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  • Instruction for Automatic Parallel Cabinet

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    Instruction for Automatic Parallel Cabinet

    1. Manual operation

    1.1 Before starting, check if the phase sequence is correct. Before the phase sequence has been confirmed, the control switch (SA3) for the public part can’t switch. After the debug operations for the generator set, this step can be omitted.

    1.2 The selector switch on the operation screen will be placed in the “manual” (MAN) position.

    1.3 Starting the first generating set.

    1.4 After the generator set has started normally. Press the “switch on” key, air brake switch is just on.

    1.5 Starting the second generator set.

    1.6 After the power production is normal, check if the two generator sets voltage and frequency are consistent; if inconsistent, adjust until consistent. Then press the “switch on” key; after the test of the automatic synchronizer, the set will switch on. 1.7 When stopped, as in the case of parallel operation and loading, in order to avoid damage to load air switch and generator and to keep the power supply quality of the other generator, the Parallel Cabinet has the function of “soft” unloading to adjust speed to slowly reduce machine speed, gradually reducing the load to a certain value, then “locking”, then shutdown.

    1.8 In case of emergency, just turn the urgent stop switch, and the generator will shutdown.

    1. Automatic operation

    2.1 The selector switch on the operation screen will be placed in “automatic” (AUTO) position.

    2.2 When the electric supply stopped, the first generating set will self-start firstly. (can also be manually).

    2.3 The first generator has started normally, then should be delayed for 5 seconds (can be adjustable for normal operation), directly merging into the total electricity flow and supplying the electric power.

    2.4 After the first generator set has started for 2 seconds, the second generator set self-start and delay 5 seconds (can be adjustable for normal operation); its speed is controlled by synchronizer. When the second generator set voltage, frequency and phase are same as the total electricity flow ones; the synchronizer will show the signal of switching on.

    2.5 Under the status of the single machine running, if one of them fails, then the second one will self-start.

    2.6 When the loading air switch on the control panel of the parallel generator set is on, the power balancer starts working. The all loading generator power of will automatically balance according to the preset load distribution parameters.

    2.7 When stopped, as in the case of parallel operation and loading, in order to avoid damage to load air switch and generator and to keep the power supply quality of the other generator, the Parallel Cabinet has the function of “soft” unloading to adjust speed to slowly reduce machine speed, gradually reducing the load to a certain value, then “locking”, then shutdown.

    2.8 In case of emergency, just turn the urgent stop switch, and the generator will shutdown.

     

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