Submersible Motor Pump Technical Data

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Loss of Water in The Pipe
(per 100M length [M])

Total Head Calculation Method

H = h + hf
hf = λ – 1/d – v/2g
v = Q/A

· H – Total head (M)
· h – Actual head (position head) (M)
· λ – Coefficient of friction of the pipe
· g – Gravitational acceleration 9.8 (m/s²)
· Q – Pumping quantity(m³/sec)
· v – Flow velocity in pipe(m/sec)
· d – Inner diameter of the tube (M)
· A – Aperture cross-sectional area (m²)

Calculation of Required Power

· Pump water power (KW) = 0.163 x Total head (m) x Water volume
(m³/min) x Liquid specific gravity

· 3-phase rated output (KW)
= √3 x Rated voltage (V) x Rated current (A) x Motor efficiency x Motor power factor / 1000

· Pump shaft power (KW) = Water power / Pump efficiency

· Electric motor required power
= Pump shaft power x (1 + Extra power)
= (Motor extra power is about 10% = 0.1)

Calculation of Discharge Diameter According
to Pumping Quantity

Caliber (mm)	Flux (m³ / min)
32	0.06 ~ 0.12
40	0.10 ~ 0.20
50	0.16 ~ 0.32
80	0.40 ~ 0.80
100	0.63 ~ 1.25
150	1.60 ~ 3.15

How to Start The Submersible Motor Pump
(We Recommend)

· Since the motor in the starting state is the same as the voltage device with the secondary side shorted, a large starting current
(400 ~ 600%) flows when the rated voltage is applied to the primary side, and there is a risk of damage to the original line, so use the following starting method.

· Line Start : 15KW or less

· Star-Delta Start : 18.5KW or more and 75KW or less

· Reactor Start : 90KW or more

· Compensator Start : 90KW or more

Motor Rotation Speed (By Number of Poles)

number of pole	60Hz		50Hz
number of pole	Synchronous speed	Pump speed	Synchronous speed	Pump speed
2	3600	3450	3000	2850
4	1800	1750	1500	1450
6	1200	1165	1000	950
8	900	875	750	720
10	720	700	600	580
12	600	585	500	485
14	514	500	429	410
16	450	435	375	365
18	400	390	333	325
20	360	350	300	290

Basic Unit Comparison Table

1 Mpa	10.1972 kgf/cm²
1 kgf/cm²	0.0980665 Mpa
1 psi	0.070307 kgf/cm²
1 kgf/cm²	14322334 psi
1 kg	2.2046226 lb
1 lb	0.45359237 kg
1 kgf	9.80665 N
1 N	0.1019716 kgf
1 M	3.280840 Ft
1 Ft	0.304850 M
1 m³/min	264.1833 USGL/min
1 USGL/min	0.0037824 m³/min

Resistance Loss of Various Piping Parts
(indicated by the equivalent length of a horizontal straight pipe [M])

Part	Tube Inner Diameter
Part	25	32	40	50	65	80	100	125	150
90˚Elbow	0.90	0.20	1.50	2.10	2.40	3.00	4.20	5.10	6.00
45˚Elbow	0.54	0.72	0.90	1.20	1.50	1.80	2.40	3.00	3.60
90˚T tube	0.27	0.36	0.45	6.00	0.75	0.90	1.20	1.50	1.80
Gate Valve	0.18	0.24	0.30	0.39	0.48	0.63	0.81	0.99	1.20
Globe Valve	7.5	10.5	13.5	16.5	19.5	24.0	37.5	42.0	49.5

90˚Elbow
Tube Inner Diameter
25	32	40
0.90	0.20	1.50
50	65	80
2.10	2.40	3.00
100	125	150
4.20	5.10	6.00
45˚Elbow
Tube Inner Diameter
25	32	40
0.54	0.72	0.90
50	65	80
1.20	1.50	1.80
100	125	150
2.40	3.00	3.60
90˚T tube
Tube Inner Diameter
25	32	40
0.27	0.36	0.45
50	65	80
6.00	0.75	0.90
100	125	150
1.20	1.50	1.80
Gate Valve
Tube Inner Diameter
25	32	40
0.18	0.24	0.30
50	65	80
0.39	0.48	0.63
100	125	150
0.81	0.99	1.20
Globe Valve
Tube Inner Diameter
25	32	40
7.5	10.5	13.5
50	65	80
16.5	19.5	24.0
100	125	150
37.5	42.0	49.5

Friction Coefficient Table (For Steel Pipes and New Pipes) TORISIMA Coefficient

Nominal Diameter	Coefficient of Friction	Nominal Diameter	Coefficient of Friction	Nominal Diameter	Coefficient of Friction	Nominal Diameter	Coefficient of Friction
40	0.0325	125	0.0240	250	0.0220	450	0.0211
50	0.0300	150	0.0233	300	0.0217	500	0.0210
80	0.0267	178	0.0228	350	0.0214	600	0.0208
100	0.0250	200	0.0225	400	0.0213	700	0.0207

Nominal Diameter	Coefficient of Friction	Nominal Diameter	Coefficient of Friction
40	0.0325	50	0.0300
80	0.0267	100	0.0250
125	0.0240	150	0.0233
178	0.0228	200	0.0225
250	0.0220	300	0.0217
350	0.0214	400	0.0213
450	0.0211	500	0.0210
600	0.0208	700	0.0207

Water Drainage Submersible Motor Pump Efficiency (KS B 3621)

Flow (m³/min)	0.10	0.15	0.20	0.30	0.40	0.50	0.60	0.80	1.00	1.50	2.00	3.00	4.00
A Efficiency (%)	30.0	35.5	38.5	43.0	46.0	47.5	49.0	51.0	53.0	55.5	55.5	59.0	60.0
B Efficiency (%)	24.5	29.0	31.5	35.5	37.0	39.0	40.0	42.0	43.5	45.5	46.5	48.5	49.0

Flow (m³/min)	A Efficiency (%)	B Efficiency (%)
0.10	30.0	24.5
0.15	35.5	29.0
0.20	38.5	31.5
0.30	43.0	35.5
0.40	46.0	37.0
0.50	47.5	39.0
0.60	49.0	40.0
0.80	51.0	42.0
1.00	53.0	43.5
1.50	55.5	45.5
2.00	55.5	46.5
3.00	59.0	48.5
4.00	60.0	49.0

Submersible Pump Efficiency for Construction

Flow (m³/min)	0.1	0.2	0.4	0.6	0.8	1.0	1.5	2.0	3.0	4.0	5.0	6.0	8.0
A Efficiency (%)	29.0	35.0	42.0	44.0	46.0	47.0	48.0	49.0	50.0	50.5	51.0	51.5	52.0
B Efficiency (%)	22.0	28.0	33.6	35.2	37.0	37.6	38.4	39.2	40.0	40.5	41.0	41.5	42.0