Three Phase STS Prepaid Energy Meter

In dynamic industrial environments, managing massive electrical loads requires absolute precision and unwavering security. Legy’s Three Phase STS Prepaid Energy Meter is engineered to be the central nervous system of your high-capacity infrastructure. Unlike cloud-dependent meters that fail during network outages, this powerhouse utilizes the globally recognized Standard Transfer Specification (STS) protocol. Facility operators can securely input a 20-digit encrypted token via the built-in keypad to instantly restore power or add credit, completely independent of real-time server communication. Designed explicitly for heavy-duty applications like steel mills, water treatment facilities, and commercial HVAC systems, it empowers facility managers to monitor peak demand, analyze phase imbalances, and prevent costly penalty fees. Whether upgrading a legacy substation or deploying a decentralized microgrid, our engineering team provides bespoke integration support to turn raw megawatt-hours into actionable financial intelligence.

Technical Blueprint & Core Specifications

Product Feature And Application

Application

The Three Phase STS Prepaid Energy Meter CA368 offers options for extended surge protection for lightening up to 13kV and a widevoltage working range -50% ~ +130%. It is intended for unstable grid voltage environment such as African and Central American continent where brownouts and voltage dips are extremely frequent. The meter works in a three phase four wire network with 100 Amp per phase, and 30 Vm withstand of RF immunity, allowing it to operate in very severe environments. It is a perfect revenue protection device for sub-metering of residential, light commercial and industrial applications.

Split Configuration for Increased Revenue Protection

The meter consists of two parts, the MCU (Metering & Control Unit) and UIU (User Interface Unit). TheMCU and UIU is linked via galvanically-isolated 2-wire communication cable or Radio Frequency (RF) communication is also available on request. The UIU is installed within consumer's home for prepaid token input and info inquiry, while MCU is installed in a meter cabinet away from consumers.

Main Feature

20 digit (Standard Transfer Specification) STS encryption

DLMS / COSEM standards compliant

Connect with the backend platform by GPRS, built-in pluggable GPRS module

Disconnects on overload and no credit

Programmable power limit and low credit warning

Tamper detection and event record such as opening cover, reverse connection, black-out

Maximum demand measurement and load profiling (on request)

Utility Benefit

Easy and quick to install with no need of extra communication devices

Input payment control elements, such as emergency unit, tariff, free basic unit, repayment, fixed charge, VAT etc.

4 tariffs /8 time divisions /100 holidays usage recorded on TOU basis

Flexible AMR AMI setup

Support Plug-in GPRS module

Unmatched Versatility in Demanding Environments

When you choose to invest in a Three Phase STS Prepaid Energy Meter, you are selecting hardware built to endure extreme operational stress and physical exposure. While its primary domain includes factory sub-metering and utility billing, we have seen this Three Phase STS Prepaid Energy Meter excel brilliantly in outdoor EV charging depots and agricultural processing plants. Many inferior alternatives suffer from terminal overheating under continuous high-amperage loads or moisture ingress in humid climates. Through rigorous R&D, we have equipped our CA368 with oversized, pure silver-plated copper terminals that guarantee zero voltage drops and eliminate fire hazards. Furthermore, its IP56-rated enclosure ensures that when installed outdoors, the internal cryptographic chips and mechanical keypads remain completely immune to dust storms and torrential rain. By deploying our solution, you optimize your infrastructure while maintaining strict regulatory compliance.

Relentless Quality Control: Forged for Industrial Excellence

Manufacturing a Three Phase STS Prepaid Energy Meter demands a zero-tolerance approach to defects. In our state-of-the-art facility, we implement an automated vision inspection system that scrutinizes every solder joint on the mainboard before assembly. Furthermore, each CA368 undergoes a 72-hour continuous high-load burn-in test in climate-controlled chambers, simulating extreme summer heat and humidity. We also perform rigorous drop tests and dielectric withstand tests to ensure the IP56 enclosure maintains its integrity under physical stress. This exhaustive validation guarantees that when your field technicians install this meter, they are deploying a bulletproof asset.

Navigating Global Compliance & Strategic Procurement

For B2B buyers, procurement is about mitigating risk and ensuring seamless market entry. Our Three Phase STS Prepaid Energy Meter is fully certified by internationally recognized bodies, ensuring it meets the strictest grid codes across Africa, Asia, and Latin America. To streamline your supply chain, we offer flexible OEM packaging options, allowing you to brand the device with your local utility’s logo right from the factory. We also provide comprehensive import documentation, including detailed HS code classifications and localized user manuals, making customs clearance faster and more predictable for international distributors.

