05-Current Transformers
59Pages

energy management systems Current Transformers

CURRENT TRANSFORMERS Current transformers with analogue output Current transformers - Classic Line Protective current transformers - Classic Line Current transformers - AST Line Certificable current transformers Summation current transformers Split core current transformers Current transformers with fused terminal Flexible current transformers on request

CURRENT TRANSFORMERS Current transformers are electrical equipment, that convert primar currents to proportional secondary currents that are appropriate to the connected measuring instruments. Current transformers have a primary winding to which the current to be measured is fed. Measuring instruments are connected to a secondary winding. Current transformers are used for measuring and protecting applications. It is recommended to apply current transformers for currents of 40 A or higher..

Current Transformer and transducer in one housing • Up to 600 A • Standard analogue output 0(4)-20 mA / 0(2)-10 V Application The measured quantity (i.e. primary current) is galvanically insulated (5kV/1 min), rectified (mean value principle) and converted into a proportional and load-independent DC signal current (or voltage). The passive type SMU does not require auxiliary supply. The active SMU/I connects to a auxiliary supply of 230 VAC or 24 VDC. These information have to indicated on the order. SMU: Design with 0-20 mA or 0-10 V output without auxiliary supply SMU/I: Design with...

Current Transformer and transducer in one housing • Up to 1500 A • Standard analogue output 0(4)-20 mA / 0(2)-10 V SMK/SMG Application The measured quantity (i.e. primary current) is galvanically insulated (5 kV/1 min), rectified (mean value principle) and converted into a proportional and load-independent DC signal current (or voltage). The passive type SMK/SMG does not require auxiliary supply. The active SMK/I or SMG/I connects to a auxiliary supply of 230 VAC or 24 VDC. These information have to indicated on the order. SMK - SMG: Design with 0-20 mA or 0-10 V output without auxiliary...

CURRENT TRANSFORMERS NOTES

CU-cable consumption between the measurement instrument and the Copper bars' ampacity according to DIN 43671 current transformer

Application Current transformers convert an alternating current, usually of high value, into a proportional secondartcurrent of lower value, which is appropriate to be measured by standard instruments of rated currents 5 or 1 A. CELSA transformers are suitable for indoor use in low-voltage networks, and they are built according to IEC 60044-1 and BS 3938. Current transformers are applied for measuring and protection. It is indicated to use current transformers for currents from 40A. Accucary (according to IECn 60044-1) CELSA current transformers fulfil the specifications of the accuracy...

WINDOW TYPE CURRENT TRANSFORMER Round conductor 0 16 mm Primary bar 20 x 5 mm IBA Technical Features, Executions IBP WINDOW TYPE CURRENT TRANSFORMER Round conductor 0 22 mm Primary bar 30 x 10 mm IBP Technical Features, Executions

WINDOW TYPE CURRENT TRANSFORMER Round conductor IB Technical Features, Executions IB-50 WINDOW TYPE CURRENT TRANSFORMER The rated burden of this type is higher than the type IB. IB-50 Technical Features, Executions

WINDOW TYPE CURRENT TRANSFORMER For round conductor 0 40 mm the type IBG/1 is available. IBG Technical Features, Executions IBG-50 WINDOW TYPE CURRENT TRANSFORMER The rated burden of this current transformer is higher than the type IBG. Round conductor 0 30 mm

WINDOW TYPE CURRENT TRANSFORMER Round conductor 0 44 mm Primary bar 50 x 15 mm 2 x 40 x 10 mm IBR Technical Features, Executions IBR/1 WINDOW TYPE CURRENT TRANSFORMER Round conductor 0 44 mm Primary bar 60 x 12 mm 2 x 50 x 10 mm IBR/1 Technical Features, Executions

WINDOW TYPE CURRENT TRANSFORMER For round conductors 0 80 mm the type IER/1 is available Round conductor 0 50 (80) mm Primary bar 80 x 10 mm2 x 60 x 10 mm IER

WINDOW TYPE CURRENT TRANSFORMER Primary bar 2 x 100 x 10 mm IER/4 Technical Features, IRP WINDOW TYPE CURRENT TRANSFORMER On request: Seconday terminals on the long side of the current transformer Primary bar 100 x 20 mm IRP Technical Features, Executions

WINDOW TYPE CURRENT TRANSFORMER On request: Seconday terminals on the long side of the current transformer Primary bar 2 x 100 x 10 mm IRM Technical Features, Executions ICM WINDOW TYPE CURRENT TRANSFORMER Primary bar 3 x 100 x 10 mm2 x 100 x 20 mm ICM Technical Features, Executions

WINDOW TYPE CURRENT TRANSFORMER Primary bar 3 x 130 x 20 mm 4 x 130 x 10 mm ICG Technical Features, Executions Included in delivery: Primary fixing device IBO WOUND PRIMARY CURRENT TRANSFORMER Form A IBO Technical Features, Executions mary rated current A Accesories (see page 5/53): Mounting feet / snap on mounting bracket EN 50022-35

While measurement current transformers are used to go into saturation above the nominal current range (shown in the excess current limiting factor FS) to prevent the increasing of the secondary current in case of system fault (e. g. primary short circuit) and to protect the equipments in the secondary circuit, a protective c.t. is used to have a saturation far away from its nominal current range in order to protect the switchgear etc. by using distance relays, overcurrent relays etc. Rated accuracy classes are 5P and 10P. "P" means "protection". The excess current limiting factor (in %) is...

IBG-50 Protective current transformers IBG-50 Technical Features, Executions Rated currents: 150 - 1000 A • Secondary: 1 A / 5 A Round conductor: 0 31 mm Primary bar: 40 x 10 mm Dimensions: 76 x 105 x 50 mm Primary rated current A Included in delivery: Primary fixing device Accesories (see page 5/53): Mounting feet / snap on mounting bracket EN 50022-35 IBR Protective current transformers IBR Technical Features, Executions Rated currents: 400 - 1500 A Primary rated current A Included in delivery: Primary fixing device Accesories (see page 5/53): Mounting feet / snap on mounting...