6
3. Electric
part
Warning! Access to electric components is allowed only to skilled specialists. Non-authorized works in the distribution box are strictly forbidden. After each maintenance or repair of the device, it is neces-
sary to inspect safety according to VDE0701. In particular, it is necessary to test the resistance of the potential-equalization wire (<0.3
Ω
), insulation resistance (> 2 M
Ω
), and appropriate operation of avai-
lable protective devices.
4.
Electric connection and safety measures
The plant in the delivery condition is intended for the supply of one consumer (IT circuit). The neutral wire is connected neither to the case nor to a protective wire. The only consumer is connected exclusive-
ly through the sockets on the electric plant. If extension cords are used, the total resistance should be no more than 1.5
Ω
. Accordingly, the maximum length of an extension cord with a section of 1.6, 2.5,
and 4.0 mm2 is equal to 60, 100, and 165 m, respectively. If extension cords are connected to more than one socket, the corresponding length should be halved. Wires no worse than H07RN-F according
to DIN VDE57282-810 must be used for portable extension cords. If the electric plant is planned to apply with another-type circuit, it is necessary to adapt protective measures. These works, as well as
manipulations with the distribution box of the electric plant, can be executed only by skilled electricians. They are responsible for the efficiency of safety measures. In addition, it is necessary to follow local
instructions. If necessary, the authorization of a local power-supplying enterprise should be received.
4.2 Protection touch voltage (DIN VDE 0100, T551)
The safety measure called «Protective separation with equalization of potentials» is conveniently carried out. The phase and neutral wires should not be grounded and should not be connected to the protective
wire and potential-equalization wire (PE). The potential-equalization wire should be laid continuously (generator-wiring-consumer). For the removal of static charges, grounding the case is allowed. If the electric
plant should feed an existing circuit with a grounded neutral (TN circuit), protection measures for this circuit must operate or new effective protection measures should be developed. If the required short circuit
current of the generator is insufficient for the circuit breaker of an available consumer or the wire resistance is more than 1.5 M
Ω
, it is necessary to provide protection measures (e.g., a protective circuit brea-
ker) independent of the operation current and conductor length. If the electric plant with the protective circuit breaker is intended for application in TN circuits, it is necessary to keep the maximum allowable
grounding resistance corresponding to the chosen protection measure. The executive should be an electrician. Each protective action should be checked by the electrician when commissioning.
4.3 Thermal protection means
The electric plant is equipped with a device for the control of winding temperature. When winding temperature exceeds a preset value, ignition is disconnected and the engine stops. The repeated start of
the engine is possible only after cooling the winding. Before repeated start, it is necessary to remove causes of overheating (e.g., to clean the polluted cooling edges or ventilating casings, to be convinced
of the absence of overload caused by too powerful consumers, to not apply the electric plant at too high ambient temperature).
5.
Kinds of installations
5.1 Installation at an open place
Whenever possible, the electric plant should be applied outside buildings. In this case, the best supply and removal of air are provided. An area where obstacles are absent in a radius of 5 m is ideal for
placing the electric plant. This area should be free of combustible or explosive materials such as fuel, etc. The plant should be placed horizontally on the ground; the maximum allowable inclination is equal
to 35°. It is necessary to protect the electric plant from the action of direct solar beams by a shed if it does not affect the quality of air circulation.
5.2
Stationary installation in closed buildings
When the electric plant is applied in closed buildings, various supervising documents must be taken into account:
* Building norms and rules of German States
* Instructions of the Ministries of German States
* DIN 18600 «Instructions on construction and operation of public buildings»
* Regional TÜV instructions
* Instructions on the application of building norms and rules of German States
* Rules of manipulation with combustible liquids
* Instructions of power-supplying enterprises
* Instructions on operation of garages
* VDE 0100 and VDE 0108 instructions «Electrical installations in public buildings»
Summary of Contents for 4401 E -AA/HEBA
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