KEB COMBIVERT F4-C Applications Manual page 154

Functional Description
Picture 6.7.4.b Tripping times of motor protective function
For self-ventilated motors the
tripping times decrease with the
frequency of the motor (see
picture 6.7.4.b). The
protective function
integrating, i.e. times
overload on the motor are added,
times with underload
substracted. After triggering the
motor protective function, the
new tripping time is reduced to
1/4 of the specified value, if the
motor has not been operated for
an appropriate time
underload.
External error control
procedure
E.dOH Switch-off delay (Pn.16)
Used Parameters
R/W PROG.
Param. Adr.
Pn.3 2203h
Pn.15 220Fh
Pn.16 2210h
dr.2 2402h
ru.9 2009h -
Chapter Section Page
6 7 10
Tripping time
120 min
60 min
motor
acts
with
are
30 min
with
2 min
1 min
30 sec
5 sec
The KEB COMBIVERT provides another possibilitiy to protect the motor by connecting
an external temperature monitoring. Following components can be connected to
terminals OH/OH:
OH
OH
Bridge when no
external evaluation
takes place
If the thermo contact opens or the temperature sensor rises via the operating initial
resistance, the internal switching condition 6 is set. With do.1...do.4 a digital output
can be set (see Chap. 6.3). After expiration of an adjustable time (Pn.16) , the inverter
switches off with error E.dOH.
ENTER
min
- 0
- 0
- - 0 120s
- 0,0 460,0A
- - 0,0 460,0A
Date Name: Basis
21.04.99 KEB COMBIVERT F4-C
Keep on Running Functions
f ≥ Rated motor frequency or
f = 0 Hz
forced-ventilated motor
120
50 100 150 200
OH
OH
Thermo contact
(NC contact)
Step
max
default
4 1 0
7 1 0
1s 10s
0,1A LTK
0,1A -
Motor current
%
400 600 800
OH
OH
Temperature sensor (PTC)
1650Ω...4kΩ tripping resistance
750Ω...1650Ω reset resistance
-
-
-
depending on power circuit
-
© KEB Antriebstechnik, 1999
All Rights reserved