Over-Current Protection; Non Ul Compliance; Max. Fuses - Danfoss vlt FC 102 Operating Instructions Manual

4. Electrical installation

Over-current protection

Provide overload protection to avoid fire hazard due to overheating of the cables in the installation. Over current protection must always be carried out
according to 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
of supplying a maximum of 100,000 A

Non UL compliance

If UL/cUL is not to be complied with, Danfoss recommends using the fuses mentioned in table 4.2, which will ensure compliance with EN50178:
In case of malfunction, not following the recommendation may result in unnecessary damage to the frequency converter.
Frequency
converter
4
200-240 V
1K1-1K5
2K2
3K0
3K7
5K5
7K5
11K
15K
18K5
22K
30K
37K
45K
380-480 V
1K1
2K2-3K0
4K0-5K5
7K5
11K-15K
18K
22K
30K
37K
45K
55K
75K
90K
Table 4.2: Non UL fuses 200 V to 480 V
1) Max. fuses - see national/international regulations for selecting an applicable fuse size.
Danfoss PN
20220
20221
Table 4.3: Additional Fuses for Non-UL Applications, E enclosures, 380-480 V
Size/Type
P355
P400
P500
P560
Table 4.4: E enclosures, 525-600 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.
20
VLT ® HVAC Drive Programming Guide, par. 4-18
(symmetrical), 500 V/600 V maximum.
rms
Max. fuse size
16A 1
25A 1
25A 1
35A 1
1
50A
1
63A
63A 1
1
80A
1
125A
125A 1
1
160A
200A 1
250A 1
10A 1
1
16A
1
25A
1
35A
63A 1
63A 1
63A 1
80A 1
1
100A
1
125A
1
160A
250A 1
250A 1
Bussmann
170M4017
170M6013
Bussmann PN* Danfoss PN
170M4017 20220
170M5013
170M4017 20220
170M5013
170M6013 20221
170M6013 20221
MG.11.A6.02 - VLT
®
VLT HVAC Drive Operating Instructions
. Fuses must be designed for protection in a circuit capable
Voltage
200-240 V
200-240 V
200-240 V
200-240 V
200-240 V
200-240 V
200-240 V
200-240 V
200-240 V
200-240 V
200-240 V
200-240 V
200-240 V
380-500 V
380-500 V
380-500 V
380-500 V
380-500 V
380-500 V
380-500 V
380-500 V
380-500 V
380-500 V
380-500 V
380-500 V
380-500 V
Ferraz
6.9URD31D08A0700
6.9URD33D08A0900
Rating
700 A, 700 V
700 A, 700 V
900 A, 700 V
900 A, 700 V
® is a registered Danfoss trademark
Type
type gG
type gG
type gG
type gG
type gG
type gG
type gG
type gG
type gG
type gG
type gG
type aR
type aR
type gG
type gG
type gG
type gG
type gG
type gG
type gG
type gG
type gG
type gG
type gG
type aR
type aR
Siba
20 610 32.700
20 630 32.900
Losses (W)
85
85
120
120