Technical Data - Three-Phase Pumps, 1.1 - 7.5 Kw; Supply Voltage; Overload Protection; Leakage Current - Grundfos CRE Montage- Und Betriebsanleitung

20. Technical data - three-phase pumps,
1.1 - 7.5 kW

20.1 Supply voltage

3 x 380-480 V - 10 %/+ 10 %, 50/60 Hz - 2 %/+ 2 %, PE.
2
Cable: Max 10 mm / 8 AWG.
Use min. 70 °C copper conductors only.
Recommended fuse sizes
Motor sizes from 1.1 to 5.5 kW: Max. 16 A.
Motor size 7.5 kW: Max. 32 A.
Standard as well as quick-blow or slow-blow fuses may be used.

20.2 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

20.3 Leakage current

Motor size
[kW]
1.1 to 3.0 (supply voltage < 460 V)
1.1 to 3.0 (supply voltage > 460 V)
4.0 - 5.5
7.5
The leakage currents are measured in accordance with
EN 61800-5-1.

20.4 Inputs/output

Start/stop
External potential-free contact.
Voltage: 5 VDC.
Current: < 5 mA.
2
Screened cable: 0.5 - 1.5 mm
Digital
External potential-free contact.
Voltage: 5 VDC.
Current: < 5 mA.
2
Screened cable: 0.5 - 1.5 mm
Setpoint signals
• Potentiometer
0-10 VDC, 10 kΩ (via internal voltage supply).
Screened cable: 0.5 - 1.5 mm
Maximum cable length: 100 m.
• Voltage signal
0-10 VDC, R > 50 kΩ.
i
Tolerance: + 0 %/- 3 % at maximum voltage signal.
Screened cable: 0.5 - 1.5 mm
Maximum cable length: 500 m.
• Current signal
= 175 Ω.
DC 0-20 mA / 4-20 mA, R
i
Tolerance: + 0 %/- 3 % at maximum current signal.
Screened cable: 0.5 - 1.5 mm
Maximum cable length: 500 m.
for 1 min.
nom
Leakage current
[mA]
< 3.5
< 5
< 5
< 10
/ 28-16 AWG.
/ 28-16 AWG.
2
/ 28-16 AWG.
2
/ 28-16 AWG.
2
/ 28-16 AWG.
Sensor signals
• Voltage signal
0-10 VDC, R > 50 kΩ (via internal voltage supply).
i
Tolerance: + 0 %/- 3 % at maximum voltage signal.
Screened cable: 0.5 - 1.5 mm
Maximum cable length: 500 m.
• Current signal
= 175 Ω.
DC 0-20 mA / 4-20 mA, R
i
Tolerance: + 0 %/- 3 % at maximum current signal.
Screened cable: 0.5 - 1.5 mm
Maximum cable length: 500 m.
Internal power supplies
• 10 V power supply for external potentiometer:
Max. load: 2.5 mA.
Short-circuit protected.
• 24 V power supply for sensors:
Max. load: 40 mA.
Short-circuit protected.
Signal relay output
Potential-free changeover contact.
Maximum contact load: 250 VAC, 2 A, cos φ 0.3 - 1.
Minimum contact load: 5 VDC, 10 mA.
2
Screened cable: 0.5 - 2.5 mm
Maximum cable length: 500 m.
Bus input
Grundfos bus protocol, GENIbus protocol, RS-485.
Screened 3-core cable: 0.2 - 1.5 mm
Maximum cable length: 500 m.
21. Technical data - three-phase pumps,
11-22 kW
21.1 Supply voltage
3 x 380-480 V - 10 %/+ 10 %, 50/60 Hz - 3 %/+ 3 %, PE.
2
Cable: Max. 10 mm / 8 AWG.
Use min. 70 °C copper conductors only.
Recommended fuse sizes
Motor size [kW]
11
15
18.5
22
Standard as well as quick-blow or slow-blow fuses may be used.
21.2 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
21.3 Leakage current
Earth leakage current > 10 mA.
The leakage currents are measured in accordance with
EN 61800-5-1.
2
/ 28-16 AWG.
2
/ 28-16 AWG.
/ 28-12 AWG.
2
/ 28-16 AWG.
Max. [A]
32
36
43
51
for 1 min.
nom
29