Technical Data - Three-Phase Pumps, 15-30 Hp; Overload Protection; Leakage Current - Grundfos LFE Instrucciones De Instalación Y Funcionamiento

28.2 Technical data - three-phase pumps, 15-30 hp

28.2.1 Supply voltage
3 x 440-480 V - 10 %/+ 10 %, 60 Hz - 3 %/+ 3 %, PE.
Cable: Maximum. 8 AWG (10 mm
Use min. 158 °F (70 °C) copper conductors only.
Recommended fuse sizes
Motor size [hp]
15
20
25
30
Standard as well as quick-blow or slow-blow fuses may be used.

28.2.2 Overload protection

The overload protection of the E-motor has the same
characteristic as an ordinary motor protector. As an example, the
E-motor can stand an overload of 110 % of I

28.2.3 Leakage current

Ground leakage current > 10 mA.
The leakage currents are measured in accordance with EN
61800-5-1.
28.2.4 Inputs/output
Start/stop
External potential-free contact.
Voltage: 5 VDC.
Current: < 5 mA.
Screened cable: 20-16 AWG (0.5 - 1.5 mm
Digital
External potential-free contact.
Voltage: 5 VDC.
Current: < 5 mA.
Screened cable: 20-16 AWG (0.5 - 1.5 mm
Setpoint signals
• Potentiometer
0-10 VDC, 10 k (via internal voltage supply).
Screened cable: 20-16 AWG (0.5 - 1.5 mm
Maximum cable length: 328 ft (100 m).
• Voltage signal
0-10 VDC, R > 50 k .
i
Tolerance: + 0 %/- 3 % at maximum voltage signal.
Screened cable: 20-16 AWG (0.5 - 1.5 mm
Maximum cable length: 1640 ft (500 m).
• Current signal
DC 0-20 mA / 4-20 mA, R = 250
i
Tolerance: + 0 %/- 3 % at maximum current signal.
Screened cable: 20-16 AWG (0.5 - 1.5 mm
Maximum cable length: 1640 ft (500 m).
52
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Sensor signals
• Voltage signal
0-10 VDC, R > 50 k (via internal voltage supply).
i
Tolerance: + 0 %/- 3 % at maximum voltage signal.
Screened cable: 20-16 AWG (0.5 - 1.5 mm
Maximum cable length: 1640 ft (500 m).
• Current signal
DC 0-20 mA / 4-20 mA, R = 250
i
Tolerance: + 0 %/- 3 % at maximum current signal.
Screened cable: 20-16 AWG (0.5 - 1.5 mm
Maximum cable length: 1640 ft (500 m).
Internal power supplies
• 10 V power supply for external potentiometer:
Maximum load: 2.5 mA.
Short-circuit protected.
• 24 V power supply for sensors:
Maximum load: 40 mA.
Short-circuit protected.
Signal relay output
Potential-free changeover contact.
Maximum contact load: 250 VAC, 2 A, cos
Minimum contact load: 5 VDC, 10 mA.
Screened cable: 28-12 AWG (0.5 - 2.5 mm
Maximum cable length: 1640 ft (500 m).
Bus input
Grundfos bus protocol, GENIbus protocol, RS-485.
Screened 3-core cable: 28-16 AWG (0.2 - 1.5 mm
Maximum cable length: 1640 ft (500 m).
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