ATEG Automation GmbH
|
Intzestraße 50
|
42859 Remscheid
|
Germany
|
Tel.: +49 (0)2191 / 591457-0
|
|
www.ateg.de
Datenblatt
Zeitrelais H3DT
H3DT
H3DT
34
Other Precautions
• If the Timer is mounted on a control panel, dismount the Timer from
the control panel before carrying out a voltage withstand test
between the electric circuits and non-current-carrying metal parts
of the Timer. (Otherwise, the internal circuits of the Timer may be
damaged.)
• The H3DK-H uses a latching relay for the output. Shock, such as
dropping the H3DK-H during shipment or handling, can cause the
output contacts to reverse to the neutral position. Check the output
status with a tester before using the H3DK-H.
• The life expectancy of the control output contacts is greatly
affected by switching conditions. Always confirm operation using
the actual conditions and equipment before using the Timer and
make sure that the number of switching operations presents no
problems in performance. If Timer application is continued after
performance has deteriorated, insulation failure between circuits,
burning of the control output relay, or other problem will eventually
occur.
• If the power supply voltage is gradually increased, a power reset
may occur or the Timer may time out. Use a switch, relay, or other
device with contacts to apply the power supply voltage all at once.
• Make sure that residual voltage or inductive voltage is not applied
after the power turns OFF.
• Error in the operation time of the Timer is given as a percentage of
the full-scale time. The absolute value of the error will not change
even if the set time is changed. Therefore, always use the Timer
with the set time set as close as possible to the full-scale value of
the set time range.
• When switching a microload, check the specified minimum load
given for the Timer model you are using.
• When setting the operating time, do not turn the dial beyond the
scale range.
• Store the Timer within the rated ranges given for the Timer model
you are using. If the Timer is stored below • 20°C, allow it to warm
up for three hours at room temperature before turning ON the
power supply.
• Do not install the Timer in any way that would place a load on it.
• When cleaning the Timer, do not use thinners or solvents. Use
commercial alcohol.
• If better accuracy is required in the set time, adjust the dial while
measuring the operation time.
• Do not construct a circuit for the H3DT-H that would allow
overcurrent and burning to occur if the NO, NC and SPDT contacts
are short-circuited. Arcing may generate short-circuiting between
contacts if there is short-circuiting because of conversion to the
MBB contacts caused by asynchronous operation of the NO and
NC contacts, the interval between the NO and NC contacts is
small, or a large current is left open.
• If the Timer is reset immediately after timing out, make sure that the
circuit configuration allows sufficient resetting time. Errors will
occur in the sequence if there is not sufficient resetting time.
• When directly switching a DC load, the switching capacity will be
lower than when switching an AC load.
• Refer to the datasheet for the H3DK for cable selection and other
conditions for compliance with EMC standards.
Precaution on EN Standard Compliance
The H3DT complies with EN 61812-1 when it is built into a panel, but
observe the following handling methods to ensure compliance with
the requirements of this standard.
Wiring
Overvoltage category III
Pollution degree 2
• Open-frame Device
• If basic, double, or reinforced insulation is required, use the basic,
double, or reinforced insulation defined in IEC 60664 that is
suitable for the maximum applied voltage for the clearance, solid
insulation, and other factors.
• The power supply terminals and input terminals are not isolated
from each other.
• There is basic insulation between the power supply terminals and
output terminals.
• There is basic insulation between the input terminals and output
terminals.
• The operating section must have reinforced or double insulation.
• The sides of the case are not isolated.
• Connect the output contacts (contacts with different polarity) so
that they reach the same potential.
Recommended Replacement Periods and Periodic Replacement
as Preventive Maintenance
The recommended replacement period for preventive maintenance is
greatly influenced by the application environment of the product. As a
guideline for models that do not have a Maintenance Forecast
Monitor, the recommended replacement period is 7 to 10 years.
*
To
prevent failures that can be caused by using a product beyond its
service live, we recommend that you replace the product as early as
possible within the recommended replacement period. However,
realize that the recommended replacement period is for reference
only and does not guarantee the life of the product.
Many electronic components are used in the product and the product
depends on the correct operation of these components to achieve
product functions and performance. However, the influence of the
ambient temperature on aluminum electrolytic capacitors is large, and
the service life is reduced by half for each 10°C rise in temperature
(Arrhenius law). When the capacity reduction life of the electrolytic
capacitor is reached, the product may fail. We therefore recommend
that you replace the product periodically to minimize product failures
in advance.
*
The following conditions apply: rated input voltage, load rate of 50%
max., ambient temperature of 35°C max., and the standalone
mounting method.
This product model is designed with a service life of 10 years
minimum under the above conditions.
EN/IEC Standard Compliance
Not isolated
Reinforced insulation
(or double insulation)
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