Technical Specifications
Item no. 11303003, Revision 02
17 ( 36 )
6.4
Motor protection PTC 130°C
PTC thermistor with protective insulation
Characteristic curves for rated response temperatures 90°C to 160°C in accor-
dance with DIN VDE V 0898-1-401.
Positive temperature coefficient
thermistor resistance (R
PTC
)
according to the positive
temperature coefficient thermistor
temperature (T
PTC
) (small-signal
resistance).
Technical Specifications
Type
M135
Max. operating voltage
(T
A
= 0 … 40°C)
V
max
.
30 V
Max. measuring voltage
(T
A
– 25 K … T
NAT
+ 15 K)
V
Meas, max
7.5 V
Nominal resistance
(V
PTC
≤ 2.5 V)
RN
≤ 250 Ω
Insulation test voltage
V
is
3 kV~
Response time
t
a
< 2.5 s
Operating temperature range
(V=0)
T
op
-25/+180°C
Resistance values
T
NAT
±ΔT
R (T
NAT
– ΔT)
(V
PTC
≤ 2.5 V)
R (T
NAT
– ΔT)
(V
PTC
≤ 2.5 V)
R (T
NAT
+ 15 K)
(V
PTC
≤ 7.5 V)
R (T
NAT
+ 23 K)
(V
PTC
≤ 2.5 V)
130 ±5°C
≤ 550 Ω
≥ 1330 Ω
≥ 4 kΩ
----
6.5
ESD protection
ESD protection is provided by creating an electrically conductive connection
between the rotating shaft of the HF spindle and the motor housing.
q
Depending on the operating time, the electrical resistance of this sliding
contact is <1 kΩ.
q
The wear on the sliding contact is not monitored.
