Current Transformer

Type AGU up to 800 kV, 6000 A and up to 10 secondary cores

Current instrument transformer is used to step-down current to defined values and thus provide standardized, usable levels of current in a variety of power monitoring, measurement, and protection applications while insulating the measurement and protection equipment from high system voltage.

Končar started manufacturing current transformers in 1947 and has since acquired extensive experience with over 50,000 units installed worldwide.

The CTs are designed with exceptional longevity and reliability, aiming for at least 50 years of service life.

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Features

Um: 72.5 kV to 800 kV

In: up to 6000 A

Short circuit: up to 100 kA (Idyn: 250 kA peak)

Secondary cores: up to 10

All metering and protection cores

Top core design (low primary winding losses)

Low leakage reactance

Partial discharge free on power-frequency withstand voltage

Stainless steel bellows oil expansion system

Extreme temperature range available (-60 to +60 °C)

Extensive experience in seismically active regions

Minimum oil design

Explosion-safe

Maintenance-free

Accessories

Terminal for measuring dielectric dissipation factor (tg δ)

Oil level indicator

Surge arresters on secondary windings (optional)

Revenue metering secondary terminals can be separately sealed

Transport shock indicators (standard for Um 362 kV, optional for other voltage levels)

Internal overpressure indicator (optional)