Product Specification

Single Phase Smart Keypad Meter

Overview

The LD103 Single Phase Smart Keypad Meter is an advanced, IoT-ready metering solution designed for accurate energy measurement, prepaid billing, and remote monitoring. Engineered with a user-friendly interface and robust communication capabilities, this meter is ideal for residential complexes, commercial buildings, institutional facilities, and utility grid applications. Operating in prepaid mode, it allows users to purchase electricity credits in advance, eliminating billing disputes, reducing revenue loss for utilities, and encouraging energy conservation.

With its compact design, wide operating voltage range, and compliance with international standards including STS, DLMS, MID, and IEC, the LD103 delivers reliable performance across diverse grid conditions and ensures seamless integration into modern smart grid infrastructure.

Key Advantages

Performance Advantages

Prepaid Energy Management

The LD103 operates in STS-compliant prepaid mode, enabling users to purchase electricity credits in advance through mobile apps, SMS, or vending stations. Real-time balance alerts prevent unexpected power cuts, while flexible recharge options offer convenience for both end-users and utility providers. The prepaid system can also be configured to post-payment mode if required, providing operational flexibility for different market needs.

High-Accuracy Measurement & Monitoring

With Active Class 1 / Class B and Reactive Class 2 measurement accuracy, the LD103 ensures precise tracking of both active and reactive energy consumption. The meter provides real-time monitoring of voltage, current, power factor, frequency, and cumulative energy consumption, enabling transparent energy usage visibility for consumers and accurate billing for utilities.

Reliable Communication & System Integration

Equipped with a standard RS485 communication port supporting MODBUS-RTU protocol, the LD103 enables seamless integration with Advanced Metering Infrastructure (AMI), data concentrators, and building energy management systems. This connectivity supports remote meter reading, real-time data transmission, and centralized energy management, significantly reducing manual reading costs and improving operational efficiency.

Robust Anti-Tamper Security

The LD103 incorporates multiple tamper detection mechanisms to ensure metering integrity and revenue protection:

• Magnetic tamper detection – alerts against magnetic interference attempts
• Cover-open detection – identifies unauthorized access to meter terminals
• Reverse current detection – prevents power theft through reverse polarity connections
• Event logging – records anomalies for audit and fraud investigation purposes

Wide Application & Environmental Adaptability

The LD103 is suitable for a broad range of applications:

• Residential complexes & apartments – ensuring fair billing and promoting energy savings
• Commercial buildings & rental properties – eliminating unpaid electricity bills
• School dormitories & universities – managing energy usage in shared spaces
• Government buildings & public facilities – supporting energy audits and cost control
• Smart grid & utility infrastructure – enabling remote monitoring and load management

Global Compliance & Quality Assurance

The LD103 meets a comprehensive range of international metering standards and certifications:

• STS (Standard Transfer Specification) – ensuring prepayment system interoperability
• DLMS UA (Device Language Message Specification User Association) – compliance with international smart metering communication standards
• MID (Measuring Instruments Directive) – certification for EU market entry
• IDIS (Interoperable Device Interface Specification) – compliance with open smart grid standards
• CE marking – conformity with EU health, safety, and environmental protection standards
• IEC 62053-21 / IEC 62053-23 – compliance with international electricity metering standards

Product Photo

Technical Parameters

About EUE Power – Your Trusted Power Distribution Equipment Manufacturer

EUE Power is a China-based manufacturer specializing in power distribution equipment and energy storage products for global industrial, commercial, and renewable energy applications.

With professional manufacturing capabilities and OEM/ODM support, EUE Power supplies reliable power distribution products including distribution transformers, compact substations, switchgear, UPS systems, and battery energy storage systems.

Our factory combines engineering expertise, strict quality control, and flexible production capabilities to meet different market requirements worldwide.

Whether you are looking for a reliable distribution transformer supplier, compact substation manufacturer, switchgear supplier, or energy storage equipment partner, EUE Power provides dependable products and professional support.

Partner with EUE Power for:

• Stable manufacturing quality
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