ELC ALR3003D DC Power Supply Instruction Manual

: June 16, 2024
: ELC

ELC ALR3003D DC Power Supply

Product Information
The ALR3003D is a DC Power Supply with dual outputs, labeled as A – Master and B – Slave. It has a voltage range of 0 – 30V and a current range of 0 – 3A. The power supply is designed with fine regulation capabilities and offers tracking series functionality. Made in France, the ALR3003D is a reliable and efficient power supply that is suitable for various applications.

Specifications

Model: ALR3003D
Voltage Range: 0 – 30V
Current Range: 0 – 3A
Power Supply Outputs: A – Master, B – Slave
Voltage Regulation: Fine
Series Voltage Range: 0 – 60V
Tracking Series Functionality

Product Usage Instructions

Preliminary Instructions
Make sure to read and understand the user manual before operating the ALR3003D DC Power Supply.

Unpacking and Setup
Follow these steps to unpack and set up the power supply:

Remove all packaging materials.
Inspect the power supply for any visible damage.
Place the power supply on a stable and flat surface.

Preparation for Operation
Before using the ALR3003D, perform the following preparations:

Ensure the power supply is connected to a grounded electrical outlet.
Check that the voltage and current settings are appropriate for your application.
Make sure all necessary cables and connections are in place.

Usage Instructions

Safety Precautions
Follow these safety precautions while using the ALR3003D:

Do not operate the power supply in wet or humid conditions.
Avoid exposing the power supply to extreme temperatures.
Keep the power supply away from flammable materials.
Do not use the power supply if it is damaged or shows signs of malfunction.

Control Panel
The ALR3003D power supply features the following control panel:

U (Voltage) Control Knob: Adjusts the output voltage.
I (Current) Control Knob: Adjusts the output current.

Measurement Preparation
Before taking measurements, perform the following steps:

Connect the load or device to be powered to the appropriate output terminals (A – Master or B – Slave).
Set the desired voltage and current levels using the U and I control knobs.

Applications
The ALR3003D DC Power Supply can be used in various applications, including:

Electronics prototyping and testing.
Laboratory experiments and research.
Industrial automation and control systems.

FAQ

Q: What is the voltage range of the ALR3003D power supply?
A: The voltage range is 0 – 30V.

Q: Can I connect multiple devices to the A – Master and B -Slave outputs simultaneously?
A: Yes, you can connect multiple devices to each output simultaneously as long as the total current does not exceed 3A.

Q: Is the ALR3003D power supply suitable for high-precision applications?
A: Yes, the power supply offers fine regulation capabilities for precise voltage and current control.

PRELIMINARY INFORMATION

Manufacturer : elc 59, avenue des Romains 74000 ANNECY – FRANCE
Phone : +33 (0)4 50 57 30 46 Fax: +33 (0)4 50 57 45 19
Instrument : STABILIZED POWER SUPPLY
Trademark : elc
Type : ALR3003D

DESCRIPTION

INTRODUCTION
You just bought a POWER SUPPLY type elc ALR3003D. We thank you and congratulate you for your good choice. The elc company proposes a wide range of POWER SUPPLIES and many other electronic test instruments: LF AND FUNCTION GENERATORS, FREQUENCY METER, PANEL METERS… This instrument has been conceived according to the European standard EN 61010-1 and supplied in good condition. This electrical instrument is intended for professionals, industrials, and educative use. This instructions manual contains information and notes, which must be respected by the purchaser, in order to ensure safe working and to maintain the instrument in good condition.

FUNCTIONS OF THE INSTRUMENT
This practical instrument, to be used in the laboratory, will give you satisfaction in all uses. Two power supplies (A and B or Master and Slave) deliver each 0 to 30V and 0 to 3A in output. They can be coupled according to 2 modes: Separated: 2 x 0 to 30V and 0 to 3A Tracking / Series: ± 0 to 30V and 0 to 3A The output voltages and currents are displayed by 3 voltmeters and ammeters.

ACCESSORIES OF THE INSTRUMENT
Your power-supply ALR3003D is delivered with its mains cord and «EUROPE» bipolar plug + Earth and its instructions manual.

