Description
Archmeter PA310 Smart Power Meter
PA310 Clip-On CT Smart Power Meter
The PA310 is a compact clip-on CT smart power meter designed for electric power monitoring and load recording in single-phase and three-phase systems. It is suitable for low-voltage applications, retrofit monitoring, load investigation, demand review and long-term energy data recording.
With split-type CTs, bi-directional measurement, RS485 Modbus communication, kWh pulse output, real-time clock with battery backup and large load profile recording capacity, the PA310 is a practical and cost-effective solution for modern electricity monitoring projects.
Meter Type
Clip-on CT smart power meter
System Type
3-phase 3/4-wire, 110/220V, 50/60Hz
Recording
Up to 10,000 load profile records
Communication
RS485 Modbus, 9600 / 19200 baud
Product Description
The PA310 is designed for electrical power monitoring and load recording. It can be directly used in low-voltage systems due to its wide measurement range, with clip-on CT options up to 200A. It also maintains better than 1% accuracy under low current conditions, making it suitable for selected medium-voltage or high-voltage secondary metering applications when used with appropriate instrument transformers.
The PA310 is especially useful for load studies and energy investigations because it includes long-term load profile recording with configurable recording intervals. Its compact rail-mounted design, clip-on CTs and Modbus communication make it easy to install into existing electrical panels.
Best use case: PA310 is suitable for retrofit load investigation, feeder monitoring and long-term power recording where clip-on CT installation, Modbus communication and onboard load profile memory are required.
PA310 Product Image
PA310 Clip-On CT Smart Power Meter
Key Features
Clip-On CT Installation
Split-type CTs make wiring easier, especially for online retrofit installation in existing panels.
Wide Measurement Range
Supports base current 10A, Imax 60A, with optional CT 16 mm 100A and CT 24 mm 200A.
High kWh Accuracy
kWh accuracy better than 0.5% at PF = 1 and better than 1% at PF = 0.5.
Load Profile Recording
Stores up to 10,000 load profile records with configurable recording periods.
RS485 Modbus Communication
Supports RS485 communication with Modbus protocol for integration with gateways, SCADA, EMS and IoTWatt 4.0.
Bi-Directional Measurement
Supports bi-directional measurement for kW, kWh, kVAR and kvarh.
kWh Pulse Output
Provides kWh pulse output that can be connected to a standard meter tester or pulse input device.
RTC Battery Backup
Includes RTC with 950 mAh LiSOCl battery for maintaining time reference.
Rail-Mounted Design
Compact rail-mounted form factor for easy installation in panels and metering cabinets.
Technical Specification
| Item |
Specification |
| Type |
3-phase 3/4-wire, 110/220V, 50/60Hz. |
| Rating |
Base current Ib 10A, Imax 60A. Optional CT 16 mm 100A and CT 24 mm 200A. Datasheet also notes maximum to 400A and 1000A options. |
| kWh Accuracy |
PF = 1: < 0.5%; PF = 0.5: < 1%; better than IEC 62053-21. |
| Starting Current |
< 0.001 Ib. |
| Display |
Mono LCD. |
| Wiring |
Auto detection: 1P2W, 1P3W, 3P3W-2CT, 3P3W-3CT and 3P4W. |
| Communication Interface |
RS485 with Modbus protocol. Baud rate: 9600 or 19200. |
| Load Profile |
2 groups. Group 1 supports maximum 12 channels; group 2 supports maximum 8 channels. Programmable recording interval for each group. Maximum storage: 104 days at 15-minute interval per channel. |
| Battery |
LiSOCl , 950 mAh for RTC. |
| Measured Values |
VA-N, VB-N, VC-N, VL-Nave, VA-B, VB-C, VC-A, VL-Lave, IA, IB, IC, Iave, PFA, PFB, PFC, kWA, kWB, kWC, kWtot, kvarA, kvarB, kvarC, kvartot, kVAA, kVAB, kVAC, kVAtot, Wh+, Wh-, VArh+, VArh-, VAh and Hz. |
| Bi-Directional Measurement |
kW, kWh, kVAR and kvarh. |
| Surge Withstand |
EN 61000-4-5. |
| LVD Test |
EN 61010-1. |
| Size |
110 mm (L) 75 mm (W) 120 mm (H). |
| Operating Temperature |
0C to 50C. |
| Installation |
Rail-mounted. |
| Terminals |
2 10 terminals, IP25. |
Ordering Code
The PA310 ordering code is based on the selected CT size. The datasheet shows the PA310 ordering code format with CT size options as below.
