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ABB|RET521|Protection and Control Terminal
SKU: RET521

  • Manufacturer: ABB

  • Product No.: RET521

  • Condition：In stock

  • Product Type: Protection and Control Terminal

  • Product Origin: USA

  • Payment:T/T, Western Union

  • Weight: 800g

  • Shipping port: Xiamen

  • Warranty: 12 months

ABB RET521 Protection and Control Terminal

Description
ABB RET521 is a multifunctional protection and control terminal designed for feeder and motor applications in utility and industrial power systems.

Features
Integrated analog input processing
Configurable binary I/O modules
DSP-based protection algorithms
Front HMI with LCD and LED indicators
Dual communication interface support
mA analog input option

Technical Specifications
Current input: 1 A or 5 A; burden < 0.25 VA
Voltage input: 100–120 V; burden < 0.2 VA
Frequency range: 50/60 Hz ±2.5 Hz (standard), extended to (0.7–1.2) × fr
Auxiliary DC supply: 24–60 V or 90–250 V ±20%; power consumption < 35 W
Binary inputs: Optocoupler-isolated; voltage options 24/48/110/220 V DC
Binary outputs: Up to 24 relay contacts; making capacity 30 A (0.2 s), breaking capacity 8 A at 250 V AC
mA input module: 6 channels, 0–20 mA (4–20 mA), Rin = 194 Ω
Operating temperature: –10°C to +55°C
Immunity: IEC 60255-22 series compliant (ESD 8 kV, burst 2.5 kV, surge 1–2 kV)
Dielectric test: 2.0 kV AC, 1 min
Insulation resistance: >100 MΩ at 500 V DC

Order and Warranty Information

Terms of Purchase and Returns

Detailed guidelines on minimum order quantity, delivery times, payment options, warranty, and return policies.

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We gladly accept bulk orders, with a minimum order quantity of just one unit.

Upon request, we can provide all necessary documents, including Certificates of Origin/Conformance and other required export paperwork.

We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% payable before shipment. For RMB transfers, please contact us if you have an agent in China.

All new and original items come with a standard one-year warranty. For extended warranty options, feel free to contact us for pricing details.

We prioritize your satisfaction. If you need to return an item, it must be done within 30 days of purchase. The product must be unused, unopened, and in its original packaging, including all accessories. Refunds will be processed within 5-7 business days of receiving the return. Please note, shipping and handling charges are non-refundable.
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Descriptions

ABB RET521 Protection and Control Terminal

Description
ABB RET521 is a multifunctional protection and control terminal designed for feeder and motor applications in utility and industrial power systems.

Features
Integrated analog input processing
Configurable binary I/O modules
DSP-based protection algorithms
Front HMI with LCD and LED indicators
Dual communication interface support
mA analog input option

Technical Specifications
Current input: 1 A or 5 A; burden < 0.25 VA
Voltage input: 100–120 V; burden < 0.2 VA
Frequency range: 50/60 Hz ±2.5 Hz (standard), extended to (0.7–1.2) × fr
Auxiliary DC supply: 24–60 V or 90–250 V ±20%; power consumption < 35 W
Binary inputs: Optocoupler-isolated; voltage options 24/48/110/220 V DC
Binary outputs: Up to 24 relay contacts; making capacity 30 A (0.2 s), breaking capacity 8 A at 250 V AC
mA input module: 6 channels, 0–20 mA (4–20 mA), Rin = 194 Ω
Operating temperature: –10°C to +55°C
Immunity: IEC 60255-22 series compliant (ESD 8 kV, burst 2.5 kV, surge 1–2 kV)
Dielectric test: 2.0 kV AC, 1 min
Insulation resistance: >100 MΩ at 500 V DC