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SCT1xxx | Mini ring-type current transformer · 0 次阅读

Commissioning

DANGER

Open transformer circuits lead to electric shock and arc flashover!

Disregarding this will result in death, physical injury or considerable damage to property!

  • Never open the secondary circuit of the current transformer under load.
  • Short-circuit the secondary current terminals of the current transformer before removing the device.

WARNING

Hazardous voltage can lead to electric shock and burns!

  • Make sure that the details on the name plate and in the "Technical data" correspond to the operating parameters of the system.
  • Switch the system off before commencing with the installation!

WARNING

Induction of high voltages into the secondary circuit!

  • If the secondary circuit of the current transformer is not under load (open), high voltages are induced on its secondary terminals. The voltage values occurring there represent a danger to persons and the functional safety of the current transformer.
  • "Open operation", i.e. operation of the current transformer without secondary wiring, must be avoided at all costs.
  • Interrupt the power supply of the primary conductor and secure against being switched on again inadvertently.
  • Install the current transformer on the primary conductor.
  • To do this, feed the primary conductor (round conductor) through the window aperture of the current transformer housing. The window aperture is marked with "P1" and "P2".
  • Make the secondary connections.
  • Observe the markings "S1" and "S2" of the secondary terminals

Notice

Observe the conductor cross-sections and lengths!

The conductor cross-sections and lengths specified below must be adhered to for trouble-free function!

Conductor cross-section
mm²

Power loss
VA/m

0.5

0.070

0.75

0.047

1.0

0.035

1.5

0.023

Measuring circuit

Commissioning 1:Fig.20: Measuring circuit - SCT0xxx/SCT1xxx/SCT2xxx transformer

Assembly notes

  • To fasten the device to a mounting plate, use the optionally available snap-on mounting (ZB8201-0110) for DIN rails.
  • This can be fastened to the mounting plate with two screws, max. Ø 5 mm.
  • Fastening to a 35 mm DIN rail also takes place with the help of the optionally available snap-on mounting ZB8201-0110
  • Check whether the current transformer is mounted correctly and the secondary conductors are connected correctly.
  • Switch on the power supply to the primary conductor again.
Commissioning 2:Fig.21: Snap-on mounting, ZB8201-0110