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33744 Wohner current transformer 150 A / 5 A
Wöhner 33744 CT5 current transformer with a 150 A primary rating, 5 A secondary output, 1.5 VA rated power and class 1 accuracy for industrial current monitoring and metering.
£85.83
Why Choose the Wöhner 33744 Current Transformer?
The Wöhner 33744, manufacturer part number 33744 000, is a precision 150 A / 5 A current transformer designed for accurate current measurement in industrial low-voltage distribution and monitoring systems. Featuring a 1.5 VA rated output and accuracy class 1, it provides a dependable secondary signal for compatible meters, monitoring equipment and control systems.
Built in the compact CT5 frame size, the Wöhner 33744 is suitable for applications associated with NH sizes 1 to 3. Its compact dimensions allow it to be integrated into professional switchgear and electrical distribution assemblies where space-efficient current measurement is required.
The transformer provides a standard 5 A secondary output from a 150 A primary current and is supplied with 2.5 mm² connection leads measuring 1.5 metres. Its halogen-free construction, class B insulation and compliance with IEC current-transformer standards make it suitable for demanding commercial and industrial installations.
Key Advantages
- Accurate 150 A / 5 A current transformation ratio.
- Accuracy class 1 for dependable monitoring and metering.
- Rated secondary apparent power of 1.5 VA.
- Compact CT5 frame size.
- Suitable for applications associated with NH sizes 1 to 3.
- Supplied with pre-fitted 1.5-metre connection leads.
- Thermal short-time current rating of 9 kA.
- Halogen-free construction for modern electrical assemblies.
Key Features
- Primary rated current: 150 A.
- Secondary rated current: 5 A.
- Rated output: 1.5 VA.
- Current accuracy class: 1.
- Over-current limitation factor: FS5.
- Maximum operating voltage: 720 V.
- Insulation class: B.
- Pre-wired with 2.5 mm² leads.
- Compact dimensions of 49 × 27 × 70 mm.
Reliable Current Measurement for Industrial Systems
The Wöhner 33744 converts a primary current of up to 150 A into a proportional 5 A secondary signal that can be processed by compatible ammeters, multifunction meters, energy-management systems and monitoring equipment. This enables electrical loads to be measured safely without routing the full primary current through the measuring instrument.
Its class 1 measurement accuracy makes the transformer suitable for general monitoring and operational metering applications. The FS5 over-current limitation factor helps protect connected measuring instruments by limiting the secondary current under high primary-current conditions.
With a thermal short-time current rating of 9 kA and class B insulation, the transformer is engineered for dependable performance in industrial switchboards and distribution equipment. The supplied connection leads also help reduce wiring time during panel construction and maintenance.
Typical Applications
- Industrial switchboards.
- Low-voltage power distribution systems.
- Electrical current monitoring.
- Multifunction power meters.
- Energy-management systems.
- Motor control centres.
- Commercial distribution boards.
- OEM machinery and automation panels.
- Load monitoring and preventative maintenance.
- NH size 1 to 3 switchgear assemblies.
Technical Specifications
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| Current | 150 A | |
|---|---|---|
| Manufacturer | Wöhner | |
| Part number | 33744 000 | |
| SKU | 33744 | |
| Product type | Current transformer | |
| Product system | Measurement Technique | |
| Frame size | CT5 | |
| Associated equipment sizes | NH sizes 1 to 3 | |
| Primary rated current | 150 A | |
| Secondary rated current | 5 A | |
| Transformer ratio | 150/5 A | |
| Secondary rated apparent power | 1.5 VA | |
| Accuracy class | Class 1 | |
| Maximum operating voltage | 720 V | |
| Thermal short-time current | 9 kA | |
| Over-current limitation factor | FS5 | |
| Insulation class | B | |
| Typical power dissipation at 80% load | 1.0 W | |
| Power dissipation at full load | 1.5 W | |
| Connection | Pre-fitted leads | |
| Lead cross-section | 2.5 mm² | |
| Lead length | 1.5 m | |
| Dimensions | 49 × 27 × 70 mm | |
| Weight | Approx. 0.14 kg | |
| Sealable | No | |
| Material properties | Halogen-free | |
| Pack quantity | 1 | |
| EAN | 4021267337445 | |
| ECLASS 14.0 | 27210902 | |
| ETIM 5.0 / 8.0 / 10.0 | EC002048 | |
| Standards | IEC 61869-1:2007 and IEC 61869-2:2012 |
Frequently Asked Questions
What is the Wöhner 33744 used for?
The Wöhner 33744 is a current transformer used to convert a primary current of 150 A into a standard 5 A secondary signal for electrical monitoring and metering equipment.
What is the transformer ratio of the Wöhner 33744?
The transformer has a ratio of 150 A / 5 A, equivalent to a transformation ratio of 30:1.
What accuracy class does the Wöhner 33744 provide?
The Wöhner 33744 has a class 1 current accuracy rating, making it suitable for general operational monitoring and metering applications.
What is the rated output of the current transformer?
The rated secondary apparent power is 1.5 VA.
Does the Wöhner 33744 include connection leads?
Yes. It is supplied with 2.5 mm² pre-fitted leads measuring 1.5 metres.
What does the FS5 rating mean?
FS5 is the over-current limitation factor. It indicates that the transformer is designed to limit the secondary current during high primary-current conditions, helping protect connected measuring instruments.
Which standards does the Wöhner 33744 comply with?
The current transformer is manufactured in accordance with IEC 61869-1:2007 and IEC 61869-2:2012.
Trusted Measurement Technology for Professional Switchgear
Wöhner current transformers provide panel builders, electrical engineers and system integrators with reliable current measurement, compact installation and dependable integration into industrial power distribution assemblies.
