Danfoss VLT User Manual

Overcurrent protection
Provide overload protection to avoid fire hazard due to overheating of the cables in the installation. Overcurrent protection must always be provided in
accordance with national regulations. The adjustable frequency drive is equipped with internal overcurrent protection that can be used for upstream
overload protection (UL applications excluded). See par. 4-18
Current Limit in the VLT HVAC Drive Programming Guide . Fuses must be designed for
protection in a circuit capable of supplying a maximum of 100,000 A
rms
(symmetrical), 500 V/600 V maximum.
Non-UL compliance
If UL/cUL is not to be complied with, Danfoss recommends using the fuses mentioned in the table below, which will ensure compliance with EN50178.
In case of malfunction, not following the recommendation may result in unnecessary damage to the adjustable frequency drive.
Non-UL compliance
Adjustable frequency
drive
Max. fuse size
Voltage Type
200–240 V
1K1-1K5
16A
1
200–240 V type gG
2K2
25A
1
200–240 V type gG
3K0
25A
1
200–240 V type gG
3K7
35A
1
200–240 V type gG
5K5
50A
1
200–240 V type gG
7K5
63A
1
200–240 V type gG
11K
63A
1
200–240 V type gG
15K
80A
1
200–240 V type gG
18K5
125A
1
200–240 V type gG
22K
125A
1
200–240 V type gG
30K
160A
1
200–240 V type gG
37K
200A
1
200–240 V type aR
45K
250A
1
200–240 V type aR
380–480 V
1K1
10A
1
380–500 V type gG
2K2-3K0
16A
1
380–500 V type gG
4K0-5K5
25A
1
380–500 V type gG
7K5
35A
1
380–500 V type gG
11K–15K
63A
1
380–500 V type gG
18K
63A
1
380–500 V type gG
22K
63A
1
380–500 V type gG
30K
80A
1
380–500 V type gG
37K
100A
1
380–500 V type gG
45K
125A
1
380–500 V type gG
55K
160A
1
380–500 V type gG
75K
250A
1
380–500 V type aR
90K
250A
1
380–500 V type aR
1) Max. fuses - see national/international regulations to select an appropriate fuse size.
Table 4.2: Non-UL fuses 200 V to 480 V
Circuit Breakers manufactured by General Electric, Cat. No. SKHA36AT0800, 600 V AC maximum, with the rating plugs listed below can be used to meet
UL requirements.
Size/Type
Rating plug catalog # Amps
P110 SRPK800A300 300
P132 SRPK800A350 350
P160 SRPK800A400 400
P200 SRPK800A500 500
P250 SRPK800A600 600
Table 4.3: Circuit Breaker Tables - D enclosures, 380–480 V
Size/Type
Bussmann PN* Rating Ferraz Siba
P250 170M4017 700 A, 700 V 6.9URD31D08A0700 20 610 32.700
P315 170M6013 900 A, 700 V 6.9URD33D08A0900 20 630 32.900
P355 170M6013 900 A, 700 V 6.9URD33D08A0900 20 630 32.900
P400 170M6013 900 A, 700 V 6.9URD33D08A0900 20 630 32.900
Table 4.4: E enclosures, 380–480 V
4 Electrical installation VLT
®
HVAC Drive Instruction Manual
4-2 MG.11.A9.22 - VLT
®
is a registered Danfoss trademark
4

Danfoss VLT Specifications

General

Frequency	50/60 Hz
Enclosure	IP20, IP21, IP55, IP66
Series	VLT
Control Technique	Flux Vector Control
Output Voltage	0-Vinput
Control Method	Fieldbus
Communication Interface	PROFIBUS, CANopen
Protection Features	Overload, Overvoltage, Undervoltage, Short Circuit, Ground Fault
Cooling Method	Liquid Cooled
Storage Temperature	-25°C to +70°C
Relative Humidity	5-95% non-condensing
Altitude	Up to 1000m (3280ft) without derating, up to 4000m (13120ft) with derating
Operating Temperature	-10°C to +50°C (14°F to 122°F)