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ALO-E R21

ALO-E R21

Calibrated clip-on current transformersfrom €71.07 incl. VAT

Available at short notice – made and tested for you by the manufacturer CELSA · see each version

24h24h express production available – selectable at checkout while the manufacturer's capacity allows.

Datasheet (PDF)

Product description

Article features

  1. This calibrated current transformer is suitable for billing purposes
  2. The design is approved by the Physikalisch Technische Bundesanstalt (PTB) Braunschweig
  3. This clip-on current transformer is mostly used for new installations, as the circuit must be interrupted here.
  4. Short-circuiting of the current transformer when the secondary terminal cover is open.
  5. More economical cable routing and lower power loss due to elimination of the transformer disconnect terminal.
  6. Easy handling facilitated by a rotatable and sealable secondary terminal cover.
  7. Suitable for both floor and side mounting.
  8. Most cost-effective and most common variant
  9. Simply plug the transformer onto the primary conductor (no need for complex wiring)
  10. Currently the most compact design on the market, thus wonderfully suitable for the control cabinet
  11. Other areas of application are machine and plant construction.
Round conductor
Ø 20 mm
Dimensions (W × H × D)
44 × 68 × 31 mm
Design
Calibrated plug-on current transformer
Secondary connection
Screw terminal
Touch protection
yes
Packaging (W × H × D)
51 × 77 × 32 mm
Rated current
100 – 500 A
Instrument security factor
FS 5

Scope of delivery

  • 2 ×Plug-in foot ALO/WALO
Instruction manualSTEP-DateiDimensioned drawing

Conditions of use

Secondary current5A / 1A / 333mV
Nominal frequency50 - 60 Hz
max. permissible operating voltage720 V
Test voltage3 kV / 1 min
Thermal rated continuous currentIcth = 1,2 x Ipr
Thermal rated short-time withstand currentIth = 60 x Ipr
Rated impulse currentIdyn = 2,5 x Ith
Overcurrent rating (FS)n < 5
Insulation classE / F / H
Normative standardsIEC 61869 Teil 1 + 2 / DIN EN 42600
HousingGehäuse aus selbstverlöschendem PA66 V0 nach UL 94

Environmental conditions

Installation locationIndoor use
Ambient temperature (operation)-40°C ... +60°C
Ambient temperature (storage / transport)-40°C ... +60°C
Altitudeup to 1000 m

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