Main Circuit Breaker Protection Device; Figure 2-2 Drive System Overview - ABB ACS1000 User Manual

2.7. Main circuit breaker protection device

The main circuit breaker (MCB) is a major protection device of the drive. If a serious
fault occurs in the drive, the MCB must disconnect the main power supply to the
drive immediately. The main power supply must be disconnected without delay on
an open or trip command from the drive to prevent hazard to the personnel and
further damage to the equipment. The MCB is located on the primary side of the
converter transformer.
1
5

Figure 2-2 Drive system overview

1) Main power supply
2) MCB control interface
3) Higher-level control system
4) Local MCB control
5) MCB
NOTE – MCBs and protection relays are not included in the drive supply.
Typical MCBs devices
– Vacuum circuit breakers
– SF6 circuit breakers
– Fused contactors or motor control centers
Dedicated protection relay
– Transformer or drive primary cable protection (DTL)
– Transformer protection (if applicable)
– Transformer secondary cable protection (if applicable)
– Backing up the drive protection
PRODUCT
ACS1000W
2
6 7
DOCUMENT KIND
User manual
IMPORTANT SAFETY INFORMATION
3
4
8
6) Protection relay
7) Converter transformer
8) Drive
9) Motor
DOCUMENT ID.
3BHS213400 E01
9
REV. LANG. PAGE
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