How Do I Convert My Auto From 6 Volt System to 12 Volt?

Popular interpretation of nounsVoltage paralleling: for sectional wiring of single bus, when the PT of section I bus stops and the line of this bus continues to work, and the secondary voltage needs to be measured and protected, the voltage paralleling device is put into operation to provide the secondary voltage of section II bus to the protection and metering device on section I bus (previously, the primary voltage is in parallel).For double bus connection, similarly, when the Pt on the #1 bus stops, the secondary voltage of the Pt on the #2 bus can also be provided to the protection and metering device of the line on the #1 bus through voltage parallel.Voltage switching: in case of double bus connection, #1 and #2 buses operate separately. On which bus a line runs, the voltage of which bus PT is used for the second time. When the operator switches the primary disconnector, the secondary voltage shall also be able to switch automatically.Voltage parallel circuit01principleTaking 10kV single bus section as an example, the following figure is the primary main wiring diagram.The 10KV voltage parallel circuit of a voltage parallel device is analyzed below.When the two sections of bus operate separately, the section circuit breaker 3Qf is in the off position, and the primary operation and the secondary operation are also operated separately;If the PT of bus I needs to be shut down and the line on bus I still needs to continue to operate normally, we can close the section breaker 3Qf to make the primary bus in parallel operation. At this time, turn the voltage parallel handle to the parallel position, and the relays J4, J5 and J6 in the automatic parallel circuit are charged. The normally open contacts of J4 and J5 are closed, and the secondary voltage of the two sections of bus is parallel in the voltage parallel device, At this time, the voltage (protection and metering) on the small bus on the top of the 10kV High voltage room is the secondary voltage of the II bus Pt.02Juxtaposition and splitting logicIt can be seen from the automatic parallel circuit that when #1pt and #2pt are only one Pt in the working position and the other Pt in the non working position, the automatic parallel circuit can have the necessary conditions for conduction. When two PTS are in the working position at the same time, the automatic parallel circuit is disconnected and the voltage parallel cannot be completed.Let's look at another voltage parallel circuit:If the parallel logic needs to be completed, the normally open contacts of the collected section switch position (DL), section handbrake position (S9) and section isolated handbrake position (3s9) need to be connected in series, and then connected to the voltage parallel device. Parallel can be allowed only when the above three are closed at the same time.If the parallel handle (7qk) is set to the parallel position at this time, 1-2 contacts are connected, the parallel relays 3yqj1, 3yqj2 and 3yqj3 are powered on, and the corresponding contacts are closed to complete the parallel operation of two sections of buses.If splitting is required, it is necessary to connect another pair of normally closed contacts of section switch position (DL), section handbrake position (S9), section isolation handbrake position (3s9) and splitting contacts 3-4 of parallel handle (7qk) in parallel. When any pair of contacts are closed, splitting is completed.For the single bus section wiring mode, voltage paralleling requires that the section switches of bus I and bus II and the knife switches on both sides must be closed.Voltage switching circuitTake the voltage switching circuit of czx-12r operation box as an example:1yqj1 3 and 2yqj1 3 are voltage relays, 1yqj4 7 and 2yqj4 7 are two position relays. When a line is hung on I bus, the normally open contact of I bus disconnector is closed and the normally closed contact is disconnected, so that 1yqj6 7 relay is charged, and the voltage collected by the protection device is I bus voltage; When the line changes from bus I operation to bus II operation, bus I knife switch is disconnected, its normally closed contact is closed, and 1yqj6 7 double position relay returns; The normally open contact of II bus disconnector is closed to energize 2yqj6 7 relay, so that the voltage collected by the protection device is II bus voltage.02Two position relayThe dual position relay is used to ensure that the voltage switching circuit can still provide the normal bus voltage before power failure to the protection device when the auxiliary contact circuit of the knife switch is powered down.The problem caused by the two position relay is: when the bus switching operation separates the knife switch, if the normally closed contact and circuit of the knife switch are abnormal, the original acting two position relay cannot return, then although the primary equipment has separated from the original bus, the secondary voltage switching main circuit still switches the secondary voltage of the bus to the protection device, And in parallel with the secondary voltage of another section of bus. If it is not found in time, the abnormal paralleling of bus secondary voltage will occur when the bus is separated, which may burn the weak nodes on the voltage switching main circuit and cause abnormal voltage circuit (PT disconnection).Therefore, there is such an alarm signal: "the voltage switching relay acts at the same time". When the two switching relays act at the same time, their normally open contacts are connected at the same time (in series) to send an alarm signal, indicating that the auxiliary contact and circuit of the knife switch are in an abnormal state, and inform the operation and maintenance personnel of the hidden danger.