The precision holding device PWD 3000 is used for the determination of the electric resistance per meter of power and medium voltage cables. The measurement is based on the 4-pole method according to Kelvin in order to eliminate the feed line resistances.
精密保持装置PWD 3000用于测量每米电力和中压电缆的电阻。为了消除馈线电阻，根据开尔文的四极法进行了测量。
| Measuring distance Length of test object Diameters (Model 2000): Diameters (Model 2040): Diameters (Model 3000): |
1000 mm ± 0,2 mm > 1350 mm 10 mm² – 1200 mm² 30 mm² – 2000 mm² 30 mm² – 1200 mm² |
| Measuring current | 50 A max. |
| Water capacity approx. 15 l Circulation Circulation pump Zuleitungskontakten Fehler bei Potentialkontakten Bereichsüberschreitung >80% Thermospannungskompensation |
integrated water flow system 230 V AC or 115 V AC |
| Pneumatic Nominal pressure 8 bar Holding / release of test object Security Longitudinal feed force (model L) |
by switch (open / close) Holding procedure only by closing covers selectable |
| Model overview: | |
| PWD 2000 P | no longitudinal tension device provided |
| PWD 2000 P / L semi-autom. | the tensile force required can be adjusted via a control device (control knob with calibration). The force required must be looked up in a table. Reproducible tensile forces and thus reproducible measurements are possible. |
| PWD 2000 P / L automatic | design as with semi-automatic device, but the resistance value and thus the cross-section of the cable is determined first by the MR300C-A MICROOHMMETER, then the corresponding tensile force is looked up in an internal table and applied via an electropneumatic actuator. The following second measurement is the correct measurement which is displayed. This enables easily reproducible measurements without any human errors. The table can be entered or modified into the instrument via a computer and is stored even when the instrument is switched off. The user will be responsible for this table. |
| PWD 3000 Cu / Cu-Al | For non isolated stranding machines. No longitudinal tension is provided |
