ALO Plug-On CT Series

The series with integrated short-circuit bridge

  • ✓Integrated short-circuit bridge as standard
  • ✓Quick DIN rail mounting
Discover ALO series →

Latest

New products

New
KALO

KALO

Split-core current transformer

New
RALO

RALO

Rogowski coil

CEL-NA-S

CEL-NA-S

Grid and system protection

ALO

ALO

Plug-on current transformer

Selection guide

Find the right transformer

Transformer finder

Four questions – matching article numbers.

Start the assistant
Cable cross-section for the burdenWhich cross-section does the measuring cable need so that the rated burden is sufficient? The counterpart to the VA calculator.
Which accuracy class do I need?Permissible current error and phase displacement of the classes to IEC 61869-2 – including partial load, where the differences are largest.
Check short-circuit withstandWill the transformer withstand the fault current of your installation? Converts the rated short-time current to your clearing time.
VA calculatorWhich burden results from lead length, cross-section and the connected instrument? Work it out here.

CELSA Messgeräte

Why CELSA measuring devices?

Current transformers made in Germany

Our current transformers are manufactured in Germany and meet high requirements for accuracy, safety and durability.

Broad range of measuring technology and grid protection

In addition to current transformers, we offer energy meters, digital and analogue measuring instruments, summation current transformers, transducers, hour meters, shunt resistors and the CEL-NA-S grid protection relay – all coordinated with each other.

Practical, application-oriented consultation

We support you in selecting the right devices for your application in power supply and industry.

Range

Product categories

Current transformer
Current transformer
Summation current transformer
Summation current transformer
Rogowski coil
Rogowski coil
Energy meter
Energy meter
Digital measuring instrument
Digital measuring instrument
Operating hours meter
Operating hours meter
Analog measuring devices
Analog measuring devices
Measuring transducer
Measuring transducer
Shunts
Shunts
Grid protection
Grid protection

Applications

Typical applications

CELSA measuring instruments are used wherever energy is distributed, measured and monitored.

Utilities & municipal works

Utilities & municipal works

Reliable measurement and protection technology for grids and substations.

Industry & plant engineering

Industry & plant engineering

Measurement and grid protection solutions for industrial power distribution and machinery.

Renewable energy

Renewable energy

Grid protection and metering for PV, CHP, storage as well as wind and hydro power.

FAQ

FAQ about Current Transformers

Which types of current transformers does CELSA offer?
We manufacture busbar current transformers, wound-primary transformers, split-core transformers as well as summation and protection transformers.
What should be considered when selecting a current transformer?
Key factors are the transformation ratio, the required burden (power in VA), and the accuracy class (e.g., class 0.5 or 0.2s).
Where are your current transformers manufactured?
Our current transformers are manufactured in Germany. This ensures high production quality, short delivery routes and close quality control.

Still have questions?

Tell us what you need to measure and we will suggest the right transformer. Usually answered the same working day.

Send an enquiry

Or call: +49 6232 66291-0

Go deeper

Fundamentals, selection guides and calculators for current measurement.

To the knowledge base →