EFFECTS OF CURRENT ON HUMAN BEINGS AND LIVESTOCK - PART 3: EFFECTS OF CURRENTS PASSING THROUGH THE BODY OF LIVESTOCK
International Electrotechnical Committee
FOREWORD
INTRODUCTION
1 General
1.1 Scope
1.2 General remarks
1.3 Normative references
1.4 Definitions
2 Characteristics of the impedance of the body of
livestock
2.1 Internal impedance of animals (Zi)
2.2 Impedance of the hide and skin (Zp)
2.3 Impedance (resistance) of the hoof (Zh, Rh)
2.4 Total body impedance (ZT)
2.5 Initial body resistance (Ro)
3 Values of the total body impedance (ZT)
4 Values of the initial resistance of the body (Ro)
5 Effects of livestock of sinusoidal alternating
current in the range from 15 Hz to 100 Hz
5.1 Threshold of reaction
5.2 Threshold of immobilization
5.3 Threshold of ventricular fibrillation
Bibliography
Figure 1 - Current flow and impedances of the relevant
parts of the body of a cow for current path from
the nose to the legs
Figure 2 - Diagrams for an animal, for a current path from
the nose to the four legs (path A) and from the
forelegs to the hindleys (path B)
Figure 3 - Diagram for the total body impedance for cattle
for a percentage of 5 % of the population
Figure 4 - Ventricular fibrillation for sheep
Figure 5 - Minimum fibrillating currents of sheep as a
function of weight for a shock duration of 3 s
Figure 6 - Minimum fibrillating currents (average) of
various species of livestock as a function of
weight for a shock duration of 3 s
Table 1 - Impedance (resistance) of the hooves of cattle
(Zh, Rh) for a.c. voltages up to 230 V, 50/60 Hz
Table 2 - Total body impedances ZT for a.c. 50/60 Hz for
cattle for touch voltages up to 230 V
Table 3 - Initial body resistance Ro for cattle
Table 4 - Threshold of ventricular fibrillation for a.c.
50/60 Hz for different species of livestock, for
a shock duration of 3 s
Defines values for the electrical impedance of the body of livestock as a function of the touch voltage, the degree of moisture of the hide or skin and the current path. At this time values are only available for cattle. Describes the effects of sinusoidal alternating current within the frequency range from 15 Hz to 100 Hz passing through the body of livestock.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 64 |
