4-8
Figure 4-9
Install a power lightning arrester
When connecting a power lightning arrester, follow these guidelines:
1) Make sure that the protection wire (PE) terminal of the power lightning arrester is well grounded
before using it.
2) After the AC power cord of the device is plugged into the multi-purpose socket of the power
lightning arrester (or a socket on a lightning protection busbar), check that the green LED is on and
the red LED is off to make sure that lightning protection can function normally.
3) If the red LED lights, identify the alarm cause and clear the alarm promptly. The red LED may light
because poor connection of the grounding cable or the live and zero wires are connected reversely.
To identify the alarm cause, you can use a multimeter to examine the polarity at the multi-purpose
socket of the power lightning arrester.
z
If the live and zero wires are on the left and right respectively (supposing that you are facing the
socket), the PE terminal of the power lightning arrester is not grounded.
z
If the live and zero wires are on the right and left respectively (supposing that you are facing the
socket), the polarity of the power socket of the power lightning arrester is reversed. In this case,
open the power socket to correct the polarity. If the red LED is still ON, you can determine that the
PE terminal of the power lightning arrester is not grounded.
Selecting and Installing a Signal Lightning Arrester (Optional)
The U200 series devices are not shipped with lightning arresters for signal components. You can
purchase one if needed.
Generally, before connecting a signal cable to a device, you need to connect the cable with a signal
lightning arrester to protect the device against transient overvoltage resulting from lightning strikes or
other interferences.
Содержание SECPATH U200-CS
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