- Motor shaft should be rotated by hand before making electrical conditions to control
whether it rotates easily.
- It is recommended to use PTC(Passive Thermal Control-Thermistor) in motors.
However usage of those depends on customer. If PTC is used ends of those should
be connected to motor terminal box and later should be connected to PTC control
device in motor control panel.
- Electrical motors should be protected against overloading by circuit breakers and/or
fuses. Circuit breakers and/or fuses should be selected with respect to full load
values those are written in nameplate on motor.
- Compare and control voltage, ampere and frequency values which are given in
motor nameplate with line values.
- Motor connection scheme can be found in motor terminal box or in handbook.
- Motor electrical connections should be done according to local Electrical
Regulations and grounding connection should absolutely be done.
- Protection class of motor body and control system cases in pump should be at least
EN 60029 IP 22. In addition to this, protection class of motor bodies and control
systems in pump group should be determined according to operational and
environmental conditions.
- Safety precautions which are determined in "Safety Instructions" should be applied.
All power connections should be disconnected before starting to any work.
- Motor connection type changes according to motor mains power and connection
type. Necessary connection types of jumpers in terminal box are displayed in Table 1
and Scheme 1a-1b and 1c
Table 1
13
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