Grundfos SE1 50 Notice D'installation Et De Fonctionnement page 27

6.8.1 SE dual voltage concept
To standardize the SE product portfolio, a 61R
voltage variant is available. It is a dual-voltage
(230 V / 460 V), three phase, 60 Hz Direct-On-
Line (DOL) connected motor.
• Connect 230 V pumps using the low-voltage
(delta) connection.
• Connect 460 V pumps using the high-voltage
(star) connection.
61R 230 V DOL wired in low-voltage (delta)
connection
61R, 460 V DOL wired in high-voltage (star)
connection
The 61R voltage variant provides a large voltage
range for supply power.
Stated
Percentage
voltage
variation
[V]
230 ± 10 %
Motor-protection wiring diagram
Position
F1 + F2
B1 + B2
Voltage range
[V]
207-253
Stated
Percentage
voltage
variation
[V]
460 ± 10 %
1
F2
F1
S1
ON
F3
F3
S2
OFF
Q1
B1
PE
M
M1 B2
3~
Q1
Description
S1 On switch
S2 Off switch
Fuse
F3 Motor-protection switch
Q1 Contactor
Thermal switch in motor
M1 Motor
Voltage range
[V]
414-506
2
Q1
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