Grundfos CU 100 Instrucciones De Operación Y Instalación página 6

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Internal construction
Single-phase
6
1
5
3
Fig. 4
Three-phase
1
2
3
5
Fig. 5
6
7
9
8
4
6
4
The position numbers in the table refer to figs. 4
and 5.
Pos.
Description
1
Starter relay
Motor protection:
Single-phase: Manual resetting, in the
2
cabinet front
Three-phase: Automatic resetting
Terminal block for connection of pump.
Single-phase: Leads marked 1, 2 and 3
3
[1, 2 and 3]
Three-phase: Leads marked 1, 2 and 3
[1, 2 and 3]
Earth bar, lead marked greenish yellow
4
[
]
Terminals for the connection of:
thermal switch(es)*: Leads marked 4, 5
5
and 6 [4 and 6] and
float switch**: Leads marked brown and
black [1 and 2].
Single-phase: Thermal relay
6
Three-phase: Phase sequence indicator
7
Single-phase: Capacitor contact
8
Single-phase: Run capacitor
9
Single-phase: Starting capacitor
The lead markings in [ ] refer to SEG, SE1, SEV, DP
and EF pumps from Grundfos.
*
If the pump has more than one thermal switch,
the switches must be connected in series so that
the lowest switch stops the pump and the highest
one is in reserve.
** The float switch is supplied with the control box
and must be connected to the brown and black
leads (NO contact).

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