English (US)
30
18. Insulation resistance
19. Emergency operation (only 15 - 30 Hp)
If the pump is stopped and you cannot start the pump
immediately after normal remedies, the reason could be a faulty
frequency converter. If this is the case it is possible to maintain
emergency operation of the pump.
Before change over to emergency operation we recommend you
to:
• check that the power supply is OK
• check that control signals are working (start/stop signals)
• check that all alarms are reset
• make a resistance test on the motor windings (disconnect the
motor leads from the terminal box)
If the pump remains stopped it is possible that the frequency
converter is faulty.
To establish emergency operation proceed as follows:
1. Disconnect the three power supply leads, L1, L2, L3, from the
terminal box, but leave the protective ground lead(s) in
position on the PE terminal(s).
2. Disconnect the motor supply leads, U/W1, V/U1, W/V1, from
the terminal box.
3. Connect the leads as shown in fig. 43.
Fig. 43
How to switch an E-pump from normal operation to
emergency operation
Use the screws from the power supply terminals and the nuts
from the motor terminals.
4. Insulate the three leads from each other by means of
insulating tape or the like.
5. A motor starter is required.
&DXWLRQ
0.5 - 10 Hp
Do not measure the insulation resistance of
motor windings or an installation incorporating
E-pumps using high voltage megging equipment,
as this may damage the built-in electronics.
&DXWLRQ
15 - 30 Hp
Do not measure the insulation resistance of an
installation incorporating E-pumps using high
voltage megging equipment, as this may damage
the built-in electronics.
The motor leads can be disconnected separately
and the insulation resistance of the motor
windings can be tested.
Warning
Never make any connections in the pump
terminal box unless all electric supply circuits
have been switched off for at least 5 minutes.
Note for instance that the signal relay may be
connected to an external supply which is still
connected when the power supply is
disconnected.
TM
03
86
07
20
07
T
M
03
91
20
34
07
TM
04
00
18
48
07
T
M
03
91
21
34
07
TM0
3 912
2
3
40
7
Subject to alterations.
DBP-1 - GRUNDFOS PUMP CRE - 99392005
Summary of Contents for SPKE Series
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