Temperature detector P
Temperature, Current, Time under Control
very compact size
mould-proof
housing
excellent thermal
conduction
characteristics due
Area of Application
The temperature detector P
is used wherever protection
against overtemperature is
required. Specific applications
include: protection of primary
windings in transformers,
winding protection in small
electric motors, and general
temperature protection of small
electric equipments.
Circuit diagram
Configuration examples
system and thereby interrupting
the electric circuit of the device
to be protected.
After cooling down and reaching
the closing temperature T E , the
bimetal disk will automatically
return into its original position
and thus make the contact. The
electric circuit is closed again.
to homogenous
constructional size
good temperature
sensitivity
fast response time
Function
The temperature detector P
operates independent from any
current supply. Temperature
detection is effected by means
of a bimetal disk which was first
dimensioned in accordance with
the required cut-off tem-
perature T A . When this fixed
cut-off temperature T A is
reached, this bimetal disk will
snap over, breaking a contact
Functional diagram
TA : Cut-off temperature
TE : Closing temperature
I
: Current
Technical Specifications Temperature detector P
Breaking capacity:
Min. current:
Switching temperature:
Max. breaking capicity:
Switching differential:
Type of action:
250 V; 2,5 (1,6) A / 50 Hz
20 mA
40°C – 150°C,
(±5 or ±10), in 5 Kelvin steps
2,5 A cos
Φ
1,00 / 250 V, 150°C
4,0 A cos
Φ
0,45 / 250 V, 135°C
10 K ... 60 K depending
on the cut-off temperature
2.B (max. drift ±5 K)
Dimensions P8
alternativ:
P5 housing type:
L
4,0 x
W
8,0 x
H
16,0
P1 housing type:
L
3,6 x
W
8,0 x
H
14,5
max. ambient temperature:
160°C / 200°C, 1 minute
Approvals:
VDE (EN 60730)
UL 2111, conform to RoHS
Its rectangular homogenous con-
structional size provides excellent
thermal conduction characteristics.
The housing is resistant against
temperatures (permanent tem-
perature: 160°C), with a temporary
increase in temperature up to
200°C max. being permissible for
a short period only.
The standard version is equipped
with 100 mm long (length of
stripped isolation: 10 mm)
insulated leads or wire connection
(AWG 24).
Special leads or wire (larger diame-
ter to AWG 22) or different lengths
available on request.
Technical Data
The housing of this switch consists
of a single part bag housing which
is closed at its end by resin
(P8 housing type); this makes the
switch mould-proof. This mould-
proof switch may thus also be used
in "tough" environments subject
to the detrimental influences
of humidity or dirt. Alternative
housing types: unsealed version
(P5) or plate bar version (P1).
All housing types are voltage-free.
Due to its constructional size the P
switch is one of the most compact
thermostats available. This ensures
a very fast response rate.
Accessories
Mounting brackets
Mounting clips
Type reference P switch
(temperature detector with automatic reset function)
P 8 X - XXX - XX - XXX
Length of leads/wires
Standard = 100 mm
temperature tolerance in K
(± 5/10 K)
Cut-off temperature in °C
40,45,50...150°C
Connection type:
2 = insulated leads
3 = insulated wires
•
•
•
Example for type reference:
P 8 2 – 125 – 05 – 100
temperature detector
insulated lead (standard AWG 24)
125°C cut-off temperature
tolerance ±5 K
100 mm lead length
(10 mm stripped length)
8 = sealed housing
Limitor GmbH
Temperature, Current, Time under Control
Phone +49(0)7181/48390-0
Fax
+49(0)7181/48390-10
info@limitor.de
www.limitor.de
Dieselstrasse 22
D-73660 Urbach
manufactured: 05.03.2013 subject to change
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