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

How to Install

5.2.9 Fuses

Branch circuit protection:
To protect the installation against electrical and fire hazard, all branch circuits in an installation, switchgear or machine,
must be short-circuit and overcurrent-protected according to the national/international regulations.
Short circuit protection:
The adjustable frequency drive must be protected against short circuit in order to prevent electrical or fire hazard. Danfoss
recommends using the fuses mentioned in Table 5.65 and Table 5.66 to protect service personnel or other equipment in
case of an internal failure. The adjustable frequency drive provides full short circuit protection in a short-circuit on the
5 5 motor output.
Overcurrent protection:
To avoid fire hazard due to overheating of the cables, provide overcurrent protection in accordance with national
regulations. The adjustable frequency drive is equipped with internal overcurrent 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 size
D
E
F
Table 5.65 380–480 V, Fuse Recommendations, Frame Sizes D, E and F
Enclosure
size
D
E
F
Table 5.66 525–690 V, Fuse Recommendations, Frame Sizes D, E and F
150
Design Guide
(symmetrical), 500 V/600 V maximum.
rms
Power [kW] Recommended fuse size
N110T4
N132T4
N165
N200T4
N250T4
N315T4
P355-P450
P500-P560
P630-P710
P800-P1M0
Power [kW] Recommended fuse size
N75K
N90K-N160
N200-N400
P450-P500T7
P560-P630T7
P710-P1M0T7
P1M2T7
P1M4T7
Danfoss A/S © Rev. 2014-01-13 All rights reserved.
aR-315
aR-350
aR-400
aR-550
aR-630
aR-800
aR-900
aR-1600
aR-2000
aR-2500
aR-160
aR-160
aR-550
aR-700
aR-900 (500–560)
aR-1600
aR-2000
aR-2500
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
MG16C122