Leakage protection device for mobile power generators
A leakage protection device and generator technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of unusable zero-connection protection, unusable grounding protection, etc., to achieve reliable leakage monitoring and protection, rapid response and quick response, The effect of expanding the scope of application
Active Publication Date: 2014-01-22
BC P INC CHINA NAT PETROLEUM CORP +2
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AI Technical Summary
Problems solved by technology
This kind of equipment can neither use grounding protection nor zero connection protection. How to solve its leakage protection? That's exactly what we're trying to solve
Method used
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Effect test
Embodiment
[0022] Embodiment. This example is an experimental prototype, is to try out in the 120PFX single-phase generator set that North China Diesel Engine Works produces, and its composition is as follows Figure 1-Figure 3 shown.
[0023] Connect the Z1 variable impedance circuit and the Z2 variable impedance circuit in series between the voltage output terminal equipotential body A and the equipotential body N of the single-phase generator and its control circuit, and connect the leakage signal between the Z1 variable impedance circuit and the Z2 variable impedance circuit The input of the collection and execution circuit, and the output of the leakage signal collection and execution circuit is connected to the shell of the single-phase power generation equipment. The potential of the contact 0 connected to the leakage signal acquisition and execution circuit between the two variable impedance circuits is zero or close to zero.
[0024] Electrical principles such as figure 2 sho...
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The invention is a leakage protection device for mobile power generators and relates to the technical field of electrical variable measurement and emergency protection devices. The leakage protection device for mobile power generators comprises a single-phase power generator and a control circuit thereof, variable-impedance circuits and a leakage signal acquisition and execution circuit. The Z1 variable-impedance circuit and the Z2 variable-impedance circuit are connected in series between an equipotential body A and an equipotential body N at a voltage output end of the single-phase power generator and the control circuit thereof, the input of the leakage signal acquisition and execution circuit is connected between the Z1 variable-impedance circuit and the Z2 variable-impedance circuit, and the output of the leakage signal acquisition and execution circuit is connected with a shell of single-phase power generation equipment. According to the invention, leakage monitoring of power generation equipment can be realized without externally connecting a ground wire or a neutral wire, and the device is safe and reliable and can react quickly.
Description
technical field [0001] The invention is a leakage protection device for a single-phase mobile generator, which relates to the technical field of measuring electric variables and emergency protection devices. Background technique [0002] According to the requirements of power supply regulations, the exposed metal parts of electrical equipment must be reliably grounded to prevent machine damage and personal injury accidents caused by equipment leakage. This is the most basic leakage protection measure for electrical equipment to use electricity safely. [0003] Leakage protection must have a special metal wire to realize small resistance contact between electrical equipment and the earth, or use a special metal wire to connect electrical equipment with the zero potential point of the power supply system, so leakage protection is also called grounding protection or zero protection. [0004] In the field construction of oil and gas pipelines, three-phase diesel power generati...
Claims
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IPC IPC(8): H02H7/06
Inventor 王林章廖宇平孙福全龚汉波赵爽武淑倩
Owner BC P INC CHINA NAT PETROLEUM CORP