2.10.5. FORCED RUNNING OR SAFETY FIREPROOF (18) UNI 9490 NFPA NFS61.940
It forces the feeding and it avoids the stop with any type of alarm, the stop can be effected only manually.
Connecting the 18 to –B, the gen-set intervenes for the foreseen commands (mains failure, remote start, test, ets) and during the
working the feeding is forced; this is showed on the display and the acoustic alarm is activated. The gen-set is in feeding up to manual
stop command. When the command is active (18 to –B), on the display it is displayed “FORCED RUNNING”.
If during the running the command to the 18 is removed, the normal functions are activated (automatic stop); in this condition the time of
“delay stop” (cooling engine) is programmed to a fixed time of 60”.
Programming
There are two options:
1. bringing to 1(one) the stop time, the command “FORCED RUNNING” is activated only giving a –B to the 18;
2. bringing to 0(zero) the stop time, the command of forced running is permanent, namely to every start the gen-set has the
deactivates protections and the stop is only manual, with out any command to the 18 which is available for others running
modes.
In setting times, to adjust the time of stop to 0 or 1
Note: for the adjustment to the rules of safety fireproof, the double system of start can be required, to see 2.11.7.
2.10.6. FUNCTION FOR TWO UNITS WORKING ALTERNATELY
Connections 18 and 20 are provided for the (RES) standby function. It is used in plants that have a standby unit.
Two applications are provided for:
1. Two units, one in standby, and to provide an emergency supply in case of a power failure;
2. Two units, one is standby, to act as a power source, without a mains power supply.
2.10.7. MAINS POWER SUPPLY EMERGENCY BACKUP
When a power failure occurs, the pilot generator starts up. Should it fail to start, or should any fault occur during its operation, the
standby generator starts up to provide sufficient power for the user.
Programming: in SPECIAL SETTINGS to select 2 GEN. CHANGE, with the connection to the mains the M02 is programmed selfit for the
function of two gen-set of reserve in emergency to the mains.
2.10.8. POWER SUPPLY PLANT WITH TWO GENERATORS, ONE ON STANDBY
The pilot generator starts up when the START command is given via connection 18. The operating time is set on the Times Menu. At
the end of this time the standby generator is started and once it is at ful production the signal to the pilot generator is switched off and
the power is supplied by the standby generator, with power to the user being interrupted for 1 second. When the set time for the standby
generator expires, the pilot generator is activated using the same procedure.
When the unit is running, any fault automatically causes the other generator to be activated.
Programming: in SPECIAL SETTINGS to select 2 GEN. CHANGE
To determine which is the PILOT unit, select on the display the page 2 GEN. CHANGE The display will read Pilot/Standby. When the
Reset button is pressed, the Pilot/Standby selection is reversed. Bear in mind that if, for example, GE1 is the pilot unit, GE2 must be the
Standby unit, and vice versa.
The built-in clock can be used to programme automatic interventions by the two-generator power plant.
When the cut-out function is programmed using the built-in clock, the individual generator is excluded for the hours
programmed. Obviously, the times set for the two generators must be compatible.
Since a break in the power supply to the generator M02 module results in the clock losing its setting, it is advisable to use two
40A diodes (D1 and D2) to provide power. If the built-in clock is not used, these diodes are not necessary.
This circuit with diodes on the battery can only be used for plants without battery charges, powered by the mains power supply.
Connection layout
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