Safety instructions
Read the operating instructions carefully and especially observe the safety
information. If you do not follow the safety instructions and information
on proper handling in this manual, we assume no liability for any resulting
personal injury or damage to property. Such cases will invalidate the warranty/
guarantee.
• The laboratory power supply conforms with protection class I and is suited for
connection only to a grounded power outlet (230 V/AC, 50 Hz). Make sure that
the ground connection is not defective/interrupted as there is a risk of fatal injury
in case of malfunction.
• This product is not a toy, keep it out of the reach of children.
Children cannot recognize the dangers that may arise when handling electrical
devices. Children may alter settings or insert objects into the air vents on the lab
power supply. This poses a risk of fatal injury due to electric shock! Always use the
product out of the reach of children.
• Do not leave packaging material lying around carelessly. These may become dan-
gerous playing material for children.
• The laboratory power supply may be set up and used only in dry, closed indoor
spaces. It may not become moist or wet. The power supply may not be exposed to
extreme temperatures, direct sunlight, vibrations or mechanical stress.
• Use the laboratory power supply only in mild climates, never in the tropics. Re-
view the section on “Technical data” to see the permitted ambient conditions for
operation.
• Choose a location for the laboratory power supply that is stable, even, clean and
sufficient in size.
• Do not have any open flames in the direct vicinity of the laboratory power supply
and do not place any containers with liquids on or near the device.
• When you carry the laboratory power supply from a cold to a warm room, con-
densation may form. This poses the risk of fatal injury due to electric shock. Thus,
always allow the laboratory power supply to reach room temperature before con-
necting it to the power outlet and turning it on and/or using it.
• Before and during use, make sure that your hands, shoes, clothing, the floor and
the device itself are dry.
• Make sure that the insulation of the laboratory power supply, of the safety plugs, of
all connected cables and of the mains cable is not damaged or destroyed. Avoid
using unprotected wires.
• The mains outlet must be located near to the device and be easily accessible.
• Never pull the mains plug from the socket by pulling at the cable. Always pull it
from the mains socket using the intended grips.
• Unplug the mains plug from the mains socket if you do not use the device for an
extended period of time.
• Disconnect the mains plug from the mains socket in thunderstorms for reasons
of safety.
• Make sure that the mains cable is not squeezed, bent, damaged by sharp edges
or put under mechanical stress. Avoid excessive thermal stress on the mains
cable from extreme heat or cold. Do not modify the mains cable. Otherwise the
mains cable may be damaged. A damaged mains cable can cause a deadly elec-
tric shock.
• Do not touch the mains cable if it is damaged. First, power down the respective
mains socket (e.g. via the respective circuit breaker) and then carefully pull the
mains plug from the mains socket. Never use the product if the mains cable is
damaged.
• A damaged mains cable may only be replaced by the manufacturer, a workshop
commissioned by the manufacturer or a similarly qualified person, so as to prevent
any danger.
• Never plug in or unplug the mains plug when your hands are wet.
• Never pour any liquids over electrical devices or put objects filled with liquid right
next to the device. If liquid or an object enters the interior of the device never-
theless, first power down the respective socket (e.g. switch off circuit breaker)
and then pull the mains plug from the mains socket. Do not operate the product
anymore afterwards, but take it to a specialist workshop.
• When using the device, do not carry any conductive metal objects or jewelry such
as chains, bracelets, rings, etc.
• Never leave the laboratory power supply unattended during use.
• Shield all connected units from malfunction and from excess voltage.
• Connecting several devices in in series may cause dangerous voltage which can
pose a risk of fatal injury. Heed the low voltage guideline.
• The lab power supply generates heat during operation. Do not obstruct the ventila-
tion in any way. The power supply is cooled by an air outlet (13). Therefore, never
cover the lab power supply.
Operating instructions
Lab power supplies LB-153 / BT-305A
Item no. 1629437 Lab power supply LB-153
Item no. 1613363 Lab power supply BT-305A
Intended use
This laboratory power supply functions as a potential-free source of power for the operation
of low-voltage units. It has been developed for universal use in the research, development,
manufacturing, service and training fields. The units to be operated are connected via the
sockets on the front of the device. All operating controls and indicators have been neatly ar-
ranged to simplify use. The corresponding power and voltage values are easily visible on the
high-contrast LED display. The control dial on the front of the device is used to set current and
voltages values. The current consumption of a connected unit may not exceed the maximum
amperage as listed under technical data.
The laboratory power supply has a protection against overload and voltage reversal. The de-
vice conforms with protection class I. It has been approved for connection only to a grounded
power outlet and alternating voltage of 230 V/AC, 50 Hz.
Operation under adverse ambient conditions is not permitted. Adverse ambient conditions are
defined as such:
• wetness or high humidity
• dust and flammable gases, vapors or solvents
• thunder storms and/or similar conditions (avoid strong electrostatic fields in general)
For safety and approval purposes, you must not rebuild and/or modify this product. If you use
the product for purposes other than those described above, the product may be damaged.
In addition, improper use can cause hazards such as short circuiting, fire, electric shock etc.
Read the instructions carefully and keep them. Make this product available to third parties only
together with its operating instructions.
This product complies with the statutory national and European requirements. All company
names and product names are trademarks of their respective owners. All rights reserved.
Delivery content
• Laboratory power supply
• Mains cable
• Operating instructions
Up-to-date operating instructions
Download the latest operating instructions via the link www.conrad.com/downloads or scan the
QR code. Follow the instructions on the website.
Explanation of symbols
This symbol indicates a health hazard, e.g. electric shock.
The exclamation mark indicates specific risks associated with handling, function and
use.
The arrowsymbol indicates special tips and operating information.
The product is intended for use only in indoor dry spaces, it may not become moist
or wet.
This device is CE compliant and fulfills all applicable European guidelines.
Ground potential
Protective ground wire connection; do not loosen this screw.
