High Precision Secure Electrical Transducer Electromagnetic Current Transformer Sensor for Power System

• Customization: Available
• Type: Electromagnetic
• Output Signal Type: Digital Output
• Model NO.: STW50
• Production Process: Integration
• Material: Plastic
• Accuracy Grade: 0.1G
• Application: Power System
• IP Rating: IP68
• Certification: RoHS
• Customized: Customized
• Function 1: Fault Current Sensing
• Function 2: Precision Protection Actuation
• Funciton 3: Precision Billing Basis
• Function 4: Multi-Type Metering Compatibility
• Transport Package: Carton Box
• Specification: 15*15*10
• Origin: China
• HS Code: 9032890000
• Production Capacity: 1000PCS/Month

Product Description

Current Transformer

What's this product? 

      The Current Transformer (CT) is an electrical device that operates based on the principle of electromagnetic induction. It is primarily used to proportionally convert high currents in three-phase circuits to smaller currents, thereby providing suitable current signals for equipment such as measuring instruments and protective devices. Widely applied in power systems for measurement, metering, protection, and monitoring, it effectively ensures the safe and stable operation of power systems.

Functions.

1.1 Current measurement

       ≡ Universal for high/low voltage systems

       Directly measuring high currents in either high-voltage or low-voltage circuits is hazardous. Three-phase current transformer (CT) can proportionally step down high voltages or large currents to low-voltage or currents, enabling safe and accurate measurements. For example, in a 10 kV high-voltage distribution system, currents may reach hundreds or even thousands of amperes. By using a current transformer to convert these to a secondary current of 5A or 1A, standard ammeters can easily measure and display the values.

        ≡ Multi-Device compatibility

        The current transformer (CT) is compatible with various measurement instruments such as ammeter, power meter, and energy meter, providing them with appropriate current signals to accurately measure parameters like current, power, and energy in three-phase circuits. For example, in a factory's power distribution room, connecting the current transformer to an energy meter enables precise measurement of electricity consumption, offering a reliable basis for billing and cost settlement.

1.2 Protective relaying

       ≡ Fault current sensing

       When a short circuit or overload occurs in a power system, the current surges abruptly. The three-phase current transformer (CT) promptly and accurately transmits the fault current signal to protective relays, enabling them to act swiftly and trip the faulted circuit. This critical function safeguards the power system by isolating faults and ensuring its safe and stable operation

Features

1, High precision measurement

Utilizing high-quality iron core materials and advanced manufacturing processes, the current transformer ensures high accuracy in current conversion with minimal measurement errors. This provides reliable data support for precise metering and monitoring in power systems

2, Wide measurement range

To accommodate various application needs, the current transformer offers multiple range options. It can handle three-phase current measurements ranging from tens to thousands of amperes, meeting the operational requirements of diverse and complex power systems.

3, Good linearity

Within the rated current range, the output current maintains an excellent linear relationship with the input current. This ensures the accuracy and reliability of measurement results, effectively avoiding deviations caused by nonlinear errors

4, High insulation performance

Equipped with excellent insulation materials and structures, the device can withstand elevated voltages, effectively preventing safety hazards such as electrical leakage and short circuits. This ensures the safety of both operating personnel and equipment.

Technical Specification

(Custom configurations available upon request.)

Model No.	STW50	Insulation resistance	DC500V/1000MΩ /min
Measurement range	10In130In	Housing	ABS,Flame retardant grade 94-V0
Operating frequency	50400Hz	Bobbin	PBT
Rated output	10mA5A	Core	Nickel Steel or Nanocrystalline
Ratio error	&plusmn:0.1	Working temperature	-25° +75°
Phase error	&plusmn:10m	Ambient humidity	85
Dielectric strength	2.5KV/1mA/1min	Wiring Configuration	Terminal Type/Shielded Stranded Wire 1.5m

Company Profile

Who we are

ShenZhen StarWSN is a professional liquid level and water quality monitoring device company which established in 2016. We focusing on the application of smart sensing technology in drainage network and river level monitoring. The main product include wireless water level detector,wireless pressure sensor,river flow monitoring station and online water quality analyzer etc. The products are widely used in smart city, environmental protection, municipal, chemical, power, sewage treatment, 
emergency rescue and other fields.   
                                                           
The company fully implements the ISO9001 quality management system,passed over 20 types of reliability tests and certifications. With leading research and development capabilities for software and hardware. Committed to providing high-quality products and "one-stop" services to all the customers.

Packaging & Shipping

FAQ

Q: What's the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 30–45 days.

Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.

Q: Can I request a customized order?
A: Absolutely! We offer OEM and ODM service.

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.