Current transformer 150/5A class 0.5

The current transformer with an opening core OSCTK-25 150/5A is a precise measurement device of class 0.5, designed to proportionally change the current intensity from 150 A to a standard value of 5 A, suitable for the measurement ranges of energy meters, network analyzers, and automation systems. The clamp construction of the core allows for installation directly on the existing conductor without breaking the circuit.

The OSCTK-25 150/5A transformer is equipped with an improved magnetic core with low losses and high precision, with an accuracy class of 0.5. A measuring cable of 2x0.51 mm², 200 cm in length, is included in the package. Its compact housing with a hole diameter of 25 mm and a weight of 0.2 kg facilitates installation in crowded distribution boards.

Technical Specifications

• Transformation ratio: 150/5A
• 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 and control cabinets

Installation

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