Ephy-Mess PR-SPA-EX-WKF User manual

Manual
Temperature sensor PR-SPA-EX-WKF

EPHY-MESS GmbH • Berta-Cramer-Ring 1• 65205 Wiesbaden • Germany • phone: [phone] fax: [phone] • [e-mail]
Manual
Temperature sensor PR-SPA-EX-WKF
1. Manufacturer and distributor
EPHY-MESS GmbH phone: [phone]
Berta-Cramer-Ring 1 fax: [phone]
65205 Wiesbaden email: [e-mail]
Germany
2. Applied standards
DIN EN 60079-0:2012 + A11:2013 (IEC 60079-0:2011, modified + Cor.: 2012 + Cor.: 2013)
DIN EN 60079-7:2015 (IEC 60079-7:2015)
DIN EN 60079-11:2012 (IEC 60079-11:2011 + Cor.:2012)
DIN EN 60079-31:2014 (IEC 60079-31:2013)
3. Labeling
3.1 Equipment protection by increased safety
Labeling according to manual
*not for bimetallic switches
3.2 Equipment protection by intrinsic safety
Labeling according to manual
4. Assembly
4.1 Installation in the winding of an electrical machine (V1/V2)
There are any special conditions, which must be observed during installation of temperature sensors
PR-SPA-EX-WKF in the winding of electrical machines (for example: motor, generator or
transformer).
The dimensions allow the fixed assembly directly between the coil wires of the electrical machinery.
The type of construction guarantees a good thermal contact between the monitored components and
the temperature sensor.
High bending loads (flexing) as well as mechanical point loads on the temperature sensor during
installation and operation must be avoided.
During installation one has to pay attention that no damage occurs to cable and insulation.
The supply lines (connecting wires) have to be installed strain-relieved.
The sensor user must specify the used protection type and document it carefully.
II 2D Ex tb IIIC Db

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4.2 Installation in the slot of an electrical machine (V3)
Temperature sensors of type PR-SPA-EX-WKF are specially designed for the assembly into blind
hole drillings in electric motors (generators) or other electrical machinery.
The assembly / the installation can be done with a specific moveable fitting with Teflon, brass or steel
clamp ring, aligned to the protection pipe diameter, or with a bayonet cap system.
If moveable fittings are used the nominal length can be matched to the requirements on-site.
The protection pipe of the thermometer must be mounted protected along its full length (e.g. in a blind
hole- or through bore-hole).
Bending loads (flexing) as well as mechanical loads on the temperature sensor (protection pipe and
cable exit) during installation and operation must be avoided.
During installation one has to pay attention that no damage occurs to cable and insulation.
The supply lines (connecting wires) have to be installed strain-relieved.
The sensor may be operated only in according to regulations and in undamaged, clean state.
The temperature sensors must be connected to the local potential equalization.
The thermometers don’t need to be grounded in the case of a completely insulated protection pipe. If
a clamp fitting is used the clamp ring must be made of Teflon.
During mounting and installations at and with the sensor, as well as during the on-site installation, the
national and international safety- and accident prevention regulation must be observed.
For long supply lines the specific length dependent capacities and inductances have to be observed.
The special conditions of the type examination certificate have to be observed.
The sensor user must specify the used protection type and document it carefully.
4.3 Usage outside the winding of an electrical machine
At this type of use, wherein the sensor is in direct contact with the explosive atmosphere are the self-
heating and the resultant increase of the surface temperature be observed.
Temperature class
Maximum surface temperature of the
equipment
Ignition temperature of the
flammable materials
T1
450°C
> 450°C
T2
300°C
> 300°C < 450°C
T3
200°C
> 200°C < 300°C
T4
135°C
> 135°C < 200°C
T5
100°C
> 100°C < 135°C
T6
85°C
> 85°C < 100°C
4.4 Self-heating
When measuring the electrical resistance value, the current flows through the temperature sensor.
Depending on the external influences, this causes power dissipation and thus a self-heating of the
temperature sensor. Since a measuring current of 1 mA is generally not exceeded, the power dissipation
of a Pt100 is in the range of a few tenths of a milliwatt and normally does not produce any significant
measuring error. Otherwise, the self-heating must be observed so that the permissible maximum
temperature is not exceeded and measurement errors are avoided.

