Wilo HC 20.1 + EMU FA Serie Manual De Instrucciones página 194

en
13.3.4 Electrical connection
13.3.4.1 Monitoring of terminal room/mo-
tor compartment
13.3.4.2 Monitoring of motor winding
13.3.4.3 Leakage chamber monitoring
13.3.4.4 Monitoring of motor bearing
13.3.4.5 Sealing chamber monitoring (ex-
ternal electrode)
13.3.4.6 Frequency converter operation
194
Appendix
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 pump 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 fatal injury due to explosion! 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:
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 the monitoring devices fitted must always be connected!
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 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!
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.
▪ Connect the external pencil electrode via an Ex-rated evaluation relay! Relay "XR-4..." is
recommended for this.
The threshold is 30 kOhm.
▪ The connection must be made using an intrinsically safe circuit!
▪ Type of converter: Pulse-width modulation
HC 20.1 HC 20.1 ...-E3
• •
• •
o o
− −
• •
− −
o o
WILO SE 2019-01