SYMBOLS AND DEFINITIONS
You will find the following symbols on the instruments :

CAUTION! RISK OF ELECTRIC SHOCK
EARTH TERMINAL
CAUTION! TO REFER TO THE MANUAL

TECHNICAL SPECIFICATIONS AT 230V AND 23°C

ELC-ALR3003D-DC -Power-Supply-FIG- 12

OTHER SPECIFICATIONS

Mains : 230V ± 10%, 50 / 60Hz
Mains input: «EUROPE» CEE 22 receptacle with bipolar cord + Earth
Powering: Bipolar light switch
Outputs: Safety terminals, VDE 0110 standard
Consumption: 360VA
Electric strength: 2300VAC between input and output
2300VAC between input and frame
100VDC between output and frame
Noise level: 46dB (A) maxi
Dimensions : L=285mm H=151mm D=225mm
Casing: Polycarbonate front face silk-screen printed amber-colored case
Weight: 6.11kg
Condition of use: +5°C to +40°C
Condition of storage : -10°C to +50°C
Condition of humidity: see diagram.

PROTECTIONS
Safety class: I Against short-circuit, by current limiting.
Against excessive temperature rises

by temperature-controlled ventilation
by thermal circuit-breaker, built in the transformer
by relay switching the secondary windings of the transformer

Against any overcurrent in the transformer

by time-delay fuse 2.5A 5×20 on the primary winding (accessible on the back side).
by fast fuse F5A 5×20 on the secondary winding (inside the instrument).

STANDARDS
EMC: EN 55011 group 1 – class B EN 61326-1 performance criterion B

SAFETY
EN 61010-1, overvoltage category II, and pollution degree 2.

WORKING PRINCIPLE

REMINDER ABOUT THE RECTANGULAR CHARACTERISTIC
A power supply able to work at constant voltage or current is called rectangular characteristic (Fig. 1). The change from «constant voltage» working to «constant current» working is automatic according to the adjustments of Vs and Is and to the load applied at the output. If the RL load resistance is higher than the ratio Vs/Is, the power supply works at constant voltage for the value of the selected output voltage and with current limiting to Is. If RL varies from the infinite to Vs/Is, I can vary from 0 to Is (I1 example) and the output voltage is constant. For the power supply to be able to work at constant voltage, the output current must be lower than the selected limit current. In the contrary case, the power supply changes over to the «constant current working.

If the RL load resistance is lower than the ratio Vs/ Is, the power supply works at constant current, for a current value selected and with a voltage limiting to Vs. If RL varies from 0 to Vs/Is, V can vary from 0 to Vs, and Is = constant (V1 example). For the power supply to be able to work at constant current, the output voltage has to be set at the maximum of the specified values; and the limit current has to be set by an appropriate adjustment on acting on the Icc function. Caution! when the output limit voltage and current are set, so that the load resistance is equal to the ratio Vs/Is, a working instability can occur.

CONSPECTUS OF THE DIFFERENT MODES

Separated Mode
The 2 power supplies are independent and deliver each a voltage adjustable from 0 to 30V and a current adjustable from 0 to 3A.

Tracking Mode
This mode allows to delivery of 2 symmetrical voltages in relation to the middle point formed by the negative terminal of the Master power supply “A” and the positive terminal of the Slave power supply “B”. The regulation of the slave voltage is driven by the master one. The current setting remains independent and adjustable from 0 to 3A for each power supply.

Series Mode
It allows to adjust the power supply from 0 to 60V with a current from 0 to 3A. The voltage regulation of the Slave power supply “B” is driven from the Master one “A”.

Parallel Mode
It allows to adjust the power supply from 0 to 30V with a current from 0 to 6A. Connection is made outside by cables. To regulate the same tension on each power supply at about 0.1V, before the connection.

PRELIMINARY INSTRUCTIONS

PACKAGING
During its transport, the power supply is protected by a «Bull-pack» wrapping and placed in a cardboard box avoiding any damage. Keep this material, you may use it later on. Packing list :

1 instruction manual
1 «Bull-pack» wrapping
1 cardboard wrapping
1 Power supply: ALR3003D
1 cardboard packing piece

MOUNTING AND PLACING OF THE INSTRUMENT
For natural and correct cooling, the power supply must stand on its four rubber thrusts and all ventilation openings must be widely cleared. To connect the mains cord in the «EUROPE» CEE22 receptacle at the rear of the instrument.

