Safety And Protection Requirements; Maintenance Recommendation - ABB ACS5000 User Manual

2.7.1. Safety and protection requirements

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
engineering guideline, 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
– IEC 60204-1
2.7.2 Minimum requirements for MCB and MCB control
– 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 three-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, eg, 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.
– The maximum opening time of the MCB must never exceed the product- or
project-specific maximum time defined in the MCB specifications. Typical
maximum values for the drive are defined as follows:
• Maximum protection trip time: 75 ms
The maximum protection trip time is the maximum allowed breaking time
(open and arcing) of the breaking device after the open command has been
initiated to prevent further damage to the drive, such as diode failures.
• Maximum safety trip time: 500 ms
The maximum safety trip time is the maximum allowed time to ensure safe
disconnection of the main power supply to prevent any hazard to
personnel.
For more information on the MCB requirements, control interface and control
philosophy, see "Main circuit breaker engineering guideline" (3BHS125149 E50).

2.7.3. Maintenance recommendation

The MCB trip circuits should be checked annually once per year.
PRODUCT
ACS5000W
DOCUMENT KIND
User manual
IMPORTANT SAFETY INFORMATION
DOCUMENT ID.
3BHS799208 E01
REV. LANG. PAGE
F en 30/178