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Sample calculation for the self-heating, which the end user has to consider in his application:
Ohm's law:
1] U = R x I → I = 

[2] P = U x I
[3] P = R x I2
P = electrical power / W
R = sensor resistance / Ω
I = measuring current / A
U = voltage / V
[4] R(t) = R0(1 + A t + B t2)
R(t) = resistance at temperature t / Ω
T = temperature / °C
R0 = nominal resistance at 0 °C / Ω
A = 3.90802E-3 x°C-1
B = -5.802E-7 x °C-2
[5] ∆T = E x P = E x 
= E x R x I²
E = self-heating coefficient, KmW-1 = 0.4 KmW-1 *
∆T = self-heating
T = permissible surface or ambient temperature
R (180°C) = 100 Ω x (1+ 3.90802E-3 x°C-1x180°C+(-5.802E-7 x °C-2 x (180°C)²) = 168.48 Ω
P (180°C) = 168.48 Ωx (0.001 A)² ** = 0.00016848 W → 0.16848 mW
∆T = 0.4 K/mW x 0.16848 mW = 0.067392 K
T= 180°C –0.067392°C = 179.932608°C
* This calculation is applicable to one measuring circuit. If several (n) measuring circuits are included in a sensor, k
must be replaced by n x k in the formulae.
** As an example we take 1 mA, because generally a measuring current of 1 mA is not exceeded.

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4.5 Self-heating coefficients
Sensor/Variant
Self-heating coefficients
Pt/Ni/Cuxxxxx
0.4 K/mW
TE
0 K/mW
KTYxx
0.4 K/mW
PTC-NATxxx
Not relevant because
of characteristic curve
BIS
Not applicable*
*only under observation of max. switching currents, see technical data, p. 6
4.6 Electrical data
Characteristic values
Gas / Dust
Ex e
Ex i
Max. voltage UI
Chip, Class A
DC 17 V
DC 17 V
Chip, Class B
DC 25 V
DC 25 V
Max. current II
Chip, Class A
55 mA
55 mA
Chip, Class B
80 mA
80 mA
Max. power PI
Chip, Class A
1 W
1 W
Chip, Class B
2 W
2 W
Permissible surface/
ambient temperature
Tmax –self-heating
Tmax - self-heating
Capacity CI
negligible
negligible
Inductivity LI
negligible
negligible
For the error analysis acc. to DIN EN 60079-ff. the permissible electrical values must be
considered carefully. The maximum permissible ambient temperatures must be calculated and
ensured under consideration of the self-heating.
The equipment operators must ensure that these values will not be exceeded.
5. Connection
Constructions with plugs are generally available with Ex i ignition protection. The operating temperatures
and the electrical values of the each plug must be considered.
5.1 Connecting wires (V1/V2)
The supply lines of the sensors are color-coded according to the color code and type of circuit related
to the used resistance sensor (see 9.1 Circuit and labeling of the connecting wires).
The connector ends have to be attached to suitable clamps only.
The sensor supply lines (connecting wires) may only be connected to power supply units suitable and
approved for passive resistance sensors according to the standards belonging to the resistance
thermometer.
The power supply must have a connection adequate to the thermometer’s type of circuit (2- 3- or 4-
wire circuit).

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The electrical operation values have to be observed (see Technical data, p.6).
The sensor signal for the resistance sensor version and the thermistor version has no polarity. The
color code of the supply line is used only for the identification of sensor and circuit!
The sensor signal for the thermocouple version and KTY-sensor version has polarity. For the
thermocouples the plus- and minus pole are color coded according the valid standard. The KTY is
color coded.
The connecting cables must be laid straight and without loops.
It is not allowed to connect, install or apply in another way than described under the points 4 and 5.
Only mechanically protected sensors can be mounted.
The cable of a sensor with a bimetallic switch as a measuring element must not be laid overlapping
and touchingly.
5.2 Connecting wires (V3)
The connecting wires are color coded according color code and mode of circuit of the used resistance
sensors / thermocouples (see 9.1 and 9.2 circuit and labeling of connecting wires).
The connector ends have to be attached to suitable clamps only.
The sensor supply lines (connecting wires) may only be connected to power supply units suitable and
approved for passive resistance sensors / thermocouples according to the corresponding standards.
If the sensor is intended to be used in an explosive-area, the connection may be performed only in a
connection area, which is approved according the valid standards or outside the explosive-area.
The power supply must have a connection adequate to the thermometer’s type of circuit (2-, 3- or 4-
wire-circuit).
The electrical operation values have to be observed (see Technical data, p.6).
The sensor signal for the resistance sensor version and the thermistor version has no polarity. The
color code of the supply line is used only for the identification of sensor and circuit!
The sensor signal for the thermocouple version and KTY-sensor version has polarity. For the
thermocouples the plus- and minus pole are color coded according the valid standard. The KTY is
color coded.
The potential equalization occurs via assembly fitting.
The thermometers don’t need to be grounded in the case of a completely insulated protection pipe
and an installation with a clamp fitting with Teflon clamp ring.
The connecting cables must be laid straight and without loops.
It is not allowed to connect, install or apply the PR-SPA-EX-WKF sensor in another way than
described under item 4 and 5.
Only mechanically protected sensors can be mounted.
The cable of a sensor with a bimetallic switch as a measuring element must not be laid overlapping
and touchingly.

