LD400 and LD400P

Product catalog summary

Overview: The LD400 and LD400P are versatile electronic DC loads designed for testing DC power sources like batteries and solar cells. They feature multiple operating modes and built-in transient generators, suitable for design labs and component testing.

Specifications: These devices support a voltage range of 0 to 80V and a current range of 0 to 80A, with continuous power dissipation of 400 watts at 28°C, and up to 600 watts for short-term use. They have a low minimum operating voltage of less than 1V at 40A, high resolution and accuracy, and a high-resolution backlit graphic LCD.

Operating Modes: The LD400 and LD400P offer constant current, resistance, conductance, voltage, and power modes, each with specific features for power source regulation and load simulation.

Transient Generator and Slew Rate: The built-in transient generator allows for variable frequency and duty cycle, with slew rate control for simulating complex load conditions.

Remote Control and Interfaces: The LD400P includes remote control via USB, RS-232, GPIB, and LAN interfaces, with the LAN interface being LXI compliant for system use.

Protection and Safety: Features include excess power protection, reverse polarity protection, and isolation voltage up to ±300Vdc, with a dropout voltage setting to protect power sources.

Additional Features: The devices offer thirty non-volatile memories, a current monitor output, and analog remote control for all modes.

Protection Mechanisms:

Power Levels: Operation levels set at 610W and 630W.
Protection Current: Input disabled if current exceeds limits; fault state at 92 Amps.
Protection Voltage: Input disabled if voltage exceeds limits; fault state at 106V, surge suppressors activate above 120V.
Temperature: Fault state if heatsink temperature exceeds safe levels.
Sense Error: Fault state if external voltage sense is more than 6V below internal sense.

General Specifications:

AC Input: 110V–120V or 220V–240V AC ±10%, 50/60Hz.
Power Consumption: Max 30VA, mains lead rating of 6A.
Operating Range: +5ºC to +40ºC, 20% to 80% RH.
Storage Range: –40ºC to +70ºC.
Environmental: Indoor use up to 2000m altitude, Pollution Degree 2.
Cooling: Variable speed fan with rear air exit.
Safety: Complies with EN61010-1 and EN61010-2-030.
EMC: Complies with EN61326.
Size and Weight: 130mm H x 212mm W x 435mm D, 5.7 kg.
Option: 19-inch rack mount kit available.

Specification Notes:

600 Watt Mode: Dynamic response not specified; slew rate and transient oscillator frequency range restricted.
Slew Rate Ranges: Theoretical slope of transition between levels.
Minimum Transition Time: Fastest transition using a benign battery source and low inductance connections.
Common Mode Capability: Tolerance for voltage drops in cables; monitor negative must connect to load negative circuit.
Accuracy: Specifications apply for 18°C – 28ºC at 50W load power after 30 minutes of operation.

Manufacturer Information: Thurlby Thandar Instruments Ltd., Glebe Road, Huntingdon, Cambridgeshire, PE29 7DR, United Kingdom. Contact: Tel: +44 1480 412451, Fax: +44 1480 450409, Email: [email protected], Web: www.tti-test.com

Catalog excerpts

AIM & THURLBY THANDAR INSTRUMENTSLD400 & LD400P LD400 DC Electronic Load -LevelA ; Level B 'Dropout --LEVELS'- Level A: 80.00 A Level B: 45.00 A Dropout! 0.00 V Mode ( Limits LEVEL SELECT Current Monitor Electronic DC Loads - 80A, 80V, 400W constant current, resistance, voltage and power transient generator, variable slew rate, soft start current monitor output, analogue remote control short term high power mode of up to 600 watts thirty non-volatile memories for complete settings USB, RS-232, GPIB and LAN interfaces (LD400P) aimtti.com aimtti.co.uk | aimtti.us

Open the catalog to page 1

► Versatile solution for testing dc power sources ► Constant current, resistance, conductance, voltage and power modes ► Wide voltage and current range, 0 to 80V and 0 to 80A ► 400 watts continuous dissipation at 28oC (360W at 40oC) ► 600 watts short-term dissipation (up to 60 seconds) ► Low minimum operating voltage of <1V at 40A ► High resolution and accuracy for level setting ► Built-in transient generator with variable slew ► Current monitor output for waveform viewing ► Variable drop-out voltage for battery testing ► High resolution backlit graphic LCD with soft key control ► Analog remote...

Open the catalog to page 2

Multiple modes of operation Imax Constant Current Constant current mode is used for load testing of normal voltage-source power supplies and for constant current discharge testing of batteries. This mode provides rapid measurement of power source regulation (V/I characteristics). Constant power mode simulates a load whose power consumption is independent of the applied voltage. This is true of many types of equipment that incorporate switch-mode regulators. This mode may be particularly suitable for testing power sources of portable devices such as Lithium-ion batteries. Constant Voltage Constant...

Open the catalog to page 3

LD400 & LD400P - Technical Specifications INPUT SPECIFICATIONS Maximum Input Ratings A INPUT BOA Man EWVMax s300V<lcmaxto4- CAUTION; 10PREVENT ELECTING SMOCK PISCOMNECT AC LINIi BEROHE KEMOVlWGCOVEFL SLE klAHUAL VOLTAGE RATING; II6V SETTING; IISVAC - ift'liOH; VOLTAGE SENSE SELECT LD400P - comprehensive bus remote control To meet a wide variety of needs, the LX400P adds a comprehensive array of digital bus interfaces. RS-232, USB, GPIB and LAN (Ethernet) with LXI support are all provided as standard. Each of the digital bus interfaces provides full control of and read-back of settings and status....

Open the catalog to page 4

METER SPECIFICATIONS Display Type: Measured Values Volts & Amps: Watt & Ohms: Voltage Accuracy: Current Accuracy: Scaling: Accuracy: Common Mode Rejection: AC Input: Power Consumption: Operating Range: Storage Range: Environmental: Cooling: Safety: EMC: Size: Weight: Option: DROPOUT VOLTAGE The load will cease to conduct if the applied voltage falls below the Dropout Voltage setting; active in all modes except Constant Voltage. The Dropout Voltage setting is also the threshold for the Slow Start facility and acts as an offset voltage in Constant Resistance mode. Setting Accuracy: ± 2% ± 20mV....

Open the catalog to page 5

LD400 and LD400P

LD400 and LD400P

Catalog excerpts

All TTI catalogs and technical brochures