Noratel CTGA Kn CT 400/5A

Core Performance & Industrial Application

The Noratel CTGA Kn is a window-type current transformer rated 400/5 A with a 15 VA burden for metering and protection panels.

It steps primary load current down to a standard 5 A secondary signal for ammeters, energy meters and protection relays.

It provides galvanic isolation between the primary power circuit and the measurement/relay circuit per IEC 60044-1.

The core sits around the primary conductor through the window opening without breaking the cable or busbar.

It is used as spare replacement in low-voltage switchgear and distribution boards.

Technical Specifications

▶ Product type: Measurement current transformer

▶ Brand: Noratel

▶ Model: CTGA Kn

▶ Ratio: 400 / 5 A

▶ Burden: 15 VA

▶ Max operating voltage: 720 V; test voltage 3 kV / 1 min

▶ Frequency: 50 / 60 Hz

▶ Continuous overcurrent: 1.2 × In; thermal 60 × In (1 s); dynamic 2.5 × Ith

▶ Insulation class: E (120℃); encapsulated UL94-V0 housing

▶ Mounting: Window-through primary conductor, panel / DIN rail optional

▶ Standard: IEC 60044-1 (VDE 0414)

▶ Note: Accuracy class and overcurrent factor confirmed from nameplate before ordering

▶ Country of origin: Norway

▶ Compliance: CE, UL certification

Industry Applications

Applied in low-voltage distribution panels, motor feeders and metering circuits current-sensing spare replacement.

Note: Confirm accuracy class, overcurrent factor and window bore against nameplate before ordering