DeNOx
4.7 Electrical connections
WARNING
Hazardous electrical voltage
The device must be installed by trained staff only.
CAUTION
Wrong mains voltage
Wrong mains voltage may damage the device.
Regard the correct mains voltage as given on the type plate.
WARNING
High voltage
Damage to the device in case of insulation testing
Do not proceed insulation tests with high voltage to the device as a whole!
CAUTION
Maximum power input
The power adapter must be suitable for the maximum power input of the device. It must be made of heat-resistant material
and may not come into contact with hot surfaces. The power adapter must comply with IEC60227 or IEC60245 or be approved by
another recognised testing body.
Electric strength test
This unit is equipped with extensive EMC protection. Testing the electric strength will damage electronic filter components. The
necessary tests of all assemblies required to be tested were carried out at the factory (test voltage 1 kV or 1.5 kV depending on
component).
To check the electric strength again yourself, only do so on the respective individual components.
• Disconnect / unplug all components (see pin assignment in the appendix).
• Now perform the electric strength test against earth.
These probes have controllable, adjustable heating. The controller is included.
The probe is already wired to the controller.
Inside the controller housing is a terminal block for connecting the alarm output. It is connected according to the terminal dia-
gram (see attached) with the included plug connectors. For this purpose the plugs can be removed from their sockets and rein-
serted once wired. The pin assignment is also printed onto the board.
The supply lines and protective earth cross section must be configured for the maximum current consumption of the device or
of the entire system, respectively. External circuits must have at least at least the basic insulation, for which the connection is
specified.
If the heat dissipation is very high near the probe due to the application, install an appropriate shield provided by the customer
for protection.
The device must be incorporated into the protective conductor system of the operator.
The following separation facilities are to be provided for the current and voltage supply of the components:
Ground fault circuit interrupter, main switch and circuit breaker or fuses
The following conditions must be met for use:
• The automatic disconnecting device must switch off the load within the prescribed time.
• It must be designed for the highest working voltage and, if applicable, for the highest operating current. Air and creepage
distances between the terminals of the power or voltage-limiting device must meet the requirements for reinforced insula-
tion.
• The device switches or circuit breakers used as a disconnecting device must comply with the applicable requirements of
IEC60947-1 and IEC60947-3 and be suitable for the application. These may not be installed in the mains connection cable or
interrupt the protective conductor and must disconnect all current-carrying conductors. It must be installed in the vicinity
of the system, be easily accessible, and be marked as the disconnecting device.
26 Bühler Technologies GmbH
BX460035 ◦ 08/2017
