NORD Drivesystems BU0200 - Manual (Page 159)

SK 200E Manual for frequency inverters
158 Subject to technical alterations BU 0200 GB-4411
5.3 KTY84-130 connection
The current vector control of the SK 2xxE series can be further optimised by the use of a KTY84-130
temperature sensor (R
th(0°C)
=500

, R
th(100°C)
=1000

). By continuous measurement of the motor temperature,
the highest precision of regulation by the frequency inverter and the associated optimum speed precision of
the motor is achieved at all times. As the temperature measurement starts immediately after the (mains)
switch-on of the frequency inverter, the frequency inverter provides immediate optimum control, even if the
motor has a considerably increased temperature after an intermediate "Mains off / Mains on" of the
frequency inverter.
Connection example
SK CU4-IOE / SK TU4-IOE- …
Connection of a KTY-84 to either of the two analog inputs of the relevant option is possible. In the following
examples, analog input 2 of the particular optional module is used.
SK CU4-IOE SK TU4-IOE
(Illustration shows a section of the terminal blocks)
Parameter settings (Analog Input 2)
For the function of the KTY84-130, the following parameters must be set.
1. The motor data P201-P207 must be set according to the identification plate.
2. The motor stator resistance P208 is determined at 20°C with P220 = 1
3. Function of Analog Input 2, P400 [-04] = 30 (motor temperature)
4. Analog Input 2 mode, P401 [-02] = 1 (negative temperatures are also measured)
(from firmware version: V1.2)
5. Matching of Analog Input 2: P402 [-02] = 1.54V and P403 [-03] = 2.64V (with R
V
= 2.7 kOhm)
6. Matching of time constants: P161 [-02] = 400ms (Filter time constant is at a maximum)
Parameter (P161) is a module parameter. This cannot be set on the frequency inverter, but rather directly on the I/O-module.
Communication is carried out e.g. via the direct connection of a ParameterBox to the RS232 interface of the module or by the
connection of th
e frequency inverter via the system bus. (Parameter (P1101) object selection → … )
7. Motor temperature control (display): P739 [-03]
NOTE
For the determination of the motor stator resistance, the temperature must be within the range
15 … 25°C.
Overtemperature of the motor is monitored simultaneously and at 155°C (switching threshold as
for thermistor) the drive is shut down with error message E002.