Viessmann EM-100/173, Техническое описание

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Control system (BMS 2007)
14 CHP switching cabinet
VITOBLOC 200
5780078
GB
The specific functions:
Mains monitoring
Mains monitoring checks whether it is above or below the five limits listed below:
The limits and response times are adjustable (EVU level). If mains monitoring detects an unacceptable deviation
from limits and the response time has expired, the cogeneration module will be disconnected from the mains by
turning off the alternator contact. It is enabled again if the mains are within limits within 3 seconds. The machine idles
10 seconds if the network breakdown > 3 seconds. The cogeneration module goes into stand-by operation if external
stand-by operation selection is made within these 10 seconds. Otherwise, the cogeneration module is shut down.
The set mains settling time expires before the system goes into parallel operation after system recovery.
Alternator voltage monitoring
Alternator voltage monitoring leads to one of the two malfunctions listed below if at least one of the three phases of
mains voltage is outside of set limits (level 3):
Alternator current monitoring
Monitoring checks to see whether the alternator current is unacceptably high or whether the three current-phases
have excessively high deviations among one another (limits level 3). There is also hardware-supported alternator
current monitoring that works with a thermo-magnetic trip in the feed switch. If there is a malfunction, it generates at
least one of the fault messages below.
Speed regulation and monitoring
Speed is recorded by the pick-up and the control system regulates speed by passing on an analog target value (0
–
10 V) to the governor. Speed monitoring generates the two malfunctions below in the case of an unacceptable
deviation from the appropriate limit:
Tab. 15 Description of the functions, Part 1
– mains, alternator voltages, alternator current monitoring and speed regulation or
monitoring
excess mains voltage
low mains voltage
excess mains frequency
low mains frequency
vector jump
excess alternator voltage
low alternator voltage
excess alternator current
alternator load imbalance
feed switch malfunctioning
overspeed
speed <50 Upm or pick-up defective