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Technical Specifications
| Parameter Name | Value |
|---|---|
| Product Model | ABB 1MRK002247-AH |
| Manufacturer | ABB |
| Product Type | Auxiliary CT/VT Transformer / Interface Module |
| System Platform | ABB Relion 670 / 650 Series Protection IEDs |
| CT Input Channels | 6 Channels (5A Nominal Primary) |
| VT Input Channels | 6 Channels (100/110/220V AC Nominal) |
| Frequency | 50/60 Hz |
| Isolation Voltage | 1000V AC (System-to-Field) |
| Termination Type | Compression Lug (AH Suffix) |
| Operating Temperature | -20°C to +50°C |
| Mounting Type | Plug-in Installation within IED Chassis |
| Product Status | Active Spare Part for Power Systems |
Main Features and Advantages
The ABB 1MRK002247-AH is distinguished by its purpose-built design for protection relay applications, offering a level of precision and reliability that general-purpose transducers cannot match. Its most critical advantage is the high measurement accuracy and extremely low phase error. The ABB 1MRK002247-AH is optically and electrically designed to preserve the fidelity of the CT and VT signals, which is paramount for the correct operation of sophisticated protection algorithms such as differential protection, distance protection, and overcurrent protection. Any signal distortion introduced by the ABB 1MRK002247-AH could lead to mal-operation or failure to operate, making its precision a non-negotiable feature for system security .
High-Density Channel Configuration: The ABB 1MRK002247-AH features a high-density 6I+6U configuration, providing six current and six voltage input channels within a single, compact module that installs directly within the relay chassis . This integration eliminates the need for external wiring to separate transducers, significantly reducing panel space requirements and the number of potential failure points in the CT/VT secondary circuits. This density makes the ABB 1MRK002247-AH a highly efficient solution for managing the multiple CT and VT inputs required for transformer, busbar, and line protection schemes.
Robust Construction and Secure Termination: The ABB 1MRK002247-AH is built to the rigorous quality standards expected of ABB protection equipment. The “AH” suffix in the model number denotes that it is equipped with compression-type terminals, providing a highly secure and reliable means of connecting the CT and VT secondary wires . This termination method ensures a gas-tight, low-resistance connection that is resistant to vibration and corrosion, offering long-term stability. Furthermore, the module’s design has been validated for the demanding electrical and thermal environment of a protection panel, ensuring decades of reliable service with minimal maintenance.
