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CONTROL PANEL SULZER APC 1/2B
USER GUIDE
Rev.13 (2018/08/30)
TEMPERATURE ELECTRODES IN PUMP FOR MONITORING
Some pumps have thermal sensors in areas with higher warming trend, as the motor winding and the
upper and lower bearings. As standard the APC box 1/2B is ready to receive a temperature signal for
pump bimetal type (in case of PTC or PT100 should add a module temperature monitoring CA442
optional). For adequate protection and monitoring, these sensors must be properly connected to the
box. If pump heating thermistor is activated bimetallic APC box stops the pump instant both manually,
or semi-automatic through the control line of the picture; alarm indicating the PC 242 via the text alarm
"High temperature pump Bn" and is marked by floating contact general fault, plus alternating activated
PC 242 from pump failure launching the next bomb touched by alternating cycle. Any APC considers
that after a pump stop alarm temperature sensor, usually the pump will cool faster because it has
stopped and is submerged, so keep it locked up driver alarm reset, after which the reenters pump
service.
Be sure to connect the terminals shorted box for connection of the temperature sensor
for each pump or auxiliary equipment that does not have such a signal, otherwise controller will
never start the pump.
MCB AND EARTH PROTECTION SWITCH FOR EACH POWER OUTPUT TO PUMP
A picture APC protects each motor output through a curved magnetic protection switch motor (with
adjustable sensitivity thermal trip) and a differential protection switch for industrial (300mA sensitivity
and instantaneous trip).
Instead of using general differential protection frame header, used motor output protection to ensure
the availability of pumps in pumping, since in case of tripping earth leakage current in a pump or the
feed cable, or against nuisance tripping on start, would act only protecting the pump leaving the rest
available (thus differential protection is especially important in pumping rainwater).
Fully finished in APCs, is connected to a digital input signal PC 242 combined for each set of magneto-
differential switches so that in case of fire, the controller instructed with the text "pump motor Prot Bn
Shot" and signalled by potential free contact general fault. From the alarm was raised, the pump is de-
energized it, stop giving PC 242 running order and cut his line of command in the box, but not locked,
so that once manually reset the pump protection come back into service even if not reset the alarm,
should be so has acted on the protection manually, plus alternating activated PC 242 from pump
failure.
MOTOR CURRENT CONSUMPTION
We monitor motor current consumption of each pump in an APC Fully finished using a current
transformer as special (with type 4-20mA output) per pump connected to the PC for 242 analogue input
(or signal control equipment when motor soft starters or variable frequency). This allows us to generate
alarms for both high consumption value as reduced respectively marked as "High consumption Bn
pump" and "Reduced consumption Bn bomb" on the display of PC 242, and in both cases by floating
contact failure overall picture. This alarm does not cause stopping of the pump, so it can be used as a
method to detect a possible shot at the time of the circuit breaker for pump power curve that has the
APC box, so this should be set to alarm activated before the trigger point at which the circuit breaker is
set.
