Protection and features
• Electronic thermal motor protection against overload.
• Temperature monitoring of the heatsink ensures that the adjustable frequency drive
trips if the temperature reaches 203°F ±10°F (95°C ±5° C). An overload temperature
cannot be reset until the temperature of the heatsink is below 158°F ±9°F (70°C ±5°C)
(Guideline — these temperatures may vary for different power sizes, frame sizes,
enclosure, etc.)
• The adjustable frequency drive is protected against short-circuits on motor terminals
U, V, W.
• If a line phase is missing, the adjustable frequency drive trips a warning (depending on
the load).
• Monitoring of the intermediate circuit voltage ensures that the adjustable frequency
drive trips if the intermediate circuit voltage is too low or too high.
• The adjustable frequency drive is protected against ground faults on moto terminals U,
V, W.
9.3 Fuse tables
Non-UL compliance
If UL/cUL is not to be complied with, we recommend using the following fuses, which will
ensure compliance with EN50178:
Table 42: Non-UL compliance, line fuses, 380–480 V
1500–3500 380–480 V type gG
4000–6000 380–480 V type gR
UL compliance
The fuses below are suitable for use on a circuit capable of delivering 100,000 Arms
(symmetrical), 240 V, 480 V, 500 V, or 600 V depending on the drive voltage rating. With
the proper fusing, the drive Short Circuit Current Rating (SCCR) is 100,000 Arms.
Table 43: Frame size D, line fuses, 380–480 V
Size/Type
Fuse options
Bussmann
PN
Littelfuse
PN
Littelfuse
PN
Bussmann
PN
SIBA
PN
Ferraz-
Shawmut
PN
Ferraz-
Shawmut
PN
(Europe)
Ferraz-
Shawmut
PN
(North
America)
1500 170M2619 LA50QS300-4 L50S-300 FWH-300A 20 610
31.315
A50QS300-4 6,9URD31D08
A0315
A070URD31KI
0315
2000 170M2620 LA50QS350-4 L50S-350 FWH-350A 20 610
31.350
A50QS350-4 6,9URD31D08
A0350
A070URD31KI
0350
2500 170M2621 LA50QS400-4 L50S-400 FWH-400A 20 610
31.400
A50QS400-4 6,9URD31D08
A0400
A070URD31KI
0400
3000 170M4015 LA50QS500-4 L50S-500 FWH-500A 20 610
31.550
A50QS500-4 6,9URD31D08
A0550
A070URD31KI
0550
3500 170M4016 LA50QS600-4 L50S-600 FWH-600A 20 610
31.630
A50QS600-4 6,9URD31D08
A0630
A070URD31KI
0630
4500 170M4017 LA50QS800-4 L50S-800 FWH-800A 20 610
31.800
A50QS800-4 6,9URD31D08
A0800
A070URD31KI
0800
9 Technical Specification
Aquavar
®
Intelligent Pump Controller - 150 HP to 600 HP INSTRUCTION MANUAL 159
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