Temperature control relay for lift service rooms
-
according to EN81
-
35 mm HWT81 Part number 84874130
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
Specifications
Type
Function
Nominal voltage (V)
3-phase control
84874130
HWT81
Under/Overtemperature window mode + phase sequence and failure
24→240VAC/DC
3x208→480VAC
Supply
Supply voltage Un
24V→240VAC/DC
Voltage supply tolerance
-15 %, + 10 % AC
-10 %, +10 %
DC
Operating range
20,4V→264VAC
21,6V→264VDC
Polarity with DC voltage
No
AC supply voltage frequency
50 / 60 Hz
±
10 %
Power consumption at Un
3.5 VA in AC/0.6 W in DC
Immunity from micro power cuts
10 ms
Inputs and measuring circuit
Low temperature measurement selection
-
1 °C, 1 °C, 3 °C, 5 °C, 7 °C, 9 °C, 11 °C
High temperature measurement selection
34 °C, 36 °C, 38 °C, 40 °C, 42 °C, 44 °C, 46 °C
Temperature measurement input resistance
1330
Ω
Fixed hysteresis
2 °C
Display precision
±
2 %
Max. length of Pt100 probe cables
10 m
Timing
Delay on thresold crossing
1→10s
Display precision
0, + 10 %
Reset time
8 s
Delay on pick
-up
200 ms
Maximum response time on disappearance of fault
3.5 s for a temperature fault
500 ms for a phase fault
Output
Type of contacts
No cadmium
Maximum breaking voltage
250 V AC/DC
Max. breaking current
5 A AC/DC
Min. breaking current
10 mA / 5 V DC
Electrical life (number of operations)
1 x 104
Breaking capacity (resistive)
1250 VA AC
Maximum rate
360 operations/hour at full load
Operating categories acc. to IEC/EN 60947
-5-1
AC 12, AC 13, AC 14, AC 15, DC 12, DC 13, DC 14
Mechanical life (operations)
30 x 106
Insulation
Insulation coordination (IEC/EN 60664
-1)
Overvoltage category III : degree of pollution 3
Rated impulse withstand voltage (IEC/EN 60664
-1)
4 kV (1,2 / 50
μ
s)
Dielectric strength (IEC/EN 60664
-1)
2 kV AC 50 Hz 1 min.
Insulation resistance (IEC/EN 60664
-1)
> 100 M
Ω
-
500 V DC
General characteristics
Display power supply
Green LED
Temperature indication
Yellow LED (HWT81)
"Phase" indication
Yellow LED (HWT81)
High threshold relay
Yellow LED (HT81, HT81
-2)
Low threshold relay
Yellow LED (HT81, HT81
-2)
Casing
35 mm
Mounting
On 35 mm symmetrical DIN rail, IEC/EN 60715
Mounting position
All positions
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
23/06/2014 www.crouzet.com
Accessories
Overview
Temperature control relays for lift machine rooms are designed for monitoring the temperature between 5 °C and 40 °C according to standard EN81.
Material : enclosure plastic type VO to UL94 standard
Incandescent wire test according to IEC 60695-2-
11 & NF EN 60695
-2-11
Protection (IEC/EN 60529)
Terminal block : IP 20
IP 30 casing
Weight
121 g
Connecting capacity IEC/EN 60947
-1
Rigid : 1 x 4
2 - 2 x 2.52
mm
2
1 x 11 AWG - 2 x 14 AWG
Flexible with ferrules : 1 x 2.52 - 2 x 1.52
mm
2
1 x 14 AWG - 2 x 16 AWG
Max. tightening torques
IEC/EN 60947
-1
0,6→1Nm/5,3→8,8Lbf.In
Operating temperature IEC/EN 60068
-2
-
20→+50°C
Storage temperature IEC/EN 60068
-2
-
40→+70°C
Humidity IEC/EN 60068
-2-30
2 x 24 hr cycle 95 % RH max. without condensation 55 °C
Vibrations according to IEC/EN60068
-2-6
10→150Hz,A=0.035mm
Shocks IEC/EN 60068
-2-6
5 g
Standards
Marking
CE (LVD) 73/23/EEC
-
EMC 89/336/EEC
Product standard
NF EN 60255
-
6 / IEC 60255
-
6 / UL 508 / CSA C22.2 N°14 / EN 81
-1
Electromagnetic compatibility
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
Certifications
UL, CSA, GL
Conformity with environmental directives
RoHS, WEEE
Inputs and measuring circuit
Phase control voltage range
208V→480V(-15 % / +10 %) *
Phase failure detection with regeneration
> 30 % of the average of the 3 phases
Frequency of measured signal
50→60Hz
±
1 Hz
Relay drop
-out voltage (phase failure)
70 %
3-phase input resistors
600 K
Ω
Timing
Maximum response time in the event of a 3
-phase fault
(ms)
500 ms
Output
Type of output
2 single pole NO 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 power supply and 3-phase network (transformer) Yes, between 3-phase network and output (relay)
No, between 3-phase network and PT100 (leakage current limited by several high-value resistors)
Yes, between PT 100 and output (relay)
Nominal insulation voltage
400 V
Comments
Description
Code
Removable sealable cover for 35 mm casing
84800001
Principles
Principles
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
23/06/2014 www.crouzet.com
HWT81 operating principle :
As long as the temperature controlled by the PT100 stays between the two preset thresholds on the front face, the temperature relay is closed.
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 temperature LED (R1)
flashes. At the end of the time delay, if the temperature still exceeds the preset threshold, the output relay opens and the yellow LED is extinguished.
The output relay R1 closes instantaneously when the temperature returns within the window of the two preset thresholds on the front face plus or minus the fixed hysteresis.
The unit also monitors correct sequencing of phases L1, L2 and L3 of the 3-phase network and the total phase failure in the event of phase regeneration (<70 %).
After a time delay on pick-up (t) and as long as the presence and sequence of the phases are correct, relay R2 and the R2 "phase" LED are active. When a fault appears, the "phase" relay opens
and the R2 "phase" LED is extinguished instantly (response time from the appearance of a fault).
On disappearance of the fault, both relay R2 and the phase control LED are activated (response time from the disappearance of a fault). See "Phase failure and phase sequence" curve on page
If the PT100 probe is wired incorrectly (missing or short-circuited), output relay R1 opens and the yellow R1 LED flashes.
mm
N
o
Legend
High threshold
Low threshold
Hysteresis
Monitored temperature
Threshold crossing delay adjustable on front face (Tt)
Dimensions (mm)
Connections
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
23/06/2014 www.crouzet.com
HWT81
N
o
Legend
Fusible ultra rapide 1 A ou coupe circuit
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
23/06/2014 www.crouzet.com
