Fuses - Danfoss VLT HVAC Drive FC 100 Operating Instructions Manual

3. How to Install

3.6.14. Fuses

Branch circuit protection
In order to protect the installation against electrical and fire hazard, all branch circuits in an in-
stallation, switch gear, machines etc., must be short-circuited and over-current protected accord-
ing to national/international regulations.
Short-circuit protection
3
The frequency converter must be protected against short-circuit to avoid electrical or fire hazard.
Danfoss recommends using the fuses mentioned below to protect service personnel and equip-
ment in case of an internal failure in the drive. The frequency converter provides full short-circuit
protection in case of a short-circuit on the motor output.
Over-current protection
Provide overload protection to avoid fire hazard due to overheating of the cables in the installation.
The frequency converter is equipped with an internal over-current 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 over-current protection in the installation. Over-current pro-
tection 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
rms
Fuse Tables
Size/
Type
P110
P132
P160
P200
P250
Table 3.5: D enclosures, 380-480 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 480 V UL listed fuse with associated current rating may be used to meet UL
requirements.
Size/Type
P110
P132
P160
P200
P250
P315
Table 3.6: D enclosures, 525-600 V
54
(symmetrical).
Buss- Buss-
mann mann SIBA
E1958 E4273 E180276
JFHR2* T/ RKI/JDDZ
* JDDZ**
FWH- JJS- 2028220-
300 300 315
FWH- JJS- 2028220-
350 350 315
FWH- JJS- 206xx32-
400 400 400
FWH- JJS- 206xx32-
500 500 500
FWH- JJS- 206xx32-
600 600 600
Bussmann
E125085
JFHR2
170M3017
170M3018
170M4011
170M4012
170M4014
170M5011
MG.11.F1.02 - VLT
Buss-
Ferraz-
LittelFuse mann
Shawmut
E71611 E4274
E60314
JFHR2**
JFHR2**
JDDZ**
L50S-300 A50-P300 NOS-
L50S-350 A50-P350 NOS-
L50S-400 A50-P400 NOS-
L50S-500 A50-P500 NOS-
L50S-600 A50-P600 NOS-
SIBA
Amps E180276
JFHR2
315 2061032.315
350 2061032.350
350 2061032.350
400 2061032.400
500 2061032.500
550 2062032.550
® is a registered Danfoss trademark
®
VLT HVAC DRIVE High Power
Operating Instruction
Bussmann Internal
E125085 Option
H/ JFHR2* Bussmann
170M3017 170M3018
300
170M3018 170M4016
350
170M4012 170M4016
400
170M4014 170M4016
500
170M4016 170M4016
600
Ferraz-Shawmut
E76491
JFHR2
6.6URD30D08A0315
6.6URD30D08A0350
6.6URD30D08A0350
6.6URD30D08A0400
6.6URD30D08A0500
6.6URD32D08A0550