Deskripsyon
3WIRE SP4CH
SP4CH Single Phase 4 Channels Smart Meter
The 3WIRE SP4CH is a single-phase 4-channel smart energy meter designed to measure four different loads from one compact DIN rail meter. It is a practical 4-in-1 metering solution for branch-circuit monitoring, tenant metering, small power circuits, lighting circuits, distribution boards and retrofit energy monitoring.
The SP4CH is supplied with 100A split-core clip-on CTs, supports Modbus RTU through RS485, provides infrared reading, active 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 active energy.
Meter Type
Single-phase 4-channel smart energy meter
CT Supplied
100A split-core clip-on CTs, 1 CT per channel
Communication
RS485 Modbus RTU and infrared port
Installation
Standard 35 mm DIN rail mounting
Product Description
The SP4CH is designed to reduce the cost and space required for multi-circuit single-phase metering. Instead of installing four separate single-phase meters, one SP4CH can monitor four individual 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: SP4CH is suitable for compact retrofit branch-circuit metering where four single-phase loads need to be monitored from one RS485 Modbus meter.
Key Features
4-in-1 Energy Meter
Measures four different single-phase loads from one compact smart meter.
Independent Metering Chips
Each of the four channels has an independent high-precision energy metering chip.
100A Split-Core CTs
Supplied with 100A split-core clip-on CTs, one CT for each of the four channels.
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 active 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 SP4CH System Architecture
SP4CH can be installed in a distribution board to monitor up to four single-phase circuits. 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 Single-Phase Loads
2
100A Split-Core CTs
3
SP4CH Meter
4
RS485 Modbus RTU
5
IoTWatt 4.0 / EMS
Measurement Functions
The SP4CH provides telemetry measurements for four load channels, enabling per-circuit visibility of electrical and energy values.
| Function |
Measured Channels |
Description |
| Voltage |
L1 to L4 |
Voltage measurement for each monitored load channel. |
| Current |
L1 to L4 |
Current measurement for each split-core CT channel. |
| Active Power |
L1 to L4 |
Active power measurement for each single-phase load. |
| Power Factor |
L1 to L4 |
Power factor measurement for each channel. |
| Frequency |
L1 to L4 |
Frequency value available for monitored channels. |
| Active Energy |
L1 to L4 |
Active energy measurement for each channel, suitable for branch-circuit energy accounting. |
Data Freeze and Billing Support
The SP4CH 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 |
SP4CH Single Phase Smart Meter. |
| Metering Channels |
4 single-phase load channels. |
| Current Rating |
10(100)A, supplied with 100A split-core clip-on CTs, 1 CT per channel. |
| Working Voltage |
DC 40V to 273V, AC 40V to 264V. |
| 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 SP4CH supports four CT channels, 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.
SP4CH Connection Diagram and Dimension
Typical Applications
Small Tenant Sub-Metering
Monitor up to four tenant, shoplot or unit circuits from one compact meter.
Distribution Board Monitoring
Measure outgoing single-phase feeders in DBs, floor panels and small metering panels.
Lighting and Small Power Circuits
Track lighting, socket, auxiliary and small power loads separately by circuit.
Retrofit Energy Monitoring
Split-core CTs make it easier to add monitoring to existing panels with reduced rewiring work.
Multi-Load Energy Audit
Collect circuit-level consumption data to identify major users and abnormal load behaviour.
IoTWatt 4.0 Integration
Use 4-channel data for dashboards, load comparison, sub-metering and digital energy audit workflows.
Integration with IoTWatt 4.0
When connected to IoTWatt 4.0, SP4CH provides compact single-phase circuit data for dashboards, cost allocation, sub-metering, branch-circuit analytics, energy audit evidence, abnormal consumption detection and EECA reporting support.
- Monitor up to four single-phase circuits from one compact meter.
- Compare kWh, kW, current, power factor and energy use between loads.
- 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: SP4CH is suitable for IoTWatt 4.0 projects where four single-phase circuits need to be monitored economically from one DIN rail device.
Recommended Deployment Checklist
- Confirm the number of single-phase loads to be monitored, up to four channels.
- Confirm that 100A split-core CTs are suitable for each circuit.
- Confirm conductor size and CT installation space inside the panel.
- 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 pulse output requirements.
- Confirm freeze data and monthly closing date configuration.
- Confirm integration with BMS, EMS, SCADA, gateway or IoTWatt 4.0.
- Test channel mapping, CT direction, displayed values, Modbus register reading, alarms and pulse output during commissioning.
SP4CH Supply, Commissioning and IoTWatt 4.0 Integration
Saturn Pyro supports 3WIRE SP4CH Single Phase 4 Channels Smart Meters for compact sub-metering, branch-circuit monitoring, distribution board metering, 100A 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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