Wilo Flumen OPTI-TR 20-1 Instrucciones De Instalación Y Funcionamiento página 318

en
13.3.4 Electrical connection
Type
Motor compartment
Motor winding: Temperature limiter
Motor winding: Temperature controller and lim-
iter
Sealing chamber (external pencil electrode)
13.3.4.1 Monitoring of motor winding
318
Appendix
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:
o o o
• • •
o o o
o o o
Legend
− = not available/possible, o = optional, • = standard
DANGER
Risk of explosion due to overheating of the motor!
If the temperature limiter is connected incorrectly, there is a risk of explosion due to
overheating of the motor! Always connect the temperature limiter to a manual re-
activation lock. This means that a "release button" must be manually activated!
Depending on the version of the thermal motor monitoring, the following triggering
status must occur when the threshold value is reached:
▪ Temperature limiter (1 temperature circuit):
When the threshold is reached, deactivation with reactivation lock must take place!
▪ Temperature controller and limiter (2 temperature circuits):
When the threshold for the low temperature is reached, the motor can deactivate with
automatic reactivation. When the threshold for the high temperature is reached, the
motor must deactivate with reactivation lock!
CAUTION! Motor damage due to overheating! In the event of automatic reactiva-
tion, comply with the specifications for the maximum switching frequency and
switching break!
Connection of the thermal motor monitoring
▪ Connect the bimetallic strip via an evaluation relay. Relay "CM-MSS" is recommended
for this. The threshold is preset.
− − −
o o o
• • •
o o o
−
o
•
o
WILO SE 2019-01