6
use and maintenance booklet - safety instructions
II
Group of the equipment. Group II: electrical equipment for use in places with an explosive gas atmosphere other than mines
3G
Category of the equipment subject of certification, in presence of potentially explosive atmospheres of Gas, Vapors, Mist (G). The
equipment can be installed in ZONE 2.
Ex nA
The type of electrical protection for the equipment corresponds to non-sparking equipment.
Ex nA nC The type of electrical protection for the equipment corresponds to non-sparking equipment with encapsulated thermal protection
device.
IIC
Equipment suitable for Gas Group IIC, IIB and IIA.
Ex h IIC The type of mechanical protection for the equipment is through liquid immersion “h”, suitable for Gas Group IIC, IIB and IIA.
T3
The maximum surface temperature is 200°C
Gc
Equipment for explosive gas atmospheres, having an “enhanced” level of protection, which is not a source of ignition in normal
operation (EPL Gc), suitable for use in zone 2.
IECEx EUT: laboratory that issued the IECEx certificate of conformity / EPT: laboratory that issued the ATEX certificate of conformity
16: year in which the certificate was issued
0006: IECEx certificate number / ATEX 0228: ATEX certificate number
X: special conditions:
1.
The submersible pump shall operate only completely submersed.
A suitable separated protection device shall be prevent the pump from operate when not fully submersed.
2.
Do not use the feeding cable to move the pump.
The cable shall be protected against the risk of damage due to mechanical stresses.
3.
The end connection of the feeding cable shall be made in safe area or in according to a type of protection listed in IEC
60079-0 standard suitable for the installation in hazardous area.
Notes:
•
Apparatus with a given temperature class are also suitable for all substances with a higher temperature class (e.g.: T3 pumps are suitable
for substances with a T3, T2, T1 temperature class).
•
The certificate number indicate on the nameplate is followed by an “X”. It means that the user must follow specific conditions of use
described in this manual.
•
non sparking apparatus are normally made to be used at an ambient temperature in the range of 0 ÷ +40°C in submersible conditions.
•
The pump has been designed to operate at the speeds indicated on the identification plate.
•
The information provided in our catalogues must be observed to prevent the pump from overheating.
2.4 Installations
2.4.1 Mains
Connections to the mains must be performed as shown in the wiring diagrams supplied with the pump in the “Instructions for use and
maintenance” manual.
If the terminal side of the cable is in a hazardous area, the connection has to be protected by a protection mode allowed by the IEC 60079-0
standard suitable for that hazardous area.
The plug has to be positioned out of the hazardous area.
Don’t keep the pump with the hand.
2.5 Auxiliary components
2.5.1 Thermal protection
nA nC pumps have a thermal protection inside the motor suitable for interrupt the power supply in case of pump malfunctioning.
2.5.2 Starting capacitor
GR
blue
PRO single phase pump version has a starting capacitor, which works in parallel to the standard capacitor, and it has to be connected
outside the pump in an electrical cabinet situated outside the explosive atmosphere.
If it could not possible to get the starting capacitor, the pump fully works without it but it is important to avoid the pump to process big solid
parts.
2.6 Earthing connection
Non sparking apparatus pumps are provided with two earthing terminals: one inside the pump envelope and the other on the pump frame.
Depending on the cross-section of the line conductor, the earthing conductor cross-section must be:
S - Line conductor section
H - Earth conductor section
S ≤ 16 mm
2
H = S
The earth connection is made in the sequence indicated in the figures below:
better together
