TP4CH 3 Phase 4 Wire Smart Meter. |
| Metering Channels |
4 three-phase load channels. |
| Current Rating |
3 × 10(100)A or 3 × 10(400)A, depending on CT selection. |
| CT Supply |
100A or 400A split-core clip-on CTs, 3 CTs per channel. |
| Working Voltage |
DC 40V to 273V, AC 40V to 288V. |
| Specified Operating Voltage |
0.3Un to 1.1Un. |
| Extended Operating Voltage |
0.15Un to 1.15Un. |
| Working Voltage Limit |
0.0Un to 1.15Un. |
| Frequency |
50Hz. |
| Accuracy Class |
Active: 0.5S / 1. Reactive: 1 / 2. |
| Standards |
IEC 62053-21 for active energy and IEC 62053-23 for reactive energy. |
| Clock Accuracy |
≤ 0.5s/day at 23°C; variation with temperature change < 0.1s/day. |
| Voltage Circuit Power Consumption |
≤ 1.5W, 6VA per phase under nominal condition. |
| Current Circuit Power Consumption |
≤ 0.2VA for basic current < 10A; ≤ 0.4VA for basic current ≥ 10A. |
| Communication |
RS485 Modbus RTU and infrared communication. |
| Pulse Constant |
400 imp/kWh and 400 imp/kvarh. |
| I/O |
Digital output, digital input, RS485 and pulse port as shown in the wiring diagram. |
| Display |
LCD digital display with loop display of parameters for each channel. |
| Installation |
Standard 35 mm DIN rail installation. |
| Dimensions |
158 mm × 87 mm × 58 mm. |
| Weight |
350g. |
| Reference Test Condition |
23°C ± 2°C and RH 40% to 60%. |
Power Consumption
| Basic Current |
< 10A |
≥ 10A |
| Voltage Circuit of Each Phase |
≤ 1.5W, 6VA |
≤ 1.5W, 6VA |
| Current Circuit of Each Phase |
≤ 0.2VA |
≤ 0.4VA |
Connection Diagram and Dimensions
The TP4CH supports four three-phase CT channel groups, AC voltage input, DC / AC power input, digital output, digital inputs, RS485 and pulse output port. The compact body is suitable for DIN rail installation inside distribution boards and metering panels.
TP4CH Connection Diagram and Dimension
Typical Applications
Three-Phase Feeder Metering
Monitor up to four three-phase feeders from one compact DIN rail meter.
Tenant and Floor Metering
Measure multiple three-phase tenant, shoplot, floor or department loads.
MCC and DB Monitoring
Track multiple outgoing three-phase feeders in MCCs, DBs and sub-distribution panels.
Retrofit Energy Monitoring
Split-core CTs make it easier to add monitoring to existing panels with reduced shutdown and rewiring work.
Multi-Load Energy Audit
Collect feeder-level consumption data to identify major users and abnormal load behaviour.
IoTWatt 4.0 Integration
Use 4-channel three-phase data for dashboards, load comparison, sub-metering and digital energy audit workflows.
Integration with IoTWatt 4.0
When connected to IoTWatt 4.0, TP4CH provides compact three-phase feeder data for dashboards, cost allocation, sub-metering, feeder analytics, energy audit evidence, abnormal consumption detection and EECA reporting support.
- Monitor up to four three-phase 4-wire feeders from one compact meter.
- Compare kWh, kW, current, power factor and energy use between feeders.
- Use import, export and net energy values for each channel.
- Use freeze records for periodic energy review and settlement support.
- Use alarms to detect undervoltage, overvoltage, voltage spike, phase loss and related events.
- Connect through RS485 Modbus RTU using a gateway such as RS2LAN, RS2MQTT or RS2WLAN.
Integration note: TP4CH is suitable for IoTWatt 4.0 projects where multiple three-phase feeders must be monitored economically from one DIN rail device.
Recommended Deployment Checklist
- Confirm the number of three-phase loads to be monitored, up to four channels.
- Confirm CT selection: 100A or 400A split-core CTs.
- Confirm that three CTs per channel can be installed safely in the panel.
- Confirm conductor size and CT installation clearance.
- Confirm AC voltage input, working voltage and power supply connection.
- Confirm RS485 Modbus address, baud rate, parity, cable type, shielding and termination.
- Confirm if IR handheld reading is required.
- Confirm digital input, digital output and active / reactive pulse output requirements.
- Confirm freeze data and monthly closing date configuration.
- Confirm integration with BMS, EMS, SCADA, gateway or IoTWatt 4.0.
- Test phase sequence, channel mapping, CT direction, displayed values, Modbus register reading, alarms and pulse output during commissioning.
TP4CH Supply, Commissioning and IoTWatt 4.0 Integration
Saturn Pyro supports 3WIRE TP4CH 3 Phase 4 Wire Smart Meters for compact three-phase sub-metering, feeder monitoring, distribution board metering, 100A / 400A split-core CT installation, RS485 Modbus integration, EMS / BMS / SCADA connectivity and IoTWatt 4.0 digital energy audit projects in Malaysia.
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