CYGM
Motor Protectors
PTC (Positive Temperature Coefficient)
Motor Protectors
PTC Thermistors
act as thermal
protectors for electrical motors. They are
available with or without an insulated sleeve
and have flexible connecting leads. PTC
thermistors have a non-linear resistance/
temperature response.
At a specified
temperature the resistance changes rapidly to
a very high value.
CYGM1
Single Thermistor
with shrunk-sleeve & epoxy seal
Features
• Rapid response protection
for electrical machines
• Compact size for easy
assembly into windings
• Silvered copper leads
CEF1
Mount-on Sensor
in isolated brass/aluminium housing
Type
Response
Temp. δNAT
Colour
Code
Type
Response
Temp. δNAT
Colour
Code
CYGM1 C508
80 ±5
white - white
CEF1 C508
80 ±5
white - white
CYGM1 C509
90 ±5
green - green
CEF1 C509
90 ±5
green - green
CYGM1 C510
100 ±5
red - red
CEF1 C510
100 ±5
red - red
CYGM1 C511
110 ±5
brown - brown
CEF1 C511
110 ±5
brown - brown
CYGM1 C512
120 ±5
grey - grey
CEF1 C512
120 ±5
grey - grey
CYGM1 C513
130 ±5
blue - blue
CEF1 C513
130 ±5
blue - blue
CYGM1 C514
140 ±5
white - blue
CEF1 C514
140 ±5
white - blue
CYGM1 C545
145 ±5
white - black
CEF1 C545
145 ±5
white - black
CYGM1 C515
150 ±5
black - black
CEF1 C515
150 ±5
black - black
CYGM1 C655
155 ±5
blue - black
CEF1 C655
155 ±5
blue - black
CYGM1 C516
160 ±5
blue - red
CEF1 C516
160 ±5
blue - red
CYGM1 C517
170 ±5
white - green
CEF1 C517
170 ±5
white - green
CYGM1 C518
180 ±5
red - white
CEF1 C518
180 ±5
red - white
CYGM3
Triple Thermistor
with shrunk-sleeve & epoxy seal
Type
Response
Temp. δNAT
Colour Code
CYGM3 C508
80 ±5
white - yellow - yellow - white
CYGM3 C509
90 ±5
green - yellow - yellow - green
CYGM3 C510
100 ±5
red - yellow - yellow - red
CYGM3 C511
110 ±5
brown - yellow - yellow - brown
CYGM3 C512
120 ±5
grey - yellow - yellow - grey
CYGM3 C513
130 ±5
blue - yellow - yellow - blue
CYGM3 C514
140 ±5
white - yellow - yellow - blue
CYGM3 C545
145 ±5
white - yellow - yellow - black
CYGM3 C515
150 ±5
black - yellow - yellow - black
CYGM3 C655
155 ±5
blue - yellow - yellow - black
CYGM3 C516
160 ±5
blue - yellow - yellow - red
CYGM3 C517
170 ±5
white - yellow - yellow - green
CYGM3 C518
180 ±5
red - yellow - yellow - white
OPERATION
- PTC’s are classified according to their nominal
response temperature �NAT but all have similar
PTC thermistors exhibit very high sensitivity over a
Operation
resistance characteristics to simplify the choice
narrow temperature band. For temperature measureof switching device; the relationship of resistance
ment
in
this
range,
NTC
thermistors
are
easier
to
PTC thermistors exhibit very high sensitivity over a narrow to temperature of all these PTC’s is as follows:
measure andband.
more For
accurate.
temperature
temperature measurement in this
range, NTC thermistors are easier to measure and more
accurate.
STANDARD RESISTANCE VALUES
PTC thermistors are especially suited as temperature
Single PTC
PTC
thermistors
are especially
suited as
temperature sensors
sensors
for monitoring
the windings
of electric
Resistance
measuring Voltage
for
monitoring
thealso
windings
and also for Temperature
machines,
and
for useofinelectric
simple machines,
fail-safe circuitry.
°C
�
V
use
in simple
circuitry.
Whenresponse
a given tempetemperature
When
a givenfail-safe
temperature
(nominal
–
20
to
�
–
20
250
max./100
max.
2.5
(nominal
temperature
δNAT)can
is exceeded,
the circuit
NAT ) is exceeded,
the circuit
be switched
rature �response
550 max.
2.5
can
be switched
offorthrough
a relay
since the � – 5
off through
a relay
amplifier,
since or
theamplifier,
PTC-sensor
will have anwill
extremely
ohmic value
the region
PTC-sensor
have anhigh
extremely
high in
ohmic
value in the �
1.000
2.5
of its response
temperature.
