Sepam - HV/MV Protection and control units (ENG) - Trinet

Testing equipmentMeasurement and testing equipmentrequired according to the type of testThe injection apparatus should transmit a pure sine wave signal (with noharmonics (2) .Measuring instrumentsThe instruments should have accuracy and tolerance characteristics which are atleast equivalent to those of Sepam 2000 (minimum class 1).Current generatorc single-phase and/or three-phase: différential protection test require 2 currentgeneratorsc dynamic range: 0 to 100 A rmsc % harmonics of level (≥ 3) < 7%c synchronous ON/OFF contactsVoltage generatorc single-phase or three-phasec dynamic range: 0 to 220 V rmsc % harmonics of level (≥ 3) < 7%c synchronous ON/OFF contactsFrequency generator (1)c dynamic range: 0 to 100 V rms, sine wavec frequency range: 45 Hz to 65 HzPhase shifter (1)c accuracy of 360°/1°Please note:Some units perform and display voltage phase shift using the current as areference. This is liable to cause angle interpretation errors.Contactor or relay (k)c minimum breaking capacity 10 A ACc coil: supply voltage (according to the auxiliary source available)c used to shunt injection current limitingOhmmeterc 0 to 1 kΩ 0.03%Ammeterc 0 to 10 A rmsClamp-on probec 100 A (measurement for 20 In) identified as P1 and P2, S1 and S2ACE 907 injection interfacec rated current: 1 A (for CSP type current sensor)Voltmeterc 0 to 220 V rms (AC and DC)c 20 Mohms/voltChronometerc 0 to 2h, accuracy 0.1 sc synchronous and manual ON/OFF contacts (for very long time periods)Variable resistorsc 0 to 500 ohms, 0.03%, 1/4 W (simulation of RTDs)(1)these instruments are very often linked to the voltagegenerator and include their own measurement indicators.(2)in order to validate the tests, it is recommended to use anoscilloscope to verify the shape of the injection unit signalsand to use a spectral analyzer to verify the amplitude oflevel 3, 5 and 7 harmonics.Power resistorc 1 ohm ≥ 25W (simulation of undercurrent)Scientific calculator( Log, square root, Cos, Sin)2/2 Sepam 2000 - Testing