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MERSEN FUSE KIT External CT 250A NH1-3 3P MZ3SW250
Reliable and precise current measurement for three-phase industrial power systems with a 250/5A ratio and Class 1 accuracy. Compatible with NH1-3 switchgear.
Why Choose the Mersen M1024569 External Current Transformer Kit?
The Mersen M1024569 is a complete external current transformer kit designed for accurate three-phase current measurement in compatible NH fuse-switch disconnector systems. Also identified by the catalogue reference MZ3SW250, the kit provides a practical monitoring solution for industrial low-voltage switchboards and Mersen MULTIVERT® fuse systems.
The kit contains three current transformers, allowing the electrical current in all three phases to be measured. Each transformer provides a 250/5 A transformation ratio with Class 1 accuracy, making the assembly suitable for general monitoring, indication and load-management applications.
Designed for installation behind compatible NH size 1 to size 3 fuse-switch disconnectors, the M1024569 includes distance tubes for level adjustment. This manufacturer-designed arrangement supports straightforward integration while helping maintain an organised and compact switchboard layout.
Key Advantages
- Complete three-phase external current transformer kit.
- 250/5 A transformation ratio for industrial current measurement.
- Includes three current transformers for all-phase monitoring.
- Class 1 measurement accuracy.
- Designed for compatible NH size 1 to size 3 fuse-switch disconnectors.
- Installs behind the fuse-switch disconnector to conserve panel space.
- Supplied with distance tubes for convenient level adjustment.
- Supports integration with meters, monitoring equipment and control systems.
Key Features
- Mersen MZ3SW250 external current transformer kit.
- 250 A primary current rating.
- 5 A secondary current output.
- Three-pole current measurement.
- Class 1 accuracy.
- Set contains three current transformers.
- Compatible with NH1, NH2 and NH3 fuse-switch disconnectors.
- Designed for rear installation on compatible fuse-switch equipment.
- Includes distance tubes for installation-height adjustment.
- RoHS-compliant construction.
Reliable Three-Phase Current Measurement
Current transformers reduce high primary currents to a proportional secondary current that can be safely measured by compatible meters, relays and monitoring equipment. The Mersen M1024569 converts primary currents of up to 250 A into a standard 5 A secondary signal for straightforward integration with industrial measurement systems.
By providing one current transformer for each phase, the kit enables operators to monitor phase loading, identify imbalances and evaluate electrical demand. Rear installation behind the compatible fuse-switch disconnector also helps minimise the space required inside the switchboard.
Typical Applications
- Industrial low-voltage switchboards.
- Mersen MULTIVERT fuse systems.
- NH fuse-switch disconnector assemblies.
- Three-phase load monitoring.
- Electrical panel meters and ammeters.
- Power-management and monitoring systems.
- Motor control centres.
- OEM switchboard and panel manufacturing.
Technical Specifications
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| Current | 250 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole | |
| Fuse Type | NH (DIN) | |
| Fuse Size | NH1 | |
| Item number | M1024569 | |
| Catalogue No | MZ3SW250 | |
| Description | Kit External Current transformer 250/5A NH1-3 3P class 1 | |
| EAN/UPC Code | 4027597024079 | |
| RoHS Compliant | Yes | |
| Design Details | current transformer up to 250/5A for triple pole measurement, class 1, set = 3 pieces current transformer with distance tubes for level adjustment, 3 pieces installed in the current transformer | |
| Number of Poles | 3-Pole | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 1.18 kg | |
| Sell Pack Width | 160 mm | |
| Sell Pack Length | 130 mm | |
| Sell Pack Height | 40 mm | |
| Product group | Measurement and monitoring | |
| Product Weight | 1.18 kg | |
| HS Code | 85363090 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen M1024569 used for?
The M1024569 is used to measure current across all three phases of compatible NH fuse-switch disconnector installations.
What is the current transformer ratio?
Each current transformer has a ratio of 250/5 A, converting a primary current of up to 250 A into a proportional 5 A secondary signal.
How many current transformers are included?
The M1024569 kit contains three current transformers, providing one transformer for each phase.
Which fuse-switch sizes are compatible?
The kit is designed for compatible NH size 1, size 2 and size 3 fuse-switch disconnectors.
What is the measurement accuracy?
The current transformers provide Class 1 accuracy, making them suitable for general industrial monitoring and current-indication applications.
Trusted Industrial Current Monitoring
Mersen external current transformers are used by panel builders, electrical engineers and industrial operators to provide dependable current measurement and straightforward integration with compatible NH fuse-switch systems.
