Electrical connection
5.3 Components
SINAMICS DCP
Operating Instructions, 09/2019, A5E34382853K
43
Precharging circuit fuses
When dimensioning the precharging fuses, the precharging resistors and the precharging
capacitance must be taken into careful consideration.
Fuses with gPV, gS or gR characteristic are suitable for protecting the precharging circuit.
Possible types, 4 A / 1000 V DC:
● Siemens cylindrical fuse cartridge 3NW6004-4
● Siemens SITOR cylindrical fuse cartridge 3NC2304-0MK
Fire and device damage as a result of ground fault/short-circuit
Inadequate installation of the cables to the precharging circuit of the SINAMICS DCP can
result in a ground fault/short-circuit and place persons at risk as a result of the associated
fire and smoke.
• Comply with local installation regulations, which allow this fault to be ruled out.
• Protect the cables from mechanical damage.
• In addition, apply one of the following measures:
– Using cables with double insulation.
– Observe adequate clearances, e.g. through the use of spacers.
– Route the cables in separate cable ducts or pipes.
Line contactors
The following criteria must be used as basis when selecting the main contactors:
● DC contactors must be used.
● Rated voltage and rated current must be selected corresponding to the specific
requirements of the application.
Precharging contactors
Recommended types:
● High-voltage relay: H-507
Type code: H00-04507/11-001128-002/005.00
Coil voltage: 24 V
Manufacturer: Hengstler company
or
● High-voltage relay: RL 42
Coil voltage: 24 V
Manufacturer: SPS Electronic
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