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3.3.2 Motor
The three-phase asynchronous motor consists of an en-
gine block and the engine shaft with the impeller assem-
bly. The circuit for the power supply is designed for the
maximal mechanical performance according to the char-
acteristics or the nameplate of the pump. The cable inlets
as well as the circuit are sealed resistant to jet water with
respect to the pumped medium. The shaft bearing is car-
ried out by means of robust, maintenance-free and perma-
nently lubricated antifriction bearings.
General motor nameplate data
Service factor
Operating mode with submersed motor
(CH413...)
Operating mode with submersed motor
(CH43...)
Operating mode with emerged motor or
60°C (CH43...)
Permitted medium temperature
Insulation class
Protection class
Cable length
Protective hose (CH43...) polyolefin
Voltage CH...W
Voltage CH...D
3.3.3. Monitoring devices
Temperature sensor
All pumps are equipped with a temperature sensor set in
the motor windings.
For all standard versions of pumps, the connections of the
temperature sensor are guided via the motor connecting
cable to the outside and are to be connected via the T1
and T3 conductor cable ends of the connecting cable in
the control cabinet in such a way that the motor automat-
ically restarts after cooling. The explosion-proof versions
have, instead of the standard sensor, a temperature sen-
sor set with a higher trigger temperature, which is to be
connected via the T1 and T2 conductor cable ends of the
connecting cable in such a way that after triggering, a
manual reset is required via a special contactor combina-
tion in the switchgear.
The temperature sensor set must be connected in the
switchgear so that it switches off in the event of over-
heating.
Triggering temperature of the temperature monitor-
ing/sensors:
Pump/motor
Standard winding
T1+T3 Regulator
CH432 / AM122...-2pol
140°C
CH436 / AM136...-2pol
140°C
1.15
S3 40%
S1
S3 40%
40°C, short-term 60°C
H
IP68
10 meters
5 meters
230V / 1Ph / 50Hz
400V / 3Ph / 50Hz
Ex winding
T1+T2 Limiter
140°C
140°C
Automatic float switch (version...A)
Version with automatic float switch HOMA Nivomatik, AS
floater, 10-meter connection cable, switchgear and man-
ual-0-auto switch. The single phase (1Ph) pumps are fur-
thermore equipped with integrated condensers and con-
nector. The three phase (3Ph) pumps are equipped with a
CEE reversing plug for rotational direction.
Motor cooling
Sufficient motor cooling is also ensured in snore operation
due to the water jacket with pressure connection on top.
(CH416.)
3.3.4. Seal / Seal housing
Sealing is achieved, independent of the direction of ro-
tation, through a combination of an axial face seal made
of silicon carbide and a radial seal made of Viton. For the
CH436, the sealing is achieved through two axial face
seals made of silicon carbide and Viton. The seal housing
of the CH432 and CH436 is situated between the motor
and the pump casing. It consists of the bearing housing
and the pressure cover, which together form the seal
chamber filled with medicinal white oil. This can be con-
trolled using the inspection plug on the bearing housing
and optional electronic monitoring.
3.3.5. Pump Casing
The pump casing is available with different pressure dis-
charges, depending on the version and engine variation.
This creates an optimal connection to the various types of
pipework. The pump CH413 are provided with a BSP 1½"
F pressure connection, whilst pump CH432 has a BSP 2"
M and CH436 has a BSP 2 ½" M pressure connection.
3.3.6. Impeller
The impeller is fixed on the engine shaft, which powers
it. The impeller is an open multi-blade impeller, for soiled
pumped medium with firm parts of up to 10 mm.
ENGLISH | 29
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