Ring and Radial Distribution Trainer (XPO-PRT/RRD)

Salient Features

Scaled down lab setup for comparative study of ring vs radial distribution networks in urban & rural milieu.
Facilitates experiments on ring & radial distribution networks & load shedding using relay discrimination for graded
protection.
4 numbers of OCR, 5 numbers of measurement meters, 5 numbers of transmission lines provided.
Easy and safe wiring by students due to 4mm sturdy Shrouded banana patch cords to handle AC high voltage circuits.
Aluminum profile Sturdy (5×4) Modular Flat Panel system, carrying various components housed in plastic enclosures
(panels) with colorful screwless overlays showing circuit schematic & its connection tag numbers for easy understanding
and connection.
Set of Instructor Guide & Student Workbook.

Technical Specifications

Input 3 phase DOL Starter panel (EMT1)
[11 Shrouded Banana]

4 pole MCB of 415 V/10A.
DOL 16A Contactor with 230V / 50 Hz / 11VA COIL
Bimetallic thermal O/L relay with range 3 – 5A

3 phase bidirectional power cum energy meter panel(EMT34)- 5 Nos.

[8 Shrouded Banana]

Bidirectional multifunction meter
3 phase 3/4 wire, 415VAC, CT input 5A
LED/LCD display, Aux. supply 230V, 45-65Hz, 5W
Measure V,I,Hz,Pf,KVA,KW,KWH
Green shrouded socket provided to extend earth.

Lamp Load Panel (EMT 7) – 2 Nos.
[12 Shrouded Banana]

230V/100W X 3 bulbs with individual ON/OFF using 6A toggle.

OCR with trip isolator panel (EMT50J) – 4nos.
. [13 Shrouded Banana]

Consisting of:
– Numerical IDMT/DMT over current relay of 5A rating with front panel current & TMS setting.
– 3 ph contactor as trip isolator.
– 3 numbers of CTs (5A/5A) mounted inside.
– P-ON LED indicator, Start/Stop push buttons, Relay bypass toggle switch.

Resistive Load Panel (EMT42A) – 2 Nos.
[18 Shrouded Banana]

Table top panel consisting of 3 nos of 1KW resistors with switch selectable 7 nos. of taps at 100, 112, 125, 150, 175, 200 & 225 ohm & SIL tap of 262 ohm.

Transmission line panel TL2 (EMT38/A/B/C) – 1 no.
[60 Shrouded Banana]
Table top panel consisting of:

3 Mw scaled down by (1000:1) TLS, 5A max. rated.
Consisting of 5 numbers of transmission lines of different lengths.
0.3pu Transmission lines of 125km each 2 nos.
0.2pu Transmission lines of 75km each 2 nos.
0.13pu Transmission line of 50Km each 1 no.

Fault resistance panel (EMT42I) – 1 No.
[4 Shrouded Banana]

Table top panel consisting of 1 no of 1KW resistors with switch selectable 1(off) + 8 nos. of taps at 50, 65, 100, 125, 150, 175, 200 & 250 ohm.

List of Experiments

Study of Ring distribution & graded protection using OCR
relays.
Study of Radial distribution & graded protection using OCR
relays.
Study of Relay Discrimination using OCR relays.

Mechanical Dimension

Mechanical Dimension (mm) of trainer

Rack: 1165(L) X 300 (W) X 990 (H)
Net Wt. : 50 Kg Gross Wt.: 60 Kg.
TL2: 600(L) x 385(W) x 500(H) / Net Wt- 103Kg.
Resistive Load panel: 600(L) x 275(W) x 500(H) /
Net Wt- 50Kg.

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