The Woodward WIP11-I1 is a self-powered time-overcurrent relay for reliable feeder protection. It derives operating energy directly from the measured current transformer input. Therefore, the relay continues protecting circuits even during auxiliary supply failures. Engineers value its independence from external power in critical distribution systems.
The device provides precise overcurrent detection with configurable time characteristics. Moreover, it supports both definite time and inverse time tripping curves. Utilities and industrial plants rely on it for dependable fault isolation. In addition, the compact design fits easily into medium-voltage switchgear compartments.
Technical Specifications
Parameter
Specification
Manufacturer
Woodward
Model
WIP11-I1
Product Type
Self-Powered Time-Overcurrent Relay
Protection Functions
50/51 Overcurrent Protection
Operating Principle
Self-powered from connected current transformer (CT)
Measured Quantity
Phase current
Rated System Frequency
50 / 60 Hz
CT Secondary Input
Compatible with standard 1 A or 5 A CT secondary
Pickup Current Setting Range
Adjustable via front-panel configuration
Time Characteristic
Definite time and inverse time curves
Time Delay Adjustment
Adjustable according to selected trip curve
Reset Method
Manual reset or automatic reset depending on configuration
Output Contacts
Trip relay output for breaker tripping
Contact Rating
Suitable for breaker trip coil circuits
Auxiliary Power Supply
Not required for protection function
Minimum Operating Current
Sufficient CT secondary current required for self-powering
Indication
LED or mechanical trip indication
Accuracy
High precision current measurement for consistent tripping
Insulation Voltage
Designed for medium-voltage switchgear applications
Dielectric Strength
In accordance with industrial protection relay standards
Operating Temperature Range
–25°C to +70°C
Storage Temperature Range
–40°C to +85°C
Relative Humidity
Up to 95% non-condensing
Mounting Type
Panel or switchgear flush mounting
Housing Type
Industrial-grade enclosure suitable for control panels
Application Scope
Feeder, transformer, and distribution overcurrent protection
FAQ
Q1: What makes the WIP11-I1 self-powered? A: The relay derives its operating energy directly from the connected current transformer.
Q2: Does the relay require an external auxiliary power supply? A: No, it operates independently for basic overcurrent protection functions.
Q3: What protection functions are available? A: It provides time-overcurrent protection with selectable definite and inverse characteristics.
Q4: Where is the WIP11-I1 typically installed? A: It is commonly installed in medium-voltage feeder and transformer protection panels.
Q5: Can it coordinate with other protection relays? A: Yes, adjustable pickup and time settings support proper protection coordination.
Installation Notes
Install within Woodward control racks or cabinets
Connect directly to magnetic pickup sensors near turbine or engine shafts
Use proper wiring and shielding to prevent electrical noise interference
Calibration and verification of MPU signals may be required during commissioning
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.
