IV. Installation & Use and Matters Needing Attention
1. Electric pumps shall be comprehensively checked for damage during transportation
and storage prior to installation and use, e.g. whether cable is in good condition, and in
case of any damage, replacement or repair shall be made by professionals prior to use.
2. Before operation, electric pumps shall be checked for whether the insulation
resistance meets the requirements of relevant standards, and whether the cold insulation
resistance is greater than 50MΩ (megohm).
Check whether the cold insulation
resistance is greater than 50MΩ (megohm)
3. At wiring, electric pumps should be correctly installed with electrical leakage
protector, and a yellow-green wire attached with earthing mark in the outgoing cable of
electric pump shall be earthed reliably. For electric pumps provided with plug at delivery,
the matched patch board must be reliably earthed. Matched overload protection devices
shall be selected by current or power for all electric pumps. The wiring of electric pumps
can be carried out according to the figure below.
Input
Output
Fuse
AC 380V
Yellow-green wire
Pump
Wiring gram of protection device
4. Electric pumps shall be subjected to test run for no more than 10s before immersion
into water, and it shall be checked whether the direction of rotation of electric pump is
consistent with the indication arrow; if it's found a three-phase electric pump reserves, any
two of the three phases should be exchanged with each other.