BEFORE USE

To connect the p. supply to mains (230V) and to switch on with the «On/Off» switch.

INSTRUCTIONS FOR USE

SAFETY INSTRUCTIONS
Any intervention inside the casing, and particularly the replacement of the fuse, must imperatively be affected by skilled staff. The instrument must be used according to the instructions in this manual. The plug of the mains cord being used as the switch-off device, the instrument must be connected to a socket easily accessible, which has an earth connection. When this instrument has to be powered using a separated autotransformer in order to get a voltage reduction, make sure that the common terminal is connected to the pole earthed of the feeding circuit. The common mode voltage between Earth and output terminals shall not exceed 50V rms. In this case, a voltage judged dangerous (>60Vdc) can be reached between one of the terminals and Earth. In series or tracking mode, a voltage of 60V (judged dangerous) can be available between the positive terminal of the Master power supply and the negative one of the Slave power supply. In these cases, it is necessary to use safety cords for the connection to the instrument’s outputs. Moreover, the instruments connected mustn’t give access to conductive parts.

Description of the instrument’s rear panel

A MAINS RECEPTACLE
B TIME-DELAY FUSE 3.15A The time-delay fuse (5x20mm 2.5A) can be replaced by a fuse of the same type and features.

CONTROLS

Controls description of the front panel

«ON / OFF» SWITCH
VOLTAGE DISPLAY
VOLTAGE DISPLAY
CURRENT DISPLAY
CURRENT DISPLAY
VOLTAGE ADJUSTMENT
VOLTAGE FINE ADJUSTMENT
VOLTAGE ADJUSTMENT
VOLTAGE FINE ADJUSTMENT
CURRENT ADJUSTMENT
CURRENT ADJUSTMENT
VOLTAGE REGULATION CONTROL
VOLTAGE REGULATION CONTROL
CURRENT REGULATION CONTROL
CURRENT REGULATION CONTROL
SELECTION OF THE TRACKING / SERIES MODE
TRACKING / SERIES MODE CONTROL
POSITIVE TERMINAL
POSITIVE TERMINAL
FUNCTIONAL EARTH TERMINAL
NEGATIVE TERMINAL
NEGATIVE TERMINAL

Description of the operating controls

(1) ON-OFF SWITCH
The lighting bipolar switch shows that the power supply is on.

(20) FUNCTIONAL EARTH TERMINAL
Directly earthed from the frame. Allows you to take the earth as a reference for your mounting. This connection is not aimed to ensure the continuity of the protective conductor. SEPARATED MODE of the A and B power-supplies

(7) SELECTION OF THE SEPARATED MODE
Allows the independent working of the A and B power supplies.

(6) (8) VOLTAGE ADJUSTMENT
Allows the adjustment of a voltage between 0 and 30V.

(7) (9) VOLTAGE FINE ADJUSTMENT
Makes the voltage adjusted by (6) (31) vary by about 2V.

(12) (13) VOLTAGE REGULATION CONTROL
The lighting green LED shows that the power supply works in voltage regulation.

(2) (3) VOLTAGE DISPLAY
Allows to read the voltage from 0 to 30V with a 100mV resolution.

(10) (11) CURRENT ADJUSTMENT
Allows to adjust a current between 0 and 3A.

(14) (15) CURRENT REGULATION CONTROL
The lighting red LED shows that the power supply works according to the current regulation.

(4) (5) CURRENT DISPLAY
Allows to read the current from 0 to 3A with a 10mA resolution.

(18) (19)POSITIVE TERMINAL

(21) (22)NEGATIVE TERMINAL

Components of the A power-supply : (2) (4) (6) (7) (10) (12) (14) (18) (21)
Components of the B power-supply : (3) (5) (18) (8) (9) (11) (13) (15) (19) (22)

TRACKING / SERIES MODE of the Master and Slave power-supplies

(16) SELECTION OF THE TRACKING / SERIES MODE
The tracking mode allows one to get, between the (18) (21) and (19) (22) terminals, two identical, but opposed, voltages from 0 to 30V.

