Relays And Terminals On Enclosure Size H6; Fuses And Circuit Breakers; Branch Circuit Protection; Short-Circuit Protection - Danfoss VLT Compressor Drive CDS 803 Bedienungsanleitung

VLT® Compressor Drive CDS 803
Operating Guide
1 Mains
2 Ground

3.2.3.4 Relays and Terminals on Enclosure Size H6

95
1
2
3
Illustration 4: Enclosure Size H6, IP20, 380–480 V, 30 kW (40 hp)
1 Mains
2 Motor

3.2.4 Fuses and Circuit Breakers

3.2.4.1 Branch Circuit Protection

To prevent fire hazards, protect the branch circuits in an installation - switch gear, machines, and so on - against short circuits and
overcurrent. Follow national and local regulations.

3.2.4.2 Short-circuit Protection

Danfoss recommends using the fuses and circuit breakers listed in this chapter to protect service personnel or other equipment in
case of an internal failure in the unit or a short circuit on the DC link. The drive provides full short-circuit protection in case of a short
circuit on the motor.

3.2.4.3 Overcurrent Protection

Provide overload protection to avoid overheating of the cables in the installation. Overcurrent protection must always be carried
out according to local and national regulations. Design circuit breakers and fuses for protection in a circuit capable of supplying a
maximum of 100000 A (symmetrical), 480 V maximum.
rms

3.2.4.4 UL/Non-UL Compliance

To ensure compliance with UL or IEC 61800-5-1, use the circuit breakers or fuses listed in this chapter. Circuit breakers must be de-
signed for protection in a circuit capable of supplying a maximum of 10000 A
Danfoss A/S © 2019.12
3
4
99
4
3
4
Compressor
Relays
Ground
Relays
(symmetrical), 480 V maximum.
rms
AQ32174876762701-000101 / 130R0627 | 15
Installation