Split Core Zero Squence Current Transformer for Energy Monitoring

• Customization: Available
• Application: Electronic, Instrument
• Type: Current Transformer
• Model NO.: LXK
• Phase: Single
• Operation Condition: Indoor
• Usage: Protection
• Winding Form: Single Layer & Tightly Wound Type
• Insulating Medium: Epoxy Resin
• Installation: Busbar Type
• Magnetic Circuit Structure: Single Stage Type
• Voltage Transformation Principle: Electromagnetic Type
• Transport Package: Wooden Case Packing
• Specification: Inside diameter 80-300mm
• Trademark: Lokedl
• Origin: China
• HS Code: 8504311000
• Production Capacity: 50000

Product Description

Zero-Sequence Current Transformer
Function & Applications

1. Function
Zero-Sequence Current Transformer (ZSCT) is a specialized type of CT designed to detect unbalanced currents (ground faults or leakage currents) in a three-phase electrical system. Unlike standard CTs that measure phase currents, a ZSCT measures the vector sum of the three-phase currents, which should ideally be zero in a balanced system.  
  - The three phase conductors (and neutral, if present) pass through the ZSCT window.  
  - Under normal conditions, the currents cancel each other out (Ia + Ib + Ic = 0).  
  - If a ground fault or leakage occurs, an imbalance residual current, is detected.  
  - The ZSCT converts this residual current into a proportional secondary current for protection devices.  

2. Key Applications
ZSCTs are widely used in:  
2.1. Earth Fault Protection  
   - Detects ground faults in:  
     - Motor circuits  
     - Transformers  
     - Generators  
     - Power distribution networks  
2.2. Residual Current Devices (RCDs) / Ground Fault Circuit Interrupters (GFCIs)
   - Used in low-voltage systems (e.g., homes, industries) to prevent electric shocks and fires.  
2.3. Leakage Current Monitoring 
   - Detects insulation degradation in cables and equipment.  
2.4. Neutral Grounding Systems
   - Monitors faults in resistance-grounded or ungrounded systems.  
2.5. Arc Flash Detection  
   - Helps in identifying arcing faults before they cause damage.  

3. Advantages of ZSCTs 
- High sensitivity to small leakage currents.  
- No need for individual phase CTs (simpler installation).  
- Works with relays and circuit breakers for automatic tripping.  

4. Common Standards
- IEC 61869 (Instrument Transformers)  
- IEEE C57.13 (CT Standards)  

ZSCTs are essential for safety and protection in electrical systems, ensuring quick detection of ground faults and preventing equipment damage or hazardous situations.  

Product Description

Technical data form
Type	Type of relay	Connecting method of relay winding	Relay setting current(mA)	Primary zero-sequence current(A)
LXK-φ80-140	DD-11/60	Series	15×1	2.4-4.5
			30×1
		Parallel	15×2	3-5
			30×2
	DD-1/60	Series	15×1	3-5
			30×1
		Parallel	15×2	3-6
			30×2

 Outline DimensionsNeed custom sizes? Contact us-we can make it happen.
 

Main Products

Company Profile

Zhejiang Luoke predecessor was Yueqing Luoke Power Electric Appliance Co., Ltd., which was established in 2010. Due to the company's development needs, it was renamed Zhejiang Luoke Power Technology Co., Ltd. in 2018. It is a company with distribution network automation products as the main body, integrating design, research and development, production, and sales of power system products. The company mainly produces 10-35kV medium voltage inflatable cabinet special current and voltage transformers, primary and secondary fusion column switch special current and voltage and electronic transformers, center cabinets, ring network cabinets and other supporting current and voltage transformers and zero sequence transformers.

The company has a high-end technology research and development team and first-class production equipment in the industry. With unique design and leading technology, it can not only produce conventional products that meet national standards, but also meet the technical requirements (including appearance) provided by customers.We have passed ISO9001, IsO14001, ISO45001 system. Our products have passed national "ccc certificate", "coc certificate" and several national authoritative laboratory type test certificate, such as Wuhan High Voltage Research Institute. and Xi'an High Voltage Research Institute.With our excellent quality, design and manufacture, competitive price advantage, good service, efficient assistance, our products hot sell in China and have been exported to Asia, Europe, Africa, Middle-east and America countries and areas.In the development, the company has always insisted on taking scientific and technological I innovation as the driving force, market demand-oriented, and the tenet of "safe production,l customer first, first-class quality", high requirements and high starting point. High standards continue to develop new products that adapt to changes in the market. Under the fierce market competition, the company gives full plav to its technological advantages to meet customer needs. " Innovative development,win-win cooperation" in the future development, Zhejiang Luoke will play the goal of striving for a well-known brand, take customer satisfaction as the purpose, and work together, develop together, and create brilliance with new and old customers from all walks of life. Dedicated to the safe and efficient use of electricity, we warmly welcome all over the world friends cooperate with us!

Our workshops and testing rooms:

Our Advantages

Choose us for reliable, innovative, and customized transformer solutions that power your success.
 

Our Customers

Exhibition

FAQ

1. What customization options do you offer?
We provide tailored solutions based on your specific requirements, including adjustments to dimensions, performance specifications,
and other technical parameters. Contact us with your needs, and we'll confirm feasibility.  

2. How do I request a custom product?
Simply send us your detailed specifications (e.g., technical drawings, performance standards, or samples). Our team will evaluate and provide a solution within 2 business days.  

3. Are there minimum order quantities (MOQ) for customized products?  
MOQ depends on the complexity of customization. Standard products may have low MOQs, while highly specialized designs may require larger volumes. Discuss your needs with us for clarity.  

4. What's the lead time for custom orders?  
Lead times vary based on design complexity and order volume. Standard products ship in 2 weeks, while custom projects may take longer. We'll provide a timeline after reviewing your requirements.  

5. Can you meet international certifications/standards (IEC, CE, ISO, etc.)?
Yes, we comply with major international standards. Specify your certification requirements, and we'll ensure compliance.  

6. How do you ensure quality for custom products?
We conduct rigorous in-house testing and offer third-party inspections if needed. Prototypes can be provided for approval before mass production.  

7. What if I need technical support after purchase?
Our team provides lifelong technical assistance, including installation guides, troubleshooting, and spare parts support.  

8. Do you offer samples? Are they free?  
Samples are available for evaluation. Costs depend on product complexity-contact us for details.  

9. What's your payment terms for custom orders?
Standard terms include [T/T, L/C, etc.], with deposits required for custom projects. Terms are negotiable for long-term partnerships.  

10. How do you handle shipping and logistics?
We work with reliable global carriers (DHL, FedEx, sea freight, etc.) and handle customs documentation. Incoterms (EXW, FOB, CIF, CFR, etc.) can be negotiated.