Overview
The ABB REJ603BB401NN31E Protection Relay is a self‑powered feeder protection relay, part of ABB's Relion® 600 series. This relay is specifically engineered for secondary distribution networks, where reliable fault protection is critical. It is powered directly from the current transformers (CTs) connected to the feeder, eliminating the need for an external auxiliary power supply, making it perfect for installations with limited or unavailable auxiliary voltage sources.
The REJ603 offers selective short-circuit and earth-fault protection, ensuring quick fault detection and tripping to safeguard both equipment and personnel. Its compact design and ease of installation make it well-suited for use in ring main units (RMUs), compact substations, and distribution automation projects.
Technical Data
| Parameter | Specification |
|---|---|
| Model | REJ603BB401NN31E |
| Function | Self-powered feeder protection relay |
| Dimensions | 160 × 96 × 150 mm |
| Weight | 1.9 kg |
Typical Applications
-
Ring Main Units (RMUs): Ideal for compact substations requiring self-powered protection.
-
Secondary Distribution Networks: Reliable fault detection without the need for auxiliary power.
-
Industrial Plants: Protects feeders in chemical, paper, textile, and steel industries.
-
Power Utilities: Perfect for distribution automation projects where auxiliary voltage sources are limited.
-
Retrofit Projects: Replaces legacy feeder protection relays with modern ABB solutions.
FAQ
Q1: What is the ABB REJ603BB401NN31E used for?
A1: It provides selective short-circuit and earth-fault protection for medium-voltage distribution networks.
Q2: Does the REJ603 require an auxiliary power supply?
A2: No, it is self-powered via current transformers, making it ideal for installations where auxiliary voltage is unavailable.
Q3: What industries typically use the REJ603 relay?
A3: It is widely used in power utilities, industrial plants, and compact substations.
Q4: How reliable is the ABB REJ603?
A4: The REJ603 stores up to 100 fault records and operates independently of external power, ensuring dependable long-term 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
