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SIEMENS 4NC5223-2CE21 Fuse

Item NO.:
4NC5223-2CE21
Market Price:
$500
Product Origin:
Germany
Color:
NEW
Product weight:
0.01KG
Lead Time:
In stock

Important: The SIEMENS 4NC5223-2CE21 is not a fuse. It is a SENTRON 4NC bushing-type current transformer (CT) for electrical current measurement. Siemens specifies a 250/5 A ratio, 5 VA rated power, and Class 1.0 accuracy.

Key Technical Specifications

Specification	Details
Manufacturer	SIEMENS
Model	4NC5223-2CE21
Series	SENTRON 4NC
Product Type	Bushing-Type Current Transformer
Primary Current	250 A
Secondary Current	5 A
Transformation Ratio	250/5 A
Rated Power	5 VA
Accuracy Class	Class 1.0
Rated Frequency	50/60 Hz
Maximum Equipment Voltage	720 V AC
Insulation Voltage	3 kV
Overcurrent Factor	FS 5
Internal Opening	28 mm
Opening Height	30 mm
Width	60 mm
Height	78.5 mm
Depth	65 mm
Connection	Screw terminals
Protection Rating	IP20
Mounting	Screw fixing
Operating Temperature	-30 to +55 °C
Weight	Approx. 0.33 kg

Siemens confirms the 250 A primary / 5 A secondary configuration, 5 VA rated output and Class 1.0 accuracy.

Advantages & Features

Original Siemens SENTRON current transformer
250/5 A transformation ratio
Class 1.0 measurement accuracy
5 VA rated secondary power
Compact bushing-type construction
28 mm maximum conductor opening
Touch-protected design
Suitable for power measurement and monitoring
Compatible with power monitoring systems such as SENTRON PAC

Typical Applications

Electrical power measurement
Energy monitoring
SENTRON PAC power monitoring systems
Industrial distribution panels
Motor current monitoring
Factory automation
Electrical control cabinets

Installation & Usage Notes

This is a current transformer, not a fuse.
Ensure the primary conductor passes correctly through the CT opening.
The secondary output is rated 5 A.
Verify the CT ratio and polarity before commissioning.
Do not leave the CT secondary circuit open while current is flowing through the primary.
Maximum conductor diameter should not exceed approximately 28 mm.
Install in an appropriate indoor electrical enclosure; the unit is rated IP20.