Control system (BMS 2007)
VITOBLOC 200
CHP switching cabinet
15
5780078
GB
Synchronising
You can use speed regulation to synchronise the alternator to the connected mains.
The following criteria are included for issuing the enabling pulse:
oil pressure and oil level monitoring
Oil pressure is monitored with a 4-20 mA oil pressure sensor that transforms oil pressure into an analog signal where
the range of 0-10 bar is transformed into 4-20 mA. The oil pressure plausibility is also monitored when the machine is
stationary. A floater switch automatically refills the oil. A digital limit contact indicates to the control system that a
malfunction has occurred if the oil level still drops below the acceptable limit generating the following fault messages:
cooling water, exhaust gas and alternator temperature monitoring
The hardware records the following malfunctions and gives the control system a message via digital contacts:
cooling water pump malfunctioning (tripped by motor protection switch)
minimum cooling water pressure (tripped by pressure switch)
safety temperature limiter (tripped by thermostat at 99° C and the cogeneration module is shut down via emergency
stop chain)
Alternator temperature monitoring (tripped by the temperature switch in the alternator windings)
The cooling water temperature is recorded with a PT 100 and the exhaust gas temperature is recorded with a NiCrNi
temperature sensor and transmitted directly to the control system via analog measurement converter. It evaluates the
following faults:
– maximum cooling water temperature
– maximum exhaust gas temperature
– minimum exhaust gas temperature (sensor short-circuit)
Tab. 16 Description of the functions, Part 2
– synchronising, oil pressure, oil levels, cooling water, exhaust gas and alternator
temperature monitoring
frequency difference 0.0
–0.5 Hz (EVU level)
voltage difference 0
–40 V (EVU level)
phase angle difference 0
–10° (EVU level)
synchronising time monitoring (level 3)
minimum oil pressure
oil pressure malfunctioning
minimum oil level
