PTMV 1 1072020 Sensor presentation PTMV 2 Product

© PTMV - 1 10/7/2020 Sensor presentation

© PTMV - 2 - Product Scope n A Sensor is a device intended to transmit a signal corresponding to the primary current or voltage to the secondary equipment. n Power. IT Sensors are typically used in MV switchgears and outdoor switches for measuring, protection and indication.

Sensors vs. Instrument Transformers Trends in electrical engineering. . . but not in transformers! Size Performance © PTMV - 3 - Standardisation

Sensors vs. Instrument Transformers Reason: The properties of material used Saturation Unlinear range Linear range Unlinear range © PTMV - 4 - Remedy: Absence of iron

© PTMV - 5 - Rogowski coil n First published in 1912 by Rogowski and Steinhous n Passive element n Uniformly wound coil with non-magnetic core n Output signal is proportional to the derivate of primary current n IEC 60044 -8

© PTMV - 6 - Requirements for a Current Sensor n IEC-requirements n Cost effective n Low LCA n Size

Sensors vs. Instrument Transformers Rated primary current (CT) Ip (log) © PTMV - 7 - Ipr=80 A

Sensors vs. Instrument Transformers Rated primary current range (sensor) © PTMV - 8 - Ip (log) Ipr = 40 A. . . . 80 A. . . . 160 A

Sensors vs. Instrument Transformers Accuracy limit factor (Kalf) c Protection class 10 P CS Ip (log) © PTMV - 9 - CT Ipr

Voltage Divider Resistive divider n Matched resistor pair n n 1: 10 000 divider ratio Accuracy up to class 0. 2 Capacitive divider n Zc = 1/ C © PTMV - 10 - n 1: 10 000 divider ratio n Accuracy up to class 3 n Small size ideal for bushings IEC 60044 -7

© PTMV - 11 - Requirements of a Voltage Sensor n IEC-requirements n Cost effective n Safe n Low LCA n Size

Sensors vs. Instrument Transformers Linearity © PTMV - 12 - Typical error, sensor

Sensors vs. Instrument Transformers © PTMV - 13 - Transmitted signal level Voltage transformer (ku=1, 9) Voltage sensor 1, 2 - 110 V, 25 VA 12 - 1100 m. V, At free potential, must be earthed Secondary losses = I 2 R Always earthed in the sensor Secondary losses negligible Current transformer (Kalf =20) Current sensor 0, 25 - 100 A, 5 VA 7, 5 - 3000 m. V, At free potential, must be earthed Secondary losses = I 2 R At free potential Secondary losses negligible 80 m. VA 6 m. VA

Sensors vs. Instrument Transformers Short-circuited secondary (VT) Voltage transformer Isc Voltage sensor 250 M 25 k Isc/Acu = 160 A/mm 2 Temp. 500 C © PTMV - 14 - Explosion within 30 s Isc = Inormal Isc

Sensors vs. Instrument Transformers Open secondary (CT) Current transformer Current sensor Isc Uopen 0 - 10 k. V © PTMV - 15 - Isc/Acu = 40 m. A/mm 2

Sensors vs. Instrument Transformers Frequency response rel © PTMV - 16 - 10 VS (Cap. ) 100 CT 1000 10 000 VT VS (Res. ) F/Hz CS

Sensors vs. Instrument Transformers Secondary wiring Instr. transf. Terminal blocks Relay Wiring and screw connections Testing of connections © PTMV - 17 - Sensor IED Integrated cable and connector

Sensors Secondary wiring II, Shielding Sensor © PTMV - 18 - S 1 S 2 IED

Sensors vs. Instrument Transformers Compactness Current transformers Combisensor Voltage transformer Size of active parts © PTMV - 19 - Number of cores

© PTMV - 20 - Sensor Technology - CT/VT vs. Sensors

Standards for Sensors from ABB are designed, manufactured and tested according to international standards when applicable. n n © PTMV - 21 - n Voltage sensors: IEC 60044 -7 (1999 -12) n Instrument transformers – n Part 7: Electronic voltage transformers Current sensors: IEC 60044 -8 (2002 -07) n Instrument transformers – n Part 8: Electrical current transducers Combisensors: IEC 60044 -3 (1980 -01) n Instrument transformers – n Part 3: Combined transformers

Combi Sensor, type KEVCD_ n Current and voltage sensors in the same block n Measurement and protection by one sensor n Dimensions and primary connections same as DIN-type CTs (DIN 42600) n 12, 17. 5, 24 k. V, two types: © PTMV - 22 - n n A. </= 1250 A n B. > 1250 A (max. 3200 A) Including coupling electrode for voltage indication

© PTMV - 23 - Selection Guide for KEVCD Sensors

© PTMV - 24 - Sensor Concept

Sensors in use around the world © PTMV - 25 - In use in 56 countries More than 20 000 sensors in operation

© PTMV - 26 - Sensors in use around the world

Sensors Safety Short delivery time © PTMV - 27 - Smart integration