Ground Check Measurement - Nederman E-PAK 150 DX Manual De Instrucciones

EN E-PAK 150 DX/300 DX/500 DX
8.3.2
36
directives and standards listed in 'Directives':
• Take proper measures to avoid all types of electrical stray currents to
and/or from the duct system and electrical wiring.
• Check that the input voltage and frequency to the unit are correct.
• A lightning conductor is to be installed if the unit is installed outdoors.
The installation of the lightning conductor is to follow national and local
regulations for such a protection device.
NOTE!
To minimize any secondary explosion damage and spread of fire, the
proper documentation and checklists of how to handle a fire in the unit has
to be developed. Such documents are to be developed in co-operation with
the local fire authorities, and take into account the properties of the collected
material.

Ground check measurement

Check that the unit is properly grounded after both the main installation and
regular maintenance work. If a component is removed and refitted, ground
connection is to be verified.
NOTE!
All metal parts of the unit are to be grounded. The
system is to have two independent ground connections; one on the
E-PAK 150 DX/300 DX/500 DX (GND1) and the other one on the duct system.
Follow the procedure in To measure ground connection: below to ensure this.
Ground connection is measured between GND1, see Figure 25, terminal PE,
and the following components on the unit, see Figure 10:
1. Filter bags.
2. Explosion relief panel.
3. Inlet.
4. Collector bin.
5. Fan.
To measure ground connection:
NOTE!
The duct system (inlet and outlet) is NOT to be connected during
measuring.
1. Disconnect mains ground from GND1.
2. Measure between all components according to the list above and GND1.
The value is to be ≤100 ohm.
3. Measure and check whether there is contact between the incoming duct
system and the disconnected incoming mains ground. The value is to be
≤10 ohm.
5
4. Connect the incoming duct system. Ensure that there is a second ground
connection between the duct system and the unit and that it is properly
grounded to the unit.
1) Measure and check whether there is contact between GND1 and the
external mains ground (≤10
5. Reconnect mains ground to GND1.
6. Connect the outgoing duct system. Ensure that there is ground connection
between the duct system and the unit.
ohm).
5