ABB REF542plus - Binary Input Commissioning

Multifunction Protection and Switchgear Control unit REF542plus
Manual: Motor Protection with ATEX-Certification
Additional safety standards
Warning! The following safety standards must be observed in all circumstances:
1. IEC 60255 for protection relays in high-voltage substations
2. DIN 57627 plug connections
Working on and operating the device
Note Only qualified personnel may work on and operate the device.
Qualified personnel are:
Entrusted with the setup, installation, commissioning and operation of the device and
the system in which it is installed.
Qualified and authorized to conduct switching operations in accordance with the
standards of safety engineering. This specifically includes switching on and off, isolat-
ing, grounding and signage.
Trained in safety engineering standards and are familiar with the maintenance and
use of safety equipment.
Trained in first aid.
6.3.3 Risk analysis and safety measures
The risk analysis and the safety measures are mentioned in [DO1]. It can be con-
cluded, that the motor protection function in the REF542plus can fulfil the requirement
class 3 of DIN V 19250. By means of the watch-dog function all emergency situation
can be detected in order to switch off the protected motor. Consequently disturbances
with possibly environment pollution can be avoid, even if the process is unmanned.
U<
REF542plus
-X21:
z30
z32
d30
L+
L-
Undervoltage
Release Coil
of the CB
WD
Figure 14: Tripping of the circuit breaker by undervoltage release coil
Above figure shows an example of a possible tripping of the circuit breaker in connec-
tion with the watch dog function in case of system failure. The watch dog function
controls a relay with an normally open and normally close contact. In normal opera-
tion condition the normally open contact, which is always in closed position, is con-
nected to a undervoltage release coil. The undervoltage release coil is supplied by a
separate uninterruptible power supply. In case of an appearing system fault the circuit
is opened by the watch dog contact and the circuit breaker will be trip mechanically.
Note Referring to DIN EN 954-1 of March 1997 the REF542plus fulfills the requirements
according to category 2. In this case the failure will be detected by the implemented
self supervision function, where the watch dog relay is directly wired to the release
coil in order to trip the circuit breaker immediately.
1VTA100114-Rev. 04 en PTMV, 19.01.05 Motorprotection 40 / 66
Valid from Version V4D02