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13.3.4
Electrical connection
Motor compartment/sealing chamber
Pre-chamber (external pencil electrode)
With ATEX approval
Motor winding: Temperature limiter
Motor winding: Temperature controller and lim-
iter
With FM-/CSA-Ex approval
Motor winding: Temperature limiter
Motor winding: Temperature controller and lim-
iter
13.3.4.1 Monitoring the motor winding
46
Appendix
DANGER
Electrocution hazard!
Improper conduct when carrying out electrical work causes death due to electric shock!
• Electrical work must be carried out by a qualified electrician!
• Observe local regulations!
ƒ
Always connect the mixer to an electrical outlet outside the explosive area. If the con-
nection must 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-
observance may lead to a risk of fatal injury due to explosion! Connection must always be
carried out by a qualified electrician.
ƒ
All monitoring devices outside the "spark-proof areas" must be connected via an intrin-
sically safe circuit (e.g. Ex-i relay XR-4...).
ƒ
The voltage tolerance may not be higher than max. ±10 %.
Overview of possible monitoring devices for submersible mixers with Ex approval:
−
−
−
o
o
o
o
o
o
•
•
•
•
•
•
o
o
o
Legend
− = not possible, o = optional, • = standard
DANGER
Risk of explosion due to overheating of the motor!
If the temperature limiter is connected incorrectly, there is risk of explosion due to over-
heating of the motor! Always connect the temperature limiter to a manual reactivation
lock. This means that a "release button" must be manually activated!
−
−
−
o
o
o
o
o
o
•
•
•
•
•
•
o
o
o
−
o
o
•
•
o
WILO SE 2021-10
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