Dold Industries Ltd

11 Hamberts Rd. Blackall Ind. Estate
South Woodham Ferrers
GB-Essex, CM3 5UW
SL 9065CT

Underload monitor (Cos-phi monitor)

SL 9065CT


Nominal voltage

Current range

Response delay


  • 0059410
  • SL9065.11CT/100 3AC400V 5-100A
The underload monitor IK / SK / SL 9065 measures the phase shift between voltage and current.... more

Product description

The underload monitor IK / SK / SL 9065 measures the phase shift between voltage and current. The phase angle changes with changing load. This measuring method is suitable to monitor asynchronous motors on underload and no load independent of motor size. The early detection of up-coming break downs and preventive maintenance avoid expensive damages. As user you profit from the reliability and availability of your plant.

Technical specifications

Width: 35 mm
1- / 3-phase: 1, 3
Measuring range max.: 100 A
Operate delay: Yes
Auxiliary voltage: Without
Output contacts: 1 C/O contact
Enclosure design: Switch cabinet
Type: SL 9065CT


  • According to EN 60255-1
  • Detection of underload (cos ϕ)
  • Without auxiliary supply
  • Current up to 8 A Motors up to 5 A nominal current can be connected directly
  • Higher currents via current transformer
  • SL 9065CT with integrated current transformer for currents up to 100 A
  • Adjustable response value
  • Automatic reset (Alarm auto reset)
  • Adjustable operate delay up to 100 s
  • De-energized on trip
  • For single and 3-phase loads e.g. motors
  • Independent of phase sequence
  • 1 changeover contact
  • LED indicator voltage supply and alarm
  • DIN rail or screw mounting
  • Devices available in 2 enclosure versions:
    IK 9065: Depth 58 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43880
    SK 9065, SL 9065CT: Depth 98 mm, with terminals at the top for cabinets with mounting plate and cable duct
  • IK 9065, SK 9065 width 17.5 mm
  • SL 9065CT width 35 mm

    IK/SK 9065/100: as IK/SK 9065 but:
  • Programmable for
    - Automatic reset or manual reset (latched alarm)
    - Energized or de-energized on trip
  • With reset button
  • Remote reset