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6
Description and function
6.1
Description of the product
Fig. 7: LRL view - pipe installation
U
[kV]
pk
2,4
2,15 kV
2
1,6
1,2
0,8
0,4
0
0
0,2
0,4
0,6
400V (IEC 60034-17)
500V (IEC 60034-25, Level A)
690V (IEC 60034-25, Level B)
Fig. 8: Limit curve of the permissible pulse voltage
U
(including voltage reflection and damping),
pk
measured between the terminals of two strands,
as a function of the rise time t
r
Fig. 9: JRL view
Fig. 10: JRL view: Blind flange
30
• Motor with one-piece shaft to the pump (Fig. 1/2).
• The standard motor is fixed to the plug shaft of the pump (Fig. 3).
1,56 kV
1,35 kV
0,8
1
1,2
t
[µs]
r
Single-stage, low-pressure centrifugal pump with modular design.
The pump motor is supplied in two designs:
Both designs are low-vibration, compact units.
LRL:
The pump housing has an in-line construction, i.e. the flanges on the
suction and pressure sides lie along a centre line. The shaft is sealed
with a mechanical seal on the outside. The pump is mounted directly
to a sufficiently affixed pipeline as an in-line pump (Fig. 7).
In the LRLA version the pump is equipped with coupling protection,
which can be removed with a tool.
Operation of the LRL on Salmson control devices:
In conjunction with a control device (Salmson-VR system or Salmson-
CC system), the power of the pumps can be continuously controlled.
This allows optimisation of the pump output for the demands of the
installation and economically efficient pump operation.
Operation of the LRL on external frequency converters (third-party
products):
In princLRLe, the motors used by Salmson are suitable for use with
external frequency converters or third-party products if they comply
with the conditions specified in the application guidelines DIN IEC /
TS 60034-17 and/or IEC/TS 60034-25.
The pulse voltage of the frequency converter (without filter) must be
below the limit curve shown in Fig. 8. This is the voltage that is applied
to the motor terminals. This is not only determined by the frequency
converter, but also, for example, by the motor cable used (type,
cross-section, shielding, length, etc.).
JRL:
Two pumps are arranged in a shared housing (double pump). The
pump housing has an in-line design (Fig. 9). The base-load pump is
only operated in control operation in conjunction with a control
device. The second pump is available as a peak-load unit for full load
operation. Moreover, the second pump can adopt the reserve func-
tion in the event of a fault.
NOTE
Blind flanges, which allow the motor impeller unit to be replaced even
in double pump housing, are available for all pump types/frame sizes
in the JRL series (see chapter 5.4 "Accessories" on page 29) (Fig. 10).
A motor can therefore remain in operation while replacing the motor
impeller unit.
Salmson 12/2017
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