IMPORTANT SAFETY INFORMATION
PRODUCT
PCS6000
DOCUMENT KIND
User manual
DOCUMENT ID.
3BHS600000 E40
REV.
G
LANG.
en
PAGE
2.7. Important note
-
main circuit breaker
The main circuit breaker (MCB) is a major protection device of the converter. If a serious
fault occurs in the converter, the MCB must disconnect the main power supply to the
converter immediately. The main power supply must be disconnected without delay on an
open or trip command from the converter to prevent hazard to the personnel and further
damage to the equipment. The MCB is located on the primary side of the converter
transformer.
NOTE – MCBs and protection relays are not included in the converter supply.
Figure 2–2 Converter system overview
Typical MCBs devices
– Vacuum circuit breakers
– SF6 circuit breakers
– Fused contactors or motor control centers
Dedicated protection relay
– Transformer or converter primary cable protection
– Transformer protection
– Transformer secondary cable protection
– Backing up the converter protection
1) Main power supply
2) MCB control interface
3) Higher-level control system
4) Local MCB control
5) MCB
6) Protection relay
7) Converter transformer
8) Converter
9) Generator
1
2
3
4
5
6
7
8
9
