Sable car GAZ-2752, 2217, 2310>> Electric equipment>> Check of electric chains>> Check of electric chains energized

Check of electric chains energized


Chains energized we check the voltmeter and the ampermeter.
The voltmeter is connected parallel to the checked device or a chain site. A limit of measurements 0–15 or 0–25 In a direct current. A negative wire (щуп) we connect to "weight", positive – with consumers or current sources. It is possible to determine malfunction of a feeding chain by power failure (break, oxidation of contacts, etc.), and also short circuit in the consumer.
For check of chains energized it is possible to use a control lamp in capacity no more than 3-4 W, calculated on tension 12 In (for example, lamp AMH12-3 used in a combination of devices).
The ampermeter should have the top limit of measurements not less than 10 And a direct current, and also protection against an overload. The ampermeter is connected consistently to the checked device. "Plus" of the device "minus" – to "plus" of the consumer is connected to a current source, and. We measure a consumed current and we compare it with nominal, specified in a technical characteristics of the checked device. As the actual tension in an onboard network differs from nominal (in help data the rated current corresponds to rated voltage, i.e. 12 In), the received value can slightly differ from the specified. If a current less demanded, the electric chain and if more – there was a short circuit in the consumer is faulty.