Danfoss VLT HVAC Drive FC 102 Instruction Manual page 53

Electrical Installation
NOTICE!
The recommendations do not cover branch circuit
protection for UL.
Short-circuit protection
Danfoss recommends using the fuses/circuit breakers
mentioned in this section to protect service personnel and
property in case of component breakdown in the
adjustable frequency drive.
Overcurrent protection
The adjustable frequency drive provides overload
protection to limit threats to human life, property damage
and to avoid fire hazard due to overheating of the cables.
The adjustable frequency drive is equipped with an
internal overcurrent protection (parameter 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/
Bussmann
Size/type
PN*
P315 170M4017
P355 170M6013
P400 170M6013
P450 170M6013
Table 4.12 Enclosure Types E, Electrical 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, Electrical Fuses, 380–480 V
MG11F522
Instruction Manual
international regulations and that limit the energy into the
adjustable frequency drive to an equal or lower level than
the compliant circuit breakers.
If fuses/circuit breakers are selected according to
recommendations, possible damage on the adjustable
frequency drive 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
P315-P450
Table 4.11 EN50178 Fuses
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
500 V, or 600 V depending on the adjustable frequency
drive voltage rating. With the proper fusing, the adjustable
frequency drive Short Circuit Current Rating (SCCR) is
100,000 A
Rating
700 A, 700 V 6.9URD31D08A0700
900 A, 700 V 6.9URD33D08A0900
900 A, 700 V 6.9URD33D08A0900
900 A, 700 V 6.9URD33D08A0900
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
Danfoss A/S © 08/2014 All rights reserved.
380–480 V
380–480 V
(symmetrical), 240 V, or 480 V, or
rms
.
rms
Ferraz
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
4
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
51
4