Current transformer 200/5A class 0.5

The OSCTK-25 200/5A current transformer with an opening core is a precise measurement device of class 0.5, designed to proportionally change a current of 200 A to a standard value of 5 A suited for the measurement ranges of energy meters, network analyzers, and automation devices. The clamp-type design of the OSCTK-25 housing with a 25 mm opening allows for installation without interrupting the electrical circuit.

The OSCTK-25 200/5A transformer provides an accuracy class of 0.5 and an apparent power of 1.5 VA. The improved low-loss magnetic core guarantees stable and precise operation throughout the entire operating temperature range. A 2x0.51 mm² measuring cable with a length of 200 cm is included. Compact dimensions and a weight of 0.2 kg make it suitable for crowded distribution boards.

Technical Data

• Transformation ratio: 200/5A
• Accuracy class: 0.5
• Apparent power: 1.5 VA
• Housing: OSCTK-25, hole diameter 25 mm
• Operating voltage: ≤0.72 kV
• Nominal input: 1-800 A
• Nominal 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, network analyzers, and protection relays
• Distribution boards and control cabinets in industrial and commercial facilities

Installation

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