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13.3.1
Identification of Ex-rated mixers
13.3.2
Protection class
13.3.3
Intended use
13.3.4
Electrical connection
Motor compartment/sealing chamber
Pre-chamber (external pencil electrode)
Installation and operating instructions Wilo-EMU TR/TRE 50-2 ... 120-1
Appendix
For use in explosive atmospheres, the mixer must be marked as follows on the rating
plate:
▪ "Ex" symbol of the corresponding 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)
▪ Flameproof enclosures (CSA-EX)
In order to limit the surface temperature, the motor must be equipped with at least one
temperature limiter (1‑circuit temperature monitoring). It may also be equipped with a
temperature controller (2‑circuit temperature monitoring).
ATEX approval
The mixers are suitable for operation in potentially explosive atmospheres:
▪ Device group: II
▪ Category: 2, zone 1 and zone 2
Mixers must not be used in zone 0!
FM approval
The mixers 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, Divi-
sion 2 is also permitted.
CSA Ex rating
The mixers are suitable for operation in potentially explosive atmospheres:
▪ Protection class: Explosion-proof
▪ Category: Class 1Division 1
DANGER
Risk of death due to electrocution!
Improper conduct when carrying out electrical work can lead to death due to electric
shock! Electrical work must be carried out by a qualified electrician in accordance
with the locally applicable regulations.
▪ Always connect the mixer to an electrical outlet outside the explosive area. If the con-
nection has to be made within the explosive area, then the connection must be carried
out in an Ex-rated housing (ignition protection class according to DIN EN 60079‑0)!
Non-compliance will lead to a risk of fatal injury from explosion! The connection must
always be carried out by a qualified electrician.
▪ All monitoring devices outside the "spark-proof areas" must be connected via an in-
trinsically safe circuit (e.g. Ex-i relay XR-4...).
▪ The voltage tolerance may not be higher than max. ±10 %.
Overview of possible monitoring devices:
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