The REX 521 Feeder Protection Relay is designed for the protection, control, measurement, and supervision of medium voltage networks. It also protects large and medium-sized three-phase AC motors in circuit breaker-controlled motor drives. This relay provides robust protection for both utility substations and industrial power distribution systems. Though it is no longer an active product since 2012, the REX 521 is still used in legacy installations.
Features
Multi-Functional Protection: The relay offers protection for feeders, motors, and substations.
Input Compatibility: Supports conventional current and voltage transformers, as well as hardware versions for current and voltage sensors.
Pre-configured Settings: Pre-made standard configurations make the unit adaptable to different network types.
Extended Functions: Provides efficient protection with extended measuring, supervision, and control functionalities.
Single Busbar Solutions: Suitable for single busbar configurations, with a single circuit breaker for various protections.
Technical Specifications
Network Compatibility: Medium voltage networks, radial isolated neutral, resonant earthed, solidly earthed, and resistively earthed systems.
Motor Protection: Designed for large and medium-size three-phase AC motors.
Transformer Protection: Can be used as backup protection for power transformers and high-voltage line-protection relays.
Inputs: Compatible with conventional current and voltage transformers, with a version available for current and voltage sensors.
Answer 1: PLC DCS Pro Ltd. collaborates with over 50 countries worldwide. As a leading supplier in China, we can provide significant discounts to customers based on market demand.
Question 2: What Is The Warranty Period?
Answer 2: We offer a standard one-year warranty for all new and original items.
Question 3: What Payment Methods Do We Accept?
Answer 3: We accept 100% T/T (Telegraphic Transfer) before shipping. For items with a lead time, a 30% deposit is required in advance, with the remaining 70% balance due before shipping. If you have an agent in China, please contact us for RMB transfer.
Question 4: What Shipping Methods Do We Use?
Answer 4: We primarily utilize carriers such as FedEx, DHL, UPS, BRE, etc. If you have an account with any of these carriers, you can arrange the shipping yourself. Additionally, we offer free shipping to China freight forwarders.
Question 5: What Is Our Delivery Time?
Answer 5: Typically, delivery takes around 1-3 days after receiving the advance payment. For items with a quoted lead time, delivery will occur as per the specified lead time.
Question 6: How Do We Package The Goods?
Answer 6: Our packaging process involves multiple layers of protection. Initially, the product is placed in its original box, sealed with a label. Then, we add a layer of bubble wrap to safeguard against collisions during transportation. Finally, all products are securely packed in sturdy boxes for further protection.
Question 7: How Can Customers Contact Us And Request A Quote?
Answer 7: Customers can inquire via email, WhatsApp, WeChat, Skype, or any preferred communication platform. Simply reach out to us, and we'll promptly provide a quote tailored to your needs.
Warranty Conditions
At PLC DCS Pro Ltd., we are committed to ensuring the quality of our products. Our one-year warranty provides coverage for any defects in material or workmanship, excluding damages caused by deliberate misuse.
🛡️Coverage Details:
This warranty encompasses all instances of product malfunction or failure due to inherent manufacturing flaws, with the exception of intentional damage.
📝Claim Process:
To avail of warranty services, please notify us of any quality-related issues within the warranty period. We may conduct online troubleshooting and examination as needed.
🚚Shipping Assistance:
We understand the importance of prompt service. Therefore, we cover return shipping costs for warranty-related returns within the first month of supply. Within three months of supply, we cover one-way shipping costs for warranty-related returns. After three months, the customer is responsible for shipping costs both ways.
🚫Exclusions:
Unauthorized modifications, repairs, or misuse of the product.
