74000 Series Current Transformers
- Technology
- Current transformers
- Partner
- Myrra
When it comes to robustness and cost, among all the current measurement techniques, current transformers are a convenient solution.
There are 2 different frequency measurement ranges covered by this series of products: AC mains from 50Hz up to 400Hz and switch-mode power supplies from 20 up to 150KHz.
Two current ranges can be defined for this series depending on the mechanical construction: pin primary0 – 25A and thru-hole primary 0 – 250A.
Pin primary means the primary loop which brings the current to measure is coming from PCB net, while thru-hole primary means the loop is made of a cable going through the CT.
These current transformers can also be customised in terms of service and design according to the application’s specific needs.
Range features
A high level overview of what this range offers
- Low cost current transformer
- Pin primary up to 25A
- Through-hole primary up to 250A
- AC mains currents from 50Hz up to 400Hz
- SMPS currents from 20KHz up to 150KHz
- Ferrite shapes E, U, and toroids
- PCB mount or panel mount
- Ratio from 1/25 up to 1/2000
- Typical accuracy at 1%
- Construction conformity to CEI950, CEI335, CEI61558 for reinforced insulation, creepage distance 8mm
What’s in this range?
All the variants in the range and a comparison of what they offer
| Application | Frequency range | Primary loop | Core shapes/ size | Ratio | Current range |
|---|---|---|---|---|---|
AC Mains | 50 – 400Hz | Pin primary | E19, E25, and U10.5 | 1/350 – 1/2000 | 4A – 25A |
AC Mains | 50 – 400Hz | Through-hole | T18, T30, and T40 | 1/500 – 1/1000 | 10A – 250A |
SMPS | 20 – 150KHz | Pin primary | E13, E19, E25, U10.5, and T13 | 1/25 – 1/100 | 10A – 25A |
SMPS | 20 – 150KHz | Through-hole | T18, T30, and T40 | 1/50 – 1/200 | 15A – 200A |