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6. Technical data
Description Temperature sensor PR-SPA-EX-WKF, acc. to drawings:
999130613906001 (version 1- version 3)
Construction Version (V1): measuring resistance with fix connected supply lines, insulated
with single shrinking tube. Solder joints insulated with shrinking tube.
Version (V2): measuring resistance with fix connected supply lines and
encapsulated with silicone in ceramic sleeve. Solder joints insulated with
shrinking tube.
Version (V3): measuring resistance with fix connected supply lines,
shockproof mounted in metallic protection pipe (casted, corrugated or closed
by rolling bead).
Approval IBExU 14 ATEX 1281 U
IECEx IBE 14.0058 U
Type of protection II 2G Ex ia IIC Gb / II 2D Ex ia IIIC Db
II 2G Ex eb IIC Gb* / II 2D Ex tb IIIC Db*
*Not for bimetallic switches
Sensor insulation Version (V1): insulation hose (shrinking tube)
Version (V2): ceramic sleeve and silicone
Version (V3): insulation hose and metallic protection pipe (casted,
corrugated or closed by rolling bead)
Dimensions (TxWxL) Version (V1-V3): T mm x W mm x L mm
Ambient temperature Resistance sensor (Pt/Ni/Cuxxx): -55°C*/-60°C … +180°C
Thermocouple (TE): -55°C*/-60°C … +180°
Silicon-sensor (KTY83): -55°C … +175°C
Silicon-sensor (KTY84): -40°C … +180°C
Thermistor (PTC-NATxxx): -45°C ... +NAT1) + 23 K
Bimetallic switch (BIS): -25°C ... +180°C
*Ambient temperature -55°C just for PR-SPA-EX-WKF version corrugated or closed
by rolling bead
Resistance sensor
(Pt/Ni/Cuxxxxx) Material: Platinum (Pt) / Nickel (Ni) / Copper (Cu)
Nominal value: 5 …2000 Ωat [0°C]
Tolerance class: according to respective standard
Measuring circuits: 1 or 2
Mode of connection: 2-, 3- or 4-wire circuit
Measuring current: 0.3 ... 1 mA (chip)
Self-heating: 0.4 K/mW at 0°C
Operating
temperature2)3): -55°C/-60°C …+180°C
Thermocouple (TE) Measuring circuits: 1 or 2
Max. voltage: 1.5 V
Max. current: 100 mA
Max. power: 25 mW

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Self-heating: -
Operating
temperature2)3): -55°C/-60°C …+180°C
Silicon-sensor (KTY) Model series: KTY83 KTY84
Measuring circuits: 1 or 2 1 or 2
Nominal value: 1000 Ωat 25°C 1000 Ωat 100°C
Measuring current: 1 mA 2 mA
Max. voltage: 5 V 5 V
Max. power: 6.3 mW 6.3 mW
Self-heating: 0.4 K/mW at 0°C 0.4 K/mW at 0°C
Operating
temperature2): -55°C …+175°C -40°C …+180°C
Thermistor (PTC) Measuring circuits: 1 or 2
NAT1): 60°C …180°C
Max. current: 2 mA
Max. voltage: 2.5 V
Power: 4.7 mW
Self-heating: not relevant because of characteristic curve
Operating
temperature2): -45°C …+180°C
Bimetallic switches (BIS) Type series:
Opener S.01 / C.01 / L.01 S.06 / C.06 / L.06
Closer S.02 / C.02 / L.02 S.08 / C.08 / L.08
Nominal switching
temperature: 60°C ... 200°C 70°C ... 200°C
Operational voltage range
AC/DC up until: 500 V AC / 14 V DC* 500 V AC / 28 DC*
Rated voltage AC: 250 V 250 V
Rated voltage DC: 12 V* 24 V*
Max. switching current AC:
cos φ= 1,0 / cycles 6.3 A / 3000 25.0 A / 2000
cos φ= 0,4 / cycles 7.2 A / 1000
Max. switching current DC:40.0 A / 5000* 40.0 A / 8000*
Rated current AC:
cos φ= 1,0 / cycles 2.5 A / 10000 10.0 A / 10000
cos φ= 0,6 / cycles 1.6 A / 10000 6.3 A / 10000
cos φ= 0,4 / cycles 1.8 A / 10000
High voltage resistance: 2.0 kV 2.0 kV
*just Opener
Dielectric strength Sensor: 0.5 kV / 50Hz, 1min.
Supply line: 0.5 kV / 50Hz, 1min.
Supply line Construction: single litz, hose line
flat hose line
Insulation: Teflon or silicone
Color code: acc. to DIN or resp. customer’s request
Cross section: ≥ AWG 30

