【正文】 n The Transport case The vehicle mounting As for the digiPHONE+ the ESG NT has an own vehicle holder. Generally, we offer either the case or the vehicle holder. There is no objection to offer both Scope of Delivery Earth fault probe ESG NT 1 x Display ESGNT 118305933 2 x Earth rods ESGNT 118306692 1 x Test lead 2m red 810003181 1 x Test lead 2m black 810003180 1 x Manual ESG NT 1 x Transport Bag 118302978 1 x Insert transport bag ESG 118306092 Availability Available from May 2023 Versions: ESG NT Combi unit with digiPHONE+ 62 SebaKMT – Product range 4. VLF (Very Low Frequency) CR (Cosine Rectangular) Cable Testing systems: ? Most powerful testing approach, in particular for (very) long cables ? Wave form similar to 50 Hz – power frequency: Strong increase during zerocrossing ? Fully automatic, easy to use system ? Test method according to international standards (c) SebaKMT , all rights reserved (c) SebaKMT, all rights reserved Products VLF CR technology – Portable solutions I VLF CR28 (899005936) 181。F 28 kV 181。F 18 kV 181。F 12 kV VLF CR40B (899004500) 181。F 40 kV 181。F 35 kV 181。F 18 kV VLF CR60B (899007186) VLF CR60BOFFS(890025374) 0,8 181。F 60 kV 1,7 181。F 35 kV 3,0 181。F 18 kV VLF CR60P (899007187) VLF very low frequency CR Cosine Rectangle B Basis P Plus (symmetrical) PZ Pr252。fZusatz (test add on) CEN Centrix OFFS Offshore (grouted HV output line) (c) SebaKMT, all rights reserved Products VLF CR technology – Portable solutions II VLF CR40P (899004501) VLF CR40PPZCEN (890022741) 4,4 181。F 40 kV 5,0 181。F 35 kV 10,0 181。F 18 kV VLF CR60POFFS(890025376) VLF CR60PPZCEN(890022745) 1,6 181。F 60 kV 3,0 181。F 35 kV 5,5 181。F 18 kV VLF very low frequency CR Cosine Rectangle B Basis P Plus (symmetrical) PZ Pr252。fZusatz (test add on) CEN Centrix OFFS Offshore (grouted HV output line) (c) SebaKMT, all rights reserved Products VLF CR technology – Test van solutions I VLF CR54PZCEN1 (890002585) VLF CR54PZCEN3 (890003040) VLF CR54PZCLASSIC (893016159) VLF CR54PZR30 (892473488) 5,0 181。F 54 kV 8,0 181。F 36 kV 21,0 181。F 18 kV VLF CR80B (890012125) VLF CR80BPZCEN (890012123) 2,0 181。F 80 kV (45 kV) 3,0 181。F 60 kV (36 kV) 4,5 181。F 40 kV 4,8 181。F 36 kV 9,9 181。F 20 kV (c) SebaKMT, all rights reserved Products VLF CR technology – Test van solutions II VLF CR60HP (890022222) 6,5 181。F 60 kV 10,3 181。F 38 kV VLF CR6025181。F (890025800) VLF CR6025181。F trailer (110000000) 25,0 181。F 60 kV HP: High Power (6,5 181。F symmetrical) 25181。F: Con Ed version (symmetrical) VLF CR80P (890012124) VLF CR80PPZCEN (890012122) 2,5 181。F 80 kV 4,5 181。F 60 kV 7,0 181。F 40 kV 7,7 181。F 36 kV 14 181。F 20 kV 67 Product Overview VLF Sinus technology VLF Sinus 34 kV: ? Test voltage: 34 kV ? Test capacity 0,1Hz: 0,6 181。F ? Test capacity 0,01Hz: 3,5 181。F ? Test frequency: ( – ) (automatic frequency adaption) NOTE: The VLF Sinus 34 has been designed for the IEEE market for maintenance testing cables up to 25 kV. 68 ? 0,7 181。F Hz, 30 kVpeak (20 kVRMS) ? 5,0181。F Hz, 30 kVpeak (20 kVRMS) ? Loaddetection R and C ? Breakdown recognition ? Manual and automatic frequencyadaption ? FOhm ? Test modes: Sinus, DC+, DC, rectangular wave, pulsed DC voltage for sheathfault locating. ? Protocolling and update via USB ? Protection class IP20 / IP67 ? Robust casing = PELICase 1440 with integrated trolley ? Option: tanDelta test attachment VLFSin series Technical details 30 (34) kV 69 VLFSin series Technical details 54kV ?Test voltage: 54 kV ?Test capacity 0,1Hz: 1 181。F ?Test capacity 0,01Hz: 5,0181。F ?Test frequency: ( – ) (automatic frequency adaption) First test vans has successfully been delivered to EDF France, integrated in Centrix 1 and 3phase. Vertriebstagung Baunach 2023, (c) SebaKMT 2023, all rights reserved. VLF Tan Delta System description / theoretical explanations SebaKMT 2023 VLF Tan Delta Tan Delta basics ? All MV and HV power cables have a high voltage life expectancy。 ? During the whole service life they are subjected to thermal, electrical, mechanical and environmental stresses。 ? These stresses will change the morphological properties of the insulation, so will age/ degrade the insulation material。 ? Result is a decrease of the breakdownstrength of the insulation。 ? Decrease of the insulation breakdownstrength will in the end lead to cable failures。 ? To avoid failures in the insulation the measurement of the dielectric losses could be a helpful tool. RCIICR ?? 1tan ??VLF Tan Delta Tan Delta basics U IC IR I δ Dielectric losses are mainly dominated by the conductive losses that occur in the insulation material, in case of papermass cables also the polarizationlosses will influence the dielectric losses. The Dielectric losses (Tan Delta) can be calculated according to : Visually given by: In simple terms, the insulation resistance is inversely proportional with the Tan Delta. (c) SebaKMT 2023, all rights reserved. VLF Tan Delta Tan Delta basics The most important ageing phenomenon for PILC cables is the degradation of cellulose, what basically means that moisture es free from the paper insulation because of thermal and chemical processes. This moisture content will decrease the insulation resistance, resulting in an increase in Tan Delta. It is clear that with PILC cables external water ingress will also influen