English (GB)
8
Protection against electric shock, indirect contact
Protection against short circuit, fuses
CUE and the supply system must be protected against short
circuit.
Grundfos demands that the backup fuses mentioned in section
Cable cross-section to signal terminals
against short circuit.
CUE offers complete short-circuit protection in case of a short
circuit on the motor output.
Additional protection
If CUE is connected to an electrical installation where an earth
leakage circuit breaker (ELCB/RCD) is used as additional
protection, the circuit breaker must be of a type marked with the
following symbols:
The circuit breaker is type B.
The total leakage current of all the electrical equipment in the
installation must be taken into account.
The leakage current of CUE in normal operation can be seen in
the CUE installation and operating instructions.
During startup and in asymmetrical supply systems, the leakage
current can be higher than normal and may cause the ELCB/RCD
to trip.
EMC-correct installation
Fig. 3
QR code to TPE Series 1000, TPE Series 2000
installation and operating instructions
Mains and motor connection
Wiring diagram
Fig. 4
Wiring diagram, three-phase mains connection
Mains connection
1. Connect the earth conductor to terminal 95 (PE).
2. Connect the mains conductors to terminals 91 (L1), 92 (L2),
93 (L3).
3. Fix the mains cable with a cable clamp.
Motor connection, enclosures
1. Connect the earth conductor to terminal 99 (PE).
2. Connect the motor conductors to terminals 96 (U), 97 (V), 98
(W) of the motor plug.
3. Fix the screened cable with a cable clamp.
CAUTION
Electric shock
Minor or moderate personal injury
- CUE must be earthed correctly
and protected against indirect
contact according to local
regulations.
The leakage current to protective
earth exceeds 3.5 mA, and a
reinforced earth connection is
required.
WARNING
Electric shock
Death or serious personal injury
- The leakage current to protective
earth exceeds 3.5 mA.
The motor cable must be screened
for CUE to meet EMC
requirements.
ELCB/RCD
net.grundfos.com/qr/i/99457466
Check that the mains voltage and
frequency correspond to the values
on the nameplate of CUE and the
motor.
The motor cable must be screened
for CUE to meet EMC
requirements.
T
M
03
87
99
25
07
Terminal
Function
91
(L1)
Three-phase mains supply
92
(L2)
93
(L3)
95/99
(PE)
Earth connection
96
(U)
Three-phase motor connection, 0-100 % of
mains voltage
97
(V)
98
(W)
Enclosure
Torque Nm [ft (lb)]
Mains
Motor
Protective
earth
Relay
B2
4.5 (3.3)
4.5 (3.3)
3 (2.2)
0.6 (0.4)
C1
10 (7.4)
10 (7.4)
3 (2.2)
0.6 (0.4)
Safety instruction.book Page 8 Sunday, April 25, 2021 5:22 AM
