Safety Regulations - Danfoss VLT AutomationDrive Programming Manual

Introduction
1 1
Slip Compensation
The Adjustable frequency drive compensates for the motor
slip by giving the frequency a supplement that follows the
measured motor load keeping the motor speed almost
constant.
Smart Logic Control (SLC)
The SLC is a sequence of user-defined actions executed
when the associated user-defined events are evaluated as
true by the Smart Logic Controller. (Par. group 13-** Smart
Logic Control (SLC).
STW
Status Word
FC Standard Bus
Includes RS-485 bus with FC protocol or MC protocol. See
8-30 Protocol.
Thermistor
A temperature-dependent resistor placed where the
temperature is to be monitored (Adjustable frequency
drive or motor).
Trip
A state entered in fault situations, e.g., if the Adjustable
frequency drive is subject to an over-temperature or when
the Adjustable frequency drive is protecting the motor,
process or mechanism. Restart is prevented until the cause
of the fault has disappeared and the trip state is cancelled
by activating reset or, in some cases, by being
programmed to reset automatically. Trip may not be used
for personal safety.
Trip Locked
A state entered in fault situations when the Adjustable
frequency drive is protecting itself and requiring physical
intervention, e.g., if the Adjustable frequency drive is
subject to a short circuit on the output. A locked trip can
only be canceled by cutting off line power, removing the
cause of the fault, and reconnecting the Adjustable
frequency drive. Restart is prevented until the trip state is
cancelled by activating reset or, in some cases, by being
programmed to reset automatically. Trip may not be used
for personal safety.
VT Characteristics
Variable torque characteristics used for pumps and fans.
plus
VVC
If compared with standard voltage/frequency ratio control,
Voltage Vector Control (VVC
and the stability, both when the speed reference is
changed and in relation to the load torque.
60° AVM
Switching pattern called 60° Asynchronous Vector
Modulation (14-00 Switching Pattern).
1-4
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FC 300 Programming Guide
plus
) improves the dynamics
®
MG33MD22 - VLT
Power Factor
The power factor is the relation between I
x U x I 1 cos ϕ
3
Power factor =
3 x U x I RMS
The power factor for 3-phase control:
I 1
I 1 x cos ϕ1
since cos ϕ1 = 1
= =
I RMS I RMS
The power factor indicates to which extent the Adjustable
frequency drive imposes a load on the line power supply.
The lower the power factor, the higher the I
same hp [kW] performance.
I 1 2 + I 5 2 + I 7 2 + .. + I n 2
I RMS =
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.
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 communi-
cation bus may cause death, serious personal injury or
damage to the equipment. 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 drive 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 1-90 Motor Thermal Protection to data value
ETR trip 1 [4] or data value ETR warning 1 [3].
is a registered Danfoss trademark
and I .
1 RMS
for the
RMS