Primary winding current transformer, type WSK

Transcription

1 Technical documentation winding transformer, type DEIF /S Frisenborgvej 33 DK-7800 Sive Tel.: Fax: Document no.: D

2 Current transformers overview Clic on a product name or chec mar to jump to information page. Page Page nominal 30* 40* 40 N* N 31.5 nominal conductor in mm Round conductor in mm Transform. width in mm * For the transformers above, clic-on mountings are available for fitment onto 35mm DIN-rails (DIN 50022). conductor in mm Round conductor in mm Transform. width in mm 2

3 winding transformer Based on the physical operating principle of transformers, the required core volume transferring an amount of power, increases rapidly with a decreasing nominal. s there are limits on increasing the transformer size, winding transformer are being used. Interim transformers also belong to the group of winding transformer. This construction is mainly used for primary s of up to 10, and achieves a transformation at a higher or lower secondary values. In addition to their application in adapting a measuring circuit on existing measuring units, interim transformers are being used also for lowering the power loss by the transmission of analogically measured values over great distances. This is made possible by means of a squared dependence of the power loss from the flowing. PV = I 2 Z[V] apparent power [V] This means when the original nominal is halved, the conductor loss drops down to 25% of its original value. Indication: The selection of the nominal power of the initially activated main transformer is achieved through the application of the following measurement comparisions. 2 I P GH = P Z ( 2 ) I 1 + P E + P HZ P GH P Z P E P HZ I 1 I 2 apparent power of the main transformer secondary performance of the interim transformer (nominal performance inclusive of conductor losses) consumption of the interim transformer by nominal conductor losses between main- and interim transformer by nominal primary nominal of the interim transformer secondary nominal of the interim transformer 3

4 winding transformer 30 Secondary ccuracy class ccuracy class V rt.-no. rt.-no. rt.-no. rt.-no (1.3 7 ) (1.1 8 ) (1.8 5 ) (2.4 4 ) (2.4 0 ) l (3.0 9 ) (2.9 7 ) - P 1 M a d e in G erm any x x x x x x x xxx xxx (2.3 6 ) g ( lbs) DIN rail mounting Item number: Sealed shutter Type:

5 winding transformer 40 Secondary (1.7 7 ) (1.5 7 ) (2.2 4 ) (2.8 3 ) ccuracy class ccuracy class V rt.-no. rt.-no. rt.-no. rt.-no (2.7 9 ) l (3.4 8 ) (3.3 6 ) - P 1 M a d e in G erm any x x x x x x x xxx xxx (1.9 7 ) (2.7 5 ) g ( lbs) DIN rail mounting Item number: Sealed shutter Type:

6 winding transformer 40 N Secondary ccuracy class ccuracy class V rt.-no. rt.-no. rt.-no. rt.-no (2.1 6 ) (1.9 6 ) (2.6 7 ) (3.2 2 ) (2.7 7 ) l (4.3 3 ) (4.3 1 ) - P 1 M a d e in G erm any x x x x x x x xxx xxx (1.9 6 ) (2.7 5 ) g ( lbs) DIN rail mounting Item number: Sealed shutter Type:

7 winding transformer 60 Secondary (1.7 7 ) ccuracy class ccuracy class V rt.-no. rt.-no. rt.-no. rt.-no (2.3 6 ) (3.0 3 ) (3.6 2 ) (2.7 9 ) L (1.9 7 ) (2.7 5 ) g ( lbs) DIN rail mounting Not available Sealed shutter Type:

8 winding transformer 70.6 N Secondary (1.7 7 ) (2.3 6 ) (3.0 3 ) (3.6 2 ) (2.7 9 ) ccuracy class ccuracy class V rt.-no. rt.-no. rt.-no. rt.-no. V e d M 8 x 2 5 m m M 1 0 x3 0 m m (3.4 8 ) (3.3 6 ) L L (1.3 7 ) (1.9 6 ) (2.7 5 ) (3.3 8 ) (4.5 6 ) (5.3 5 ) g ( lbs) DIN rail mounting Not available Sealed shutter Type:

9 winding transformer 31.5 Secondary (1.6 9 ) L -H 2 -P (1.9 6 ) (2.7 6 ) (2.5 2 ) ccuracy class ccuracy class V rt.-no. rt.-no. rt.-no. rt.-no L (1.2 2 ) (3.9 3 ) (2.0 4 ) (2.5 5 ) (3.6 2 ) (4.5 2 ) g ( lbs) DIN rail mounting Not available Sealed shutter Type:

10 Current transformers ccessories for DCT Test certificate On request, we can provide you with a test certificate for a specific transformer along with the CT. Please inform us when placing your order. Sealed shutter On request, we can supply a transparent plastic cover. The cover seals the connections on the CT in a way that leaves the type label visible. Please chec availability on each individual data sheet. Excitation curve On request, we can provide you with an excitation curve for a specific transformer along with the CT. Please inform us when placing your order. Optional frequency Frequency range for a standard CT is 50-60Hz. On request, we can provide you with a frequency range from 16 2/3 400Hz. Please inform us when placing your order. Cast resin Cast resin is standard for all CT s with a nominal >4,000. On request, all CT s with a nominal <4,000 can be produced with cast resin. Please inform us when placing your order. The min. and max. weight specification for each type refers to standard versions. The specification is different if cast resin is ordered for CT s <4,000. Mounting Foot angle for screw mounting and busbar mounting screws with isolating protection caps are supplied along with the CT. DIN-rail mounting for tubes, plug-ins and protection transformers is available on request for certain CT types. Please chec availability on each individual data sheet. 10