CT-300/5-2 Fixed current transformer : Primary 300 A / Secondary 5A - Model 2 - Diameter 23 mm

Closed current transformers with Secondary 5A

COMMON TECHNICAL CHARACTERISTICS

• Housing: self-extinguishing ABS
• Current on secondary side: 5 A (other on request)
• Sampling frequency: 40-60 Hz

• Nominal dynamic short-circuit current (Idin):

  • 2.5 I for 1 sec - Maximum peak value that the TI can withstand with the secondary in short circuit

• Nominal thermal short-circuit current (Iter):

  • 40-80 Ipn for 1 sec - Maximum effective value with secondary in short circuit
• Permanent overcurrent: 1.2 In
• Reference voltage for insulation:
• 0.72 kV maximum voltage value
• Test voltage: 3 kV at 50 Hz for 1 min., maximum voltage value between primary and secondary 
• Safety factor: N <= 5 Saturation factor (Sf) or ratio between the value of the primary current that causes the saturation of the magnetic core and the value of the nominal current. The lower the value of N, the better the protection of the instrument
• Operating temperature: -25°...+50°C
• Storage temperature: -40°...+80°C
• Maximum cable temperature: 70°C
• Relative humidity: 90% max, non-condensing
• Insulation: in air class E
• Protection degree: IP 30
• Construction: According to standards CEI 38-1, IEC 185, VDE 0414, EN60044-1, EN60044-1A

 Use and selection of the correct current transformer

The choice depends on the type of application you are dealing with: a machine, a retrofit on an existing switchboard, or the need for a solution that can also work well without inspection.

Master Chips has various models of current transformers in stock to combine with your network analyzers or to be connected to the energy meters managed by us.

Often, when measuring electricity consumption, the choice of the current transformer is underestimated. This can lead to discomfort during installation by the operator, to introducing measurement errors that can affect the energy measurement of our energy meter. Please refer to our catalogue for more technical information about this item. 

We recommend the version with 333mV secondary for installations remote from the measuring instrument.