SPECIFICATIONS

Product name:Zct series zero sequence current transformer

Available models:

• Zct-50 (100 a)

• Zct-80 (200 a)

Category:Protection relay accessory / zero sequence current transformer

Aperture (inner hole diameter - optional):
50 mm, 80 mm

Rated operating current (optional)
100a, 200a

Mounting method:
Screw mounting

Zct series zero sequence current transformer

Product overview

The zct series is a range of high-precision zero sequence current transformers (also known as core balance current transformers) designed for earth leakage protection systems. these devices detect residual currents in ac power distribution networks and provide critical input signals to leakage protection relays, enabling rapid fault identification and circuit isolation.

Available in two models with different aperture sizes and rated currents, the zct series offers flexible solutions for a wide variety of industrial, commercial, and residential applications.

Models available:

Key features

• High sensitivity– accurately detects zero sequence currents caused by earth leakage faults, ensuring reliable protection system activation.

• Two aperture options– choose between 50mm (zct-50) and 80mm (zct-80) inner diameters to accommodate different cable sizes and busbar configurations.

• Two current ratings– available in 100a (zct-50) and 200a (zct-80) rated currents to match various system load capacities.

• Screw mounting design– equipped with pre-drilled mounting holes for quick and secure panel installation using standard screws.

• Compact and durable construction– built with high-quality insulating materials, offering excellent electrical insulation and long-term operational reliability.

• Wide compatibility– designed to work seamlessly with most residual current relays, leakage protection relays, and earth fault monitoring devices on the market.

Technical specifications

Applications

• Düşük gerilim dağıtım panellerinde kaçak akım koruma sistemleri

• Residual current monitoring in industrial motor control centers.

• Ground fault detection in commercial building electrical systems

• Leakage protection for pumping stations and agricultural power networks

• Retrofit and upgrade projects for existing leakage protection installations

Ordering information

When placing an order, please specify:

1. Model (zct-50 or zct-80) – this determines both aperture size and rated current

2. Quantity required.

For detailed installation instructions, wiring diagrams, and safety precautions, please refer to the user manual included with the product.

Installation notes

• The transformer should be installed over all live conductors (phase conductors and neutral) passing through the aperture.

• Ensure the cable or busbar is centered within the hole for optimal measurement accuracy.

• Secure the unit firmly to the mounting panel using appropriate screws (not included).

• The protective conductor (earth/ground wire) must not pass through the transformer aperture.