ELECTRONICS GP-MACHINE 1712613 - Caterpillar

when the generator set is in operation.
LOWER PANEL OPEN
6. Circuit breaker. 7. Potential transformers. 8. Current transformers (three). 9. Fuses (F1, F2 and F3).Circuit breaker (6) is a switch that can be closed or opened to connect or disconnect the generator from the electric system. The switch can be closed or opened when the generator set is either in operation or when it is stopped.Wires from current transformers (8), around the cable or bus risers of each phase from the generator set, connect to selector switch (5) and ammeter (3). These transformers make a reduction in the current from the generator to the ammeter. The indication on the ammeter is the amount of current in either the cable or bus risers from the generator.Wires from the secondary windings of potential transformers (7) connect to frequency meter (2), switch (5) and voltmeter (1). The voltage from these transformers is at the correct level of voltage needed to operate the frequency meter and the voltmeter. The level of the voltage from the potential transformers is in a direct relation with the level of voltage in a phase from the generator set and the indication on the voltmeter is the same as the voltage in the phase.
UPPER PANEL OPEN
5. Ammeter and voltmeter switch (on upper panel). 10. Fuses (F4, F5).The identification on a wire in a circuit, in the switchgear, is either a number and a letter or a letter and a number that is followed by number 1, number 2, number 3, etc. For example 3T1 on the wire (see the wiring diagram) is between the fuse (F3) and the potential transformer (PT2). The wire from (PT2) to Fuse (F5) is 3T2. The wire from (F5), in the same circuit, is 3T3. The identification of the circuit is on the wire, near the wire terminal, anyplace in the switchgear.
BASIC SWITCHGEAR WIRING DIAGRAMSwitchgear With Optional Parts
There are floor-standing switchgears that have many optional parts. The upper panel (door) can have many more gauges and controls added to the standard three gauges and switch.The A.C. voltmeter (1), frequency meter (2), A.C. ammeter (3), voltage adjust rheostat control (14) and the ammeter-voltmeter switch (13) are always parts in the upper panel.The watt-hour meter (4) makes a record of the electric energy that was used. When the generator set is in operation, the record of the electric energy used constantly increases.When the generator set is in operation, the indication on power factor meter (5) is a ratio. The ratio is the difference between the kilowatts from the electric set and the product of 1000 X (times) the indication on the ammeter X (times) the indication on the voltmeter.When the generator set is in operation, the indication on wattmeter (6) is the amount of electric energy from the generator set. When the electric energy from the generator set increases, because of an increase in the electric load, the indication on the wattmeter increases.Synchronizing switch (9) is used to either connect synchroscope (7) and synchronizing lights