Current transformer 100/5A class 0.5

The current transformer with an opening core OSCTK-25 100/5A is a precision measuring device of class 0.5, designed to proportionally convert large current intensities into values suitable for the measurement ranges of energy meters, network analyzers, and control-measurement devices. The opening clamp core allows for installation on an existing conductor without the need to break the circuit or disassemble busbars.

The OSCTK-25 100/5A transformer is made with an improved magnetic core that has low losses and high precision, ensuring stable parameters over a wide temperature range. A 200 cm long measurement cable with strands of 2x0.51 mm² is included and ready to connect to the measuring device. The clamp structure and compact dimensions facilitate quick installation even in crowded distribution boards.

Technical Data

• Ratio: 100/5A
• Accuracy class: 0.5
• Apparent power: 1.5 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
• Cooperation with energy meters, network analyzers, and protective relays
• Installation in distribution boards, control cabinets, and automation systems

Installation

• Opening clamp core - installation on the conductor without breaking the circuit
• No need for disassembly of the busbar
• Compact dimensions: width 48 mm, depth 55.5 mm, height 65.5 mm