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ABB REX010 (HESG324426R0001) Numerical Protection Relay

The ABB REX010 (HESG324426R0001) is a high-performance numerical protection relay from ABB’s protection and automation portfolio, built for safety and control in industrial and utility power networks. It integrates multiple protection functions into a single device, ensuring fast, accurate fault detection and isolation. With flexible configuration, wide-range power supply, and robust communication, the REX010 serves as a cost-effective solution for distribution substations, motor control centers, and critical industrial loads.

Description
Product Overview:

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ABBREX010 (HESG324426R0001)is a multifunctional numerical protection relay engineered for medium and low‑voltage (MV/LV) distribution systems. It delivers core protection including overcurrent (50/51), earth fault (50N/51N), under/overvoltage (27/59), and frequency (81H/81L) protection, with user‑configurable IDMT or definite‑time curves.
The relay accepts 1A/5A CT inputs and 100–240V AC/DC voltage inputs, with high accuracy (±1–2% FS) and a sampling rate ≥1kHz. It features a wide‑range power supply (24–250VDC / 100–240VAC) and low power consumption (≤10W max). Communication options include Modbus RTU/TCP, Ethernet (IEC 61850 optional), and PROFIBUS DP for seamless SCADA integration.
Designed for industrial harshness, the REX010 operates from −25°C to +70°C, offers IP40 protection, and complies with IEC 60255, UL 508, and CE standards. Its compact panel/DIN‑rail mount design and LCD with multilingual support simplify installation and operation.

ABB REX010 (HESG324426R0001) Numerical Protection Relay

Technical Specifications:
AttributeDetails
ManufacturerABB
ModelREX010
Part NumberHESG324426R0001
Product TypeNumerical Protection Relay
ApplicationMedium/Low‑voltage distribution, industrial power systems
Protection FunctionsOvercurrent (50/51), Earth Fault (50N/51N), Under/Overvoltage (27/59), Frequency (81H/81L)
Protection CurvesIDMT, Definite Time (DT), user‑configurable
Current Input1A or 5A (CT secondary), ±1–2% accuracy
Voltage Input100–240V AC/DC (PT secondary)
Power Supply24–250VDC / 100–240VAC, ≤15W max
CommunicationModbus RTU/TCP, Ethernet (IEC 61850 opt.), PROFIBUS DP
Digital Inputs4–16 (configurable)
Relay Outputs4–8 programmable contacts, 5A @ 250VAC
Operating Temperature−25°C to +70°C
Protection ClassIP40 (cabinet/panel)
MountingDIN‑rail or panel‑mounted
CertificationsIEC 60255, UL 508, CE, ATEX (optional)

ABB REX010 (HESG324426R0001) Numerical Protection Relay

Key Features & Advantages:
  • Multifunctional Protection: Combines overcurrent, earth fault, voltage, and frequency protection in one unit.

  • High Measurement Accuracy: ±1–2% FS precision, sampling rate ≥1kHz for reliable fault detection.

  • Flexible Configuration: User‑defined IDMT/DT curves and customizable I/O mapping.

  • Wide‑Range Power Supply: 24–250VDC / 100–240VAC for global deployment.

  • Robust Communication: Modbus, Ethernet (IEC 61850), PROFIBUS for SCADA integration.

  • Harsh Environment Ready: −25°C to +70°C operation, IP40, IEC 60255 compliance.

  • Compact & User‑Friendly: DIN‑rail/panel mount, multilingual LCD, easy setup and maintenance.

ABB REX010 (HESG324426R0001) Numerical Protection Relay

Application Fields:
  • Power Distribution: MV/LV substations, switchgear, and distribution feeders.

  • Industrial Plants: Motor control centers (MCC), pumps, fans, and critical motor protection.

  • Renewable Energy: Solar/wind farm grid connection and interconnection protection.

  • Utilities: Municipal power networks, water treatment plants, and wastewater facilities.

  • Commercial Buildings: Large HVAC, elevators, and backup power system protection.

FAQ:

Q1: What is ABB REX010 used for?

A1: It is a numerical protection relay for MV/LV distribution, protecting against overcurrent, earth fault, voltage, and frequency abnormalities.

Q2: What CT/PT inputs does it support?

A2: 1A/5A CT and 100–240V AC/DC PT inputs, software‑configurable.

Q3: What communication protocols are available?

A3: Modbus RTU/TCP, Ethernet (IEC 61850 optional), PROFIBUS DP.

Q4: What is the operating temperature range?

A4: −25°C to +70°C, suitable for harsh industrial environments.

Q5: Can it be mounted on DIN rail?

A5: Yes, it supports both DIN‑rail and panel‑mounted installation。

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple as possible, we offer multiple payment methods including bank transfer, check, and PayPal. Meanwhile, we also accept most mainstream credit and debit cards, such as Visa, Mastercard, and American Express. We can accept payments in most major currencies worldwide, but we recommend using US dollars (USD), British pounds (GBP), or euros (EUR) as a priority. Payments in other currencies may incur additional fees. All transactions are securely processed by HSBC Bank and HSBC Merchant Services.

How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.

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Guangzhou Qiming Automation Technology Co., Ltd
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Road, Tianhe District, Guangzhou City
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