Description
ABB 1MRK002247-AGR00 Transformer Input Module
Product Introduction
In a numerical protection relay, the transformer input stage is where field CT and VT secondary signals first enter the protection system. The ABB 1MRK002247-AGR00 is a Relion 670 Series Transformer Input Module (TRM) configured for 6 current inputs rated at 1 A and 6 voltage inputs rated at 110/220 V, 50/60 Hz. ABB’s product guides identify the corresponding 1MRK002247-AG ordering number as selection A6, with compression terminals.
This configuration is used where an ABB 670 Series IED requires a combined CT/VT analog interface. The module is part of the relay’s analog system rather than an independent protection controller. That distinction matters during procurement: the current rating, voltage configuration, connector style, relay model, slot position, and complete hardware configuration all need to match the installed IED. ABB documentation also specifies that when more than one TRM is used, the connector type must be consistent between the modules.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 1MRK002247-AGR00 |
| ABB Base Ordering Number | 1MRK002247-AG |
| Manufacturer | ABB |
| Product Family | Relion 670 Series |
| Product Type | Transformer Input Module (TRM) |
| Analog System Selection | A6 |
| Current Inputs | 6I |
| Current Input Rating | 1 A |
| Voltage Inputs | 6U |
| Voltage Input Rating | 110/220 V |
| Operating Frequency | 50/60 Hz |
| Terminal Type | Compression terminals |
| Function | CT/VT signal interface for protection IED |
| Module Application | Relion 670 Series analog system |
| Revision | R00 |
| Installation | Internal/modular IED installation |
| Host System | ABB 670 Series protection and control IEDs |
ABB’s ordering documentation explicitly identifies 1MRK002247-AG as TRM 6I 1A + 6U 110/220V, 50/60 Hz, compression terminals. The same configuration appears across the REL670, RET670 and REB670 product documentation, although the permitted use and slot configuration can depend on the specific IED variant.
Application Scenarios & Field Considerations
Transformer Protection
The 6I + 6U configuration provides the relay with six 1 A current channels and six 110/220 V voltage channels. This makes the module appropriate for protection applications where both CT and VT signals are required by the selected 670 Series configuration.
Relion 670 Analog Input Architecture
The TRM sits within the analog system of the protection IED. It is not equivalent to a conventional PLC analog input card. ABB’s documentation lists the AG configuration alongside several other TRM combinations, including 12I, 9I + 3U, 6I + 6U, and other CT/VT arrangements.
1MRK002247-AGr00
Transformer and Line Protection Configurations
ABB documentation shows the AG configuration in several 670 Series product guides. For RET670, for example, the 6I 1A + 6U 110/220 V configuration is identified as an available transformer-input arrangement. REL670 documentation also lists it as a TRM configuration, with application restrictions depending on the selected relay configuration.
Replacement of Installed TRM Hardware
For an existing relay, the complete ordering code is more important than simply matching the 1MRK002247 family. The difference between AG, AH, AC, and other suffixes changes the CT rating and/or terminal arrangement. A physically similar TRM is not automatically electrically interchangeable.
Major Features and Advantages
6-Channel 1 A CT Interface
The AG configuration provides six current inputs with a 1 A secondary rating. This is a critical ordering parameter. The closely related 1MRK002247-AH uses the same 6I + 6U arrangement but with 5 A current inputs. The two should not be treated as interchangeable simply because their mechanical configuration is similar.
Six Voltage Inputs
The module also provides six voltage channels rated for 110/220 V at 50/60 Hz. This makes the module suitable for IED configurations requiring multiple voltage measurements in addition to current measurement.
Compression-Terminal Configuration
The AG configuration belongs to the compression-terminal family. ABB separately lists AC as the 6I 1A + 6U 110/220 V version with ring-lug terminals. This is a physical and wiring distinction that needs to be checked before ordering a spare.
Compatibility Across Selected 670 Series Platforms
The same AG ordering number appears in ABB documentation for multiple 670 Series protection applications, including REL670, RET670, REB670 and RED670 documentation. That does not mean unrestricted interchangeability between all IEDs; the selected relay configuration and allowed TRM position still have to be checked.
Related Products
- ABB 1MRK002247-AH — 6I 5A + 6U 110/220 V, 50/60 Hz, compression-terminal TRM. The principal electrical difference from AG is the 5 A CT input rating.
- ABB 1MRK002247-AC — 6I 1A + 6U 110/220 V, 50/60 Hz, ring-lug-terminal version.
