5 Installation at Site
42 of 98
UPA / UPA S
3400.86/17-EN
5.6.2 Operation with soft starter
NOTE
For pump sets in VdS-approved sprinkler installations
For pump sets in VdS-approved sprinkler installations, also observe VdS guideline
VdS CEA 4001!
Submersible motors differ from ordinary standardised asynchronous motors in their
slim design (low moments of inertia), their output per size, mechanical seal design
and winding type.
The following reference values, based on our experience, ensure safe operation of
submersible borehole pumps.
The operator and the manufacturer of the soft starter are responsible for ensuring
that the particular features of submersible borehole pumps have been taken into
account. Depending on the make, the reference values provided might be exceeded.
Table 16:
Reference values for soft starters
Parameter / function
Setting
Minimum starting voltage
40 % of the motor's rated voltage
Ramp time / acceleration (run-up) time
t
H
< 4 seconds
Current limitation
I
A
/ I
N
Approx. 3.5
Deceleration (run-down) time / stop ramp t
A
< 4 seconds
Special functions, e.g.
▪
Delayed starting
▪
Current control
▪
Speed control
▪
Kick-start / boost function
OFF
ü
The operating manual of the soft starter is available and complied with.
1. After run-up, the soft starter must be bypassed by a contactor.
2. Always observe the operating manual of the soft starter.
3. Soft starters for two-phase connection are only permitted if the starter's control
algorithm eliminates the physically caused DC components.
4. If the soft starter fulfils motor protection functions, such as an over-current trip
(tripping class 10 or 10A), phase failure, etc., these functions must also be
ensured when the soft starter is bypassed.
NOTE
Conspicuous noises or vibrations during run-up and run-down could indicate
incorrect parameter settings on the soft starter, such as excessive ramp times,
incorrect operating mode (control) or enabled special functions.
5.6.3 Operation on a frequency inverter
NOTE
For pump sets in VdS-approved sprinkler installations
For pump sets in VdS-approved sprinkler installations, also observe VdS guideline
VdS CEA 4001!
NOTE
For pump sets with a UMA-S 150, UMA-S 200 or UMA-S 250 submersible motor that
are fitted with a PumpDrive R frequency inverter, also observe the operating
manuals of the frequency inverter and output filter.
