caprari K+ Serie Manual De Uso Y Mantenimiento página 29

ROUGH DIAGRAM OF ELECTRIC PUMP CABLE CONNECTIONS
(∆ connection for direct starting)
L1(u)
L1 (R)
POWE R
L2(v)
SUPPL Y LINE
L2 (S)
L3(w)
L3 (T)
U1
W2
V1
U2
W1
V2
Panel connection
For Y-∆ starting, use the terminals of the electric pump power supply cables according to the indications in the control panel wiring diagrams.
Power cable 1
Auxiliary cable
19. GROUND CONNECTION
The Yellow/Green ground terminals in all electric pump cables must be connected to the grounding circuit of the system before the
other terminals are connected. If the electric pump is disconnected, these must be the last terminals to disconnect.
For flameproof electric pump versions, there is an external supplementary ground terminal installed on the mobile part of the cable
clamp. The installer is responsible for connecting this terminal to the grounding circuit of the system.
20. MOTOR PROTECTOR CONNECTIONS
20.1. ELECTRIC PUMPS WITH THERMAL PROBES
ATTENTION All electric pumps are equipped with thermal probes as standard supply (terminals marked with symbols T1 and T2). It is
obligatory to connect them to a suitable power source cut-out device.
The thermal probes are bimetallic switches normally closed and inserted in the motor windings; when the temperature of 140°C (284°F) is
exceeded, the power supply circuit of the remote control switch coil opens and stops, causing the electric pump to stop.
The coil will be energized again when the probes have cooled (114°C/237°F).
The probes can be connected at a max. voltage value of 250V and have a max. capacity of 1.6A cos
A 24V - 1.5A power supply is recommended.
20.2. ELECTRIC PUMPS WITH CONDUCTIVITY PROBES
ATTENTION
The conductivity probe is inserted in the oil chamber (both for versions-E and for versions -... X ...) and detects any infiltration of
water. If the electric panel is equipped with a conductivity detector, this will activate when the electric resistance is less than 30 kΩ owing
to the presence of water. In order to detect conductivity, the terminal marked "S" and a shunt of the Yellow / Green earth terminal
must be connected to the device.
The conductivity detector is generally used to close an alarm circuit if water is detected in the oil chamber or motor. The alarm circuit can either have
lights and/or be acoustic. For explosion-proof pumps, the specifications of the device must be compatible with the classification of the area liable to
the risk of explosion.
Caprari S.p.A.
K.M150N.. / K.M100N.. / K.W100N.. / K.D200N.. / K.M200P.. / K.D250P..
CONDUCTIVITY
DETECT OR
SAFETY
ISOL ATOR
(R)
L1
(S)
L2
(T)
L3
BLACK
GREY
BROWN
YELLOW / GREEN
BLACK
GREY
BROWN
YELLOW / GREEN
G/V
S
T1
T2
COIL
U1
V1
W1
G/V
U2
V2
W2
G/V
Power cable 2
YELLOW / GREEN
= 0.6.
GB
BLACK
GREY
BROWN
29