Knapsack frequency converter application supplying Water in the device in constant voltage
1、Implementation features
(1)Frepuency conversion pump regular way can control 6 pump at most, one kind of water pump is the main, the others are reserves.
(2)Job
pumps and reserve pumps are not extremely firm. When the job pumps have
trouble, we can choose the reserve pump as job, just need connect the
sensor signal line on the new job pump.
(3)The function of the open and close the pump successively
(4)When people stop water, the system stop
(5)System of sleep and wake, a plurality of pump automatic operation.
(6)Antifreeze
(7)The trouble pump withdraws from the function，when the water pump is damaged, let the trouble pump be deactivated automatically.
(8)Protect function : Enter the liquid location to measure an control, HO, LO2Schematic diagram of a circuit
(1)1PH 220V input/3PH 220V output
(2)3PH 380V input /3PH 380V output
(3)Terminal description
S1～S4 Multi function input terminal
DCM Digital signal public terminals
P24 direct-current 24V（maximum current 100mA）
10V frequency setting using in the power
AI The analog voltage input terminal
ACM analog
output terminal（always open，250VAC/3A）
RA，RB input terminal（always open，250VAC/3A）
SG+，SG- RS485 Communication
3 The actual application case of the Knapsack frequency converter application supplying Water in the device in constant voltage
Model frequency converter： NZS0007T2B ( 0.75 kW, 220V)
Parameter setting：
setting of the job pump
P1.04=0，P1.07=8，P1.08=8，P2.01=1，P3.00=2，P3.01=10，P6.00=1，P6.01=1，P6.02=0，P6.03=0,P6.04=6，P6.05=10,P6.15=8，P6.16=3，P6.30=1，P6.31=1，P6.32=1,P7.00=1，P7.01=3，P7.02=1
Setting for the job pump №1
P1.01=5，P1.02=2,P1.04=0，P1.07=8，P1.08=8，P2.01=1，P7.00=1，P7.01，P7.02=2
Setting for the job pump №2
P1.01=5，P1.02=2,P1.04=0，P1.07=8，P1.08=8，P2.01=1，P7.00=1，P7.01，P7.02=3
The control system bring three
water pumps with a frequency changer. One of the three is a job pump, if
the pressure is low, the Frequency conversion start the second pump, if
the press is also low, by now start the third one. When the pressure
achieved , the frequency conversion close the pump successively.
Our products have the following
characteristics: Waterproof, dustproof, PID inset, constant pressure
water supply, it can be used in the poor working conditions, and through
the communication between the inverter can realize intelligent open and
close the pumps.
