Replacement Of Varistor (Only 15-30 Hp); Service Parts And Service Kits; Technical Data; Technical Data - Three-Phase Pumps, 3-10 Hp - Grundfos LFE Instrucciones De Instalación Y Funcionamiento

27.4 Replacement of varistor (only 15-30 hp)

The varistor protects the pump against voltage transients. If
voltage transients occur, the varistor will be worn over time and
need to be replaced. The more transients, the more quickly the
varistor will be worn. When it is time to replace the varistor,
Grundfos GO, R100 and PC Tool E-products will indicate this as a
warning.
A Grundfos technician is required for replacement of the varistor.
Contact your local Grundfos company for assistance.

27.5 Service parts and service kits

For further information on service parts and service kits, visit
www.grundfos.com, select country, select WebCAPS.

28. Technical data

28.1 Technical data - three-phase pumps, 3-10 hp

28.1.1 Supply voltage
3 x 440-480 V - 10 %/+ 10 %, 60 Hz - 2 %/+ 2 %, PE.
3 x 208-230 V - 10 %/+ 10 %, 60 Hz - 2 %/+ 2 %, PE.
2
Cable: Max 10 mm / 8 AWG.
Use min. 158 °F (70 °C) copper conductors only.
Recommended fuse sizes
Motor sizes from 3 to 7.5 hp: Max. 16 A.
Motor size 10 hp: Max. 32 A.
Standard as well as quick-blow or slow-blow fuses may be used.
28.1.2 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
28.1.3 Leakage current
Motor size
[hp]
3 hp (supply voltage < 460 V)
3 hp (supply voltage > 460 V)
5 to 7.5 hp
10 hp
The leakage currents are measured in accordance with EN
61800-5-1.
All manuals and user guides at all-guides.com
28.1.4 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
•
•
•
Sensor signals
•
for 1 min.
nom
•
Leakage current
[mA]
< 3.5
< 5
< 5
Internal power supplies
< 10
•
•
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).
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 = 175
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).
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 = 175
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).
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.
2
).
2
).
2
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2
).
.
2
).
2
).
.
2
).
0.3 - 1.
2
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