Circutor M78034 TP10 Split Core Current Transformer 800/5A, 80x120mm

Circutor TP10 800/5 (code M78034) is a single-phase split-core measurement current transformer with an 800 A primary and a 5 A secondary output. The hinged split core opens around conductors and busbars up to 80 x 120 mm, allowing the unit to be fitted to live installations without shutting off the power or dismantling existing wiring. It covers accuracy classes 0.5, 1, and 3 with corresponding maximum burdens of 3 VA, 7 VA, and 18 VA.

Technical specifications:

• Model: TP10 800/5
• Circutor code: M78034
• EAN: 8433059401610
• Transformer type: Split core
• System: Single-phase
• Transformation ratio: 800/5 A
• Busbar / flat strip opening: 80 x 120 mm
• Inner diameter: 80 mm
• Operating voltage: 0.72 kV AC max
• Nominal frequency: 50/60 Hz
• Burden at Class 0.5: 3 VA
• Burden at Class 1: 7 VA
• Burden at Class 3: 18 VA
• Safety factor (SF): 10
• Thermal short-circuit current (Ith): 60 In
• Dynamic current (Idyn): 2.5 Ith
• Insulation voltage S1-S2: 3 kV
• Protection class: IP 20
• Thermal class: B (max +130 °C)
• Working temperature: -5 to +40 °C
• Storage temperature: -40 to +85 °C
• Relative humidity: 15 to 85% (without condensation)
• Overall dimensions (W x H x D): 158 x 51 x 193.8 mm
• Weight: 0.55 kg
• Enclosure: Self-extinguishing plastic, UL 94 V0
• Fastening: Wall-mount or DIN rail (via accessory)
• Maximum installation altitude: 1000 m
• Standards: UNE-EN 61869-1, UNE-EN 61869-2, UL 94

Features and benefits:

• Split-core construction lets the transformer clip onto a live cable or busbar without any circuit interruption, reducing installation downtime to zero.
• The 80 x 120 mm busbar opening accommodates the large flat conductors found in high-current main distribution boards and switchgear.
• An integrated safety lock on the TP10 series prevents the core from opening accidentally once it is closed around the conductor.
• Sealable secondary terminals and cable fastening accessories are supplied with the unit, simplifying wiring and supporting tamper-evident sealing.
• Self-extinguishing V0 plastic enclosure meets UL 94 flammability requirements, making the unit suitable for installation inside enclosed electrical panels.

Applications:

• Current measurement on live LV busbars in main distribution boards where a supply outage cannot be arranged.
• Retrofitting energy metering or power monitoring into existing industrial installations without any service interruption.
• Input sensing for energy meters, power analysers, and protection relays connected to a standard 5 A secondary circuit.
• High-current monitoring in data centres, commercial buildings, or industrial plants that require continuous uptime during instrumentation work.

Also known as: Circutor TP10 800/5, TP10 800/5 M78034, Circutor M78034, split core current transformer 800A, split core CT 800/5 A.