Switching Board for 2 Electropumps

Quadro de Alternância

Command and protection with alternation of 2 electric pumps.

Apresentação

- Plastic box 300x250x140 mm in gray ABS RAL7035 with hinge and transparent polycarbonate cover.
- Danfoss / WEG contactors and thermal relays.
- Toggle relay for toggle and simultaneity command.
- Automatic (AUT), manual (I) or off (0) operation, independently controlled by each pump using a 3-position switch with protective cap.
- Connection with reduced voltage (12V) for remote control of engine start/stop (pressure switch, float or other).
- Connection with reduced voltage (12V) for remote safety command (C11-C12) (pressure switch, float or other).
- Protection of the command circuit through a circuit breaker.
- Protection of the power circuit against short circuits through a circuit breaker.
- Protection of the power circuit against overloads through thermal relay.
- Indication of phase presence in the control circuit (yellow indicator).
- Individual indication of engine on (green lights).
- Individual indication of thermal trip (red flags).
- 6 cable glands, for passing the connection cables.

Como Funciona

Once all the connections have been made correctly, the thermal relays must be adjusted according to the rated currents of the motors. The panel must have all signals turned off, except for the presence of the command circuit phase.

With the switches in position (AUT), whenever the start command of the 1st pump (C31-C32) closes, one of the pumps will be turned on alternately. If the 2nd pump start command (C41-C42) closes, the 2 pumps will start operating simultaneously. If this command reopens, it will turn off the pump that has been running the longest.

Opening the safety command (C11-C12) switches off the pumps, regardless of the indications of the start/stop commands and switches (if in automatic mode). If you do not intend to use the safety command, it must be closed using a "shunt".

With the control circuit switch in position (I), the corresponding pump turns on, regardless of the status of the start/stop and safety commands.

The triggering of any of the thermal relays due to overload (red lights), causes the corresponding pump to remain off regardless of the indications of any of the commands.

Technical description