Schneider A9MEM3255 Multifunction Power Meter

Description

Schneider A9MEM3255 Multifunction Power Meter

The Schneider Electric A9MEM3255 is a three-phase DIN-rail mounted energy meter belonging to the Acti9 iEM3000 series. It is designed for precise energy measurement, cost allocation, and sub-billing in commercial and industrial electrical distribution systems.

Product Detailed Description

The A9MEM3255 (also known as iEM3255) is a Current Transformer (CT) connected energy meter (1A or 5A secondary) capable of measuring both active and reactive energy in 3P, 3P+N, and 1P+N network configurations. It features native Modbus RTU (RS-485) communication, multi-tariff management, and MID compliance (Measuring Instruments Directive), making it legally certified for sub-billing applications across Europe and global markets.

Technical Parameters

Product Advantages

• High Measurement Accuracy: Class 0.5S accuracy ensures accurate sub-billing and precise energy profiling even at low load currents.
• MID Certification: Complies with European MID standards, allowing facility managers and landlords to legally charge tenants for electrical consumption.
• Compact DIN-Rail Design: Occupies only 5 module widths (90 mm), saving valuable space inside control cabinets and distribution boards.
• Multi-Tariff Flexibility: Enables dynamic cost allocation based on peak and off-peak utility tariffs using external digital signals or network communication.
• Seamless Connectivity: Native Modbus RS-485 port allows direct integration into Energy Management Systems (EMS), SCADA, or EcoStruxure™ Power Monitoring platforms.

Important Considerations & Precautions

• CT Ratio Setup: Always configure the primary and secondary CT ratios correctly in the meter setup menu before placing it in service. An incorrect CT ratio will lead to incorrect energy totals.
• Phase Sequence & Polarity: Ensure proper wiring orientation (S1/S2 or K/L) of the current transformers. Reversing CT polarity will cause negative power readings or inaccuracies.
• RS-485 Bus Termination: On long Modbus RS-485 communication runs, install a 120 \Omega termination resistor at both physical ends of the bus to prevent signal reflection.
• External Voltage Fuses: Install 0.5A fast-acting protection fuses on the voltage measurement inputs (V1, V2, V3, VN) to safeguard the meter against overvoltage transients.

Product Applications

• Sub-Billing & Cost Allocation: Measuring power consumption for individual tenants in commercial buildings, shopping malls, and industrial parks.
• Energy Management Systems (EMS): Tracking energy usage patterns across different feeders and manufacturing lines to identify energy waste.
• Data Center Power Monitoring: Monitoring energy consumption on Power Distribution Units (PDUs) and server rack feeds.
• Infrastructure & Renewable Energy: Sub-metering EV charging stations, solar PV generation lines, and HVAC plants.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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