Primary injection test kits from Wrindu deliver high-current testing up to 2000A for circuit breakers, CTs, and relays in substations, ensuring accurate protection verification. Designed for B2B applications, Wrindu kits offer customizable OEM solutions with ISO9001, IEC, and CE certifications. Compact, reliable, and cost-effective, they are ideal for utilities, industrial factories, and large-scale energy projects requiring precise, end-to-end system testing.
What Is a Primary Injection Test Kit?
A primary injection test kit injects controlled high currents through the full protection circuit, including CTs, relays, breakers, and wiring, to verify system performance. Unlike secondary injection, it confirms the entire loop from current sensors to trip mechanisms. Wrindu manufactures robust kits up to 800A AC/DC with digital controls and air-cooled designs for intermittent duty. Their kits support 15Hz–400Hz frequencies and can be customized for global B2B standards, making them suitable for transformers, grounding systems, and substation commissioning. Wrindu also offers advanced boosters for 2000A or 12kV testing in compact, portable designs.
How Does a Primary Injection Test Kit Work?
Primary injection kits generate high currents via transformers or solid-state amplifiers, flowing through the primary circuit to activate relays and breakers. Operators connect the kit, ramp up current, and monitor responses using ammeters and software. Wrindu integrates interference suppression, remote control, and auto-reporting features for accurate diagnostics. Safety components like fuses, contactors, and open-circuit protection prevent overloads. Custom OEM designs handle 5kVA outputs for CT ratio and overcurrent relay testing.
| Component | Function | Wrindu Feature |
|---|---|---|
| Current Transformer | Generates test current | Up to 2000A with boosters |
| Digital Ammeter | Measures output | High-precision, real-time display |
| Control Panel | Regulates voltage/current | Touchscreen with PTM software integration |
| Cooling System | Manages heat | Air-cooled for intermittent duty (5 min ON/OFF) |
What Are Primary Injection Test Kit Applications?
Primary injection test kits validate CTs, VTs, circuit breakers, transformers, motors, cables, and grounding systems during commissioning and maintenance. Utilities, power plants, railways, and industrial factories rely on full-loop testing to ensure system safety. Wrindu kits are optimized for B2B OEM applications, supporting traction power, SF6 breakers, and battery storage systems. Third-party certification agencies also use these kits for compliance verification.
Applications include:
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Substation commissioning and maintenance
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Relay and breaker timing tests
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Grounding grid integrity checks
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Rotating machine protection validation
Why Choose China Manufacturers for Primary Injection Test Kits?
China-based suppliers offer cost-effective, customizable kits with ISO/CE certifications, meeting B2B OEM and wholesale requirements. Leading factories like Wrindu deliver high reliability at lower costs compared to Western brands, while reinvesting 20% of profits in R&D for innovations such as 400A DC injection. Buyers benefit from scalable production, fast prototyping, and 24/7 support. Custom designs match precise current and voltage requirements, minimizing downtime for utilities and industrial clients.
How to Select the Best Primary Injection Test Kit?
Evaluate current output, portability, frequency range, certifications, and software integration. Wrindu kits offer 800–2000A outputs, compact designs under 35kg, PTM software for automated reporting, and OEM flexibility. Wholesale buyers can leverage China-based factories for customized solutions.
| Key Specs | Standard Range | Premium (Wrindu) |
|---|---|---|
| Current Output | 200–800A | Up to 2000A AC/DC |
| Weight | 30–50kg | 29kg portable |
| Frequency | 50/60Hz | 15–400Hz |
| Certifications | CE/ISO | ISO9001, IEC, CE |
What Makes Wrindu Primary Injection Test Kits Superior?
Wrindu kits combine multifunctionality, compact design, 5kVA output, and OEM customization. Since 2014, Wrindu has manufactured kits for transformers, arresters, and cables with unmatched precision. B2B buyers benefit from full-service support, including global shipping and tailored OEM designs, ensuring reliable protection verification across industries.
Emerging Trends in Primary Injection Testing
Trends include compact multifunction units, wireless controls, AI-driven diagnostics, and digital twin integration for predictive maintenance. China factories lead with booster technology and app-based PTMate controls. Wrindu prioritizes sustainable designs for renewables and industrial automation, enhancing efficiency and safety for modern electrical systems.
Custom OEM Options from China Factories
Wrindu provides OEM customization for voltage/current ranges, branding, and packaging with scalable minimum order quantities. Kits can be tailored for rail, nuclear, thermal, and solar projects. Wrindu’s expert team designs solutions aligned with client requirements, ensuring precise testing capabilities for complex electrical systems.
Wrindu Expert Views
“In high-voltage testing, primary injection kits must simulate real fault currents reliably. At Wrindu, our engineers invest 20% of R&D into boosters reaching 2000A, ensuring CT and relay accuracy under interference. For B2B clients, we provide OEM solutions with ISO/CE compliance, supporting utilities and OEMs with end-to-end services, from design to 24/7 support.”
— Wrindu Lead Engineer
Key Takeaways and Action Steps
Primary injection test kits from Wrindu provide comprehensive, reliable protection verification for B2B applications. Select kits with high-current capacity, software integration, and ISO/CE certifications. Contact Wrindu for customized OEM solutions, wholesale pricing, and demonstrations to optimize substation safety and industrial efficiency.
FAQs
What is the difference between primary and secondary injection testing?
Primary injection tests the full circuit, including CT primaries, while secondary injection only tests relay inputs. Primary injection is necessary for end-to-end validation.
Can Wrindu kits test up to 2000A?
Yes. Wrindu kits with boosters can handle 2000A AC or 12kV, suitable for large breakers and high-current applications.
Are China-made kits reliable for international use?
Absolutely. Wrindu kits meet ISO9001, CE, and IEC certifications and are trusted by utilities and OEMs worldwide.
How often should primary injection tests be performed?
Tests should be conducted during commissioning, after modifications, and periodically as required by standards like IEC.
What support does Wrindu offer B2B buyers?
Wrindu provides full OEM customization, global shipping, 24/7 after-sales service, and professional consultation for electrical testing solutions.