EV SET OF PROTECTION RELAYS Mod. SRT-1/EV

Features

This system has been designed to enable students to connect and apply a wide range of electric, electronic protection relays with circuits of increasing complexity, besides verifying their characteristics. The training program is developed on interchangeable modules that enable to assemble the circuits with the mere connection of the modules via flexible leads of the equipment. The modules are wholly made of insulating material, the graphic representation with international electric symbols and the educational safety terminals enable to assemble and test electric circuits in short time.

Main subjects dealt with:

  • Study of the operational characteristics of protection relays.
  • Typical applications of protection relays.
  • Identification number of the protection function.
  • Combination of more relays to attain specific protection goals.
Product Details

TECHNICAL CHARACTERISTICS:

Set of modules for studying static protection relays and measuring transformers:

  • 1 Module SR-1
  • 1 three-phase maximum-current and short-circuit relay, adjustment range 0,5-2A/1-16 A ac, auxiliary power supply of 230 V 50-60 Hz.


  • 1 Module SR-2
  • 1 single-phase maximum or minimum current relay, adjustment range 0.1-5A/ 5-25 A ac/dc, auxiliary power supply of 230 V 50-60 Hz.


  • 1 Module SR-3
  • 1 three-phase maximum and minimum voltage relay /N, adjustment range +10% / -15%, Ue 380-400 Vac, self-powered.


  • 1 Module SR-4
  • 1 single-phase maximum or minimum voltage relay, adjustment range 2-500 Vac/dc, auxiliary power supply of 230 V 50-60 Hz.


  • 1 Module SR-5
  • 1 maximum and minimum frequency relay, 50-60 Hz, adjustment range + 10%, self-powered at 230 Vac.


  • 1 Module SR-6
  • 1 phase sequence and voltage asymmetry relay for networks of 400 V, asymmetry adjustment range: 5 -15%, self-powered at 400 Vac.
  • 1 Modulo SR-7
  • 1 auxiliary relay with two exchange contacts, driven by TTL/PLC signals / buttons of 24 Vdc for excitation, stop, start.


  • 1 Module SR-8
  • 1 auxiliary relay with two exchange contacts, excitation 24 Vdc, 1 optical acoustic indicator of 24 Vac/dc.


  • 1 Module SR-9
  • 1 timer relay with one exchange contact, multi-function, multirange, multi-voltage, 24 Vac/dc


  • 1 Module SR-10
  • directional overcurrent relay, 5 A - 400 V, auxiliary power supply of 230 Vac.


  • 1 Module SR-11
  • 3 wound-primary current transformers 10/5 A, performance 3VA in cl. 0.5.


  • 1 Module SR-12
  • voltage transformers 500/100 V, performance 10 VA in cl. 0.5.


  • 1 Module SR-13
  • 1 current step-up transformer 5 + 5 + 5/5 A, performance 8 VA in cl. 0.5.


Accessories supplied:

  • 1 box for modules of aluminiun section and varnished sheet steel with transversal feet to lay on benches mod. TSI-2/EV
  • 1 variable single/three-phase power supply of 0-430 Vac / 0-500 Vdc 5A for tests on voltage and current relays mod. AMT-3/EV
  • 1 digital power analyzer suitable to balanced or unbalanced systems with or without neutral. Suitable to measure voltages, currents, apparent, active and reactive powers, maximum active, reactive and apparent power peaks, counting of active and reactive power, co-generation meters. The analyzer is provided with two programmable relays with minimum or maximum alarm functions between the measured parameters mod. AZ-VIP.
  • 2 digital auto range multimeters
  • 1 desk-type three-phase rheostat 3 x 500 W, 3 x 50, for tests on current relays.
  • Set of 40 cables with safety terminals ø 4 mm
  • Frame - mod. TSI-2/EV - dimensions: 1160 x 500 x 810 mm
  • Net weight: 26 kg
More Information

TRAINING PROGRAM:

  • Connections and study of the behaviour of a maximum current relay in a three-phase network with different current values, verification of trip time.
  • Connections and study of the behaviour of a short-circuit current relay in a three-phase network with different current values, verification of trip time.
  • Connections and study of the behaviour of a single-phase maximum or minimum current relay, verification of trip time for maximum and minimum current.
  • Connections and study of the behaviour of a maximum or minimum DC relay, verification of trip time for maximum and minimum current.
  • Connections and study of the behaviour of a maximum and minimum voltage relay in a three-phase network with neutral, verification of trip time for maximum and minimum voltage.
  • Connections and study of the behaviour of a single-phase maximum or minimum voltage relay, verification of trip time for maximum and minimum voltage.
  • Connections and study of the behaviour of a maximum and minimum DC voltage relay, verification of trip time for maximum and minimum voltage.
  • Connections and study of the behaviour of a maximum and minimum frequency relay, verification of its operation at maximum and minimum voltage.
  • Connections and study of the behaviour of a phase sequence and voltage asymmetry relay in a three-phase network, verification of its operation with wrong sequence and in non-asymmetric conditions or missing phase.
  • Connections and study of the behaviour of a maximum current directional relay in a three-phase network, verification of its operation with reverse current flow and as directional of maximum earth current (suitable for lines and generators).
  • Use of auxiliary relays as interface of protection relays for controlling high power flows
  • Use of auxiliary relays as interface for remote, optical/acoustic signalling of intervention of protection relays.
  • Use of timers with various time functions to increase the functionality of protection relays
  • Determination of the transformation ratio of a TA with various primary currents and influence of load on the secondary winding, performance tests.
  • Connection of current transformers in three-phase networks.
  • Measurement of zero sequence current in a three-phase system.
  • Tests on a current step-up transformer.
  • Demonstration of the differential protection principle.
  • Determination of the transformation ratio of a TV with various primary voltages and influence of load on the secondary winding, performance tests.
  • Connections of voltage transformers in three-phase networks.
  • Connections of open-delta voltage transformers in three phase networks.