Instruction/ maintenance manual of the product hitachi low current trip function for pumping applications Hitachi
Go to page of 6
Application Note: L300P/SJ300 Low Current Trip Function for Pumping Applications Please refer also to the Inverter Instruction Manual AN081804-1.
L300P/SJ300 Low Current Trip Function for Pumping Applications Sometimes it is desirable to have the inverter trip when running at constant speed and the motor current falls below a certain threshold level. In the case of a pump, this would be indicative of absence of fluid in the pump, and hence no load on the motor.
TIMING CHART Time Output Fre q uenc y [FA1] (N . O.) C041 o [OL] (N.C) o [OL] (N.C) n [OL] AND [FA1 ] n [OL] AND [FA1 ] o n Motor Curren t Hitachi America, Ltd.
TIMING CHART (continued) p q [FA1] (N . O.) C041 Output Fre q uenc y Motor Curren t p q TRIP [OL] (N.C) q [OL] (N.C) p [OL] AND [FA1 ] p [OL] AND [FA1 ] q Hitachi America, Ltd.
WIRING DIAGRAM Outputs Inputs 11A 11C 12A 12C 5 CM1 4 2 1 3 L300P Hitachi America, Ltd. © 2004 Hitachi America, Ltd. Page 5.
SJ300 Setup Since the intelligent outputs are solid state and share a common connection internally, the SJ300 setup is slightly different. Table 2 shows the SJ300 setup. The wiring diagr am is below. Instead of using a logical AND of the two output signals, we use logical OR, which is achieved by paralleling the outputs as shown.
An important point after buying a device Hitachi hitachi low current trip function for pumping applications (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Hitachi hitachi low current trip function for pumping applications yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Hitachi hitachi low current trip function for pumping applications - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Hitachi hitachi low current trip function for pumping applications you will learn all the available features of the product, as well as information on its operation. The information that you get Hitachi hitachi low current trip function for pumping applications will certainly help you make a decision on the purchase.
If you already are a holder of Hitachi hitachi low current trip function for pumping applications, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Hitachi hitachi low current trip function for pumping applications.
However, one of the most important roles played by the user manual is to help in solving problems with Hitachi hitachi low current trip function for pumping applications. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Hitachi hitachi low current trip function for pumping applications along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
