IMPORTANT SAFETY INFORMATION
PRODUCT
ACS1000W
DOCUMENT KIND
User manual
DOCUMENT ID.
3BHS213400 E01
REV.
J
LANG.
en
PAGE
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
specifications, which are available for each medium voltage drive from ABB.
The safety requirements for the drive are based on the following standards:
–
–
2.7.2. Minimum requirements for MCB and MCB control
The following safety requirements are also in the MCB specifications for the drive:
–
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:
120 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:
250 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.
