Wilo HC 20.1+EMU FA Instrucciones De Instalación Y Funcionamiento página 51

13.3.4 Electrical connection
13.3.4.1 Monitoring of terminal room/mo-
tor compartment
13.3.4.2 Monitoring the motor winding
13.3.4.3 Leakage chamber monitoring
13.3.4.4 Monitoring of motor bearing
Installation and operating instructions Wilo Motor HC 20.1 + EMU FA, Rexa SUPRA, Rexa SOLID
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 in accordance with the local
regulations.
▪ Always connect the pump to an electrical outlet outside the explosive area. If the connec-
tion 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 fatal injury due to explosion! Connection must always be carried out by a quali-
fied electrician.
▪ All monitoring devices outside the "spark-proof areas" must be connected via an intrinsi-
cally safe circuit (e.g. Ex-i relay XR-4...).
▪ The voltage tolerance may not be higher than max. ±10 %.
Overview of possible monitoring devices:
Internal monitoring devices
Terminal room/motor compartment
Motor winding
Motor bearings
Sealing chamber
Leakage chamber
Vibration sensor
External monitoring devices
Sealing chamber
Key: − = not available/possible, o = optional, • = as standard
All monitoring devices fitted must be connected at all times!
The connection is made as described in the "Electrical connection" section.
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!
The motor is equipped with a temperature limiter (1-circuit temperature monitoring).
When the threshold is reached, deactivation must occur with a restart interlock!
Connection of the thermal motor monitoring
Connect the PTC sensor via an evaluation relay. Relay "CM-MSS" is recommended for this.
The threshold is preset.
Connect the float switch using an evaluation relay! Relay "CM-MSS" is recommended for
this. The threshold is already pre-set.
The connection is made as described in the "Electrical connection" section.
HC 20.1 HC 20.1 ...-E3
• •
• •
o o
− −
• •
− −
o o
en-US
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