As distributed photovoltaics, energy storage systems, electric vehicle charging facilities, and industrial and commercial loads continue to grow, traditional distribution networks are moving from one-way power delivery toward smart grids that can be sensed, analyzed, and dispatched.
For distribution operators, energy management platforms, building operation teams, and equipment manufacturers, accurate, reliable, and easy-to-install current measurement has become a foundation for energy transparency, load optimization, fault warning, and predictive maintenance.
PowerUC provides Rogowski coils, split-core current transformers, solid-core current transformers, and related measurement components for MV/LV substation monitoring, IoT remote energy monitoring, distribution cabinets, and smart building submetering.
What is smart grid and metering?
A smart grid uses sensors, smart meters, communication networks, and energy management platforms to collect and analyze voltage, current, power, power quality, and equipment status across the distribution network.
In metering applications, current sensors do more than record energy data. They help identify abnormal loads, capture peak current, judge equipment operating status, support power-quality analysis, and enable remote operation and maintenance. In substations, industrial sites, commercial buildings, and distributed IoT terminals, the right current measurement product improves deployment efficiency and data reliability.
PowerUC Rogowski coils, split-core current transformers, and solid-core current transformers can be selected according to installation space, current range, accuracy requirements, and output interface, providing stable front-end measurement for smart-grid and metering systems.
MV/LV substation low-voltage-side monitoring
In medium- and low-voltage substations, distribution transformers convert medium-voltage power into low-voltage power and supply end users through low-voltage cabinets. These cabinets often have limited space, complex wiring, and high retrofit cost. In existing substations, shutdown requirements and busbar space constraints can make installation more difficult.
By installing Rogowski coils on the transformer low-voltage side and connecting them to smart meters, data acquisition terminals, or energy management platforms, the system can continuously collect three-phase current, load variation, power direction, peak current, and power-quality data. This gives operators a clearer view of distribution-network operating status.
For distribution operators and system integrators, this approach can improve low-voltage network visibility without large-scale primary-system reconstruction, providing a reliable data entry point for smart transformer areas, distribution automation, and energy management platforms.
IoT remote energy monitoring
Industrial equipment, pump stations, HVAC systems, charging facilities, telecom base stations, agricultural irrigation equipment, and commercial load terminals are often distributed across wide areas. Site wiring can be difficult and manual inspection can be expensive. IoT remote energy monitoring uses current acquisition terminals, wireless communication modules, and cloud platforms to monitor distributed equipment remotely.
The system can periodically collect RMS current, operating time, start-stop counts, energy trends, and abnormal peaks. Data can be uploaded by LoRa, NB-IoT, 4G, Wi-Fi, RS-485, MQTT, or similar communication methods. Operation teams can view equipment status from web or mobile dashboards and receive alarms for overload, power loss, abnormal startup, or excessive energy use.
Split-core current transformers are suitable for small and medium current equipment, especially retrofit projects on existing lines. Their opening structure allows installation around cables without disconnecting the circuit, making them practical for fast deployment of many monitoring points such as lighting circuits, pumps, motors, HVAC, fresh-air systems, and small distribution branches.
Rogowski coils are suitable for high-current applications, thick cables, multi-core cables, and busbar measurement, especially where space is limited, load-current variation is wide, or installation flexibility is important.
Distribution cabinets and smart building submetering
Commercial complexes, office buildings, hotels, hospitals, schools, factories, and data centers usually contain many circuits, including lighting, HVAC, elevators, power equipment, socket circuits, charging piles, kitchen equipment, and IT loads. To support energy-saving management, cost allocation, and carbon-emission accounting, systems need submetering by area, floor, equipment, and functional circuit.
The core of submetering is accurately collecting current data from each load circuit and connecting it to smart meters, building automation systems, energy management systems, or BMS platforms. Because distribution cabinets often have limited internal space and projects may include both existing and new cabinets, different current transformer and Rogowski coil options are selected based on installation conditions.
Solid-core current transformers are suitable for new distribution cabinets or projects where cables can be threaded through the transformer. They provide stable structure for long-term fixed installation and are often used in standard branch metering, meter matching, and internal integration in distribution equipment.
Split-core current transformers are suitable for retrofitting existing distribution cabinets. They can be installed without removing wires, reducing installation time and limiting the impact of power outages. Rogowski coils are suitable for main incoming feeders, high-current busbars, large equipment circuits, and space-constrained positions.
PowerUC advantages for smart grid and metering
Flexible installation
Solid-core, split-core, and Rogowski coil structures support new cabinets, existing distribution cabinets, low-voltage busbars, equipment cables, and distributed IoT terminals.
Broad current range coverage
From small branch circuits to high-current main loops, PowerUC can provide suitable current transformer or Rogowski coil options for multi-level current acquisition on one platform.
Compatible with meters and communication terminals
PowerUC products can work with smart meters, acquisition modules, edge gateways, remote energy terminals, and energy management platforms for local or cloud data access.
Suitable for retrofit and batch deployment
Split-core transformers and Rogowski coils support installation without disconnecting cables, reducing construction difficulty and project schedule for building retrofits and smart distribution upgrades.
System integration and customization support
For smart grids, building energy management, IoT remote monitoring, and distribution-equipment manufacturing, PowerUC helps customers balance accuracy, size, output method, installation method, and cost.
