Ex Rating - Wilo HC 20.1+EMU FA Instrucciones De Instalación Y Funcionamiento

en-US
13.3

Ex rating

13.3.1 Identification of Ex-rated pumps
13.3.2 Protection class
13.3.3 Intended use
50
Appendix
▪ In the event of a fault on the internal sealing chamber control, use the external double-rod
electrode.
The following construction measures can also help to reduce or prevent faults:
▪ Separate power supply cables for the main and control cable (depending on the motor size).
▪ When laying, ensure there is adequate clearance between the main and control cable.
▪ Use shielded power supply cables.
Summary
▪ Continuous duty up to rated frequency (50 Hz or 60 Hz), observing the minimum flow veloc-
ity.
▪ Observe additional measures with regard to EMC regulations (choice of frequency converter,
using filters, etc.).
▪ Never exceed the rated current or rated speed of the motor.
▪ It must be possible to connect the motor's own temperature monitor (bimetallic strip or PTC
sensor).
This section contains further information on the operation of the pump in an explosive at-
mosphere. All personnel must read this section. This section applies to Ex approval pumps
only!
For use in explosive atmospheres, the pump must be marked as follows on the rating plate:
▪ "Ex" symbol for the relevant approval
▪ Ex classification
▪ Certification number (depending on the approval)
The certification number, if required by the approval, is printed on the rating plate.
The motor's design version corresponds to the following protection classes:
▪ Flameproof enclosure (ATEX)
▪ Explosionproof (FM)
In order to limit the surface temperature, the motor must be equipped with a temperature
limiter (1‑circuit temperature monitoring).
DANGER
Explosion due to pumping explosive fluids!
Pumping highly flammable and explosive fluids (benzene, kerosene etc.) in their pure
form is strictly forbidden. There is a risk of fatal injury due to explosion! The pumps are
not designed for these fluids.
ATEX approval
The pumps are suitable for operation in potentially explosive atmospheres:
▪ Device group: II
▪ Category: 2, zone 1 and zone 2
These pumps must not be used in zone 0!
FM approval
The pumps are suitable for operation in potentially explosive atmospheres:
▪ Protection class: Explosionproof
▪ Category: Class I, Division 1
Notice: If the cabling is carried out according to Division 1, installation in Class I, Division 2 is
also permitted.
WILO SE 2019-01