Overview
The ABB RET521 is a numerical transformer protection relay designed to deliver advanced protection and control for power transformers in utility substations and industrial power systems. It consolidates multiple standalone relays by integrating differential protection, overcurrent protection, voltage supervision, and breaker control into a single device.
This model supports multi-breaker arrangements and does not require interposing CTs, simplifying system design and reducing installation complexity.
Technical Data
| Parameter | Specification |
|---|---|
| Product Type | Transformer Protection Terminal / Relay |
| Model Number | RET521 |
| Part Number | 1MRK001530-AE |
| Dimensions | 329 × 260 × 270 mm |
| Weight | 5 kg |
Key Features
-
Differential protection for two- and three-winding transformers
-
Integrated breaker control and switchgear management
-
Wide and flexible frequency range for diverse grid conditions
-
Event logs and disturbance recording for fault analysis
-
IEC 61850 compliance for digital substations
-
No interposing CTs required, simplifying installation
Typical Applications
-
Utility substations: Protection for power transformers and generator-transformer blocks
-
Industrial power systems: Reliable protection for critical plant transformers
-
Renewable energy plants: Advanced detection and control for grid-connected transformers
-
Reactors & multi-breaker arrangements: Supports complex transformer configurations
FAQ
Q1: What is the primary function of the ABB RET521?
A1: To provide protection, control, and monitoring for power transformers, integrating multiple protective functions into one device.
Q2: Can the RET521 handle three-winding transformers?
A2: Yes, it supports both two-winding and three-winding transformer applications.
Q3: What communication protocols does it support?
A3: IEC 61850, Modbus, and DNP3.
Q4: Does the RET521 require interposing CTs?
A4: No, it eliminates the need for interposing CTs, simplifying installation.
Q5: Where is the RET521 typically used?
A5: In utility substations, industrial facilities, renewable energy plants, and systems requiring advanced transformer protection.
| Quick Quotes | Receive price & availability FAST from our dedicated customer service team. |
|---|---|
| Delivery | Expedited, Freight, And International Shipping Available. |
| Condition | 100% New with Original Package |
| Payment | We accept American Express, Discover, MasterCard, PayPal, and Visa. Our site is secured by RapidSSL. |
| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
| Q: Is Our Pricing Competitive? |
| A: Yes, we collaborate with over 50 countries worldwide. As a top supplier in China, we offer significant discounts based on market trends. |
| Q: What Is the Warranty Period? |
| A: All our new and original products come with a standard one-year warranty. |
| Q: What Payment Methods Do We Accept? |
| A: We require 100% T/T (Telegraphic Transfer) payment before shipping. For items with a lead time, a 30% deposit is needed upfront, and the remaining 70% is due before shipping. If you have a representative in China, you can arrange an RMB transfer through them. |
| Q: What Shipping Methods Do We Use? |
| A: We primarily use FedEx, DHL, UPS, and BRE for shipping. If you have an account with any of these carriers, you can handle shipping directly. We also offer free shipping to China-based freight forwarders. |
| Q: What Is Our Delivery Time? |
| A: Delivery usually takes 1-3 days after receiving the initial payment. For items with a lead time, shipping will occur according to the specified schedule. |
| Q: How Do We Package the Goods? |
| A: We ensure safe packaging with multiple layers of protection. Products are first placed in their original boxes and sealed with labels. A layer of bubble wrap is then added for collision protection during transit. Finally, the items are packed securely in durable boxes. |
| Q: How Can Customers Contact Us and Request a Quote? |
| A: You can reach out to us via email, WhatsApp, WeChat, Skype, or your preferred communication platform. Contact us with your needs, and we'll provide a prompt, customized quote. |
Recently Viewed
Express Shipping
Extensive Inventory
Quality Assurance
