Z855 – Z875 Z895 – Z8125 SERIES

TECHNICAL APPENDIX
L6C MOTORS
TABLE OF POWER INCREASE COEFFICIENTS WITH INCREASED WATER TEMPERATURE
MOTOR RATED TEMPERATURE
TYPE POWER °C
kW 35 40 45 50 55 60
L6C all models 1 0,95 0,8 0,75 0,7 0,6
L6c-derating-50_b_te
EXAMPLE:
An L6C, 7.5 kW motor must work in water at a temperature of 45°C.
Motor power at 50°C = 7.5 x 0.8 = 6 kW
MC8 – MC10 – MC12 MOTORS
TABLE OF POWER REDUCTION COEFFICIENTS WITH INCREASED WATER TEMPERATURE
MOTOR RATED TEMPERATURE
TYPE POWER °C
kW 25 30 35 40 45 50 55 60
MC8 (1) all models 1 0,85 0,74 - - - - -
MC8 (2) all models 1 1 1 1 1 0,85 0,75 0,67
MC10 (1) all models 1 0,85 0,74 - - - - -
MC10 (2) all models 1 1 1 1 1 0,85 0,75 0,67
MC12 (1) all models 1 0,85 0,74 - - - - -
MC12 (2) all models 1 1 1 1 1 0,85 0,75 0,67
(1) Standard windings for water temperature up to 35°C. MC-derating-50_a_te
(2) Special windings for water temperature up to 35 °C to 60 °C.
EXAMPLE:
An MC8-75, 55 kW motor must work in water at a temperature of 35°C.
Motor power at 35°C = 55 x 0.74 = 40.7 kW
F6 – F6../316 - F8 MOTORS
TABLE OF POWER INCREASE COEFFICIENTS WITH INCREASED WATER TEMPERATURE
MOTOR RATED TEMPERATURE
TYPE POWER °C
kW 25 30 35 40 45 50 55 60
F6 (1) da 5.5 a 22 1 1 1 1 1 1,14 1,32 1,62
F6, F8 (1) sopra a 22 1 1 1 1 1,14 1,32 1,62 2
(A) Multiply the pump power required by
the increase coefficient from the table.
(B) Select a motor on table whose power is
equal or greater than the calculated value.
(1) Vmin water = 0.91 m/s F6-F8-derating-50_a_te
EXAMPLE:
A Z855 06-F6 pump must pump water at a temperature of 50°C.
The power input can be determined from the diagram relating to the pump.
Pa = Power per stage x no. of stages = 4.6 x 6 = 27.6 kW
The pump requires a 30 kW motor.
Power requirement at 50°C = 30 x 1.32 = 39.6 kW
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