EBARA E-SPD+ Manual De Instrucciones Y Mantenimento página 7

country in question. A table with the maximum recommended lengths according to the cross-section of the electrical
cable can be found below.
E-SPD+ MT 2200
E-SPD+ TT 4000
E-SPD+ TT 11000
- Each interface cable length for communication and/or pressure transducer should be shorter than 3 meters.
- Use the appropriate cable glands to attach the cable.
- Also ensure that the grid has electrical protection; a high-sensitivity dedicated differential switch (30 mA, class A
for domestic applications, Class B for industrial applications) is particularly recommended.
The type B should be installed for all the residual current-operated protective or monitoring from an
inverter up to the supply voltage.
- In addition to the differential switch, it is advisable to install magneto thermal protection and a voltage disconnect
switch to control the power supply to each Inverter individually.
Ground cable must be connected properly. If the ground cable is not connected, there is an increased risk
of electric shock or fire.
- Use recommended circuit breakers on the supply side as a protection in case of a component failure inside the
inverter. Recommended circuit breaker size are as follows:
Voltage Supply
1∼ 230 Vac
3∼ 400 Vac
3∼ 400 Vac
b) Installation of pressure units with an inverter:
- The multiple pump units must always consist of pumps that are the same and that, therefore, have the same power
and hydraulic performance. Failure to comply with this point can cause the pump system to malfunction.
- For the Inverter to work, it is essential to use a pressure transducer (4-20 mA).
- The location of the pressure transducer must always be as close as possible to the pump unit, as close as possible to
the pressure tank, and always after the non-return valve of the pump unit. It is essential to install a general cut-off
valve for the pump unit, after the physical location of the pressure transducer.
- If there is more than one pressure transducer in a multiple pump unit (more than one Inverter with a pressure
Section of frequency converter input (mm
1,5 2,5
Maximum distance (meters)
8 19
46 76
- 38
) Section of frequency converter output (mm
2
4 1,5
35 12
120 49
61 -
E-SPD+ Model
MT 2200
TT 4000
TT 11000
7
2,5
Maximum distance (meters)
28
81
40
Circuit breaker size
20 A
16 A
32 A
EN
)
2
4
51
134
64