1, direct electrocution: single-phase electrocution in special circumstances: in the high-voltage ungrounded grid, capacitance C becomes larger, XC capacitance resistance decreases, Z decreases, through the human body capacitance current Ib becomes larger, will jeopardize the safety of the person. Two-phase electrocution of the human body at the same time touching the electrified equipment or lines in the two-phase conductor and the occurrence of electrocution mode, the human body resistance of 1700 ohms.
2, indirect electric shock: the current through the grounding body or conductor landing point was hemispherical to the ground in the dispersion. The closer the current is to the point of entry, the higher the potential; the farther the current is from the point of entry, the lower the potential. In leaving the current inflow point 20m away from the place, the potential is close to 0,8 ~ 10m do not enter.
3, step voltage and step voltage electrocution: electrical lines or equipment ground faults, in the grounding current into the location of the potential distribution area around the person walking, its two feet at different potentials, the potential difference between the two feet is called step voltage. The human body from the current into the location of the closer, the higher the step voltage.
4, contact voltage electrocution: electrical equipment due to insulation damage or other causes of ground faults, such as two parts of the human body (hands and feet) while in contact with the equipment shell and the ground, the two parts of the human body will be at different potentials, the potential difference is the contact voltage. Contact voltage caused by the electric shock accident is called contact voltage electric shock.
5, induced voltage electrocution: refers to when a person touches the equipment and lines with induced voltage caused by electrocution. Some lines are not charged due to atmospheric changes (such as lightning activity), will produce induced charge, after the blackout of some of the possible induced voltage of the equipment and lines if not grounded in time, these equipment and lines to the ground there are induced voltage.
6, residual charge electrocution: refers to when the human body touches the equipment with a residual charge, the human body discharge caused by electrocution. Equipment with residual charge usually contains energy storage components, such as shunt capacitors, power cables, power transformers and high-capacity motors, etc., in the withdrawal of the operation and its similar shaking table measurements and other overhaul, will take the residual charge, so it should be discharged in a timely manner.