Current Transformer Fundaments Application for Protections Devices

The Current Transformer Fundaments Application for Protections Devices, to demonstrate the students which the main functions of current transformers are and which the parameters that must be considered in order to choose the adequate current transformer are.

ATENG 11596 — Current Transformer Fundaments Application for Protections Devices

• N-TRTC. Three-Phase Current Transformer.
• Input current: 2,5 A.
• Output current: 1 A.
• Nominal Power: 1 VA.
• N-TRBC. Three-Phase Balancing transformer.
• Input current: 1 A.
  N-TRTC
• Output current: 1A.
• Nominal Power: 5 VA.
• N-REV/CT. Variable Resistor for Current Transformer.
• Rheostat: 0.10 ohm (smoothly variable).
• Nominal Power: 4 W.
• Inputs/Outputs: 4mm safety sockets.
  N-TRBC
• N-VPS01. AC 3PH Variable Power Supply.
  ON-OFF removable key.
• Input Voltage: 400 VAC, 3PH+N.
• Output Voltage:
• 0…450 VAC.
• 0…240 VDC.
• Frequency: 50/60 Hz.
  Wheel to regulate the voltage. N-REV/CT
  Three lamps.
• Measurement commutators:
• One commutator to measure the voltage:
• 6 positions: L1-N ; L2-N ; L3-N ; L1-L2 ; L1-L3 ; L2-L3.
• One commutator to measure the current:
• 3 positions: L1, L2, L3.
• Three-Phase supply hose with IP44 3PN+E 32A 400V connecting plug.
• Differential magnetothermal, 4 poles, 25A, 30mA AC 6KA. N-VPS01
• N-EALD. Network Analyzer Module with Oscilloscope and Data Acquisition (2 units).
  The network analyzer module allows fulfilling measurements, displaying and analyzing all the
  parameters of the AC electrical networks. It has an LCD screen and push-buttons for the navigation
  through the different menus. It includes specific software for monitoring current and voltage curves,
  harmonics display, tariffs programming, alarms programming and electrical parameters storage.
• Features:
• Multifunctional three-phase power meter:
• Single and three-phase voltage. Up to 690 VAC L-L.
  N-EALD
• Phase and line current. Current range up to 200%. Measurement from 0-10 A.
  Active, reactive and apparent power.
• Suitable frequencies: 25 Hz, 50 Hz, 60 Hz y 400 Hz.
  Display of the V-I vector diagram.
• Supply voltage: 85-265 VAC.
• Energy quality control:
  Current and voltage individual harmonics measurement. Up to the 40th harmonic.
  THD voltage and current, TDD and K-factor.
  Maximums and minimums display.
  Waveforms display, 128 samples/sec.
  Events and data storage.
• Harmonics analyzer:
  THD voltage and current, TDD current and K-factor, up to the 40th harmonic.
  Current and voltage harmonic spectrum and angles.
• Tariff programming:
  Class 0.5S IEC 62053-22, active and reactive power in four quadrants.
  Measurement of the total and per phase three-phase active, reactive and apparent powers.
  Usage time, 4 energy/demand records of total tariffs.
  8 tariffs, 4 seasons, 4 types of days.
  Automatic daily report of energy consumption maximums and minimums.
• Communications:
  Modbus TCP communication protocol with Ethernet interface.
  3

Specifications

• MED65. Digital Multimeter.
  This module has a digital multimeter of about 3 ½ digits, with double-jack ending cables of about 4
  mm to facilitate interconnections.
• With this digital multimeter we will be able to measure:
  Voltage. MED65
  Current.
  Resistance.
  Capacitors capacity.
  Temperature.
• N-REVT/1K. 1kW Three-Phase Variable Resistors Module.
  Parallel, series, star and delta connection.
• Resistance: 3 x 750 Ohm.
• Current: 3 x 2 A.
  N-REVT/1K
• N-REL09. Time Electronic Relay against Overcurrents Module (1.2 - 7 A).
  Electronic thermal relay.
  Overload protection.
• Range 1.2 - 7 A.
  Reset and test function.
  1 NONC contact. N-REL09
  Temporization.
• All necessary cables to realize the practical exercises are included.
  Cables and accessories, for normal operation.