EuroSMC LET-400 RD Primary Current Injection Test Set 

EuroSMC LET-400 RD Primary Current Injection Test Set

The LET-400-RD is designed to perform most of the primary tests that are necessary in substations commissioning. It allows to perform with sufficient power, all the primary current injections to test the proper function and wiring of all the elements that compose the protection and measuring section in a substation.
The regulation system is based on a continuously variable autotransformer (Variac) that supplies to a power transformer that delivers the high current outputs and isolate the main supply from the load. A built-in ammeter and a timer gives the information about the current value and the operation time of the relay or breaker under test.

APPLICATIONS

- Test of the I/T curve in primary current relays test.
- Primary injection tests.
- Test of measurement and protection transformers.
- In general, primary injection tests including the complete loop, such as current transformer cables, protective relays, and circuit breakers.

CHARACTERISTICS

- Permanent current up to 400A 1KVA in 4 Ranges.
- Built in digital ammeter 0.5% accuracy.
- Built in digital timer resolution 1 ms.
- Thermal and shortcircuit protection.