General information:

The voltage regulator JA120M is purposed for voltage maintenance of the onboard vehicle network of the tractor in predetermined limits in all system operation modes of electrical equipment at change of the rotation frequence of the alternator rotor, electrical load and environment temperature.

The regulator is produced in a single climatic design О2.1 in accordance with GOST 15150 for internal market and for export. On extent of protection against penetration of foreign bodies and water, the item meets design IP68 in accordance with GOST 14254. Against moisture penetration the regulator is protected by special high-heat-conducting compound with an operating temperature up to 200 °С. Serviceability and correspondence of item parameters are saved even at plunging of the regulator to water under condition of protection of demountable joints. The regulator JA112М is designed on a single-wire power circuit; the item housing is connected to the vehicle housing. An operating mode of the regulator is S1 in accordance with GOST 3940.

Applicability: automobiles MAZ, KAMAZ with the alternator G273 and others.

The regulator is mounted in the brush unit of the alternator where the setting of regulators JA120M or JA120M1 with the help of standard screws is stipulated.

Specifications:

Range of operating temperatures, °С -40 .. +85   Nominal regulating voltage, V 28,0   Regulating voltage with battery at t°=(25 ± 2) °С and load of alternator 3А, V:   - mode "Winter" 28,0 ± 0,3   - mode "Summer" 27,6 ± 0,2   Maximum current of output circuit, А 5,0   Thermal compensation of regulating voltage, mV/°С -6,0 ± 3,0   Residual voltage on output "Ш", not more, V 1,0   - typical, V 0,75   Maximum allowable long-term influence of increased supply voltage, V 36,0   Maximum allowable influence of increased supply voltage up to 5 min., V 50,0   Maximum allowable pulse overvoltages in accordance with GOST 28751, V 120,0

Connection diagram:

Dimensional drawing: