3.6 Electrical Connection
Observe Safety Information 0.2.
Customers must make sure that the grounding wire is connected, and the
grounding function meets the electric rules (cf. Fig. 3.4 LHS).
Check if the voltage of the power supply is correct; and the rated current
of the NFB (No Fuse Breaker) at the customer’s site meets the values in
the table listed below.
With all types of LV pumps, too, a short-circuit protection must be installed
at the connection side.
Refer to the national and local electrical regulations, and decide the proper
specification for the wire and NFB to ensure the safety of electricity usage.
Recommended rated current of main fuse and cable sizes
The voltage for the power supply should be kept within ±10% of the rating
voltage.
DANGER
Δ200 – 220V Y380 – 460V (50/60 Hz)
Main fuse Cable Size (mm
2
) Relay (A) Main fuse Cable Size (mm
2
) Relay (A)
LV 80 20A 4 16 15A 2.5 10
LV 140 30A 6 24 20A 4 15
LV 250 40A 6 28 30A 4 16A
Thermal switch casing;
SW85 - white
Thermal switch
motor;
SW90 - black
PT1000 - white
Fig. 3.3 Thermal switch positions
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