This will
have
same
region
of its response
temperature.
This
willthe
have
the same
�
+5
1.330 min.
2.5
effectas
asaabreak
breakininthe
thecircuit
circuitorora afailure
failureofofthe
the
effect
thermistor.
� + 15 - PTC’s are classified
4.000 min
7.5
thermistor
according to their nominal
OPERATION
.
�NAT but all
response
Technical
data exhibit very high sensitivity over a Triple PTC
PTC thermistors
• PTC’s
are temperature
classified according
to have
their similar
nominal response
resistance
characteristics
to
simplify
the choice
narrow temperature band. For temperature measuretemperature δNAT but all have similar resistance characteristics
the relationship
of Voltage
resistance
Temperatureof switching device;
Resistance
measuring
Nominal response
80 ° to 180 are
°C ineasier
steps to
ment intemperature
this range, NTC thermistors
to simplify
the choice
ofthese
switching
device;
the Vrelationship of
°C
�
to
temperature
of
all
PTC’s
is
as
follows:
of 10 °, plus 145 ° and 155 °C
measure and more accurate.
resistance to temperature of all these PTC’s is as follows:
– 20 to � – 20
750 max./300 max.
7.5
Maximum allowable operating temp.
T 200 °C
�
–
5
1.650
max.
7.5
Max. allowable operating voltage at + 25 °C
U 25V (per bead)
StandardRESISTANCE
ResistanceVALUES
Values
STANDARD
� +5
4.000 min.
7.5
Max. allowable power dissipation at + 25 °C
690 mW
PTC thermistors are especially suited as
temperature
Single PTC
� + 15
4.000 min.*
7.5
Insulation strength
leads and the
outerwindings
insulation) of electric
sensors(between
for monitoring
Temperature
Resistance
measuring Voltage
also for threaded
sensorand also for use in simple fail-safe
2.5 kV circuitry.
machines,
°C
�
V
a given
ConductorsWhen
- silvered
coppertemperature
wire with teflon (nominal
insulation response
PTFE tempe– 20 to � – 20
250 max./100 max.
2.5
can be
switched * one PTC might reach � + 15 °C, while the second or even both
rature �NAT) is exceeded, the circuitapprox
Insulation stripping
10 mm
� could
– 5 still remain at room temperature.
550 max.
2.5
off through a relay or amplifier, since the PTC-sensor of the others
Conductor will
cross-section
0.25 ohmic
mm for value
single, double
have an extremely high
in the region
�
1.000
2.5
PTC’s
of its response temperature. Thisand
willtriple
have
the same
�
+5
1.330 min.
2.5
The PTC’s resistance values for motor protection are
effect as a break in the circuit or a failure of the
+ 15 44081/44082. Resistance
4.000 min values
7.5
specified�in DIN
thermistor
Conductor
lengths
below �NAT –20 are not specified, and resistance
.
CONDUCTOR
LENGTHS
when cold
is noPTC
indication of the PTC’s condition. It is
Triple
Single
PTC 500 mm ± 10500
mm
Single PTC
mm � 10 mm
ideally between
40
- 200 ohms but
can be anywhere
DoublePTC
PTC
500
180
500
m
�
10
mm
Triple
500
180
180
500
mm
±
10
mm
Temperature
Resistance
measuring Voltage
Nominal response temperature
80 ° to 180 °C in steps
between
35
250
ohms.
Triple PTC
500 - 180 - 180 - 500
mm
10145
mm° and 155 °C
°C
�
V
of 10
°, �
plus
The greatest
resistance
change
occurs
between
– 20 to � – 20
750 max./300 max.
7.5
Maximum allowable operating temp.
T 200 °C
�5 °C either side of �NAT, being at least 15%/K.
Special
versions
�
–
5
1.650
max.
7.5
Max. allowable operating voltage at + 25 °C
U 25V (per bead)
SPECIAL
VERSIONS
PTC’s
are also
available in many special housings (can be
� +5
4.000 min.
7.5
Max. allowable power dissipation at + 25 °C
690 mW
PTC’s are also
inspecifications)
many special housings
manufactured
to available
customers
� + 15
4.000 min.*
7.5
Insulation strengthto(between
leads specifications)
and outer insulation)
(can be manufactured
customers
NAT
NAT
NAT
NAT
NAT
NAT
max.
NAT
max.
NAT
NAT
NAT
NAT
NAT
2
NAT
NAT
NAT
NAT
max.
NAT
max.
