Primary Current Injector
Primary Current Injector is a high-power testing device designed to simulate real-world electrical fault conditions for testing the performance and accuracy of protective relays, current transformers (CTs), and other protective equipment in power systems. It generates high primary current to ensure the correct operation of protection systems under fault conditions and is an essential piece of equipment for electrical debugging in industries requiring high-current testing. This device is widely used in power plants, substations, electrical manufacturing plants, research laboratories, and other facilities.
why choose us
Our company has been specializing in the production and manufacturing of frequency series resonance devices for 21 years, with a modern intelligent factory covering over 40,000 square meters and more than 100 automated production, manufacturing, assembly, and testing equipment. We have obtained CE certification and currently serve over 20,000 customers worldwide.
Quotation within 1 hour – Solution within 24 hours - Product demonstration available - Strict contract performance
On-time delivery - 12-month warranty – Optional extended warranty - Factory acceptance testing
Authorized calibration (optional) - Worldwide training support – Regular follow-up visits
Why Use a Primary Current Injector?
Verify Protective Relays – Ensures relays respond accurately to fault conditions.
Test Current Transformers (CTs) – Simulates high currents to validate CT performance.
Simulate Fault Conditions – Generates high currents to mimic real-world fault scenarios.
Calibration – Provides a reliable method for calibrating protective equipment.
Enhance System Reliability – Ensures the protection system activates correctly in actual fault events.
Our Product Advantages
Equipped with two ammeters for monitoring current magnitude and range.
Features a freely adjustable autotransformer for precise current control.
Indicator lights and button operation for easy and user-friendly control.
Integrated and detachable structure, making it easy to transport and move.
21 years professional Primary Current Injector manufacturer and supplier in china
standardized factory, best product quality, and cheap wholesale prices！！！
Working Principle
The Primary Current Injector simulates fault conditions by injecting a controlled high current into primary circuits such as relays or current transformers. The injected current replicates overloads, short circuits, or other fault conditions encountered in real systems. The device can generate both AC and DC currents, depending on testing requirements.
Testing Process
Preparation & Setup
Connect the Primary Current Injector to the device under test (e.g., relay or current transformer).
Set the desired current level, testing duration, and testing mode (e.g., AC/DC current, step injection, or continuous current).
Current Injection
The injector generates a high current and injects it into the system under test.
The test equipment (e.g., relays) will respond by activating or deactivating based on its settings (such as trip time and current threshold).
Monitoring & Verification
Monitor the response of the protective device or current transformer under test.
Ensure the CT or relay operates as expected when subjected to the test current.
Data Recording & Reporting
The test results are recorded for analysis and reporting.
The data helps verify whether the protection device functions correctly under fault conditions.
Applications of a Primary Current Injector
Protection Relay Testing – Verifies whether relays respond correctly to fault conditions and trip as per specifications.
Current Transformer (CT) Testing – Simulates high primary currents to test CT accuracy and ensure they properly step down the current for protective relays.
Calibration – Ensures that relays and other protective systems are properly calibrated to respond correctly to fault currents.
Maintenance & Troubleshooting – Used for diagnosing and maintaining protection systems to ensure they function correctly.
Fault Simulation – Simulates real-world faults (e.g., short circuits, overloads) to verify protection system performance.
Other Names for a Primary Current Injector
Primary Current Injection Tester
High Current Tester
Current Injection Tester
Relay Test Set
CT Testing Device
Protective Relay Injector
High Current Testing Equipment
High Current Testing Device
As one of the leading primary current injector manufacturers and suppliers in China, we warmly welcome you to buy high-grade primary current injector made in China here from our factory. For price consultation, contact us.