How Does The Waterproof Current Transformer Work？

A split-core waterproof current transformer (SCWCT) is a specialized electrical measuring device that combines split-core convenience with waterproof protection. It addresses current monitoring challenges in wet, dusty, or outdoor environments where traditional current transformers (CTs) are hard to install or prone to failure. Unlike conventional CTs with integrated cores, its split magnetic core can be clamped around the measured conductor without power interruption, significantly boosting installation efficiency. With waterproof ratings typically IP65, IP67, or IP68, it effectively blocks moisture, dust, and salt spray, ensuring stable operation in harsh conditions.

Structurally, SCWCTs consist of a split magnetic core (high-permeability silicon steel or amorphous alloy), primary/secondary windings, a sealed housing, and waterproof cable glands. A reliable locking mechanism ensures the split core closes tightly post-installation, preserving magnetic circuit integrity and measurement accuracy. The housing, made of corrosion-resistant materials (stainless steel, reinforced engineering plastic, or epoxy resin), is fully sealed with high-quality gaskets and encapsulants at core joints and cable outlets. It operates via electromagnetic induction: primary current generates magnetic flux in the core, and the secondary winding induces a proportional low current (5A or 1A) for measurement, protection, and control—consistent with standard CTs.

Its dual advantages enable wide applications. In outdoor power distribution, current transformer are installed on overhead lines, outdoor distribution boxes, and cable wells, enabling quick, power-free installation for line current monitoring, overcurrent protection, and energy metering, resistant to rain, snow, and high humidity.

In renewable energy (solar farms, wind power plants), they are deployed in outdoor inverters and transmission lines, easily mounted on existing cables to monitor photovoltaic and wind turbine currents in open, harsh environments. In industrial production, they suit food processing washdown areas, humid textile workshops, and corrosive chemical plants, monitoring motor currents without disrupting production.

Additionally, SCWCTs serve municipal infrastructure (water treatment, sewage pumping, street lighting) and marine engineering (ships, offshore platforms), resisting salt spray. They are also ideal for construction site temporary power systems, requiring quick installation and outdoor waterproofing.