TURBOCHARGER GP 2W7277 - Caterpillar

Introduction
The floor-standing switchgear is used to either connect or disconnect a generator set from an electric system. Gauges on the switchgear operate when the generator set is in operation. The indications on the gauges are the amount of electric power produced by the generator set.The floor-standing switchgear is a cabinet with both an upper and a lower panel (door) with hinges. Because of the hinges on each panel, either the upper panel or the lower panel can be opened either separately or both panels together.The floor-standing switchgear is designed for voltage phase rotation 1, 2 and 3 or A, B and C. Some gauges and switches will not correctly operate if connected in voltage phase rotation 1, 3 and 2 or A, C and B. When the switchgear is viewed from the front (toward the gauges and switch controls) the voltage phase rotation of the cables, from the generator to the circuit breaker and the bus risers from the circuit breaker to the bus bars is from left to right 1, 2 and 3 or A, B and C. Always remember when the switchgear is viewed at the back the voltage phase rotation is from right to left 1, 2 and 3 or A, B and C. The voltage phase rotation of the bus bars is from the front (toward the gauges and switch controls), 1, 2 and 3 or A, B and C. If the switchgear has a neutral bus, the neutral bus is after phase 3 and the voltage phase rotation from front to the rear is 1, 2, 3 and N or A, B, C and N (Neutral).
BACK COVER REMOVED FROM SWITCHGEAR
A. Bus riser for phase 1. B. Bus riser for phase 2. C. Bus riser for phase 3. N. Neutral bus.Basic Switchgear
The gauges on the upper panel (door) are: A.C. voltmeter (1), A.C. ammeter (3) and frequency meter (2). Voltage adjust rheostat (4) and ammeter-voltmeter switch (5), for the generator set phases, are also on the upper panel. A circuit breaker switch (6) is through an opening in the lower panel. Inside of the cabinet, behind the circuit breaker, are the three current transformers (8), two potential transformers (7), fuses (9) and a terminal strip.
SWITCHGEAR UPPER PANEL (DOOR)
1. A.C. Voltmeter. 2. Frequency meter. 3. A.C. Ammeter. 4. Voltage adjust rheostat (control). 5. Ammeter-voltmeter switch (position for each generator base).
UPPER PANEL (BACK SIDE)
1. Voltmeter. 2. Frequency meter. 3. Ammeter. 4. Voltage level rheostat. 5. Ammeter and voltmeter switch.The voltmeter (1) is the visual indication of the voltage in one phase of the electrical system from the generator set when it is in operation. The ammeter (3) is a visual indication of the current (load) in one phase of the electric system from the generator when the generator set is in operation and the circuit breaker, on the switchgear, is closed.The positions OFF, 1, 2, and 3 of ammeter-voltmeter switch (5) are to connect the voltmeter and ammeter to the phase, of the electric system, in