5.4.1.5 Motor temperature
DANGER
Insufficient cooling
Explosion hazard!
Winding damage!
▷
Never operate an explosion-proof pump set without operational temperature
monitoring.
Standard pump sets (variants UL and WL):
Two bimetal switches (terminals 21 and 22, max. 250 V~/2 A) serve as temperature
control devices which open when the winding temperature is too high.
Opening of the switch contacts must result in the pump set cutting out. Automatic
re-start is permissible.
WARNING
Incorrect electrical connection
Electric shock!
▷
Adequately insulate conductor 20.
Conductor 20 has no function on standard pump sets.
However, it can be live and must, therefore, be insulated or connected to a dummy
terminal.
Explosion-proof pump sets (variant YL)
Explosion-proof pump sets are equipped with double monitoring of the winding
temperature. Two bimetal switches (terminals 20 and 21, max. 250 V~/2 A) serve as
temperature control devices which open when the winding temperature is too high.
Opening of the switch contacts must result in the pump set cutting out. Automatic
re-start is permissible.
Two additional bimetal switches (terminals 21 and 22, max. 250 V~/2 A) serve as
temperature limiters which open when the temperature limit is exceeded.
Opening of the switch contacts must result in the pump set cutting out. The pump set
must not re-start automatically.
5.4.1.6 Leakage inside the motor (optional)
PE
K 1
9
81-56
B2
Connecting the electrode relay
Position of the electrode in the motor housing
An electrode fitted inside the motor monitors the winding and connection space for
leakage. This electrode must be connected to an electrode relay (conductor marked
9). Tripping of the electrode relay must result in the pump set cutting out.
5 Installation at Site
Amarex® N
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Goodnal STP ST041 Biological Treatment (KSB WAS PUMP 1 & 2 PU-0530-010 OM Instructions) Vendor Manual
Q-Pulse Id VM381
Active 29/10/2013
Page 31 of 76
