Safety And Protection Requirements; Minimum Requirements For Mcb And Mcb Control - ABB ACS5000 User Manual

Safety and protection requirements

Minimum requirements for MCB and MCB control

2 (4)
■ Vacuum circuit breakers
■ SF6 circuit breakers
■ Fused contactors or motor control centers
A dedicated protection relay is used for:
■ Transformer primary cable protection
■ Transformer protection (if applicable)
■ Transformer secondary cable protection (if applicable)
■ Backing up the drive protection
In general, these protective measures are not included in the drive as
provided by ABB.
For safety and protection reasons, the MCB must meet the stipulated
minimum requirements of the specifications of ABB MV Drives. It is the
system integrator's responsibility to ensure that the minimum
requirements are met. The minimum requirements for the MCB are stated
in this note and in the respective MCB specifications, which are available
for each medium voltage drive from ABB.
The safety requirements for the drive are based on the following
standards:
■ ISO 13849-1 Safety of machinery - Safety-related parts of control
systems - Part 1: General principles for design, section 6.2.6
Category 3
■ IEC 60204-1 Safety of machinery - Electrical equipment of machines
- Part 1: General requirements
■ The MCB open and / or trip command has to be wired directly from
the drive to the MCB. It is not permitted to wire the trip command
through any PLC or DCS system if it is not certified to meet SIL 3 level
requirements, and to fulfill the timing requirements outlined below.
Opening of the MCB by the drive must be possible at any time. It is
not permitted to interrupt the open and / or trip command, for example
by a local-remote switch in the MCB.
■ When the MCB is in service position, the drive must have exclusive
control of closing the MCB. Local closing of the MCB is not permitted.
3BHS221906 ZAB E01 Rev. D
ABB
5k A UM