5.2 Requirements for Conpliance with the Low Voltage Directive
5.2.3 Control panel
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5.2.3
Control panel
Because the GOT is open type equipment (device designed to be stored within another device), be sure to
use it only when installed in a control panel.
(1) Shock protection
In order to prevent those who are unfamiliar with power facility, e.g., an operator, from getting a
shock, make sure to take the following measures on the control panel.
(a) Store the GOT within the control panel locked, and allow only those who are familiar with
power facility to unlock the panel.
(b) Build the structure in order that the power supply will be shut off when the control panel is
opened.
(2) Dustproof and waterproof features
The control panel also provides protection from dust, water and other substances. Insufficient
ingression protection may lower the insulation withstand voltage, resulting in insulation destruction.
The insulation in the GOT is designed to cope with the pollution level 2, so use in an environment
with pollustion level 2 or better.
5.2.4
Grounding
The following are applicable ground terminals.Use them in the grounded state.
Be sure to ground the GOT for ensuring the safety and complying with the EMC Directive.
Protective grounding
: Ensures the safety of the GOT and improves the noise resistance.
Functional grounding
: Improves the noise resistance.
Pollution level1 : An environment where the air is dry and conductive dust does not exist.
Pollution level2 : An environment where conductive dust does not usually exist, but occasional
temporary conductivity occurs due to the accumulated dust.
Generally, this is the level for inside the control panel equivalent a control room
or on the floor of a typical factory.
Pollution level3 : An environment where conductive dust exits and conductivity may be
generated due to the accumulated dust.
An environment for a typical factory floor.
Pollution level4 : Continuous conductivity may occur due to rain, snow, etc. An outdoor
environment.
