4.1.12 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 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
Current Limit
. Moreover, fuses 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 following fuses, which will ensure compliance with EN50178:
P110 - P250 380 - 480 V type gG
P315 - P450 380 - 480 V type gR
380-480 V, frame size D
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.
Size/
Type
Bussmann
E1958
JFHR2**
Bussmann
E4273
T/JDDZ**
SIBA
E180276
JFHR2
LittelFuse
E71611
JFHR2**
Ferraz-
Shawmut
E60314
JFHR2**
Bussmann
E4274
H/JDDZ**
Bussmann
E125085
JFHR2*
Internal
Option
Bussmann
P110 FWH-
300
JJS-
300
2061032.315 L50S-300 A50-P300 NOS-
300
170M3017 170M3018
P132 FWH-
350
JJS-
350
2061032.35 L50S-350 A50-P350 NOS-
350
170M3018 170M3018
P160 FWH-
400
JJS-
400
2061032.40 L50S-400 A50-P400 NOS-
400
170M4012 170M4016
P200 FWH-
500
JJS-
500
2061032.50 L50S-500 A50-P500 NOS-
500
170M4014 170M4016
P250 FWH-
600
JJS-
600
2062032.63 L50S-600 A50-P600 NOS-
600
170M4016 170M4016
Table 4.1: Frame size D, Line fuses, 380-480 V
ADAP-KOOL
®
Drive AKD 102 High Power 4 Electrical Installation
MG.11.O1.02 - ADAP-KOOL
®
is a registered Danfoss trademark
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