Circutor M78031 TP10 Split Core Current Transformer 500/5A, 80x120mm

The Circutor TP10 500/5 (code M78031) is a split-core measurement current transformer rated for a 500/5 A transformation ratio on single-phase systems. Its hinged split core allows the unit to be fitted around an existing conductor or busbar without interrupting the supply, making installation straightforward on live equipment. The transformer accommodates flat busbar sections up to 80 × 120 mm and an inner diameter of 80 mm.

Technical specifications:

• Model: TP10 500/5
• Circutor code: M78031
• EAN: 8433059401580
• Transformer type: Split core
• System: Single-phase
• Transformation ratio: 500/5 A
• Flat strip (busbar) dimensions: 80 × 120 mm
• Inner diameter: 80 mm
• Class 1 power: 4 VA
• Class 3 power: 12 VA
• Safety factor (SF): 10
• Insulation voltage between terminals S1-S2: 3 kV
• Operating voltage: 0.72 kV~ max
• Nominal frequency: 50 / 60 Hz
• Thermal short-circuit current (Ith): 60 In
• Dynamic current (Idyn): 2.5 Ith
• Overall dimensions (W × H × D): 158 × 51 × 193.8 mm
• Enclosure material: Self-extinguishing plastic, class V0
• Mounting: Wall mount or DIN rail (via accessory)
• Weight: 0.55 kg
• Thermal class: B (+130 °C)
• Protection class: IP 20
• Working temperature: -5 to +40 °C
• Storage temperature: -40 to +85 °C
• Relative humidity (non-condensing): 15 to 85 %
• Maximum installation altitude: 1000 m
• Standards: UNE-EN 61869-1, UNE-EN 61869-2, UL 94

Features and benefits:

• Split core design permits fitting to live conductors without shutting off power or dismantling the installation, reducing downtime and safety risk.
• Integrated safety lock on the TP10 model prevents the core from opening accidentally once closed around the conductor.
• Sealable output terminals help maintain measurement integrity and support tamper-evident installations.
• Cable fastening accessories are included in the package, simplifying final installation on site.
• Self-extinguishing V0 plastic housing reduces fire propagation risk in enclosed switchboard environments.

Applications:

• Retrofitting current measurement to live busbars or cables in switchboards and distribution panels where a power interruption is not permitted.
• Feeding 5 A secondary circuits to energy meters, power analysers, or protection relays in single-phase installations.
• Monitoring current draw in industrial machinery panels without process shutdown.
• Upgrading existing installations with metering or power-quality monitoring equipment alongside operating loads.

Also known as: Circutor TP10 500/5, TP10 500/5 M78031, Circutor M78031, split core current transformer 500A 5A, split core CT 500/5.