PRIMARY INJECTION TEST SETS - LETS

Product catalog summary

Description
The LET range is designed for test applications requiring high levels of AC or DC current, typically for primary current injection. Models offer power from 1,000 to 8,000 VA or Watt. Output voltage is adjusted via a variac, and current is measured with a digital ammeter. Multiple output taps allow for voltage range adaptation to load impedance, facilitating lower current adjustments while maintaining power. A digital chronometer measures activation time with 1-millisecond accuracy. Some models feature a motorized variac for greater separation between power output and control panel. Transformers can handle currents over 20,000 A, with thermal trip protection against overheating.

Applications
Used for commissioning and testing overcurrent protections, circuit breakers, thermal and motor protections, transformers, interconnections, and railway networks.

Common Characteristics

Manual control
3-meter power supply cord
Built-in digital ammeter (0.5% accuracy, not in LET-400)
Built-in digital timer (1 ms resolution, not in LET-400)
Automatic thermal trip protection
Operating temperature: 0 - 55ºC
Robust enamelled steel case
CE marking compliance

Signal Monitor

Dry Contact Input and Voltage Input
Open circuit voltage: 10.2 V DC
Short circuit current: 25 mA
Level limits: 5 to 250 V AC/DC

Built-in Timer

Time range: 0.001 to 99999 s
Accuracy: ±0.003% of reading ± 1 digit
Timer start/stop by power output activation/deactivation

Specifications
Various models (LET-400, LET-400-RD, LET-400-RDC, etc.) offer different features such as auxiliary AC/DC voltage outputs and measurement displays. Power ranges from 1,000 VA to 8,000 VA, with different duty cycles and maximum current capabilities. Units are supplied with test leads and are constructed for ease of transport.

Power Output
LET-4000-R is designed for high DC current injection, mainly in the railway industry, with a split module design for AC regulation and AC/DC conversion. It provides a 2 VAC, 8 kVA output adjustable by variac, converting to 2 Vdc with 8 kW power.

Catalog excerpts

Primary injection Equipment DESCRIPTION The LET range addresses test applications that require high levels of AC or DC current, typically primary current injection. The generation power of the various models ranges from 1,000 to 8,000 VA or Watt. The output voltage is adjusted by means of a variac at the primary winding of the output transformer. The injected current is measured and displayed by a built-in digital ammeter. We provide several output taps in order to better adapt the voltage range to the connected load’s impedance. This also makes adjustment of lower currents easier, while maintaining...

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<o£APHl| TLI’TE Additionally to the 4 current taps, the LET-400-RDC features auxiliary AC and DC voltage outputs, whereas the more economical LET-400 has no measurement displays. 15 min. 20 min. 20 min. 30 min. OFF (cool-down) time at 25°C / 77° F SPECIFICATIONS SPECIFICATIONS Power Supplied test leads Power supply Consumption Dimensions 2,000 VA 2 cables, 3 meter / 10 ft. length, 185 mm2 Single-phase 110/230 VAC (specify), 50-60 Hz 12.8A @ 220V 380 mm x 310 mm x 540 mm / 15 in.x 12 in.x 21 in. SPECIFICATIONS Power Supplied test leads Power supply Consumption Dimensions Weight (unit only) Weight...

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DUTY CYCLELET-2000-RD / 2000-RDM ON TIME/MAXIMUM CURRENT ON TIME/MAXIMUM CURRENT Tap No-load V Continuous 60 min. 15 min. 3 min. 1 min. 1 sec. The LET-2000-RD / 2000-RDM / 4000-RD / 4000-RDM units are constructed in two units for easier transportation. The RDM version replaces the traditional adjustment knob with a pair of push buttons that control a motorized variac for up- and down- regulation, for applications where a greater distance between the control board and the actual power output connections is required. LET-4000-R Please note: Due to the continuous research and development by EuroSMC,...

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PRIMARY INJECTION TEST SETS - LETS

PRIMARY INJECTION TEST SETS - LETS

Catalog excerpts

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