Current transformer 250/5A class 0.5

The current transformer with an opening core OSCTK-25 250/5A is a precise measuring device of class 0.5, designed to proportionally change the current intensity of 250 A to a standard value of 5 A, suitable for the measurement ranges of energy meters, network analyzers, and automation systems. The clamped structure of the OSCTK-25 housing with a 25 mm opening allows for quick installation on an existing conductor.

The OSCTK-25 250/5A transformer ensures an accuracy class of 0.5 and an apparent power of 2.5 VA. The improved magnetic core with low losses guarantees stable operation in temperatures ranging from -25 to +75 °C. A measuring cable of 2x0.51 mm² with a length of 200 cm is included in the package. Its compact dimensions and weight of 0.2 kg facilitate installation in limited spaces of switchboard panels.

Technical Data

• Ratio: 250/5A
• Accuracy Class: 0.5
• Apparent Power: 2.5 VA
• Housing: OSCTK-25, hole diameter 25 mm
• Operating Voltage: ≤0.72 kV
• Rated Input: 1-800 A
• Rated Output: 5A/1A/mA/mV
• Frequency: 50 Hz-60 Hz
• Operating Temperature: -25°C to +75°C
• Relative Humidity: <90% at 40°C
• Withstand Voltage: 4000 V/1 mA/1 min (50 Hz)
• Protection Category: CAT III
• Connection S1/S2: 2x0.51 mm², L=200 cm
• Insulation Resistance: ≥1 MΩ @ DC 500 V
• Weight: 0.2 kg
• Standards: IEC/EN 60044-1

Applications

• Current measurement in low voltage power installations
• Collaboration with energy meters and network analyzers
• Distribution boards and control cabinets in industrial and commercial facilities

Installation

• Opening clamp core - installation without interrupting the circuit
• No need to dismantle the busbar
• Dimensions of OSCTK-25: width 48 mm, depth 55.5 mm, height 65.5 mm