Wilo T 17 E3 Series User Manual

en Ex rating
96 WILO SE 2019-10
13.4.2 Motor without Digital Data Inter-
face
13.4.2.1 Monitoring of motor winding
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 limit (1-circuit temperature monitoring). As
an option, the motor can be fitted with a temperature control and limit function (2-cir-
cuit temperature monitoring).
The installed sensor specifies the trigger temperature as part of thermal motor monit-
oring. Depending on the thermal motor monitoring version, the following triggering
status must occur when the trigger temperature is reached:
ƒ Temperature limiter (1temperature circuit):
The unit must be deactivated with anti-reactivation lock once the trigger temper-
ature has been reached!
ƒ Temperature controller and limiter (2temperature circuits):
Once the trigger temperature for the low temperature is reached, the motor can de-
activate with automatic reactivation. Upon reaching the trigger temperature for the
high temperature limit, the motor must deactivate with manual anti-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
ƒ Connect the bimetallic strip using an evaluation relay. "CM-MSS" relay is recommen-
ded for this purpose.
Connection values: max. 250V(AC), 2.5A, cosφ=1
ƒ Connect the PTC sensor via an evaluation relay. "CM-MSS" relay is recommended for
this purpose.
ƒ If a frequency converter is used, connect the temperature sensor at the Safe Torque
Off (STO). This guarantees that the hardware deactivates the pump.
13.4.2.2 Leakage chamber monitoring
Connect the float switch using an evaluation relay! "CM-MSS" relay is recommended for
this purpose.
13.4.2.3 Monitoring of motor bearing
The connection is made as described in the “Electrical connection” section.
13.4.2.4 Sealing chamber monitoring (ex-
ternal electrode)
ƒ Connect the external pencil electrode via an Ex-rated evaluation relay! Relay
“XR-4…” is recommended for this.
The threshold is 30kOhm.
ƒ The connection must be made using an intrinsically safe circuit!
13.4.3 Frequency converter operation
ƒ Converter type: Pulse-width modulation
ƒ Min./max. frequency during continuous duty:
– Asynchronous motors: 30Hz up to rated frequency (50Hz or 60Hz)
– Permanent magnet motors: 30Hz up to the stated maximum frequency as per
rating plate
NOTICE!The maximum frequency may be below 50Hz!
– Comply with the minimum flow velocity!
ƒ Min. switching frequency: 4kHz
ƒ Max. overvoltage at the terminal board: 1350V
ƒ Output current at the frequency converter: max. 1.5times rated current
ƒ Max. overload time: 60s
ƒ Torque applications: quadratic pump curve or automatic energy optimisation pro-
cedure (e.g. VVC+)
Required speed/torque curves are available on request!
ƒ Observe additional measures with regard to EMC regulations (choice of frequency
converter, filters, etc.).

Wilo T 17 E3 Series Specifications

General

Brand	Wilo
Model	T 17 E3 Series
Category	Engine
Language	English