C650 & C650R User
Manual Page 18
3.4
Power cables connection
This chapter introduces how to wire AC IN/OUT cable to UPS in different modes, and UPS connection with EBM/MBP.
3.4.1 Input /Output wiring specifications
Before wring UPS, upstream breaker and backfeed contactor should be configured to avoid power backfeed to
utility. A “back feed voltage danger” warning label should be added to the backfeed contactor or device.
Backfeed contactor rating current should be larger than UPS rating input current.
The below figures show the wiring system of UPS input and output.
Single phase input system
Read the Safety instructions and adhere to local wiring regulations regarding back feed protection requirements.
Recommended cable minimum cross-sectional:
Model
C650-060-C
C650-100-C
Protective earthing conductor 10mm
2
10mm
2
Input L, N cable
6mm
2
10mm
2
Output L, N cable
6mm
2
10mm
2
Battery cable
6mm
2
10mm
2
The length of the output cable is recommended not to exceed 10 meters, otherwise, it may cause radio
interference. If the length of the output cable is over 10 meters requests, please contact distributors/agents for
details.
3.4.2 Wiring for AC Cable (AC source to UPS)
High leakage current:
Earth connection essential before connecting supply.
This type of connection must be carried out by a qualified electrical person.
Before carrying out any connection, check that the upstream protection devices (Normal AC source and Bypass AC source)
are open "O" (Off).
Always connect the ground wire first.
