SALIENT FEATURES

• Facilitates differential protection of transformer or using differential relay & characterization of different relay.
• Each of above trainer has built in requisite relay testing kit typically consisting of voltage injector, current injector, elapsed time counter (1 msec resolution), trip relay logic etc.
• The Trainer need a few set of associated relay testing (current / voltage injection etc.) panels (7-8 nos. typically) which are mounted in a light weight sturdy aluminum profile flat demo panel system. Do not need any separate testing kit.
• Facilitates easy and safe wiring by students due to use of 4mm sturdy Shrouded banana patch cords and shrouded socket arrange-ments for high voltage circuits
• Each panel has ABS molded plastic sturdy enclosure, and colorful screw less overlays showing circuits diagrams & its connection tag numbers for easy understanding and connection
• Useful for Post Graduate projects and research purpose.
• Set of Instructor Guide & Student Workbook

Technical Specifications

• Input 3 phase DOL Starter panel (EMT1)
  • 4 pole MCB of 415 V/2A.
  • DOL 9A Contactor with 230V / 50 Hz / 11VA Coil .
  • Bimetallic thermal O/L relay with range 1.4A - 2.3A
  • R-Y-B Input Indicators.
  • Green SBS5 socket is provided for extend earth.
• 1 phase AC Input supply panel (EMT16A)
  • 1ph. MCBs of 4A/1.6A - 2nos.
  • Bulb Load.
• Variable voltage & current injector panel (EMT23A) x 2 Nos.
  • Consist of 1 phase dimmer 230VAC/1A
  • Short circuit transformer with primary 230VAC/1A,secondary 0-2-8V/12A taps
• 3 Phase Bidirectional Power cum Energy meter panel (EMT34) x 2 Nos.
  • Bidirectional Multifunction
  • 3 phase 3/4 wire, 415VAC, CT Input 5A
  • LCD/LED display, Aux. supply 230V, 45-65Hz,5W
  • V,I, Hz, Pf, KVA, KW, KWH
  • Modbus RTU RS 485 (optional)
  • Green SBS5 socket is provided for extend earth.
• Overcurrent & elapsed time measurement panel (EMT 39) x 2 Nos.
  • Consists of AC ammeter of 20A
  • Elapsed time counter range 999.001 sec, resolution 1msec.
• Differential Relay Panel (EMT44/47)
  • All connection of relay are brough out on this panel
  • 2 NO Trip contacts
  • Aux. Supply 110VDC/230VAC
• CT panel (EMT48)
  • Consist of 5/5 Amp. CT 6 Nos.
  • Primary side of CTs are brought on 3 x 2 x 2 SBS-5 sockets.
  • Secondary side of CTs are Star connectd in group of 3 & brought out on 4 x 2 SBS-5 sockets.
• 415/230VAC, 1KVA, Star/Delta Transformer Panel (EMT49)
  • This is table top panel consisting of 415/230VAC, 1KVA, Star/Delta transformer Panel
  • All the connections of transformer primary & secondary are brought on SBS5 on the top of panel.
• Resistor Load (EMT14B) (Table Top panel)
  • AC/DC Resistors 750E/600E/300E/212E/162E/ 125E/ 112E/100E/400W /8 taps + OFF + separate 60E tap for DC series Gen.
• Resistive Load panel (EMT 42A/14B) (Table Top panel)
  • 3 nos of 600W resistors with switch selectable 7 nos of taps at 100, 112, 125, 150, 175, 200 & 225 Ohm
• Protection relay type (EM/Static /Num) :
  • Electromechanical / Numerial type High speed biased differential relay, current rating 1A, with biased setting of 15%, 30% and 45% by plugboard taps, Aux. supply 110VDC

List of Experiments :

1. To plot characteristics of % biased differential relay(Merz price Method)
2. Pick up test for differential relay.
3. Transformer protection for in zone trips faults.
4. Transformer out zone or non trip faults.

Accessories :
3 Phase variac 3Amp [Optional]

Mechanical Dimension (mm) / Weight of Trainer :

• 1165(L) x 300 (W) x 990 (H)
• Net Wt. : 20 Kg. Gross Wt. : 31 kg.
• Load Panel : Net Wt. : 20 Kg. Gross Wt. : 41 kg.