Crouzet 84874110 Data Sheet

Temperature control in lifts according to EN81

HT81

HT81-2

HWT81

Part numbers

Product adaptations

Accessories

General characteristics

➜ Temperature control relay for lift service rooms - according to EN81 - 35 mm

■ 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

Function Under/Overtemperature

Nominal voltage (V)
3-phase control -­Part numbers 84874110 84874120 84874130

HT81 HT81-2 HWT81

window mode

➞ 240 V

z

24

Under/Overtemperature
window mode

24 ➞ 240 V

z

Under/Overtemperature
window mode + phase
sequence and failure

24 ➞ 240 V
3 x 208

z

➞ 480 V

a

■ Customisable colours and labels

■ Fixed threshold in the generic measurement range

■ Fixed or adjustable time delay

■ Adjustable fixed hysteresis

Description Code

Removable sealable cover for 35 mm casing 84800001

HT81 HT81-2 HWT81

Inputs and measuring cicuit

Phase control voltage range - - 208 V ➞ 480 V

Phase failure detection with regeneration - - > 30% of the average of

Frequency of measured signal - - 50
Relay drop-out voltage (phase failure) - - 70%
3-phase input resistors - - 600 KΩ

Timing

Maximum response time in the event of a 3-phase fault (ms) - - 500 ms

Output

Type of output 1 single pole changeover

Insulation

Galvanic isolation of power supply/measurement Yes, between power

Nominal insulation voltage IEC 60664-1 250 V 250 V 400 V

relay

supply and PT100
(transformer)
Yes, between power
supply and output
(transformer and relay)
Yes, between PT 100
and output (relay)

2 single pole NO relay 2 single pole NO relay

Yes, between power
supply and PT100
(transformer)
Yes, between power
supply and output
(transformer and relay)
Yes, between PT100 and
output (relay)

(-15% / +10%) *

the 3 phases

➞ 60 Hz ± 1 Hz

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)

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General characteristics

HT81 / HT81-2 / HWT81

Supply

Supply voltage Un
Voltage supply tolerance

24 V

-15%, + 10% in

-10%, +10% in

Operating range

20.4 V

21.6 V ➞ 264 V

Polarity with DC voltage No

a

supply voltage frequency

Power consumption at Un

50 / 60 Hz ±10%

3.5 VA in

Immunity from micro power cuts 10 ms

Inputs and measuring cicuit

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 treshold 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

Max. breaking current
Min. breaking current
Electrical life (number of operations)
Breaking capacity (resistive)

250 V

z

5 A
10 mA / 5 V
1 x 10

1250 VA
Maximum rate 360 operations/hour at full load
Operating categories acc. to IEC 60947-5-1 AC 12, AC 13, AC 14, AC 15, DC 12, DC 13, DC 14
Mechanical life (operations)

30 x 10

Insulation

Insulation coordination (IEC 60664-1 / 60255-5) Overvoltage category III: degree of pollution 3
Rated impulse withstand voltage IEC 60664-1/60255-5 4 kV (1.2 / 50 µs)
Dielectric strength IEC 60664-1/60255-5

Insulation resistance IEC 60664-1 / 60255-5

2 kV

> 100 MΩ - 500 V

General characteristics

Display power supply Green LED
Display temperature Yellow LED (HWT81)
Display phases 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
Material: enclosure plastic type VO to UL94 standard Incandescent wire test according to IEC 60695-2-11 & NF EN 60695-2-11
Protection (IEC 60529) Terminal block: IP 20

IP 30 casing
Weight 121 g
Connecting capacity IEC 60947-1

Max. tightening torques IEC 60947-1 0.6
Operating temperature IEC 60068-2 -20
Storage temperature IEC 60068-2 -40

Rigid: 1 x 4

1 x 11 AWG - 2 x 14 AWG

Flexible with ferrules: 1 x 2.5

1 x 14 AWG - 2 x 16 AWG

➞ 1 Nm / 5.3 ➞ 8.8 Lbf.In
➞ +50°C
➞ +70°C

Humidity IEC 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 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

Certifications UL, CSA, GL

Emission EN 61000-6-4/EN 61000-6-3

IEC 61000-6-4/IEC 61000-6-3

Emission EN 55022 class B

pending
Conformity with environmental directives RoHS, WEEE

Comments

* 3-phase mains with earth

➞ 240 V

➞ 264 V

a

/0.6 W in

z

c

4

a

6

a

50 Hz 1 min.

2

- 2 x 2.52 mm2

z

a

c

a
c

c

c

2

- 2 x 1.52 mm

2

63