8/12/2019 EuroSMCLET-400-RDC[1]

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Primary Injection Set

LET-400-RDC

8/12/2019 EuroSMCLET-400-RDC[1]

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LET-400-RDCMAIN FEATURES

Permanent current up to 400A 1 kVA in 4 ranges. Built in digital ammeter 0.5% accuracy. Built in digital timer resolution 1 ms. Thermal and shortcircuit protection. Variable AC and DC voltage up to 220V. Variable auxiliary DC power supply up to 220V.

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 ca-bles, protective relays, and circuit breakers.

DESCRIPTION The LET-400-RDC is designed to perform most of the primary tests thatare necessary in substations commissioning. It allows to perform withsufficient power, all the primary current injections to test the properfunction 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 autotrans-former (Variac) that supplies to a power transformer that delivers thehigh current outputs and isolate the main supply from the load. A built-in ammeter and a timer gives the information about the current valueand the operation time of the relay or breaker under test.

FEATURESPower outputs There are four different current outputs: 0 - 10A 0 - 100V 0 - 50A 0 - 20V 0 - 200A 0 - 5V 0 - 400A 0 - 2.5VTimerIn the control and regulation unit there is a timer installed that can workwith dry signals or with voltage signals the timer can measure in CY-CLES as well it is an autorange, 5-digit digital timer with the followingmeasuring ranges: 00.001- 99.999 s 99.999 - 999.99 s 999.99 - 9999.9 s 9999.9 - 99999 s

Ammeter/Voltmeter Installed in the control and regulation unit it is a digital instrument of

4 digits. The accuracy is 0.5% of the reading 1 digit.Protections The equipment is protected by thermal and shortcircuit magnetic relays.The outputs are also thermal protected to avoid excess in the duty cy-cle. Once this protection trips the connection of the output is not possi-ble until the thermal element detects that the temperature drops to anacceptable and safe level.

STANDARD ACCESORIES 2 test leads of 95 mm2 section, 2 meters length. 2 timer connection leads, 2 meters length. 2 crocrodile clips. Spare fuses.

Instruction manual. 1 nylon protection bag.

TECHNICAL SPECIFICATION

EUROSMC, S.A.Polgono Industrial P-29, Calle Buril, 69. 28400 Collado-Villalba. Madrid (Spain). Tels: 34 - 91 - 849 89 80*. Fax: 34 - 91 - 851 25 53

www.eurosmc.com e-mail: sales@eurosmc.com

VOLTAGE OUTPUTSVoltage Outputs: VOLTAGE CURRENT

0-220V AC: 220V 4 A0-220V DC: 220V 4 A

Auxiliary DC Voltage Supply:0-50V DC: 0-50V 1 A

0-110V DC: 50V-110V 0.5 A0-220V DC: 110V-220V 0.25 A

DUTY CYCLEMax. Max. Max. Max. Max. Max. Open

Continuous Current Current Current Current Current CircuitCurrent 60 min 15 min 3 min 1 min 1 s Voltage

400 A 600 A 800 A 1,100 A 1,400 A 2.5 kA 3.45V

200 A 350 A 400 A 550 A 700 A 1.5 kA 6.90V

50 A 175 A 100 A 138 A 175 A 325 A 27.5V

10 A 25 A 20 A 27.5 A 35 A 65 A 138V

Cooling Time* 15 min. 20 min. 20 min. 30 min

*Guaranteed values at ambient temperature < 25C

GENERALControl: Manual

Voltage supply:230 V 10%, 50-60 HzOperation Temperature:0 - 55 C

Case: Robust enamalled steelWeight: 25 kg

Dimensions:Height: 460 mm / 18 Width: 370 mm / 15 Depth: 250 mm / 10

Other similar equipment

LET-400-RDHas exactly the same characteristics as the LET-400-RDC but does not have anauxiliary DC voltage power supply nor an AC and DC voltage output.

BUILT-IN TIMERMeasuring Ranges:Time: 0.001 a 99999 s. (autorange)

Cycles: 000.1 a 9999.9 Cycles (referenced frequency)Accuracy: 0.003% of the reading 1 dig.

Time Start: By activation/deactivation of the power output.Timer Stop: Selectable between activation or deactivation

of the Signal Monitor.

SIGNAL MONITORDry Contact Input: Open circuit voltage: 10.2 V DC

Short-circuit current: 25 mA. Fuse protected.

Voltage Input: Level Limits: from 5 to 250 V AC/DC Input Impedance: 19 k Fuse protected.

Power Parameters83 Northern RoadWest Heidelberg 3081Victoria, Australiaemail: power@parameters.com.auwww.parameters.com.au