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PTC Thermistors Temperature Sensors for Motor Protection and Electronics
(temperature-sensitive resistors)
YD YG YD YG EF YGM YGM TKA TKA 1 1 3 3 1 1 3 1 2
FEATURES
- rapid response protection for electrical machines - compact size for easy assembly into windings - silvered copper leads
DESCRIPTION
PTC thermistors act as thermal protection for electrical machines, and are well known particularly as motor-protectors. They are available with or without insulating sleeve and have flexible connecting leads. PTC thermistors have a non-linear resistance/temperature response, and at a specified temperature the resistance changes rapidly to a very high value.
DIMENSIONS
YD 1 Single thermistor with shrunk-sleeve YGM 1 Mini-version with shrunk-sleeve
YD 3 Triplet version (in series)
YGM 3 Mini-version
EF 1 Sensor
Standard
mini
threaded
PTC-Thermistors 02-02-02 1000-Y-180
CANTHERM
8415 Mountain Sights Avenue * Montreal (Quebec), H4P 2B8, Canada Tel: (514) 739-3274 * 1-800-561-7207 * Fax: (514) 739-290 E-mail : sales@cantherm.com * Website: www.cantherm.com
Cantherm
OPERATION
PTC thermistors exhibit very high sensitivity over a narrow temperature band. For temperature measurement in this range, NTC thermistors are easier to measure and more accurate.
- PTC's are classified according to their nominal response temperature NAT but all have similar resistance characteristics to simplify the choice of switching device; the relationship of resistance to temperature of all these PTC's is as follows:
STANDARD RESISTANCE VALUES
PTC thermistors are especially suited as temperature sensors for monitoring the windings of electric machines, and also for use in simple fail-safe circuitry. When a given temperature (nominal response temperature NAT) is exceeded, the circuit can be switched off through a relay or amplifier, since the PTC-sensor will have an extremely high ohmic value in the region of its response temperature. This will have the same effect as a break in the circuit or a failure of the thermistor. Single PTC
Temperature C - 20 to
NAT NAT
Resistance
measuring Voltage V 2.5 2.5 2.5 2.5 7.5
- 20
250 max./100 max. 550 max. 1.000
-5
NAT
NAT
+5 + 15
1.330 min. 4.000 min
NAT
TECHNICAL DATA
Nominal response temperature Maximum allowable operating temp. Max. allowable operating voltage at + 25 C Max. allowable power dissipation at + 25 C Insulation strength (between leads and outer insulation) also for threaded sensor Conductors - silvered copper wire with teflon insulation Insulation stripping Conductor cross-section
2
Triple PTC
80 to 180 C in steps of 10 , plus 145 and 155 C Tmax. 200 C Umax. 25V (per bead) 690 mW 2.5 kV PTFE * one PTC might reach NAT + 15 C, while the second or even both of the others could still remain at room temperature. Temperature C - 20 to
NAT NAT
Resistance
measuring Voltage V 7.5 7.5 7.5 7.5
- 20
750 max./300 max. 1.650 max. 4.000 min. 4.000 min.*
-5 +5 + 15
NAT
NAT
approx 10 mm 0.25 mm for single, double and triple PTC's
CONDUCTOR LENGTHS
Single PTC Double PTC Triple PTC 500 mm 10 mm 500 - 180 - 500 m 10 mm 500 - 180 - 180 - 500 mm 10 mm
The PTC's resistance values for motor protection are specified in DIN 44081/44082. Resistance values below NAT -20 are not specified, and resistance when cold is no indication of the PTC's condition. It is ideally between 40 - 200 ohms but can be anywhere between 35 - 250 ohms. The greatest resistance change occurs between 5 C either side of NAT, being at least 15%/K.
SPECIAL VERSIONS
PTC's are also available in many special housings (can be manufactured to customers specifications) Twin/double and triple PTC's are available with standard or mini-bead.
INSTALLATION TIPS
For PTC temperature sensors in electrical windings: - the thermistors can only be inserted in the windings before impregnation - it is advisable to embed one in each phase, if possible in the centre of the coil generating most heat, and generally on the outflow side of any air movement - air inflow onto the temperature sensor will interfere with heat transfer - if using varnish/lacquer which is not chemically neutral, suitability tests must be undertaken by the customer - WARNING! It is very important that the sensor must be installed parallel with the copper of the winding, so that the teflon leads can assume the form of the rest of the winding and thereby retain the highvoltage resistance rating.
QUALITY STANDARD
Random testing is carried out according to DGQ P90/P10 (DIN 40080). AQL values can be fixed by arrangement.
