Control Card Performance; Control Characteristics; Connection Tightening Torques - Danfoss VLT FC 280 Operating Manual

Operating Guide | VLT® Midi Drive FC 280

Control Card Performance

9.6.11
Scan interval

Control Characteristics

9.6.12
Resolution of output frequency at 0–500 Hz
System response time (terminals 18, 27, 32, and 33)
Speed control range (open loop)
Speed accuracy (open loop)
Speed accuracy (closed loop)
All control characteristics are based on a 4-pole asynchronous motor.

Connection Tightening Torques

9.7
Make sure to use the right torques when tightening all electrical connections. Too low or too high torque sometimes causes electrical
connection problems. To ensure that correct torques are applied, use a torque wrench. Recommended slot screwdriver type is SZS
0.6x3.5 mm.
Table 66: Tightening Torques
Enclosure Power [kW
size (hp)]
K1 0.37–2.2
(0.5–3.0)
K2 3.0–5.5
(4.0–7.5)
K3 7.5 (10)
K4 11–15
(15–20)
K5 18.5–22
(25–30)
Fuses and Circuit Breakers
9.8
Introduction
9.8.1
Use fuses and/or circuit breakers on the supply side to protect service personnel and equipment from injuries and damage if there is
component breakdown inside the drive (first fault).
134 | Danfoss A/S © 2024.10
Torque [Nm (in-lb)]
Mains Motor
0.8 (7.1) 0.8 (7.1)
0.8 (7.1) 0.8 (7.1)
0.8 (7.1) 0.8 (7.1)
1.2 (10.6) 1.2 (10.6)
1.2 (10.6) 1.2 (10.6)
DC Brake
connection
0.8 (7.1) 0.8 (7.1)
0.8 (7.1) 0.8 (7.1)
0.8 (7.1) 0.8 (7.1)
1.2 (10.6) 1.2 (10.6)
1.2 (10.6) 1.2 (10.6)
1:100 of synchronous speed
±0.5% of nominal speed
±0.1% of nominal speed
Ground Control
1.6 (14.2) 0.4 (3.5)
1.6 (14.2) 0.4 (3.5)
1.6 (14.2) 0.4 (3.5)
1.6 (14.2) 0.4 (3.5)
1.6 (14.2) 0.4 (3.5)
AQ381425076031en-000201 / 130R1223
Specifications
1 ms
±0.003 Hz
≤2 ms
Relay
0.5 (4.4)
0.5 (4.4)
0.5 (4.4)
0.5 (4.4)
0.5 (4.4)