T&R 750ADM MK4 Primary Current Injection Test Set
Reliable primary current testing is essential for protection systems and circuit breaker verification. The T&R 750ADM MK4 Primary Current Injection Test Set delivers a compact yet powerful solution capable of producing currents up to 750A AC. As a result, engineers can perform demanding primary injection tests using a portable and dependable system.
Designed for flexibility, the T&R 750ADM MK4 supports a wide range of testing tasks across power protection equipment. It operates with dual outputs that allow current injection from a few hundred milliamps up to full output levels. In addition, the system offers true RMS metering with fast capture performance, ensuring accurate measurement of a single electrical cycle.
Accurate Metering and Flexible Timing
Precise measurement plays a key role during protection testing. Therefore, the unit includes four true RMS metering ranges so the meter scale and trip level can be set independently from the selected output. Capture time is less than 20 ms, which allows the RMS value of a single cycle to be measured with high confidence.
Furthermore, a flexible timing system measures trip, reset and reclose times with strong accuracy. Two contact inputs allow triggering through volt-free contacts or DC voltage signals. Because the inputs automatically detect normally open and normally closed contacts, the T&R 750ADM MK4 simplifies setup and reduces testing time.
Designed for Field Testing
Engineers often require a system that is both robust and portable. For this reason, the T&R 750ADM MK4 Primary Current Injection Test Set uses durable connectors and protective circuitry for safe operation. Electronic overcurrent protection and thermal trip protection help protect the equipment during demanding tests.
In practical use, this test set supports circuit breaker checks, relay testing and CT ratio measurements. The clear LCD display and simple interface help users work quickly in the field. Automatic mains voltage selection also improves convenience when the equipment is used in different locations.
Key Features
- Primary current injection capability reaching up to 750A AC output
- Dual output design supports flexible testing across different loads
- True RMS digital metering provides accurate electrical measurement
- Single cycle capture allows fast and precise RMS analysis
- Multi function timing system supports relay and breaker testing
- Large back lit LCD display improves visibility in field conditions
- Electronic overcurrent protection safeguards the equipment
- Thermal trip protection helps prevent overheating during tests
- Automatic switch off activates when the test sequence finishes
- Compact portable construction simplifies transport to site locations
- Automatic mains voltage selection supports varied supply systems
- Clear user interface allows straightforward operation in the field
Technical Specifications
| Manufacturer | T&R Test Equipment |
| Product name | T&R 750ADM MK4 Primary Current Injection Test Set |
| Manufacturer part code | 750ADM MK4 260P |
| Primary current output | Up to 750A AC injection |
| Secondary injection output | 16V 40A output for high impedance trips |
| Low voltage output | 4V output for primary injection operation |
| Metering type | True RMS digital metering with four measurement ranges |
| Measurement capture time | Less than 20 milliseconds single cycle RMS capture |
| Timing system | Multi function timer measuring trip, reset and reclose times |
| Contact inputs | Two inputs triggered by volt free contact or DC voltage |
| Contact detection | Automatic detection for normally open and normally closed contacts |
| Protection systems | Electronic overcurrent protection and thermal trip protection |
| Display | Large back lit liquid crystal display |
| Automatic mains selection | Automatic voltage selection for flexible operation |
| Metal case weight | 23.5 kg |
| Metal case dimensions | 380 x 314 x 221 mm |
| Pelican case weight | 27.4 kg |
| Pelican case dimensions | 560 x 456 x 265 mm |
Comparison Table
| Unit type | Maximum power rating | Maximum current |
| 750ADM-H | 3 kVA | 750A for 20 seconds |
| PCU1-SP + NLU5000 | 11.5 kVA | 5000A for 40 seconds |
| PCU2/E + LU6000 | 20 kVA | 6000A for 5 minutes |
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