- ABB 1MRK002247-AD — 6I 5A + 6U 110/220 V, 50/60 Hz, ring-lug-terminal version.
- ABB 1MRK002247-BG — 9I 1A + 3U 110/220 V, compression-terminal configuration.
- ABB 1MRK002247-BH — 9I 5A + 3U 110/220 V, compression-terminal configuration.
- ABB 1MRK002247-CG — 12I 1A, 50/60 Hz, compression-terminal configuration.
- ABB 1MRK002247-CH — 12I 5A, 50/60 Hz, compression-terminal configuration.
- ABB 1MRK002247-AP — 7I 1A + 5U 110/220 V, 50/60 Hz, compression-terminal configuration.
These are related TRM configurations, not confirmed drop-in replacements for 1MRK002247-AGR00.
Engineer’s Guide — Field Pitfalls to Avoid
1. Do Not Substitute the 5 A Version
The most serious mistake is confusing AG with AH. Both provide 6I + 6U and 110/220 V voltage inputs, but AG is 1 A CT input while AH is 5 A CT input. CT secondary rating must match the protection-system design.
2. Check Compression Versus Ring-Lug Terminals
AG uses compression terminals. AC has the same basic 6I 1A + 6U 110/220 V configuration but uses ring-lug terminals. A spare with the wrong terminal arrangement can create a physical installation problem even when the electrical channel count looks correct.
3. Verify the Host IED and TRM Position
The AG module appears in several 670 Series product guides, but ABB specifies application restrictions for particular relay configurations. For example, the RET670 guide identifies the 6I 1A + 6U arrangement within its analog-system selection, while other configurations have different slot or application restrictions.
4. Confirm the Complete Ordering Code
For procurement, retain the complete identifier 1MRK002247-AGR00, not merely 1MRK002247-AG. The R00 revision designation can matter when comparing an installed spare against an older or later revision.
5. Do Not Treat the TRM as a Standalone Protection Relay
This is a transformer input module inside the ABB protection architecture. It does not independently execute the protection algorithms, communications, event handling, or HMI functions of the host IED.
6. Check Existing CT and VT Wiring Before Energization
A replacement TRM should be checked against the actual site schematic: CT secondary rating, VT secondary voltage, phase arrangement, grounding, terminal assignment, and protection setting configuration. A wrong CT ratio or channel assignment can create a protection-system problem even when the module powers up normally.
FAQ
What is ABB 1MRK002247-AGR00?
ABB 1MRK002247- is the R00 version of the 1MRK002247-AG transformer input configuration, providing six 1 A current inputs and six 110/220 V voltage inputs at 50/60 Hz with compression terminals. ABB documentation identifies the base AG ordering number as selection A6.
Is 1MRK002247- a CT/VT input module?
Yes. It is a Transformer Input Module (TRM) used to interface CT and VT secondary signals with compatible ABB 670 Series protection IEDs. Its AG configuration combines 6I and 6U channels.
What is the difference between 1MRK002247- and 1MRK002247-AHR00?
The key difference is the CT secondary rating. The AG configuration is 6I at 1 A + 6U at 110/220 V, while AH is 6I at 5 A + 6U at 110/220 V. Do not substitute one for the other without confirming the relay configuration and CT design.
What is the difference between AG and AC?
Both are listed as 6I 1A + 6U 110/220 V, 50/60 Hz configurations. AG uses compression terminals, while AC uses ring-lug terminals.
Which ABB relays use the 1MRK002247-AG configuration?
ABB 670 Series documentation lists the AG TRM configuration in several product families, including REL670, RET670, REB670 and RED670 documentation. Actual compatibility depends on the specific relay type, product version, hardware configuration, and allowed TRM position.
Can 1MRK002247- be used as a generic analog input card?
No. Its function is specifically tied to the protection IED’s transformer-input architecture. It should not be treated as a general-purpose PLC/DCS analog input module.
What should procurement verify before purchasing this spare?
Verify the complete 1MRK002247- identifier, host IED model, hardware configuration, 1 A CT rating, 110/220 V VT rating, compression-terminal arrangement, revision, and actual PCB/module markings. For an installed protection system, matching the electrical configuration is more important than finding a module with the same physical dimensions.
What condition should be expected?
The part number does not establish whether a particular unit is new, unused surplus, refurbished, or previously installed. Actual inventory condition, revision, terminal condition, and functional-test status should be verified before the unit is accepted for a protection-system replacement.
