A current injection test kit is a portable device designed to deliver high currents into power systems, enabling precise testing of protective relays, circuit breakers, and current transformers (CTs) under simulated fault conditions. Wrindu, a leading Chinese manufacturer, provides OEM, wholesale, and custom kits with ±0.5% accuracy, 2KVA capacity, and integrated timers, ensuring safe and reliable diagnostics for B2B power applications.
What Does a Current Injection Test Kit Do?
Current injection test kits verify the performance of relays, breakers, and CTs by injecting controlled high currents without de-energizing the system. They measure primary and secondary currents, voltages, and timing with precision. Wrindu kits feature toroidal transformers and ARM chip controls, offering smooth outputs with less than 5% waveform distortion. AC/DC outputs up to 250A allow accurate fault simulation, and factory-direct units include LCD screens, RS232 interfaces, and overload protection, supporting thermal device testing and contact resistance checks.
How Does a Primary Current Injection Test Kit Work?
Primary injection kits use large-capacity transformers powered by 220V AC to deliver adjustable currents. A microprocessor-based control unit regulates output, displaying real-time values on LCD screens. After connecting to the test point, the current ramps to simulate faults while breaker response is timed. Wrindu kits include true RMS metering (±0.2% accuracy) and dual protection for safe operation. Durations can be customized to match client requirements.
| Key Components | Function | Wrindu Specs |
|---|---|---|
| Control Unit | Regulates output | ARM chip, LCD 320×240 |
| Transformer | Generates current | 2KVA toroidal |
| Metering | Measures values | ±0.5% primary current |
| Timer | Tracks duration | 0-99999s, 0.1ms resolution |
This compact design (340x270x250mm, 22.5kg) is ideal for field use by B2B power professionals.
What Are the Main Applications of Current Injection Test Kits?
Current injection test kits are used in substations, power plants, and industrial systems to test circuit breakers, relays, and thermal overloads by injecting fault currents. They ensure protection schemes operate correctly and safely. Wrindu provides customized solutions for utilities, OEMs, and battery manufacturers. Common applications include CT saturation tests, railway traction systems, and switchgear contact resistance checks.
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Power grid maintenance for breaker timing
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Relay calibration in hydro and solar plants
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Contact resistance measurement in switchgear
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Fault simulation in nuclear facilities
Why Choose a China Manufacturer for Current Injection Test Kits?
China-based manufacturers like Wrindu provide high-quality kits at competitive prices with flexible OEM options and fast delivery. Wrindu invests 20% of annual profits in R&D to ensure cutting-edge designs. ISO9001-certified production guarantees ±0.5% accuracy and durable operation in extreme conditions (-10°C to 50°C). Factory-direct pricing can reduce costs by 30–50% for bulk B2B orders, with comprehensive support and customization options.
How to Select the Best Current Injection Test Kit?
Key selection factors include output range (200–5500A), accuracy (±0.5%), capacity (2–25KVA), portability, and integrated protection features. Wrindu models, such as TEST-200 (250A) and higher-capacity units (up to 3000A+), are tailored for specific industries including energy storage. Duty cycles, continuous vs. short-duration currents, and interface options should guide purchasing decisions.
| Model Comparison | Max Current | Capacity | Weight | Structure |
|---|---|---|---|---|
| Wrindu TEST-200 | 250A | 2KVA | 22.5kg | Integrated |
| Standard 901 | 1100A | 5KVA | 25kg | Integrated |
| Advanced 905 | 5500A | 25KVA | 123kg | Fission |
What Features Make Wrindu Test Kits Stand Out?
Wrindu kits offer 32-bit ARM control, dual overload protection, and multi-range digital timers for precise testing. AC/DC outputs reach 300V with 0.1A resolution. RS232 interfaces enable data logging, and tropicalized designs ensure global reliability. B2B clients benefit from OEM customization and high-precision operation trusted by grid operators and industrial OEMs worldwide.
Wrindu Expert Views
“Primary current injection test kits are essential for verifying relay and breaker performance under realistic fault conditions. Wrindu leverages advanced toroidal transformers and microprocessor-based controls to deliver accurate, low-distortion outputs. Our kits combine OEM flexibility, robust safety features, and global compliance, empowering utilities, industrial plants, and research institutions to maintain operational reliability efficiently.” – Wrindu Engineering Lead
How to Maintain Your Current Injection Test Kit?
Maintain accuracy with annual meter calibration, clean connectors, and storage at 5–95% humidity. Inspect cables after frequent use. Wrindu provides 24/7 support, firmware updates, and maintenance kits to extend operational life beyond 10 years in high-demand environments.
Conclusion
Wrindu current injection test kits provide precise, safe, and versatile solutions for B2B power systems. Key takeaways: prioritize high accuracy, durable design, and customization options. Actionable advice: consult Wrindu for OEM solutions, bulk orders, and tailored kits to optimize electrical diagnostics and system reliability.
FAQs
What is the difference between primary and secondary injection testing?
Primary testing injects high currents through the full CT loop; secondary uses lower currents after the CT. Wrindu kits support both methods for comprehensive system verification.
Can Wrindu customize current injection test kits?
Yes. Wrindu offers OEM customization of outputs, voltages, and interfaces for utilities and manufacturers. Orders start at wholesale volumes.
How accurate are Wrindu’s current outputs?
Primary current accuracy is ±0.5% with less than 5% waveform distortion, ideal for precise relay and breaker testing.
Which industries benefit most from Wrindu kits?
Power grids, substations, renewable energy, railways, and battery manufacturers rely on these kits for fault diagnostics and system verification.
Is training provided with Wrindu kits?
Yes. Wrindu offers consultation, manuals, and ongoing support directly from their Shanghai factory.