product key technologies
Introduction
The GPRS Metering Block is a cellular-connected wiring hub engineered for remote meter reading and Internet of Things (IoT) power monitoring. It embeds an industrial-grade GPRS/4G communication unit that pushes real-time data to the cloud and accepts remote commands, all without relying on fixed-line network infrastructure. The block enables intelligent, wireless, and dependable connections for energy meters in locations such as rural transformer districts, overseas Advanced Metering Infrastructure (AMI) rollouts, large industrial consumer monitoring sites, and photovoltaic plant data collection points. By automating data retrieval at minute-level intervals and supporting remote load switching, it slashes manual reading costs, boosts operational visibility, and facilitates demand-side management.
Core Capabilities
- Integrated cellular connectivity – Houses a multi-mode 2G/3G/4G module that functions anywhere cellular coverage exists, eliminating the need for wired broadband.
- Flexible, near real-time reporting – Upload intervals are user-configurable, reaching down to 15 minutes, with a field-verified data delivery rate exceeding 99%.
- Remote switching control – Accepts trip and close commands for load shedding, prepaid disconnection, and reconnection, enabling true remote management.
- Outage-resilient data handling – Automatically buffers readings locally for up to 30 days when the network drops, then forwards them once connectivity returns.
- Exceptional electrical performance – Ultra-low initial contact resistance of ≤0.35 mΩ limits thermal rise and prevents meter burnout; dielectric strength of ≥2.5 kV assures insulation integrity under voltage stress.
- Live meter exchange – An integrated bypass circuit supports hot-swap replacement without interrupting supply.
- Weatherized enclosure – Rated IP65 for complete dust ingress protection and resistance to low-pressure water jets, making it suitable for exposed outdoor sites.
- Broad protocol compatibility – Natively speaks DL/T645, Modbus RTU, and IEC 60870-5-104 for seamless integration into existing SCADA, billing, and energy management platforms.
- Extreme climate tolerance – Operates reliably from -40°C to +85°C, with a standby power draw under 0.5 W and a peak below 2 W.
Technical Specifications
| Communication module | Integrated GPRS/4G with automatic fallback to 3G/2G |
| Network support | GSM, GPRS, EDGE, UMTS, LTE; frequency bands regionally configurable |
| Antenna connection | SMA female port, external antenna provided |
| SIM interface | Standard format, customer-provided or factory pre-installed |
| Data upload | Configurable period, minimum 15 minutes; typical success rate ≥99% |
| Local storage | Retains 30 days of readings during network outages |
| Remote control | Supports trip/close for load management and prepaid applications |
| System compatibility | Single phase, three-phase three-wire, three-phase four-wire |
| Rated insulation voltage | 400 V / 690 V AC |
| Rated current | 10 A – 120 A (customizable) |
| Short-time withstand current | 5 kA / 1 s |
| Initial contact resistance | ≤0.35 mΩ |
| Dielectric strength | ≥2.5 kV / 1 min |
| Protection rating | IP65 (standard) |
| Operating temperature | -40 °C to +85 °C |
| Power consumption | Standby <0.5 W, peak <2 W |
| Compliance | IEC 60999-1, GB/T 14048.7, CE, FCC, RoHS |
Where It Works Best
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CCC & CE Certified Safe Electrical Supply
Demonstrating our commitment to global product safety and market accessibility, our comprehensive range of terminal blocks and junction boxes has successfully passed stringent testing to achieve official CCC and CE certifications. These safety marks verify that our low-voltage electrical components meet the legal health, safety, and environmental protection standards required in China and the European Economic Area. Our certified products have undergone rigorous laboratory evaluations, including glow-wire flammability tests, dielectric withstand voltage tests, and insulation resistance checks conducted by authoritative third-party electrical testing laboratories. Overseas B2B distributors, e-commerce wholesalers, and electrical retailers can confidently import and distribute our certified products, knowing they satisfy local regulatory requirements and provide end-users with maximum operational safety.
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