Fig. 7-10. Voltage regulator PP-380: 1 - protective plate; 2 - additional resistor, 3 - lower gasket with sockets of plugs "15" and "67"; 4 - cover gasket; 5 - throttle; 6 - strut mounting nut; 7 - lower contact stand; 8 - Upper contact post; 9 - regulator winding; 10 - armature, 11 - armature spring; 12 - spring bracket; 13 - yoke; 14 - base
Fig. 7-11. Electrical diagram of the voltage regulator: 1 - throttle; 2 - temperature compensating resistor; 3 - regulator winding; 4 - additional resistors
Warnings
1. Do not mix up the wires connected to the "15" and "67" plugs. If the wires are accidentally mixed up, the regulator will not work and the upper contacts will be permanently closed. The voltage at the generator output will increase significantly, which will lead to violent "boiling" of the battery and damage to consumers. In addition, the contacts will sinter and the voltage regulator will have to be replaced.
2. It is not allowed to connect capacitors against radio interference to the circuit between the plugs "67" of the regulator and the generator. This violates the operating conditions of the contacts and they are quickly damaged.
3. Do not connect additional power consumers to the generator excitation winding power supply circuit, as this will greatly increase the generator voltage.
4. It is not allowed to check the regulator's operability by short-circuiting its plugs "15" and "67". In this case, the generator voltage increases and the rectifier may be damaged.
5. Do not remove the regulator cover unnecessarily, so as not to damage the seal. Moisture and various substances getting under the cover leads to contamination, burning of contacts and disrupts the normal operation of the regulator. For this reason, all materials used in the regulator are tested for the absence of gas emission and when replacing the gasket, a new one must be made only of polyurethane, as provided for by the regulator design.
6. The regulator must be kept clean and protected from accidental impacts that may disrupt its adjustment.
It is necessary to ensure the reliability of the connection of the regulator body to the "ground" through the mounting screws, since a poor connection increases the generator voltage above the norm.