ORDERING INFORMATION
Quantity 1.000 Type YD1 Temperature code No. C 510 Resistance max. 250 ohms
PTC-Thermistors 02-02-02 1000-Y-180
Single PTC
YD = standard size bead 4 mm with shrunk-sleeve YG = standard size bead 4 mm with shrunk-sleeve and epoxy seal YGM = mini-bead 3 mm with shrunk-sleeve and epoxy seal
Type YD1 YD1 C508 YD1 C509 YD1 C510 YD1 C511 YD1 C512 YD1 C513 YD1 C514 YD1 C545 YD1 C515 YD1 C655 YD1 C516 YD1 C517 YD1 C518 Type YG1 YG1 C508 YG1 C509 YG1 C510 YG1 C511 YG1 C512 YG1 C513 YG1 C514 YG1 C545 YG1 C515 YG1 C655 YG1 C516 YG1 C517 YG1 C518 Type YGM1 YGM1 C508 YGM1 C509 YGM1 C510 YGM1 C511 YGM1 C512 YGM1 C513 YGM1 C514 YGM1 C545 YGM1 C515 YGM1 C655 YGM1 C516 YGM1 C517 YGM1 C518 Resp. Std. Colour code temp. NA 80 90 100 110 120 130 140 145 150 155 160 170 180 5 5 5 5 5 5 5 5 5 5 5 5 5 white - white green - green red - red brown - brown grey - grey blue - blue white - blue white - black black - black blue - black blue - red white - green red - white
TEMPERATURE-RESISTANCE CURVE
Triple PTC
YD = standard size bead 4 mm with shrunk-sleeve YG = standard size bead 4 mm with shrunk-sleeve and epoxy seal YGM = mini-bead 3 mm with shrunk-sleeve and epoxy seal
Type YD3 YD3 C508 YD3 C509 YD3 C510 YD3 C511 YD3 C512 YD3 C513 YD3 C514 YD3 C545 YD3 C515 YD3 C655 YD3 C516 YD3 C517 YD3 C518 Type YG3 YG3 C508 YG3 C509 YG3 C510 YG3 C511 YG3 C512 YG3 C513 YG3 C514 YG3 C545 YG3 C515 YG3 C655 YG3 C516 YG3 C517 YG3 C518 Resp. temp. NA 80 90 100 110 120 130 140 145 150 155 160 170 180 5 5 5 5 5 5 5 5 5 5 5 5 5 Std. Colour code YD YG white - black - black - white green - black - black - green red - black - black - red brown - black - black - brown grey - black - black - grey blue - black - black - blue white - black - black - blue white - black - black - black black - black - black - black blue - black - black - black blue - black - black - red white - black - black - green red - black - black - white
Mini PTC
YGM = mini-bead 3 mm with shrunk-sleeve and epoxy seal
Type YGM3 YGM3 C508 YGM3 C509 YGM3 C510 YGM3 C511 YGM3 C512 YGM3 C513 YGM3 C514 YGM3 C545 YGM3 C515 YGM3 C655 YGM3 C516 YGM3 C517
PTC-Thermistors 02-02-02 1000-Y-180
Threaded housing
YGM mini-bead 3 mm with shrunk-sleeve and epoxy seal
Type EF1 EF1 C508 EF1 C509 EF1 C510 EF1 C511 EF1 C512 EF1 C513 EF1 C514 EF1 C545 EF1 C515 EF1 C655 EF1 C516 EF1 C517 EF1 C518 Resp. temp. NA 80 90 100 110 120 130 140 145 150 155 160 170 180 5 5 5 5 5 5 5 5 5 5 5 5 5 Std. Colour code white - white green - green red - red brown - brown grey - grey blue - blue white - blue white - black black - black blue - black blue - red white - green red - white Resp. temp. NA 80 90 100 110 120 130 140 145 150 155 160 170 180 5 5 5 5 5 5 5 5 5 5 5 5 5 Std. Colour code YGM3 white - yellow - yellow - white green - yellow - yellow - green red - yellow - yellow - red brown - yellow - yellow - brown grey - yellow - yellow - grey blue - yellow - yellow - blue white - yellow - yellow - blue white - yellow - yellow - black black - yellow - yellow - black blue - yellow - yellow - black blue - yellow - yellow - red white - yellow - yellow - green red - yellow - yellow - white
YGM3 C518
When ordering please specify thread size, otherwise the stock M4 size will be supplied.
PTC SWITCHING DEVICE TYPE TKA1, TKA2 PTC RELAY UNIT TYPE TKA1, TKA2 FEATURES
q sensor and relay unit are both interchangeable q fixed sensor response temperature from 80 - 180 C q safe monitoring of sensing circuit and sensor q upto 6 PTC's can be connected q quick installation housing (DIN-EN 50022) or screw fixing (M4) q also available with push-button test light (can be retrofitted)
ELECTRICAL DATA
POWER SUPPLY: Voltage: 42 V, 110 V, 230 V, 400 V, 415 V0 ac Special voltages: eg dc, please ask Tolerance: + 10 % ... - 15 % Power consumption: less than 3VA Frequency: 40 - 60 Hz Operating temp.: - 20 C to 60 C RELAY OUTPUT 1 change-over contact Switching capacity at 250V Use category AC 11 3A Continuous current rating 6A Max. current rating of overload fuse 6 A VOLTAGE TESTING Test voltage between supply, relay contacts and PTC circuit, 2.5 kV Test voltage on output contacts, 1.0 kV PTC CONNECTION Max. quantity of PTC connectable: 6 pcs Terminal voltage for PTC's Range: larger 1.6 k Smaller 3.6 k +/- 10 %
DESCRIPTION
These PTC relay units have been developed as state of the art devices. All other commercially available units can be replaced with ours. Relay unit and sensors as per DIN 44081 and 44082 give optimum protection against thermal overload. Together they provide a rapid and reliable motor-protection system. Two basic formats are available: TKA1 for applications where space is at a premium TKA2 in a DIN housing, eg. for use in control panels Any PTC thermistors that conform to DIN 44081 or 44082 can be connected to these relay units.
SPECIAL VERSIONS
PTC sensors can be delivered with a warning label/ tag. This has a 4 cm cord, so that the tag can be seen from the exterior when attached to the motor, equipment or plant, and will warn against applying voltages higher than 2.5V (surely this should be 2.5 kV). The ordering code for this label ist K105.
INSTALLATION
Screw or snap-on fixing TKA2 Installed on a 35 mm rail to DIN 46277 B.3 by means of an integral snap-on housing. Screw fixing TKA1
We reserve the right to alter specifications without notice.
8415 Mountain Sights Avenue * Montreal (Quebec), H4P 2B8, Canada Tel: (514) 739-3274 * 1-800-561-7207 * Fax: (514) 739-290 E-mail : sales@cantherm.com * Website: www.cantherm.com
PTC-Thermistors 02-02-02 1000-Y-180
CANTHERM

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