winding copper weight and gross weight induction motor, submersible motor

 

Winding and weight of induction and submersible motor –

winding weight and motor weight

Typical motor, 3 Ph, 40 H, 415v

Sr.	KW	HP	Copper winding weight(kg)	Total weight	Remarks
Submersible motor pump set
1	1.5	2	1.2	15
2	2.2	3	1.8	25
3	26	35	21	95
4	30	40	24	111
5	37	50	30	120
Induction motor
1	5.5	7.5	4.5	72
2	7.5	10	6	80
3	11	15	9	121
4	15	20	12	138
5	22	30	18	200
6	30	40	24	266
7	37	50	30	333
8	55	75	45	492
9	75	100	60	620

 

 

 

 

Nominal sped of submersible motor

3" motor                                              N = 2800 rpm

4" motor                                              N =2900 rpm

6" motor                                              N=2900 rpm

8" & 10" motor                                  N=2900 rpm

 

Note:

1)      Weights are approximate.

2)      Copper weight is @ 600gm per HP (+/-) 10%.

3)      Copper weight varies acceding to RPM , selected for 1440 RPM in case of induction motor

4)      Gross weight of motor  increases with decrease of RPM

The above data is for academic purpose only. Readers are requested to verify with manufacturer.

ELECTRICAL CONSULTANCY CHARGE

Electrical Consultancy charge depends on the various factors but depending on City to city. We can say in general- 

1) 1.5-2% - of project cost

a)      Includes- detail drawing, specification, costing, maximum visit -2 nos.

b)      Excludes - site visit for inspection and execution support.

c)      Distance  upto 30 km from the consultant office

2) 2-3 % of project cost

a)      Includes- detail drawing, specification, costing

b)      Includes – 8 visits either for inspection or execution support,

a)      distance  upto 30 km from the consultant office

3) Visit charges-

b)      Approx- 5000/- per visit,

c)      Distance upto 30 km from the consultant office for inspection or execution support.

4) Mutually agreement

a)      between  consultant and  client

5) Assistant charge:

a)      It may be included in case 1, 2. For case 3, Rs 2500/- per visit,

b)      Distance upto 30 km from the consultant office.

 Note: in reality the consultancy fee is not actually dependent on the type of work. It depends on your status. you can charge as per your knowledge and popularity. State or central govt. has some own rules but it is difficult to estimate.

GENERAL ROLE OF ELECTRICAL CONSULTANT

ENGINEERING SERVICES:

a)      Data accumulation for electrical & allied systems through meetings with client and other consultants

b)      Load calculations and assessment of actual demand, possible maximum demands, dimension, rating of transformer, substation requirements, D.G. set requirements.

c)      Liaison work with Statutory Agencies.

d)      Detail engineering of the power system like distribution cables, Panels & Distribution boards, cable sizing, power outlets, and power wiring.

e)      Layouts for the power distribution system.

f)       Single line diagrams.

g)      Lighting scheme design for internal and external lighting, lighting layouts with SLDs.

h)      Selection of fixtures and detailing of mounting

i)        Detail engineering & layout drawings for lightening protection & earthing systems

j)        Detailing and drawings for communication, fire detection and alarm systems, Security systems if any

k)      Preparation of Technical specification for equipment and works.

l)        Preparation of bill of quantities and estimates based on BOQ and Specs

m)   Floating Inquiries / Tenders consisting of;

a.      General terms of contract

b.      Technical specifications

c.       Schedule of quantities

d.      Drawings

n)      Technical and commercial comparison of quotes for above recommendation, negotiations, order drafts etc.

o)       Preparation of work schedule and programs based on available information and inputs from clients.

Typical project

1. Industrial Projects
2. Multi Storied building
3. Multiplexes
4. Commercial Complexes
5. Residential Colonies
6. Hotels & Resorts
7. Hospitals
8. Hostel
9. Dharamshala
10. Sports Stadiums
11. Shopping Centers
12. Institutional Buildings
13. Temples
14. Street lighting
15. Road lighting
16. Township Projects etc.

 

cable size for DG set

Cable size for DG set

TYpe:	copper
Rating (kva)	phase	current	size per phase	neutral
1 phase
5	1	21.7	1core. X 6 sqm	1core. X 6 sqm
7.5	1	32.6	1core. X 6 sqm	1core. X 6 sqm
10	1	43.5	1core X16 sqm	1core X16 sqm
15	1	65.2	1 core  X 25 sqm	1 core  X 25 sqm
20	1	87	2 core X 16 sqm	2 core X 16 sqm
25	1	108.5	2 core X 16 sqm	2 core X 16 sqm
30	1	130	2 core  X 25 sqm	2 core  X 25 sqm
35	1	125	2 core  X 35 sqm	2 core  X 35 sqm
40	1	174	2 core  X 35 sqm	2 core  X 35 sqm

For 3 phase

KVA	15	20/30	35	45/50	62.5/70	82.5	100	125
Amp	20.9	27.5/41.5	48.5	62.5/55.5	86/97.38	114.6	139	173.7
Al cable size 3.5 core sqmm	16	25	35	70	95	95	150	150
Copper  cable size 3.5  core sqmm	6	10	16	25	35	50	50	70

KVA	140	160	180/200	250	320	400	500	600
Amp	194.5	222.5	250.4/278.1	347.6	445.2	556.4	695.6	834.7
Al cable size 3.5 core sqmm	185	240	300	2RX 185	2RX 240	2RX 300	4RX 240	4RX 300
Copper  cable size 3.5  core sqmm	70	95	120	150	240	300	2RX 185	400