Function Description; Operating Modes; Technical Data; Type Key - Wilo Sub TWU 3 HS Serie Einbau- Und Betriebsanleitung

English
The frequency converter offers the following
monitoring functions:
Monitoring
Undervoltage
Overvoltage
Short-circuit
Temperature (frequency converter)
Dry run
Leakage
The external frequency converter is not over-
flow-proof. Note that the device has protec-
tion class "IP X5" and only ever install it over-
flow-proof in dry rooms.
3.2.4. Sealing
The sealing between the motor and hydraulics is
achieved by a lip seal.

3.3. Function description

3.3.1. Version "HS-I"
In the "HS-I" version, the pump is switched on
and off via a separate switching system. After
it is switched on, the pump is accelerated to its
maximum speed via the integrated frequency
converter, pumping at full power. Frequency-de-
pendent control and pressure-dependent control
are not possible.
3.3.2. Version "HS-ECP"
The "HS-ECP" version is operated with an external
frequency converter. This both serves as a sep-
arate control unit for the pump and it provides
a control function for constant pressure ("CP").
This function makes it possible to always ensure
the same pressure at the tap, regardless of the
volume flow.
The pump is controlled via the frequency con-
verter, where the target pressure is set. When wa-
ter is drawn from the tap, the frequency converter
switches the unit on. The frequency converter
uses the preset pressure to calculate the required
volume flow and it adjusts the motor speed ac-
cordingly. This enables a constant pressure at all
times at the tap.

3.4. Operating modes

3.4.1. Operating mode S1 (permanent operation)
The pump can operate continuously at the rated
load without exceeding the permissible temper-
ature.
34
Submersible pump
HS-ECP HS-I
Mains connection [U/f]:
• •
Rated power [P
• •
Maximum pump head [H]:
• • Maximum volume flow [Q]:
Activation type [AT]:
• •
Fluid temperature [t]:
• •
Protection class:
• -
Insulation class [Cl.]:
Speed [n]:
Max. immersion depth:
Submerged [OT
Non-immersed [OT
Max. switching frequency:
Max. sand content:
Min. flow at motor:
Pressure connection:
External frequency converter
Mains connection:
Output power:
Fluid temperature [t]:
Ambient temperature [t]:
Protection class:
Max. pressure:
Connection:
Control function:
Example: Wilo-Sub TWU 3-0305-HS-E-CP
TWU
3
03
05
HS
E
CP
PRODUCT DESCRIPTION

3.5. Technical data

See rating plate
]: See rating plate
2
See rating plate
See rating plate
direct
3...35 °C
IP 58
F
Max. 8400 rpm
150 m
]: S1
S
]: -
E
30 /h
50 mg/m³
0.08 m/s
Rp 1
See rating plate
3~230 V/max. 140 Hz/max.
1.5 kW
3...35 °C
4...40 °C
IP X5
7.5 bar
G 1¼
Constant pressure

3.6. Type key

Submersible pump
Diameter of the hydraulic unit in inches
Rated volume flow in m³/h
Number of hydraulic stages
High-speed version with speeds of up to
8400 rpm
Frequency converter version
E = external frequency converter
I = internal frequency converter
Control function
CP = constant pressure control via variable
speed
Without = fixed speed of up to 8400 rpm

3.7. Scope of delivery

• Submersible pump with cable
• Installation and operating instructions
WILO SE 05/2014 Ed.04 DIN A4