LV MAIN SWITCHBOARD ELECTRONIC IDMT Main Switchboard Demonstrator

TECHNICAL SPECIFICATION :

1. Input Rating : 3 Phase, 400V AC, 50 Hz

1 no. Air Circuit Breaker 1000 Amp, 45kA, TPN, draw out type, manual spring charge, c/w Mechanical and Electrical Interlock.

2.  Output :

2 x 32 A TPN Switch Fuse

2 x 32 A TPN MCCB

2 x 63 A Fuse Switch

 

1 x Distribution board c/w

4 x 6 A MCB

2 x 20 A MCB

2 x 32 A MCB

1 x 40 A Main Switch SPN

1 x 40 A RCCB DP (100 mA)

Spare Compartment

 

3. Instrument :

Digital power meter (2 unit)

Detection method : True RMS

Display : LCD

Detect frequency (Hz) : 45 – 65

Input Current Range : 5mA – 10A

Input Voltage Range : 0 – 300V AC

Mounting : Panel / DIN Rail

Communication : Modbus RTU/Modbus TCP/IP/Built-in Webserver

 

Analog (2 unit)

1 x Ammeter c/w selector switch 0 – 500 A

1 x Voltmeter c/w selector switch 0 – 500 V

1 x Power Factor Meter

1 set x Indicating Lights

1 x kWh meter 3 phase (digital type)

1 x 20 A MCCB – for 1 x 5 kVAR Capacitor Bank

 

4. Protective Device

1 x Earth Fault Relay

1 set x Protective Device IDMT O/C (Electronic Type)

5. Capacitor Bank

1 x Power Factor Regulator minimum 5 step c/w built in Current Transformer)

1 x 200 A MCCB – for Capacitor Bank busbar

2 x 30 A MCCB – for 2 x 10 kVAR Capacitor Bank

2 x 45 A MCCB – for 2 x 15 kVAR Capacitor Bank

1.6 Safety  Equipment

a. 1 No. of Rubber Mate 1000V

    (Standard size -  for MSB)

b. 1 No. of Safety Helmet.

c. 1 Pair of Leather Glove 1000V

d. Caution notice (1 No. of "AWAS",  3 No. of "DANGER",  3 No. of "BAHAYA",  3 No. "WORK  IN PROGRESS")  refer to Electrical Regulation  1994 (Regulation  38)

e. Labelling -  All Part Instrument Panel I      equipment  such as Breaker, Metering,       Protection Devices, outgoing,  Capacitor Bank and others.

f.  Both feeder must be connected  to four hour artificial loading  unit to show the increasing  I decreasing the current only.

g. CPR chart refer to Electrical Regulation  1994 (Regulation  39) and CO2 fire extinguisher  refer to Regulation 40

h. Protection equipment will be calibrate at the site (SAT)

i. 2 no. of Three-pole Earthing and Short Circuiting Devices:

· Clamping range 55mm

· Cable cross-section 25/25 mm2

· Max. short-circuit current lk 0.5s 7.0kA

· Max. short-circuit current lk 1s 4.9kA

· Standard EN/IEC 61230 (DIN VDE 0683 Part 100)

· Temperature range –25°C + 55°C

· Material (clamp body) MCI/gal Zn

· Material  (pressure plates) copper alloy

· Material (short circuiting cables) highly flexible copper

 

1.7  General  Specification

a. Construction

   The LV MSB is modular,  contained, suitable for both front back access. The Switchboard  Construction  is Fabricated

b. Paint Work

    The Heavy Sheet Steel is treated  with the trust in habiting  primer, following by coatings of          top quality  epoxy powder paint and oven  bake to 200C to obtain good adhesive.

c. Technical  Data The LV MSB is suitable  for 400V, 3 phase, 4 wire and 50 Hz system.  It is designed to with stand  a fault level of 31 MVA.

d.  Busbars are of hard drawn  high conductivity  copper  with current density of 400A  per sq. In color coating identification  for the bus bar are as below:

i.  Red - for red phase

ii. Yellow -  for yellow  phase iii. Blue - for blue phase

iv. Black -  for neutral

 

e. Supply with 2 termination   box c/w 5 x 400 Amp copper terminal  (R, Y, B, N, & E) and 4 x 35mms amour cable.

 

CONSTRUCTION

· Marking: Engraved or silk-screened legends

· Storage: 1 compartments for storing miscellaneous item like hand tools, etc.

· Console: Heavy Sheet Steel

· Finish: Baked epoxy powder in matching grey duty  castors

· Mounting : 6 Unit Heavy Duty Castors Wheel