| Ordering Code |
CT Size |
Application |
| PA310-10 |
CT 10 mm, standard |
Standard PA310 selection for smaller conductor and lower-current applications. |
| PA310-16 |
CT 16 mm, optional |
Optional CT selection for larger conductor or higher-current applications up to 100A. |
| PA310-24 |
CT 24 mm, optional |
Optional CT selection for larger conductor or higher-current applications up to 200A. |
Selection note: Confirm conductor size, maximum load current and CT window clearance before selecting PA310-10, PA310-16 or PA310-24.
Load Profile Recording
PA310 is suitable for load investigation because it supports onboard load profile storage. The recording interval can be configured, allowing users to review power behaviour over time without relying only on real-time display values.
| Recording Item |
PA310 Capability |
| Maximum Records |
Up to 10,000 load profile records. |
| Recording Groups |
2 groups: group 1 maximum 12 channels, group 2 maximum 8 channels. |
| Recording Interval |
Configurable recording period for each group. |
| Storage Duration |
Up to 104 days at 15-minute interval per channel, depending on selected channel count and group configuration. |
Typical Applications
Retrofit Load Investigation
Use clip-on CTs and load profile recording to study actual load behaviour in existing panels.
Low-Voltage Feeder Monitoring
Monitor three-phase feeders with voltage, current, power, power factor, energy and demand values.
Energy Audit Measurement
Use recorded load profiles to support energy audit findings and baseline development.
Temporary Monitoring
Suitable for short-term and medium-term measurement campaigns where non-invasive CT installation is preferred.
Bi-Directional Energy Monitoring
Measure import and export energy-related values for systems where energy flow direction matters.
SCADA / EMS / IoTWatt 4.0
Integrate PA310 through RS485 Modbus for live dashboards, data logging and reporting workflows.
Typical System Integration
PA310 can be installed on DIN rail inside an electrical panel, with split-type CTs installed around feeder conductors. Measurement data can be read locally from the LCD or collected through RS485 Modbus into a gateway, SCADA, EMS, BMS or IoTWatt 4.0 platform.
Integration with IoTWatt 4.0
When integrated with IoTWatt 4.0, PA310 becomes a practical data source for load profile analysis, feeder monitoring, digital energy audit, baseline development, abnormal load detection and energy performance tracking.
- Monitor voltage, current, kW, kVA, kvar, PF, kWh, kvarh, kVAh, Hz and demand.
- Use recorded load profiles for energy audit evidence and load behaviour analysis.
- Support temporary or permanent monitoring of feeders and equipment loads.
- Use bi-directional measurement for systems with import / export energy flow.
- Connect through RS485 Modbus using a gateway such as RS2LAN, RS2MQTT or RS2WLAN.
- Use IoTWatt 4.0 dashboards and reports to convert raw meter data into actionable energy insights.
Integration note: PA310 is especially suitable for IoTWatt 4.0 projects where retrofit-friendly CT installation and load profile recording are required for energy audit or load investigation.
Recommended Deployment Checklist
- Confirm system type: single-phase or three-phase, 3-wire or 4-wire.
- Confirm voltage level and whether direct voltage input is suitable.
- Confirm CT size selection: PA310-10, PA310-16 or PA310-24.
- Confirm maximum feeder current and conductor size.
- Confirm RS485 Modbus address, baud rate and communication wiring.
- Confirm required load profile recording interval and recording group configuration.
- Confirm kWh pulse output requirement, if used for meter testing or external pulse collection.
- Confirm RTC time setting and battery condition.
- Confirm rail mounting space and terminal access.
- Test CT direction, voltage phase mapping, LCD values, Modbus data and load profile recording during commissioning.
PA310 Meter Supply, Load Investigation and IoTWatt 4.0 Integration
Saturn Pyro supports Archmeter PA310 Clip-On CT Smart Power Meters for retrofit load monitoring, feeder monitoring, load profile recording, RS485 Modbus integration, energy audit measurement, SCADA / EMS / BMS connectivity and IoTWatt 4.0 digital energy audit projects in Malaysia.
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