21) (19)POSITIVE and NEGATIVE TERMINALS
These terminals, connected internally, are the middle point of the tracking power supply.

(18) POSITIVE TERMINAL

22) NEGATIVE TERMINAL

(6) VOLTAGE ADJUSTMENT
Allows to adjust symmetrically a voltage between 0 and 30V.

(7) VOLTAGE FINE ADJUSTMENT
Makes the voltage adjusted by (6) vary symmetrically from 0 to 2V.

(12) (13) VOLTAGE REGULATION CONTROL
The lighting green LED shows that the power supply works in voltage regulation.

(2) (3) VOLTAGE DISPLAY
Allows to read the voltage from 0 to 30V with a 100mV resolution.

(3) (27) CURRENT ADJUSTMENT
Allows to adjust a current between 0 and 3A.

(10) (11)SELECTION OF THE SHORT-CIRCUIT
In standby mode only and used jointly with (3) (27), allows the adjustment of the output maximum current.

(14) (15) CURRENT REGULATION CONTROL
The lighting red LED shows that the power supply works according to the current regulation.

(4) (5) CURRENT DISPLAY
Allows to read the current from 0 to 3A with a 10mA resolution.
CAUTION (8) (9) are inactive.

BEFORE MEASURING

A and B power supplies or Master and Slave
Use at constant voltage

To choose the mode needed: Separated, Tracking.
To set the current at the maximum value.
To set the voltage at the value needed.
To connect the load to the terminals corresponding to the mode.
To activate the standby mode, in order to connect the load.
To check the voltage regulation: light green LED.

Use at constant current

To choose the mode needed: Separated, Tracking.
To set the voltage at the maximum value.
To choose the working current, with the short-circuit and the setting.
To connect the load to the terminals corresponding to the mode.
To activate the standby mode, in order to connect the load.
To check the current regulation: lighting red LED.

Cautions
Before applying the load, always set the power supply. To connect the load using insulated leads with sufficient diameter. Disconnect the load before switching off the power supply. To keep the instrument away from dust. Any interruption of the protective conductor outside the casing may render the instrument dangerous. Intentional interruption is forbidden.

APPLICATIONS

As outputs are floating, within the limits of the common mode voltage, the reference is given by the mounting diagram (Fig. 2). The power supply can deliver a positive or negative voltage.

MAINTENANCE

No particular maintenance is required for this instrument. To avoid dust, humidity, and shocks; your instrument will appreciate it. For the cleaning, please use a smooth duster. If indicators do not light up on switching on, to check: That the ON/OFF switch is pressed The mains voltage The connection to the mains The protective fuse (5x20mm T2.5A).

AFTER-SALES SERVICE

The after sales Service is ensured by the each company. During two years, spare parts and workmanship are guaranteed. This guarantee does not apply to instruments presenting defects or faults caused by improper use (wrong mains voltage, shocks …) or which have been repaired outside our factory or the repair shops of our authorized agencies.

EU DECLARATION OF CONFORMITY

Manufacturer: lc
Address: 59, av. des Romains – 74000 Annecy – France

declares the product

Name: Stabilized power supply
Number: ALR3003D

conformable to the requirements of the directives
Low voltage 2014/35/UE, Electromagnetic Compatibility 2014/30/UE and RoHs 2011/65/UE.

The following harmonized standards have been applied :

Safety: EN 61010-1:2010
EN 61558-2-4:2009 on the transformer
EMC : EN 61326-1:2013

Annecy, on February 07, 2022, H. CURRI Manager

ELIMINATION OF MANUFACTURING WASTES BY THE PRIVATE USERS IN THE EU

This symbol written on the product or on its packaging indicates that this product must not be thrown in the garbage with your other waste. It’s your responsibility to rid of your manufacturing waste by bringing it to a specialized sorting office for the recycling of electrical and electronic instruments. Collection and recycling of your waste will contribute to preserving natural resources and guarantee recycling respectful of the Environment and human health. For further information concerning the recycling center near your place of residence, contact your town hall, the elimination service of the garbage heap, or the store where you bought the instrument. For more details, go to: www.elc.fr