Ironclad Project Assurance & Dedicated Support

We don't just ship boxes; we deliver turnkey integration solutions. When you partner with us for large-scale infrastructure projects, you gain access to our dedicated Key Account Engineering Team. If your software developers need assistance integrating the Three Phase STS Prepaid Energy Meter CA368’s Modbus RTU protocol into your existing Vending Management System (VMS), we provide complete API documentation and remote debugging sessions. Additionally, for massive rollout campaigns, we can arrange on-site training workshops for your installation crews, teaching them best practices for wiring three-phase loads and troubleshooting keypad errors, ensuring a flawless deployment from day one.

Comprehensive After-Sales Service: Beyond the Hardware

Our commitment extends far beyond the point of sale. We offer a transparent RMA (Return Merchandise Authorization) program designed to minimize downtime for critical infrastructure. If a unit requires servicing, our rapid diagnostic team provides remote firmware analysis to determine if the issue can be resolved via OTA updates or parameter resets. For confirmed hardware faults, we maintain strategic regional spare parts hubs to expedite replacements. Additionally, we provide quarterly performance reports based on aggregated telemetry data, helping utility operators identify systemic grid anomalies before they escalate into widespread service disruptions.

The E-E-A-T Advantage: Why Industry Leaders Trust Us

Our authority in the prepaid energy sector is backed by years of real-world data and engineering excellence. Experience: Having deployed millions of units globally, we understand the unique challenges of decentralized power grids. Expertise: Our proprietary cryptographic engine ensures that token generation remains mathematically unbreakable against evolving cyber threats. Authoritativeness: Leading smart city initiatives rely on our meters because they guarantee financial transparency for both utilities and consumers. Trustworthiness: We maintain full traceability of every component used in the CA368, providing B2B partners with absolute confidence in the long-term reliability and security of their investments.

Market Edge: Outsmarting Generic Alternatives

While generic meters may look identical on the outside, the internal architecture tells a different story. Competitors often use low-grade relays that weld together under heavy inductive loads, causing catastrophic failures. In contrast, our Three Phase STS Prepaid Energy Meter utilizes industrial-grade magnetic latching relays specifically rated for high motor-start currents. Furthermore, while others rely on fragile membrane keypads that fail in dusty environments, our CA368 features tactile mechanical switches with gold-plated contacts, engineered to withstand millions of presses without losing responsiveness. We build hardware that outlasts the competition.

Expert Insights: Buyer FAQs

Q1: What happens if the power goes out? Will I lose my credit balance?

A: Absolutely not. The Three Phase STS Prepaid Energy Meter features non-volatile memory technology. Your remaining credit balance and all consumption data are permanently saved and will be instantly restored once power returns.

Q2: Is this meter compatible with standard Vending Management Systems (VMS)?

A: Yes. Because it strictly adheres to the international STS protocol, our three-phase keypad meter can seamlessly integrate with any certified third-party VMS and token generation software without requiring proprietary middleware.

Q3: How does the meter handle low-credit warnings in a three-phase setup?

A: It offers customizable multi-stage alarm thresholds. When the balance drops below the preset limit, the LCD screen will flash a warning message. You can even configure it to trigger a temporary relay disconnect to alert the user before fully cutting off three-phase power.

Proven Success: Real-World Deployments

The true impact of our technology is visible in thriving commercial zones. Recently, a major logistics park operator faced severe cash flow issues due to unpaid electricity bills from tenant warehouses. By retrofitting the entire park with our Three Phase STS Prepaid Energy Meter, they transitioned to a fully automated pay-as-you-go model. Facility managers reported a 100% recovery rate on energy costs within two months, completely eliminating bad debt. In another project, an off-grid mining camp utilized our meters to manage diesel generator fuel consumption, correlating kWh usage directly with fuel dispensing tokens. These success stories prove that our meters are not just billing tools, but vital assets for operational profitability.

Product Certificate

Every product undergoes strict quality inspection and performance verification before delivery. Our electrical measuring instruments are tested by the China Quality Supervision and Inspection Center for Electrical Measuring Instruments, an authorized professional testing organization, with official Test Reports and Reliability Prediction Reports issued for product validation.

The testing covers key parameters such as measurement accuracy, electrical performance, operational stability, and product reliability. Supported by recognized certifications including CNAS laboratory accreditation and national inspection qualifications, our products are designed to provide accurate measurement, safe operation, and consistent performance in various application environments.

Through certified testing procedures and rigorous quality management, we ensure every product meets international customers' expectations for reliability and durability.

Production Details