7SR5421-3AD26-1AA0
Transformer prot. 7SR54 8 curr. trans., 4 volt. trans., 3 AFD (Arc Flash Detector), 22 BI, 15 BO (incl. 3 HSBO) Standard interface: 1 x USB (front), RS 485 (rear) + 2 x optical LC ports, S12 enclosure, including conformal coating
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New Sealed — New and unused, supplied in original manufacturer packaging.
New — New and unused. Original manufacturer packaging may be opened, missing or replaced.
Refurbished — Professionally inspected, tested and restored to full working condition.
Used — Previously used, inspected and tested as fully operational.
Condition: New Sealed
£5,334.50
Est. shipping: November 19 2026
View all options and prices (3)
| Condition | Warehouse | Stock | Price | |
|---|---|---|---|---|
|
New Sealed
Full 24 months warranty Est. shipping: November 19 2026 |
WM66-7S | Enquire now | £5,334.50 | Add to Cart |
|
New Sealed
Full 24 months warranty Est. shipping: November 19 2026 |
WM71-7S | Enquire now | £5,660.00 | Add to Cart |
|
New Sealed
Full 24 months warranty Est. shipping: November 19 2026 |
WM92-7S | Enquire now | £6,051.50 | Add to Cart |
Product Overview:
The 7SR5421-3AD26-1AA0 is a transformer protection relay designed for use with Reyrolle 7SR54 series transformers, which feature 8 or 12 current inputs, 4 voltage inputs, and support 2- or 3-winding configurations. It includes functionalities such as circuit breaker monitoring, switching statistics, and arc flash detection (AFD). The relay provides multiple function keys and LEDs for operation and status indication. It is suitable for installation on DIN rails and supports various input voltages from 24 V DC up to 250 V AC. This device is part of Siemens' range of protection relays tailored for transformer monitoring and protection applications.
Siemens is a global leader in industrial automation, digitalisation, and electrification, offering products such as PLCs, drives, industrial robots, and process control systems. Known for innovation and sustainability, Siemens’ technologies enhance efficiency, safety, and performance across industries like manufacturing, energy, and healthcare.
***CJS Automation is NOT an authorised distributor of Siemens***
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