Trane TR200 Programming Manual page 18

60 AVM
Switching pattern called 60 Asynchronous Vector Modulation (par.14-00
Power Factor
The power factor is the relation between I 1 and
I RMS .
The power factor for 3-phase control:
The power factor indicates to which extent the ad-
justable frequency drive imposes a load on the line
power supply.
The lower the power factor, the higher the I RMS for
the same kW performance.
In addition, a high power factor indicates that the different harmonic currents are low.
The adjustable frequency drive's built-in DC coils produce a high power factor, which minimizes the imposed
load on the line power supply.
Safety Precautions
WARNING
The voltage of the adjustable frequency drive is dangerous whenever connected to line power. Incorrect installation of
the motor, adjustable frequency drive or serial communication bus may cause damage to the equipment, serious per-
sonal injury or death. Consequently, the instructions in this manual, as well as national and local rules and safety
regulations, must be complied with.
Safety Regulations
1. The line power supply to the adjustable frequency drive must be disconnected whenever repair work is to
be carried out. Make sure that the line power supply has been disconnected and that the necessary time
has elapsed before removing motor and line power supply plugs.
2. The [OFF] button on the control panel of the adjustable frequency driver does not disconnect the line power
supply and consequently it must not be used as a safety switch.
3. The equipment must be properly grounded, the user must be protected against supply voltage and the
motor must be protected against overload in accordance with applicable national and local regulations.
4. The ground leakage current exceeds 3.5 mA.
5. Protection against motor overload is not included in the factory setting. If this function is desired, set par.
1-90 Motor Thermal Protection
6. Do not remove the plugs for the motor and line power supply while the adjustable frequency drive is con-
nected to line power. Make sure that the line power supply has been disconnected and that the necessary
time has elapsed before removing motor and line power plugs.
7. Please note that the adjustable frequency drive has more voltage sources than L1, L2 and L3, when load
sharing (linking of DC intermediate circuit) or external 24 V DC are installed. Make sure that all voltage
sources have been disconnected and that the necessary time has elapsed before commencing repair work.
Warning against unintended start
1. The motor can be brought to a stop by means of digital commands, bus commands, references or a local
stop, while the adjustable frequency drive is connected to line power. If personal safety considerations (e.g.,
risk of personal injury caused by contact with moving machine parts following an unintentional start) make
TR200 Programming Guide
Power factor
I
=
I
RMS
to data value ETR trip 1 [4] or data value ETR warning 1 [3].
Switching Pattern).
x U x I cos
3
1
=
x U x I
3
RMS
I
1 x cos 1
1
since cos
=
I I
RMS RMS
2 2 2
I I I
= + + + .. +
1 5 7
Introduction
1 = 1
2
I
n
2-7