In modern industrial park power monitoring or the digital transformation of existing distribution cabinets, limited installation space and the cost of equipment power outages are often the biggest obstacles to project implementation. The KPM37 energy meter addresses these pain points with a highly competitive optional feature: Rogowski coil support for 24V backup power supply.
Core Pain Points: Why Choose These Two Technologies?
In actual engineering projects, developers often face two major challenges:
Construction Difficulty: Old distribution cabinets have limited space, busbars cannot be disassembled, and conventional rigid current transformers (CTs) simply cannot be installed.
Monitoring Failure: When the main circuit trips, the meter loses main power and shuts down synchronously; the backend cannot determine through communication whether it is a “human-caused power outage” or a “sudden fault.”
A Powerful Tool for Upgrading: Rogowski Coil Input
Traditional current transformers (CTs) are bulky and rigid, making them extremely difficult to install in old cabinets with dense cabling and compact layouts. The KPM37 energy meter with Rogowski coil completely changes this:
Installation Without Disconnection:The flexible Rogowski coil is as flexible as a “rope,” requiring only wrapping around the busbar or large-diameter cable for deployment, eliminating the need to dismantle the busbar and significantly shortening the construction cycle.
Extremely Wide Measurement Range:From tens of amperes to thousands of amperes, the Rogowski coil maintains excellent linearity and accuracy without the risk of magnetic saturation, making it particularly suitable for high-current industrial applications with fluctuating loads.
Space Saving: The lightweight coil replaces the heavy CT, allowing the 96x96mm panel meter to perform at its best even in confined spaces.
Safety Safeguard: DC 24V Backup Power Input
In critical power systems, the continuity of meter data is crucial. The KPM37 energy meter supports an optional 24V auxiliary backup power supply, adding an extra layer of protection to the system:
Uninterrupted Power Supply During Power Outages: When the main circuit trips due to a fault or maintenance, the 24V backup power supply seamlessly takes over, ensuring the meter’s LCD screen remains lit.
Key Fault Location: Because the meter continues to operate during a main power outage, its communication module continuously uploads status data and fault alarms at the moment of power failure to the backend monitoring system in real time, helping maintenance personnel accurately locate the initial fault point, rather than blindly attempting repairs.
Core Technology Selection Reminder
To ensure the electrical isolation safety and structural optimization of the meter, the “Rogowski coil input” and “24V backup power supply” are mutually exclusive functions. When ordering, you must choose one based on the actual site requirements:
Priority for Retrofit Projects: Rogowski coil solution. Suitable for upgrades to existing power distribution systems where power outages are inconvenient, space is limited, and rapid delivery is required.
Priority for High-Reliability Projects: 24V backup power supply solution. Suitable for scenarios with stringent requirements for power outage alarms and data continuity, such as data centers, hospitals, and critical production lines.
KPM37 Selection Strategy: How to Precisely Adapt to the Project Environment?
Due to physical architecture limitations, Rogowski coil inputs and 24V backup power cannot coexist on the same instrument. To ensure maximum project benefits, it is recommended to select a suitable instrument based on the actual engineering environment:
1. For energy-saving retrofits of existing buildings
KPM37-Rogowski Coil Version is recommended. Primarily used in older distribution cabinets where power outages are impossible or where busbar space is extremely limited. No busbar disassembly is required; the flexible coil is ready to use immediately, reducing on-site construction costs and downtime losses by over 60%.
2. For newly built data centers or medical institutions
KPM37-24V Backup Power Version is recommended. These scenarios have near-stringent requirements for data continuity. When used with a DC UPS system in the computer room, even if the main circuit experiences a power outage due to a fault, the instrument can remain online and report accurate power outage alarms to the backend, acting as the “black box” of the power system.
3. For high-power metallurgical or heavy industrial sites
We recommend the KPM37-Rogowski coil version. Utilizing the non-magnetic saturation and excellent linearity of Rogowski coils, it perfectly handles the high instantaneous current surges generated during high-power motor startup or furnace operation, ensuring accurate and undistorted measurement data even at high measurement ranges.
4. For unattended power stations or smart property management
We recommend the KPM37-24V backup power version. This ensures that management personnel can always see the instrument’s communication status from the backend. Even if the circuit is shut down under no-load conditions, the communication link maintained by the backup power supply can provide real-time feedback on the field environment, eliminating monitoring blind spots.
Summary
The KPM37 energy meter is more than just a measuring instrument; it’s an intelligent terminal that solves installation challenges and improves operational safety. Whether you’re facing the intelligent transformation of old cabinets or need to build a “never-ending” monitoring system, it provides technical support that directly addresses your pain points.
