Electrical Installation; How To Connect - Danfoss VLT Instruction Manual

VLT ® HVAC Drive Instruction Manual

4 Electrical installation

4.1 How to connect

4.1.1 Cables General
NOTE!
For the VLT HVAC Drive High Power series line power and motor connections, please see the VLT HVAC Drive
ManualMG.11.FX.YY
NOTE!
Cables General
All cabling must comply with national and local regulations on cable cross-sections and ambient temperature. Copper (140°–167°F
[60°–75°C]) conductors are recommended.
Details of terminal tightening torques.
Power (kW)
Enclo- 200–240 380–480
sure V
A2 1.1–3.0 1.1–4.0
A3 3.7 5.5–7.5
A5 1.1–3.7 1.1–7.5
B1 5.5–11 11–18.5
-
B2
15
B3 5.5–11 11–18.5
B4 11–18.5 18.5–37
C1 18.5–30 37 - 55
C2 37 - 45 75 - 90
C3 18.5–30 37 - 55
C4 30 - 45 55 - 90
D1/D3 - 110 - 132
D2/D4 - 160-250
E1/E2 - 315-450
F1–F4 3) -
Table 4.1: Tightening of terminals
1) For different cable dimensions x/y, where x ≤0.147 in² [95 mm²] and y≥0.147 in² [95 mm²]
2) Cable dimensions above 25 hp [18.5 kW] ≥ 0.0542 in
3) For data on the F-series, please consult VLT
4.1.2 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-circuit
and overcurrent protected according to the national/international regulations.
Short circuit protection
The adjustable frequency drive must be protected against short-circuit to avoid electrical or fire hazard. Danfoss recommends using the fuses mentioned
below to protect service personnel or other equipment in case of an internal failure in the unit. The adjustable frequency drive provides full short circuit
protection in case of a short circuit in the motor output.
.
525–600 Line pow-
V V er
1.8
1.1–7.5 1.8
1.1–7.5 1.8
- 1.8
22 - 4.5
30 - 2)
4.5
11–18.5 1.8
18.5–37 4.5
- 10
-
14/24 1)
-
37 - 55 10
55 - 90 14/24 1)
110 - 132 19
160-315 19
355-560 19
] and below 30 hp [22 kW] ≤ 0.0155 in
2 [35 mm 2
® HVAC Drive High Power Instruction Manual, MG.11.F1.02
MG.11.A9.22 - VLT ® is a registered Danfoss trademark
Torque (Nm)
DC connec-
Motor Brake
tion
1.8 1.8 1.8
1.8 1.8 1.8
1.8 1.8 1.8
1.8 1.5 1.5
4.5 3.7 3.7
2) 3.7 3.7
4.5
1.8 1.8 1.8
4.5 4.5 4.5
10 10 10
14/24 1) 14 14
10 10 10
14/24 1) 14 14
19 9.6 9.6
19 9.6 9.6
19 19 9.6
2 [10 mm
4 Electrical installation
High Power Instruction
Ground Relay
3 0.6
3 0.6
3 0.6
3 0.6
3 0.6
3 0.6
3 0.6
3 0.6
3 0.6
3 0.6
3 0.6
3 0.6
19 0.6
19 0.6
19 0.6
2 ]
4
4-1