4Specifications are subject to change without notice (30.06.1999)
RSE 22 .. - B, RSE 4. .. - B, RSE 60 .. - B
Time between rampings
To prevent the semiconduc-
tors from overheating, a cer-
tain time between ramping
should be allowed. The time
between rampings depends
on the motor current during
ramping and ramp time (see
tables below).
Fusing Considerations
The motor controller provides
by-passing of the semicon-
ductors during running opera-
tion. Therefore the semicon-
ductors can only be damaged
by short-circuit currents dur-
ing ramp-up and ramp-down
function.
A 3-phase induction motor
with correctly installed and
adjusted overload protection
does not short totally between
lines or directly to earth as
some other types of loads,
e.g. heater bands. In a failing
motor there will always be
some part of a winding to limit
the fault current. If the motor
is installed in an environment
where the supply to the motor
cannot be damaged, the short
circuit protection can be con-
sidered to be acceptable if the
controller is protected by a 3-
pole thermal-magnetic over-
load relay (see table below).
If the risk of short circuit of the
motor cable, the controller or
the load exists, then the con-
troller must be protected by
ultrafast fuses, e.g. for a 3 A
type: Ferraz 660 gRB 10-10,
for an 12 A type: Ferraz 660
gRB 10-25. Fuseholder type
PST 10.
Note:
Table is valid for ambient
temperature 25°C. For higher
ambient temperature add
5%/°C to values in the tables.
The shaded areas in the ta-
bles are for blocked rotor. Do
not repeat rampings with
blocked rotor.
RSE .. 03 - B
Time between rampings
12510
Ramp time (sec.)
I ramp (A)
RSE .. 12 - B
Time between rampings
12510
Ramp time (sec.)
72 2.5 min 5 min 40 min N/A
60 1.5 min 3 min 13 min 17 min
48 50 sec 1.5 min 5 min 10 min
36 30 sec 1 min 3 min 7 min
24 15 sec 40 sec 1.5 min 2.5 min
12 10 sec 20 sec 50 sec 70 sec
6 5 sec 9 sec 20 sec 40 sec
I ramp (A)
Recommended thermal-magnetic overload relay
Selection Chart
Thermal-magnetic overload relay and motor controller
Motor full load current (AACrms) 0.1 - 0.16 - 0.25 - 0.4 - 0.63 - 1.0 - 1.6 - 2.5 - 4 - 6.3 - 9 -
0.16 0.25 0.4 0.63 1.0 1.6 2.5 4 6.3 9 12
M 01 M 02 M 03 M 04 M 05 M 06 M 07 M 08 M 10 M 14 M 16
0.16 0.25 0.4 0.63 1 1.6 2.5 4 6.3 9 12.5
0.16 0.25 0.4 0.63 1 1.6 2.5 4 6.3 10 16
Overload relay type GV 2-
Manufacturer: Telemecanique
Overload relay type MS 325-
Manufacturer: ABB
Motor protection circuit breaker type KTA 3-25-
Manufacturer: Allan-Bradley/Sprecher + Schuh
RSE 22 12 - B
RSE 40 12 - B
RSE 48 12 - B
RSE 60 12 - B
Motor controller type:
127/220 V mains
230/400 V mains
270/480 V mains
400/690 V mains
RSE 22 03 - B
RSE 40 03 - B
RSE 48 03 - B
RSE 60 03 - B
Example:
Line voltage: 230/400 V
Motor 1.5 HP: 1.1 kW
Full load current: 2.9 A
Step 1:
Select overload relay:
In this example GV 2 - M 08,
MS 325 - 4 or KTA 3-25-4A
must be used.
Step 2:
Select motor controller:
For line voltage 230/400 V and
overload, relay GV 2 - M 08 or
MS 325 - 4 with a setting of
2.9 A type RSE 40 03 -B can
be selected.
N.B.: For motors with full load
current from 12 A to 40 A, see
types RSC/RSO.
18 15 sec 30 sec 1.5 min 2.5 min
15 12 sec 20 sec 60 sec 1.5 min
12 10 sec 20 sec 50 sec 70 sec
9 8 sec 12 sec 30 sec 50 sec
6 5 sec 9 sec 25 sec 40 sec
3 2 sec 5 sec 20 sec 35 sec
1.5 1 sec 2 sec 5 sec 5 sec
Applications