Megging; Technical Data, Single-Phase Motors; Supply Voltage; Leakage Current - Grundfos CRE Series Installation And Operating Instructions Manual

16. Megging

Megging of an installation incorporating MGE
Caution
motors is not allowed, as the built-in electronics
may be damaged.

17. Technical data, single-phase motors

17.1 Supply voltage

• 1 x 200-240 V - 10 %/+ 10 %, 50/60 Hz, PE
Check that the supply voltage and frequency correspond to the
values stated on the nameplate.
Recommended fuse size
Motor size
[HP]
1/2 - 1
1 1/2 - 2
Standard as well as quick-blow or slow-blow fuses may be used.

17.2 Leakage current

Ground leakage current < 3.5 mA (AC supply).
Ground leakage current < 10 mA (DC supply).
The leakage currents are measured in accordance with EN
61800-5-1:2007.

18. Technical data, three-phase motors

18.1 Supply voltage
• 3 x 380-500 V - 10 %/+ 10 %, 50/60 Hz, PE.
Check that the supply voltage and frequency correspond to the
values stated on the nameplate.
Recommended fuse size
Motor size
[HP]
1 - 1 1/2
2 - 3
Standard as well as quick-blow or slow-blow fuses may be used.
18.2 Leakage current
Motor size
[HP]
1 - 3
(supply voltage < 400 V)
1 - 3
(supply voltage > 400 V)
The leakage currents are measured in accordance with EN
61800-5-1:2007.
38

19. Inputs/outputs

Ground reference (GND)
All voltages refer to GND
All currents return to GND.
Absolute maximum voltage and current limits
Exceeding the following electrical limits may result in severely
reduced operating reliability and motor life:
Relay 1:
Maximum contact load: 250 VAC, 2 A or 30 VDC, 2 A.
Relay 2:
Maximum contact load: 30 VDC, 2 A.
GENI terminals: -5.5 to 9.0 VDC or < 25 mADC.
Other input/output terminals: -0.5 to 26 VDC or < 15 mADC.
Min. Max.
[A] [A]
Digital inputs (DI)
Internal pull-up current > 10 mA at V
6 10
Internal pull-up to 5 VDC (currentless for V
10 16
Certain low logic level: V
Certain high logic level: V
Hysteresis: No.
Screened cable: 28-16 AWG / 0.5 - 1.5 mm
Maximum cable length: 1640 ft.
Open-collector digital outputs (OC)
Current sinking capability: 75 mADC, no current sourcing.
Load types: Resistive or/and inductive.
Low-state output voltage at 75 mADC: Max. 1.2 VDC.
Low-state output voltage at 10 mADC: Max. 0.6 VDC.
Overcurrent protection: Yes.
Screened cable: 28-16 AWG / 0.5 - 1.5 mm
Maximum cable length: 1640 ft.
Analog inputs (AI)
Voltage signal ranges:
Min. Max. •
[A] [A]
•
6 6
•
6 10 Voltage signal: R
Leak currents may occur at high operating temperatures. Keep
the source impedance low.
Current signal ranges:
•
Leakage current
•
[mA]
Current signal: R
Current overload protection: Yes. Change to voltage signal.
< 3.5
Measurement tolerance: - 0/+ 3 % of full scale (max.-point
coverage).
< 5
Screened cable: 28-16 AWG / 0.5 - 1.5 mm
Maximum cable length: 1640 ft (excl. potentiometer).
Potentiometer connected to +5 V, GND, any AI:
Use maximum 10 kΩ.
Maximum cable length: 328 ft.
< 1.5 VDC.
i
> 3.0 VDC.
i
0.5 - 3.5 VDC, AL AU.
0-5 VDC, AU.
0-10 VDC, AU.
> 100 kΩ at 77 °F.
i
0-20 mADC, AU.
4-20 mADC, AL AU.
= 292 Ω.
i
= 0 VDC.
i
> 5 VDC).
i
2
.
2
2
.