Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual page 49

Electrical Installation
Overcurrent protection
The frequency converter provides overload protection to
limit threats to human life, property damage and to avoid
fire hazard due to overheating of the cables. The frequency
converter is equipped with an internal overcurrent
protection (4-18 Current Limit) that can be used for
upstream overload protection (UL applications excluded).
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.
The tables in this section list the recommended rated
current. Recommended fuses are of the type gG for small
to medium power sizes. For larger powers, aR fuses are
recommended. Use circuit breakers that meet the national/
UL Compliance
380–480 V, Enclosure types E and F
The fuses below are suitable for use on a circuit capable of delivering 100,000 A
or 600 V depending on the frequency converter voltage rating. With the proper fusing, the frequency converter Short Circuit
Current Rating (SCCR) is 100,000 A
Bussmann
Size/type
PN*
P315 170M4017
P355 170M6013
P400 170M6013
P450 170M6013
Table 4.12 Enclosure Types E, Mains Fuses, 380–480 V
Size/type Bussmann PN*
P500 170M7081
P560 170M7081
P630 170M7082
P710 170M7082
P800 170M7083
P1M0 170M7083
Table 4.13 Enclosure Types F, Mains Fuses, 380–480 V
Size/type Bussmann PN*
P500
P560
P630
P710
P800
P1M0
Table 4.14 Enclosure Type F, Inverter Module DC Link Fuses,
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 500 V UL listed fuse with associated current rating may be used to meet UL requirements.
MG11F502
Operating Instructions
.
rms
Rating
700 A, 700 V
900 A, 700 V
900 A, 700 V
900 A, 700 V
Rating
1600 A, 700 V
1600 A, 700 V
2000 A, 700 V
2000 A, 700 V
2500 A, 700 V
2500 A, 700 V
Rating
170M8611 1100 A, 1000 V
170M8611 1100 A, 1000 V
170M6467 1400 A, 700 V
170M6467 1400 A, 700 V
170M8611 1100 A, 1000 V
170M6467 1400 A, 700 V
Danfoss A/S © 08/2014 All rights reserved.
international regulations and that limit the energy into the
frequency converter to an equal or lower level than the
compliant circuit breakers.
If fuses/circuit breakers are selected according to
recommendations, possible damage on the frequency
converter is mainly limited to damage inside the unit.
Non-UL compliance
If UL/cUL is not to be complied with, use the following
fuses to ensure compliance with EN50178:
P110-P250 380–480 V
P315-P450 380–480 V
Table 4.11 EN50178 Fuses
(symmetrical), 240 V, or 480 V, or 500 V,
rms
Ferraz
6.9URD31D08A0700
6.9URD33D08A0900
6.9URD33D08A0900
6.9URD33D08A0900
Siba
20 695 32.1600
20 695 32.1600
20 695 32.2000
20 695 32.2000
20 695 32.2500
20 695 32.2500
20 781 32.1000
20 781 32.1000
20 681 32.1400
20 681 32.1400
20 781 32.1000
20 681 32.1400
type gG
type gR
Siba
20 610 32.700
20 630 32.900
20 630 32.900
20 630 32.900
Internal Bussmann
option
170M7082
170M7082
170M7082
170M7082
170M7083
170M7083
Siba
47
4 4