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Cable capacitance (Ci): negligible
Cable inductance (Li): negligible
1) NAT= Nominal response temperature
2) Operating temperature using elastomer (depend on used elastomer material) for insulation only ... + 150°C
3) Operating temperature -55°C just by PR-SPA-EX-WKF version corrugated or closed by rolling bead
General hints:
When mounting one has to pay attention that no damage will occur to the supply line and the insulation of
the sensor. The supply line must be installed strain-relieved. Extreme bending load as well as punctual,
mechanical stress to the sensor should be avoided.
The special security hints for the mounting regarding the ATEX approval are fixed in the above-named
ATEX-approval which is available at EPHY-MESS or at www.ephy-mess.de.
7. Type identification
PR-SPA-EX-WKF + variant identification (see point 8)
PR
SPA
EX
Design
depending on
the point of
installation
Version
see 8. Variant identification
WKF: sensor for winding head
EX-certification
Sensor, passive
Product

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8. Variant identification
Version
Customer
standards
(optional)
Measu-
ring
circuits
Sensor
Nominal
value
Tolerance
Wire
circuit
Dimensions
in mm
Supply
line
Sensor
version
(optional)
Addition1)
Screened =abg
Number of isolations
Information about cable
ø= diameter
l= length
2- ,3- or 4-wire circuit for RTD
for TE, KTY, PTC (always 2-wire circuit)
Tolerance class according to DIN - for example:
Class A; B for RTD
Class 1; 2; 3 for TE
In % for KTY, PTC-sensors
100, 500 or 1000 for RTD-Nominal value in [Ω]
J, K … etc. for thermocouple type
83 or 84 for KTY-sensor type
60, 70, 80 … etc. for NAT in [°C]
60, 70, 80 … etc. for NST in [°C]
Pt, Cu or Ni for RTD
TE for thermocouple
KTY for silicon-sensor
EPTC,ZPTC,DPTC for thermistors (single, twin, triple)
BIS for bimetallic switch
"Kombi" for combination of several sensor types
Number of measuring circuits / sensors
Titel of customer standards
SH = Isolated with shrinkable tube
KH = Ceramic sleeve
MH = Metall sleeve
E.g.: SH,1Pt100A3,ø3x20,E1x24/7,1200RD/WH
E.g.: KH,1Pt100A3,ø3x20,E1x24/7,1200RD/WH
E.g.: MH,1Pt100A3,ø3x20,E1x24/7,1200RD/WH
SH
1
Pt
100
A
3
ø3x20
E1x24/7RD/WH
KH
1
Pt
100
A
3
ø3x20
E1x24/7RD/WH
MH
1
Pt
100
A
3
ø3x20
E1x24/7RD/WH
RTD = Resistance thermometer
NAT = Nominal response temperature
NST = Nominal switching temperature
Pt = Platinum
Cu = Copper
Ni = Nickel
1) Addition. E. g.: In KTY also be asked to specify color code and polarity of the line e. g.: YE (+) / GN (-)

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9. Nominal values / characteristics
Nominal values and characteristics for the individual measuring resistors are specified in the following
standards:
Platinum resistance thermometer DIN EN 60751
Nickel resistance thermometer not standardized
Copper resistance thermometer not standardized
Thermocouples (TE) DIN EN 60584
Thermistors (PTC) DIN 44081-82
Silicon sensors (KTY) not standardized
Bimetallic switches (BIS) not standardized
9.1 Circuit and labeling of connecting wires of Pt100 sensors acc. to EN 60751
2- conductor connection
3- conductor connection
4- conductor connection
1 x Pt100 measuring resistor
2 x Pt100 measuring resistors
9.2 Circuit and labeling of connecting wires of thermocouples acc. to DIN EN 60584-3 (excerpt)
Type Color Standard
T BN(BN(+) / WH(-)) EN 60584
J BK(BK(+) / WH(-)) EN 60584
K GN(GN(+) / WH(-)) EN 60584
S OR(OR(+) / WH(-)) EN 60584

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Pt100 measuring resistor
supply unit
9.3 Connection diagram
9.3.1 Connection diagram equipment protection by increased safety
(Principle sketch of thermocouples)
9.3.2 Connection diagram equipment protection by intrinsic safety
(Use of a suitable operating equipment)
Wiesbaden, 23rd of June 2017