Measuring current transformer for universal measuring devices

Product catalog summary

Product Description
Measuring current transformers are designed for universal measuring devices in the PEM series, compatible with standard transformers with secondary currents of 1 A or 5 A. To maintain accuracy class 0.5 S, both the measuring device and transformers must meet this standard or better.

Standards
The transformers comply with IEC 61869-1, IEC 61869-2, and IEC 61010-1 standards.

Device Features

CTB31/CTB41/CTB51: Window-type transformers with screwless, maintenance-free connections, suitable for up to 1.2 kV and 690 V systems, housed in a flame-resistant plastic enclosure.
KBR18/KBR32: Split-core transformers that can be mounted without disconnecting the primary conductor, with a maximum operating voltage of 0.72 kV.

Technical Data

CTB41/CTB51/CTB31: Rated continuous thermal current of 1.2 x IN, short-time thermal current of 60 x IN for 1 second, max operating voltage of 1.2 kV, insulation test voltage of 6 kV, nominal frequency of 50/60 Hz, insulation class E, operating temperature range of -5 to 50 °C.
KBR18/KBR32: Similar specifications with a max operating voltage of 0.72 kV and insulation test voltage of 3 kV.

Ordering Details
Detailed ordering information is provided for various primary and secondary current configurations, accuracy classes, and model numbers for both window-type and split-core transformers.

Selection Guide
The guide assists in selecting the appropriate transformer based on secondary current and measuring device compatibility, noting that using a 1 A secondary current on a 5 A input device may reduce accuracy by one class.

Dimension Diagrams
Dimensions for CTB51, CTB41, CTB31, KBR18, and KBR32 are provided, detailing installation width, height, and depth for various busbar and circular conductor configurations.

Catalog excerpts

Measuring current transformer for universal measuring devices

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Measuring current transformer for universal measuring devices Product description All measuring devices of the PEM series can be operated with standard measuring current transformers (secondary current 1 A or 5 A). To comply with the accuracy class (e.g. 0.5 S), the measuring device and the measuring current transformers used must comply with class 0.5 S or better. The measuring current transformers were designed in accordance with the following standards: Rated continuous thermal current /cth Rated short-time thermal current /th Max. operating voltage Um Insulation test voltage Nominal frequency...

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Measuring current transformer for universal measuring devices Ordering details window-type current transformer

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Measuring current transformer for universal measuring devices-4

Measuring current transformer for universal measuring devices Z BENDER

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Measuring current transformer for universal measuring devices

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BENDER Group Measuring current transformer-PQ_D00231_02_D_XXEN / 04.2022 / © Bender GmbH & Co. KG, Germany – Subject to change! The specified standards take into account the edition valid until 04.2022 unless otherwise indicated. Bender GmbH & Co. KG Londorfer Straße 65 • 35305 Grünberg • Germany Tel.: +49 6401 807-0 • [email protected] • www

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