Shutdown - KSB UPA Installation & Operating Manual

Flow rate
Q [m³/h]
1600
1800
2000
62 of 98
6 Commissioning/Start-up/Shutdown
Flow
velocity
v [m/s] UMA 150
UMA-S 150
≥ 0,2 -
≥ 0,5 -
≥ 0,2 -
≥ 0,5 -
≥ 0,2 -
≥ 0,5 -

6.3 Shutdown

DANGER
Electrical equipment overloaded by uncontrolled rotation of the magnet rotor of a
UMA-S 150, UMA-S 200 or UMA-S 250 submersible motor
Danger of death from electric shock!
▷ Take suitable precautions to prevent any inadvertent motor rotation caused by
uncontrolled backflow of the fluid handled.
▷ As an option, provide electrical protection devices between the motor and the
frequency inverter, such as fuses or circuit breakers.
CAUTION
Surge pressure caused by sudden stopping of the pump set
Damage to the machinery right through to the pump set falling down!
▷ Slowly close the shut-off element on the discharge side.
CAUTION
Uncontrolled backflow of the fluid from the riser
Damage to the pump set!
▷ Prevent any uncontrolled backflow of the fluid handled with suitable means.
▷ Control the fluid backflow, e.g. by throttling the gate valve in the discharge
line.
Clean water / drinking water
1. Slowly close the shut-off element on the discharge side.
2. Switch off the motor immediately after closing the shut-off element.
3. Start up the pump set every two weeks for approximately five minutes during
prolonged shutdown periods. (ð Section 6.1, Page 54)
Corrosive fluids (e.g. salt water), contaminated water:
1. Slowly close the shut-off element on the discharge side.
2. Switch off the motor immediately after closing the shut-off element.
3. Start up the pump set every 48 hours for approximately 5 minutes during
prolonged shutdown periods. (ð Section 6.1, Page 54)
UPA / UPA S
Well diameter or inside shroud diameter [mm]
UMA 200 UMA 250
UMA-S 200 UMA-S 250
- -
- -
- -
- -
- -
- -
UMA 300 14D
≤ 1705 ≤ 1720
≤ 1100 ≤ 1120
≤ 1805 ≤ 1820
≤ 1165 ≤ 1180
≤ 1900 ≤ 1910
≤ 1225 ≤ 1240