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| Illustration 1 | g00987961 |
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| Illustration 2 | g00988035 |
This manual covers the LSA generator which is used with the C2.2 engine. This is a 12-wire generator with a 2/3 pitch. The generator has Class H insulation. The generator has a field shunt excitation system that can be self-excited or the excitation system can be powered by auxiliary windings.
For self-excited operation, the generator uses the R 230 automatic voltage regulator. For the auxiliary powered excitation system, the generator uses the R 438 automatic voltage regulator.
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| Illustration 3 | g00988511 |
The R 230 Voltage Regulator (1) Voltage sensing connections (2) Exciter field connections (3) Slow-blow fuse, 250 V, 8 A (4) Voltage adjustment (5) Stability adjustment (6) Underspeed adjustment (7) "ST4" jumper connection (8) "ST3" jumper connection | |
The R 230 voltage regulator is used for the self-excited excitation system. There are three adjustment potentiometers: voltage (4), stability (5) and underspeed (6) .
The "ST4" jumper connection (7) is used for a remote potentiometer for voltage adjustment. In order to add a remote potentiometer for voltage adjustment, remove the jumper and connect the potentiometer to the terminals. The "ST3" jumper connection (8) is used to change the frequency of the generator. For 50 Hz operation, the jumper should be in place. For 60 Hz operation, the jumper should be removed.
The R 230 voltage regulator has the following specifications:
- ±0.5% Voltage regulation
- Range of voltage detection from 85 to 139 V
- Rapid response time of 500 ms for a transient voltage variation amplitude of ±20%
- The power supply is protected by an 8 A fuse.
- 50 or 60 Hz operation
- A potentiometer can be installed for a remote voltage adjustment. The potentiometer should be 1000 Ohms, 0.5 W, with an adjustment range of ±5%
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| Illustration 4 | g00988534 |
The R 230 Voltage Regulator (1) "ST3" jumper connection (2) "ST5" Load adjustment module jumper connection (3) Fast-blow fuse, 250 V, 8 A (4) Excitation ceiling adjustment (5) Underspeed adjustment (6) Response time jumper (7) Stability adjustment (8) Voltage adjustment (9) Phase detection jumper (10) R731 connection terminal (11) "ST4" jumper connection (12) Current transformer connection (13) Excitation jumper (14) Quadrature droop adjustment | |
The R438 voltage regulator is used for the auxiliary winding excitation system. There are five adjustment potentiometers: voltage (8), stability (7), underspeed (5), excitation ceiling (4) and quadrature droop (14) .
The "ST4" jumper connection (11) is used for a remote voltage adjustment potentiometer. In order to add a potentiometer for remote voltage, remove the jumper and connect the potentiometer to the terminals. The "ST3" jumper connection (1) is used to change the frequency of the generator. For 50 Hz operation, the jumper should be connected to the two terminals on the left side of the illustration. For 60 Hz operation, the jumper should be connected to the two terminals on the right side of the illustration.
The R438 voltage regulator has the following specifications:
- ±0.5% Voltage regulation
- Voltage detection range of 95 to 140V on the 110V terminals, 170 to 260V on the 220V terminals, and 340 to 520V on the 380V terminals
- Rapid response time or Normal response time
- The power supply is protected by an 8A fuse.
- 50 or 60 Hz operation
- A potentiometer can be installed for a remote voltage adjustment. The potentiometer should be 1000 Ohms, 0.5 W, with an adjustment range of ±5%
The Load Adjustment Module (LAM) is integrated into the R438 voltage regulator. When a load is put on the generator, the engine speed of the generator set will decrease. When the engine speed goes below the preset frequency threshold, the LAM will cause the voltage to drop by 15%. The amount of load that is applied will drop by 25% until the rated engine speed is reached. In order to avoid an unstable condition, the trip threshold should be set in a steady state at approximately 2 Hz below the lowest frequency.