7.1.2. Safety locks
Safety locks serve to interrupt a chain when the current will exceed a certain value, and to protect elements and wires which can be damaged by too strong current. The sharp increase in a current is usually caused by malfunction in a chain, more often short circuit. The block of safety locks is located under the dashboard from the driver.
Each of safety locks protects the chain, its belonging to this or that chain is designated on a cover of the block of safety locks.
|Fig. 7.2. Example of serviceable and faulty safety locks
In the block of safety locks safety locks of the knife type which color corresponds to a current of protection of a safety lock are established. In case of an exit of any element of electric equipment out of operation, first of all, it is necessary to check a safety lock condition. Serviceability of a safety lock is determined by presence of the wire conductor connecting contacts of a safety lock (fig. 7.2)
|Fig. 7.3. Special tweezers for extraction of safety locks
For replacement of the failed safety lock previously switch off the corresponding electric chain, take a safety lock from a nest tweezers (fig. 7.3)
If again established safety lock instantly fails when giving tension, check a protected electric chain. If the safety lock protects some chains, they are necessary for connecting serially that on peregoraniye of a safety lock to define a faulty chain.
The heater and the conditioner consume a big current therefore the block of safety locks has the switch for protection of their chains. If the chain is disconnected by the switch, switch off a heater and the conditioner before pressing the button of repeated turning on of the switch.