tudies have shown that electric injury to the human body mainly comes from electric current, causing fatal injury and death when the electric shock, electric shock refers to the current flowing through the human body caused by internal organs damage, which is the most serious consequences of electric shock, the vast majority of electric shock death Accidents are caused by electric shock
To prevent similar incidents, fountain design, installation should pay special attention to the following aspects:
一、 Fountain pool electrical equipment installation
1, the use of extra-low voltage (SELV) power supply in the pool area using isolation transformer power supply;
3, in the case of personnel and animals exposed to water, the use of low-voltage electromagnetic valve 36V power supply;
4, the pump used should be consistent with the provisions of existing national standards;
5, underwater cables should comply with the provisions of the existing national standards of the cable; must be fixed, for cable insulation hidden position must be well protected;
6, leakage protection, electrical insulation strength, motor insulation resistance of the pump to be regularly checked, frequency: 1 times / month, in addition, for maintenance must be carried out above the test;
7, in direct contact with the crowd, not under water, must install leakage protection circuit, and to take isolation measures around and set warning signs;
二、Water fountain equipotential bonding
1, the total equipotential bonding: Spray pools should be combined with the overall formation of the total equipotential bonding.
2, auxiliary equipotential bonding: all devices in the region outside the conductive part, with equipotential bonding wire connection.
3, in the fountain around the ground without reinforcement, it should be laid potential equalization wire.
4, equipotential cable and (grounding) protection wire should be used lap welding steel material connection.
5, Concealed Potential bonding wire and its connection, electrical construction personnel should do hidden inspection records and test reports.
三、 Fountain pool cable selection
Cable selection and laying, cable insulation, cable section selection, cable, control, signal, measurement, network cable, computer system control cable should meet the requirements of the current national standards.
四、 Submersible pump safety precautions
1, according to the safety of electricity regulations, pumps must be grounded before use.
2, electric pump work, no person shall enter the water near it, in case of electric pump failure occurred when the electric shock accident.
3, check, move or disassembly pump must first cut off the power.
4, mobile pump, it is strictly prohibited pulling the cable, the cable should be checked when found damaged and should immediately replace the new cable before use.
6, all pump must be equipped with control switch, pump overload, it should be reliable operation.
