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9.7
Residual current input
The maximum rated residual current that can be measured with
the transformer is a peak value of 10 A. For the measuring unit
a maximum rated current of 10 mA applies (secondary current transformer).
9.8
Symbols
The safety symbol on the transformer connections indicates a general
hazard point. All connections for measuring devices in category I are
labelled in this way.
9.9
Cleaning and consumable materials
The device does not require any special cleaning.
There are no consumable materials, which means that no mainte-
nance intervals have to be complied with for their replacement.
9.10
Operational safety
If the device is not used in accordance with the manufacturer's
operating instructions, the intended protection may be impaired.
Operational safety will no longer be guaranteed.
9.11
Maintenance
The device has no wearing parts. No maintenance work is therefore required.
9.12
Warranty
All professionally installed, unaltered devices are covered by warranty
during the statutory warranty period from the day of purchase by the
end user. The guarantee is not applicable to damage incurred during
transport or caused by short-circuit, overloading or improper use.
In the event of defects in workmanship or material being discovered
within the warranty period, the company will provide repair or
replacement free of charge. The warranty will be rendered null and
void if the device is opened without authorisation.
9.13
Measurement category
The device corresponds to measurement category I
(measurements in circuits not directly connected to the mains).
Warning:
The device must not be used in measurement categories II, III
and IV. Protection and operational safety will no longer be guaranteed.
9.14
Firmware and updates
Current information about firmware versions and updates
can be found on our website, www.doepke.de.
9. Rating data
9.1
Supply voltage
The power supply is provided via +5 V (USB).
9.2
Description of input connections
The USB cable, which is connected to the PC/notebook, is connected
via a USB socket. The transformer is connected to the DRCA 1-CT
socket with the supplied DRCA 1-MC measuring cable.
9.3
Environmental conditions
Pollution degree 2: The device must only be used indoors.
Temperature range: 0 °C to 45 °C
Humidity: max. 90% rel. humidity. Condensation not permitted.
Max. permitted height above sea level: 2000 m
9.4
Installation requirements
The following requirements must be met during assembly,
selection of installation location and installation:
All installation work relating to the residual current transformer must
only be performed by appropriately qualified specialist personnel.
For the installation, the voltage to the distribution board must first
be switched off.
The residual current transformer must be added to the circuit at the point
at which the residual current circuit-breaker is or will in future be located.
For the measurement, the transformer must be permanently installed
in the distribution board.
The residual current transformer is connected to the measurement device
using the DRCA 1-CT measuring cable.
Only residual currents may be measured, not load currents
such as individual phases of a motor.
9.5
Connection to the power supply
The measurement device is connected to the computer using
a USB cable (plug type A to plug type B).
9.6
Ventilation and cooling
The device does not require any special measures with regard
to ventilation or cooling.
RATING DATA
