Temperature control relay for lift service rooms - according to EN81 - 35 mm HT81 Part number 84874110
Control relay designed to monitor the temperature in lift machine rooms in accordance with standard EN81
PT100 input
Adjustable control between 5 °C and 40 °C
Independent setting of high and low thresholds
Built-in phase control option
Part numbers
Type
84874110
HT81
Function
Under/Overtemperature window mode
Nominal voltage (V)
24 →240 V AC/DC
3-phase control
-
Specifications
Supply
Supply voltage Un
Voltage supply tolerance
Operating range
Polarity with DC voltage
AC supply voltage frequency
Power consumption at Un
Immunity from micro power cuts
24 V →240 V AC/DC
-15 %, + 10 % AC
-10 %, +10 % DC
20,4 V →264 V AC
21,6 V →264 V DC
No
50 / 60 Hz ±10 %
3.5 VA in AC/0.6 W in DC
10 ms
Inputs and measuring circuit
Low temperature measurement selection
High temperature measurement selection
Temperature measurement input resistance
Fixed hysteresis
Display precision
Max. length of Pt100 probe cables
-1 °C, 1 °C, 3 °C, 5 °C, 7 °C, 9 °C, 11 °C
34 °C, 36 °C, 38 °C, 40 °C, 42 °C, 44 °C, 46 °C
1330
Ω
2 °C
±2%
10 m
Timing
Delay on thresold crossing
Display precision
Reset time
Delay on pick-up
Maximum response time on disappearance of fault
1 →10 s
0, + 10 %
8s
200 ms
3.5 s for a temperature fault
500 ms for a phase fault
Output
Type of contacts
Maximum breaking voltage
Max. breaking current
Min. breaking current
Electrical life (number of operations)
Breaking capacity (resistive)
Maximum rate
Operating categories acc. to IEC/EN 60947-5-1
Mechanical life (operations)
No cadmium
250 V AC/DC
5 A AC/DC
10 mA / 5 V DC
1 x 10
4
1250 VA AC
360 operations/hour at full load
AC 12, AC 13, AC 14, AC 15, DC 12, DC 13, DC 14
30 x 10
6
Insulation
Insulation coordination (IEC/EN 60664-1)
Rated impulse withstand voltage (IEC/EN 60664-1)
Dielectric strength (IEC/EN 60664-1)
Insulation resistance (IEC/EN 60664-1)
Overvoltage category III : degree of pollution 3
4 kV (1,2 / 50
μs)
2 kV AC 50 Hz 1 min.
> 100 MΩ - 500 V DC
General characteristics
Display power supply
Temperature indication
"Phase" indication
High threshold relay
Low threshold relay
Casing
Mounting
Mounting position
Green LED
Yellow LED (HWT81)
Yellow LED (HWT81)
Yellow LED (HT81, HT81-2)
Yellow LED (HT81, HT81-2)
35 mm
On 35 mm symmetrical DIN rail, IEC/EN 60715
All positions
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
23/06/2014
Material : enclosure plastic type VO to UL94 standard
Protection (IEC/EN 60529)
Weight
Connecting capacity IEC/EN 60947-1
Incandescent wire test according to IEC 60695-2-11 & NF EN 60695-2-11
Terminal block : IP 20
IP 30 casing
121 g
Rigid : 1 x 4
2
- 2 x 2.5
2
mm
2
1 x 11 AWG - 2 x 14 AWG
Flexible with ferrules : 1 x 2.5
2
- 2 x 1.5
2
mm
2
1 x 14 AWG - 2 x 16 AWG
0,6 →1 Nm / 5,3 →8,8 Lbf.In
-20 →+50 °C
-40 →+70 °C
2 x 24 hr cycle 95 % RH max. without condensation 55 °C
10 →150 Hz, A = 0.035 mm
5g
www.crouzet.com
Max. tightening torques IEC/EN 60947-1
Operating temperature IEC/EN 60068-2
Storage temperature IEC/EN 60068-2
Humidity IEC/EN 60068-2-30
Vibrations according to IEC/EN60068-2-6
Shocks IEC/EN 60068-2-6
Standards
Marking
Product standard
Electromagnetic compatibility
CE (LVD) 73/23/EEC - EMC 89/336/EEC
NF EN 60255-6 / IEC 60255-6 / UL 508 / CSA C22.2 N°14 / EN 81-1
Immunity EN 61000-6-2/IEC 61000-6-2
Emission EN 61000-6-4/EN 61000-6-3
IEC 61000-6-4/IEC 61000-6-3
Emission EN 55022 class B
UL, CSA, GL
RoHS, WEEE
Certifications
Conformity with environmental directives
Inputs and measuring circuit
Phase control voltage range
Phase failure detection with regeneration
Frequency of measured signal
Relay drop-out voltage (phase failure)
3-phase input resistors
-
-
-
-
-
Timing
Maximum response time in the event of a 3-phase fault
(ms)
-
Output
Type of output
1 single pole changeover relay
Insulation
Galvanic isolation of power supply/measurement
Yes, between power supply and PT100 (transformer)
Yes, between power supply and output (transformer and relay)
Yes, between PT 100 and output (relay)
250 V
Nominal insulation voltage IEC/EN 60664-1
Comments
Accessories
Description
Removable sealable cover for 35 mm casing
Code
84800001
Principles
Overview
Temperature control relays for lift machine rooms are designed for monitoring the temperature between 5 °C and 40 °C according to standard EN81.
Principles
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
23/06/2014
www.crouzet.com
HT81 operating principle :
As long as the temperature controlled by the PT100 stays between the two preset thresholds on the front face, the output relay is closed and the yellow LEDs are lit.
When the temperature exceeds one of the preset thresholds on the front face (upper or lower threshold), the preset time delay on the front face (Tt) is activated. The yellow LED corresponding to
the threshold exceeded (upper or lower) flashes.
At the end of the time delay, if the temperature still exceeds one of the preset thresholds, the output relay opens and the yellow LED corresponding to the threshold is extinguished.
The output relay closes instantaneously (at about the response time for disappearance of a fault) when the temperature returns within the window of the two preset thresholds on the front face
plus (or minus) the fixed hysteresis.
If the PT100 probe is wired incorrectly (missing or short-circuited) the output relays opens and all 3 LEDs flash.
N
o
Legend
High threshold
Low threshold
Hysteresis
Monitored temperature
Threshold crossing delay adjustable on front face (Tt)
Dimensions (mm)
mm
Connections
HT81
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
23/06/2014
www.crouzet.com
N
o
Legend
1 A fast-blow fuse or cut-out
Product adaptations
Customisable colours and labels
Fixed threshold in the generic measurement range
Fixed or adjustable time delay
Adjustable fixed hysteresis
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
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