Fuses; Fuse Specifications - Danfoss VLT HVAC Drive FC 102 Design Manual

How to Install

5.2.9 Fuses

NOTICE
All fuses mentioned are maximum fuse sizes.
Branch circuit protection
To protect the installation against electrical and fire hazard, all branch circuits in an installation, switch gear or machine,
must be short-circuit and overcurrent protected according to the national/international regulations.
Short circuit protection
The frequency converter must be protected against short-circuit to avoid electrical or fire hazard. Danfoss recommends
using the fuses mentioned in Table 5.13 and Table 5.14 to protect service personnel or other equipment in case of an
internal failure. The frequency converter provides full short circuit protection in a short-circuit on the motor output.
Over-current protection
To avoid fire hazard due to overheating of the cables, provide over-current protection in accordance with national
regulations. The frequency converter is equipped with an internal over current protection that can be used for upstream
overload protection (UL-applications excluded). See 4-18 Current Limit. Fuses must be designed for protection in a circuit
capable of supplying a maximum of 100,000 A

5.2.10 Fuse Specifications

Enclosure Power
size [kW]
N110T4
N132T4
N165
D
N200T4
N250T4
N315T4
E P355-P450
P500-P560
F P630-P710
P800-P1M0
Table 5.13 380-480 V, Fuse Recommendations, Frame Sizes D, E and F
Enclosure Power
size [kW]
N75K
D
N90K-N160
N200-N400
P450-P500T7
E
P560-P630T7
P710-P1M0T7
F P1M2T7
P1M4T7
Table 5.14 525-690 V, Fuse Recommendations, Frame Sizes D, E and F
MG16C202
Design Guide
(symmetrical), 500 V/600 V maximum.
rms
Recommended
fuse size
aR-315
aR-350
aR-400
aR-550
aR-630
aR-800
aR-900
aR-1600
aR-2000
aR-2500
Recommended
fuse size
aR-160
aR-160
aR-550
aR-700
aR-900 (500-560)
aR-1600
aR-2000
aR-2500
Danfoss A/S © Rev. 05/2014 All rights reserved.
Recommended
Max. fuse
aR-315
aR-350
aR-400
aR-550
aR-630
aR-700
aR-900
aR-1600
aR-2000
aR-2500
Recommended
Max. fuse
aR-160
aR-160
aR-550
aR-700
aR-900 (500-560)
aR-1600
aR-2000
aR-2500
137
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