NAT
NAT
also for threaded sensor
Installation
tipscopper wire with teflon insulation
Conductors - silvered
2.5 kV
* one PTC might reach δNAT + 15 °C, while the second or even
Twin/double
and
PTC’s
are
available
with
both of
thetriple
others
could
still
remain at
room temperature.
* or
onemini-bead.
PTC might reach � + 15 °C, while the second or even both
For
PTC temperature
sensors in electrical windings: approx 10 mm
Insulation stripping
INSTALLATION
TIPS
standard
The
PTC’s
resistance
values
for
motor
protection
are specified
of the others could still remain at room temperature.
- For
the PTC
thermistors
can
only
be inserted
in the
windings
before
Conductor
cross-section
0.25
mm for single,
double
temperature
sensors
in electrical
windings:
in DIN 44081/44082. Resistance values below δNAT –20 are
and triple PTC’s
impregnation
- the thermistors can only be inserted in the windings
not specified, and resistance when cold is no indication of the
- it before
is advisable
to
embed
one
in
each
phase,
if
possible
in the
The PTC’s
resistance
values
for motor
arebut can
impregnation
PTC’s
condition.
It is ideally
between
40 protection
- 200 ohms
centre of the coil generating most heat, and generally on the QUALITY
STANDARD
specified
in
DIN
44081/44082.
Resistance
values
be anywhere between 35 - 250 ohms.
- it is advisable to embed one in each phase, if
outflow
side
anycentre
air movement
NATcarried
–20 areout
notaccording
specified,toand
resistance
Randombelow
testing�is
DGQ
CONDUCTOR
LENGTHS
possible
inofthe
of the
coil generating most
- air
inflow
onto
the temperature
sensor
willofinterfere
with heat P90/P10
when
cold
is
no
indication
of
the
PTC’s
condition.
is either
(DIN
40080).
AQL
values
can
be
fixed
by
heat,
and
generally
on
the
outflow
side
any
air
The greatest resistance change occurs between
±5 It°C
Single PTC
500 mm � 10 mm
ideally between 40 - 200 ohms but can be anywhere
transfer
arrangement.
movement
Double PTC
500 - 180 - 500 m � 10 mm
side of δNAT, being at least 15%/K.
between 35 - 250 ohms.
- -ifairusing
varnish/lacquer
which 500
is -not
chemically
Triple
PTC
180 will
- 180interfere
- 500 mmneutral,
� 10 mm
inflow
onto
the temperature
sensor
suitability
tests
must
be
undertaken
by
the
customer
The greatest resistance change occurs between
with heat transfer
�5Quality
°C either side
of �NAT, being at least 15%/K.
- WARNING! It is very important that the sensor must be
standard
- if using varnish/lacquer which is not chemically
ORDERING INFORMATION
installed
parallel
with
the
copper
of
the
winding,
so
that
the
VERSIONS
Random testing is carried out according to DGQ P90/P10
neutral,SPECIAL
suitability tests
must be undertaken by the
teflon
leads
can
assume
the
form
of
the
rest
of
the
winding
customer
Quantity
Type
Temperature
Resistance
(DIN 40080).
AQL values
can be fixed
by arrangement.
PTC’s are also available in many special housings
and thereby
retain
the high- voltage
resistancespecifications)
rating.
code No.
max.
(can
be
manufactured
to
customers
- WARNING! It is very important that the sensor must
1.000
YD1
C
510
250
ohms
be installed parallel with the copper of the winding,
so that the teflon leads can assume the form of the
Twin/double and triple PTC’s are available with
rest of the
winding and thereby
INSTALLATION
TIPSretain the highstandard or mini-bead.
voltage resistance rating.
For PTC temperature sensors in electrical windings:
- the thermistors can only be inserted in the windings
before impregnation
QUALITY STANDARD
- it is advisable to embed one in each phase, if
PTFE
NAT
2
Temperature-Resistance Curve
Ordering Information
Quantity
Type
Temp. code No.
Resistance max.
1.000
CYGM1
C 510
250 ohms
Thermal Protection & Controls Limited
Suite 39, Wimbledon Studios, 1 Deer Park Road, London, SW19 3TL, UK
Tel : +44(0)20 3490 4299
Fax : +44(0)20 3163 0674
8415 Mountain Sights Avenue • Montreal (Quebec), H4P 2B8, Canada
Tel: (514) 739-3274 • 1-800-561-7207 • Fax: (514) 739-2902 • E-mail: sales@cantherm.com
Website: www.cantherm.com | Division of Microtherm
2011/MAY PTC