Fuses - Danfoss VLT FC 100 Operating Instructions Manual

4 Electrical Installation

4.1.14 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 over-current protected according to 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
below to protect service personnel and equipment in case of an internal failure in the frequency conveter. The frequency converter provides full short-
circuit protection in case of a short-circuit on the motor output.
Over-current protection
4 Provide overload protection to avoid fire hazard due to overheating of the cables in the installation. The frequency converter is equipped with an inter-
nal over-current protection that can be used for upstream overload protection (UL-applications excluded). See par. 4-18
or circuit breakers can be used to provide the over-current protection in the installation. Over-current protection must always be carried out according
to national regulations.
Non UL compliance
If UL/cUL is not to be complied with, we recommend using the follow-
ing fuses, which will ensure compliance with EN50178:
380-480V, frame sizes D, E and F
The fuses below are suitable for use on a circuit capable of delivering 100,000 Arms (symmetrical), 240V, or 480V, or 500V, or 600V depending on the
drive voltage rating. With the proper fusing the drive Short Circuit Current Rating (SCCR) is 100,000 Arms.
Bussmann
Size/
E1958
Type
JFHR2**
P110 FWH-
300
P132 FWH-
350
P160 FWH-
400
P200 FWH-
500
P250 FWH-
600
Table 4.2: Frame Size D, Line Fuses, 380-480V
Buss-
Size/
mann Rating
Type
PN*
P315 170M4 700A,
017 700V
P355 170M6 900A,
013 700V
P400 170M6 900A,
013 700V
P450 170M6 900A,
013 700V
Table 4.3: Frame Size E, Line Fuses, 380-480V
66
Bussmann SIBA LittelFuse
E4273 E180276
T/JDDZ** JFHR2 JFHR2**
JJS- 2061032.315
300
JJS- 2061032.35
350
JJS- 2061032.40
400
JJS- 2061032.50
500
JJS- 2062032.63
600
Ferraz Siba
6.9URD31D08A0 20 610 32.700
700
6.9URD33D08A0 20 630 32.900
900
6.9URD33D08A0 20 630 32.900
900
6.9URD33D08A0 20 630 32.900
900
MG.11.F3.02 - VLT
VLT HVAC Drive High Power Operating In-
P110 - P250
P315 - P450
UL Compliance
Ferraz-
Bussmann
Shawmut
E71611 E4274
E60314
H/JDDZ**
JFHR2**
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-
® is a registered Danfoss trademark
Current Limit . Moreover, fuses
380 - 480 V type gG
380 - 480 V type gR
Bussmann Internal
E125085 Option
JFHR2* Bussmann
170M3017 170M3018
300
170M3018 170M3018
350
170M4012 170M4016
400
170M4014 170M4016
500
170M4016 170M4016
600
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