Fuses - Danfoss VLT Automation Drive FC 300 Instruction Manual

VLT ® Automation Drive FC 300
Instruction Manual High Power
3.6.12 External Fan Supply
If the adjustable frequency drive is supplied by DC or if the fan must run independently of the power supply, an external power supply can be applied.
The connection is made on the power card.
Terminal No.
100, 101
102, 103
The connector located on the power card provides the AC line voltage connection for the cooling fans. The fans are factory-equipped to be supplied from
a common AC line (jumpers between 100-102 and 101-103). If an external supply is needed, the jumpers are removed and the supply is connected to
terminals 100 and 101. A 5 Amp fuse should be used for protection. In UL applications, this should be a LittleFuse KLK-5 or equivalent.

3.6.13 Fuses

Branch circuit protection:
In order to protect the installation against electrical and fire hazard, all branch circuits in an installation, switch gear, machines, etc., must be short-
circuited and overcurrent protected according to 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 below to protect service personnel and equipment in case of an internal failure in the drive. The adjustable frequency drive provides full short-
circuit protection in case of a short-circuit on the motor output.
Overcurrent protection
Provide overload protection to avoid fire hazard due to overheating of the cables in the installation. The adjustable frequency drive is equipped with
internal overcurrent protection that can be used for upstream overload protection (UL applications excluded). See par. 4-18. Moreover, fuses or circuit
breakers can be used to provide the overcurrent protection in the installation. Overcurrent protection must always be carried out according to national
regulations.
Fuses must be designed for protection in a circuit capable of supplying a maximum of 100,000 A
Fuse Tables - High Power
Bussmann Bussmann
Size/
E1958 E4273
Type
JFHR2** T/JDDZ**
P90K FWH- JJS-
300 300
P110 FWH- JJS-
350 350
P132 FWH- JJS-
400 400
P160 FWH- JJS-
500 500
P200 FWH- JJS-
600 600
Table 3.4: D enclosures, 380-500 V
*170M fuses from Bussmann shown use the -/80 visual indicator, -TN/80 Type T, -/110 or TN/110 Type T indicator fuses of the same size and amperage
may be substituted for external use
**Any minimum 500 V UL listed fuse with associated current rating may be used to meet UL requirements.
Function
Auxiliary supply S, T
Internal supply S, T
SIBA LittelFuse
E180276 E71611
RKI/JDDZ JFHR2**
2028220- L50S-300
315
2028220- L50S-350
315
206xx32- L50S-400
400
206xx32- L50S-500
500
206xx32- L50S-600
600
MG.33.U2.22 - VLT ® is a registered Danfoss trademark
(symmetrical).
rms
Ferraz-
Bussmann Bussmann
Shawmut
E4274 E125085
E60314
H/JDDZ** JFHR2*
JFHR2**
A50-P300 NOS- 170M3017
300
A50-P350 NOS- 170M3018
350
A50-P400 NOS- 170M4012
400
A50-P500 NOS- 170M4014
500
A50-P600 NOS- 170M4016
600
3 How to Install
3
Internal
Option
Bussmann
170M3018
170M3018
170M4016
170M4016
170M4016
3-51