Lorentz ECDRIVE 150 C - Running Test

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BERNT LORENTZ GmbH & Co. KG
Siebenstücken 24, 24558 Henstedt-Ulzburg, Germany,
Tel (+49) 0 4193 8806-700, Fax -708, www.lorentz.de
Troubleshooting guide for LORENTZ ECDRIVE submersible
Version: V171115
All specifications and information are given with good intent, errors are possible and products may be subject to change without notice.
Pictures may differ from actual products depending on local market requirements and regulations.
2.4 Running test
If the visual, electrical and mechanical inspection results in no obvious defect, i.e.
• the shaft can be turned
• the resistance between the motor phases is leveled
• the isolation of the motor is within the limits
please check the general function of the motor by connecting the motor to the controller. However,
for this test the pump end and motor need to be separated before switching on the controller to
avoid damage on the pump end. Only perform this test on the surface if it does not take longer than
5 min. If the test takes longer, the motor needs to be submerged, e.g. in a water bucket, to prevent
heat build-up inside the motor.
The following table shows the power consumption for each submersible motor:
Product
min. required voltage
[V]
Speed
[rpm]
approx. max. motor current
[A]
ECDRIVE 150
24
2440
1.4
ECDRIVE 200
48
2950
0.8
ECDRIVE 600
48
2950
0.8
ECDRIVE 1800
100
3200
0.5
ECDRIVE 4000
200
3290
0.5
The general procedure of the running test is:
(1) Remove the pump end from the motor
(2) Connect the motor cable to the controller
(3) Put the motor in vertical position
(4) Connect with the controller using PumpScanner
(5) Switch on the controller and compare the speed of the motor with the table above
(6) Adjust the speed using PumpScanner (Operational Settings)
(7) Compare the actual data in PumpScanner with the values in the table
(8) Optional: cut the cable below the cable splice and redo the test
If there is a difference between running with and without cable splice, there is a defect on the cable
splice. However, it is recommended to perform a running test under load (submerged in water and
with a pump end connected) before reinstalling the pump on site after a cable splice replacement.
Experience has shown that an electrical defect is very often caused by cable splice. Therefore,
LORENTZ recommends redoing the splice in case of any signs for an electrical defect. Incorrectly done
cable splices can result in different abnormal behaviors. Sometimes, the defect persists only under
special conditions (mechanical load on the cable, high current, etc.).