PANDUAN PEPASANGAN ELEKTRIK 2

Arus Permulaan Motor

(Motor Starting Current)

Tambah kapsyen

Bekalan	Saiz Motor	Arus Permulaan Maksima
1 Phase	< 1 HP	6 X Motor Full Load Current
1 Phase	1 HP to 10 HP	3 X Motor Full Load Current
3 Phase	10 HP	2 X Motor Full Load Current
3 Phase	10 HP to 15 HP	2 X Motor Full Load Current
3 Phase	> 15 HP	1.5 X Motor Full Load Current

Penghidup Motor

(Motor Starter)

Starter	HP or KW	Starting Current	Torque
DOL	<13 HP(11KW)	7 X Full Load Current	Good
Star-Delta	13 HP to 48 HP	3 X Full Load Current	Poor
Auto TC	> 48 HP (37 KW)	4 X Full Load Current	Good/ Average
VSD		0.5 to 1.5 X Full Load Current	Excellent
Motor > 2.2KW Should not connect direct to supply voltage if it is in Delta winding

 

Peratus Impedan Transformer

Impedance of Transformer (As per IS 2026)

MVA	% Impedance
< 1 MVA	5%
1 MVA to 2.5 MVA	6%
2.5 MVA to 5 MVA	7%
5 MVA to 7 MVA	8%
7 MVA to 12 MVA	9%
12 MVA to 30 MVA	10%
> 30 MVA	12.5%

Saiz Standard Transformer

(Standard Size Transformer)

Standard Size of Transformer	KVA
Power Transformer (Urban)	3,6,8,10,16
Power Transformer (Rural)	1,1.6,3.15,5
Distribution Transformer	25,50,63,100,250,315,400,500,630

Kapasiti Sub Stesen dan Arus Litar Pintas

(Sub Station Capacity & Short Circuit Current Capacity)

As per GERC
Voltage	Sub Station Capacity	Short Circuit Current
400 KV	Up to 1000 MVA	40 KA  (1 to 3 Sec)
220 KV	Up to 320 MVA	40 KA  (1 to 3 Sec)
132 KV	Up to 150 MVA	32 KA  (1 to 3 Sec)
66 KV	Up to 80 MVA	25 KA  (1 to 3 Sec)
33 KV	1.5 MVA to 5 MVA	35 KA (Urban) (1 to 3 Sec)
11 KV	150 KVA to 1.5 MVA	25 KA (Rural) (1 to 3 Sec)
415 V	6  KVA to 150 KVA	10 KA  (1 to 3 Sec)
220 V	Up to 6 KVA	6 KA  (1 to 3 Sec)

Kapasiti Sub Stesen dan Arus Litar Pintas

(Sub Station Capacity & Short Circuit Current Capacity)

As per Central Electricity Authority
Voltage	Sub Station Capacity	Short Circuit Current
765 KV	4500 MVA	31.5 KA for 1 Sec
400 KV	1500 MVA	31.5 KA for 1 Sec
220 KV	500 MVA	40 KA for 1 Sec
110/132 KV	150 MVA	40 KA or 50 KA for 1 Sec
66 KV	75 MVA	40 KA or 50 KA for 1 Sec

Nilai Minima Bumi dan Masa Kerosakan

(Minimum Ground Clearance and Fault Clearing Time)

Voltage	Min. Ground Clearance	Fault Clear Time
400 KV	8.8 Meter	100 mille second
220 KV	8.0 Meter	120 mille second
132 KV	6.1 Meter	160 mille second
66 KV	5.1 Meter	300 mille second
33 KV	3.7 Meter
11 KV	2.7 Meter

Kadar Arus Bus Bar

(Bus Bar Ampere Rating)

For Phase Bus bar	Aluminium 130 Amp / Sq.cm or 800Amp / Sq.inch.
For Phase Bus bar	Copper 160 Amp / Sq.cm or 1000Amp / Sq.inch
For Neutral Bus bar	Same as Phase Bus bar up to 200 Amp than Size of Neutral Bus bar is at least half of Phase Bus bar.

Jarak Bus bar

(Bus bar Spacing)

Between Phase and Earth	26mm (Min)
Between Phase and Phase	32mm (Min)
Bus bar Support between Two Insulator	250mm.

Tahap Bunyi Generator Diesel

(Sound Level of Diesel Generator)
(ANSI 89.2&NEMA 51.20)

KVA	Max. Sound Level
<9 KVA	40 DB
10 KVA to 50 KVA	45 DB
51 KVA to 150 KVA	50 DB
151 KVA to 300 KVA	55 DB
301 KVA to 500 KVA	60 DB