Circutor M74025 TQ-6 Split Core Current Transformer 150/5A, 20x30mm

The Circutor TQ-6 (code M74025) is a single-phase split core current transformer with a 150/5 A transformation ratio and a 20 × 30 mm busbar aperture. Its button-opening split core construction allows it to be fitted directly onto live cables or busbars without cutting power. Rated 1 VA at accuracy Class 3, it is suited to energy metering and current monitoring panels.

Technical specifications:

• Model: TQ-6
• Circutor code: M74025
• EAN: 8433059299675
• Transformer type: Split core, button opening
• System: Single-phase
• Transformation ratio: 150/5 A
• Primary current: 150 A
• Rated power: 1 VA (Class 3)
• Safety factor (SF): 10
• Insulation voltage between terminals S1-S2: 3 kV
• Maximum operating voltage: 0.72 kV~
• Nominal frequency: 50/60 Hz
• Thermal short-circuit current (Ith): 60 In
• Dynamic current (Idyn): 2.5 Ith
• Busbar aperture (flat strip): 20 × 30 mm
• Dimensions (W × H × D): 80 × 98.5 × 28 mm
• Weight: 0.24 kg
• Enclosure: V0 self-extinguishing plastic
• Protection class: IP 20
• Thermal class: Class B (+130 °C)
• Working temperature: -5 to +40 °C
• Storage temperature: -40 to +85 °C
• Relative humidity (no condensation): 15 to 85%
• Maximum installation altitude: 1000 m
• Mounting: Wall or DIN rail (accessory required for DIN rail)
• Standards: UNE-EN 61869-1, UNE-EN 61869-2, UNE 21031, UL 94

Features and benefits:

• Split core button-opening design eliminates the need to de-energise the circuit during installation, reducing downtime and risk.
• V0 self-extinguishing plastic housing meets UL 94 flammability requirements, suitable for enclosed panel environments.
• Certified to UNE-EN 61869-1 and UNE-EN 61869-2, confirming measurement accuracy and electrical safety compliance.
• Compatible with wall mounting or DIN rail (via optional accessory), giving flexible placement options inside switchboards.
• Wide storage temperature range of -40 to +85 °C makes it suitable for transport and storage in demanding climates.

Applications:

• Current measurement on live single-phase circuits where interrupting the supply is not permitted.
• Feeding 5 A secondary signals to energy analysers, meters, and protection relays in switchboards.
• Monitoring cables and flat busbars up to 20 × 30 mm in industrial and building-installation panels.
• Retrofit installations where adding instrumentation to existing live conductors must be carried out safely.

Also known as: Circutor TQ-6, TQ-6 M74025, split core current transformer 150/5A, button opening CT 150A, Circutor M74025.