Motor phase and temperature control relay
-
35 mm HWTM Part number 84873027
Control of 3-phase networks : phase sequence, phase failure
Multi
-voltage
True RMS measurement
Motor temperature control via PTC probes
With line break or probe short-circuit detection
Version with fault latching function and reset / test
LED status indication
Part numbers
Specifications
Type
Functions
Nominal voltage (V)
Phase control voltage range
84873027
HWTM
Phase sequence, phase failure, motor temperature via PTC probe, test, memory
24→240VAC/DC
3x208→3x480VAC
Supply
Supply voltage Un
24V→240VAC/DC
Voltage supply tolerance
-15 % / +10 %
Operating range
20,4V→264VAC/DC
Polarity with DC voltage
No
AC supply voltage frequency
50 / 60 Hz
±
10 %
Galvanic isolation of power supply/measurement
No (current limiting)
Power consumption at Un
4 VA in AC/0.5 W in DC
Immunity from micro power cuts
20 ms / 20,4 V
Inputs and measuring circuit
3-phase control
Measurement ranges
3x208→3x480VAC*
Operating range
176→528VAC
Frequency of measured signal
50 / 60 Hz
±
10 %
Input resistance
602 K
Ω
/
line
Contrôle thermique
Maximum voltage of heat detection circuit
3.6 V (T1-
T2 open)
Short-circuit current
7 mA (T1, T2 short-circuited)
Maximum heat detector resistance at 20 °C
1500
Ω
Trip threshold
3100
Ω
±
10 %
Reset threshold
1650
Ω
±
10 %
Short-circuit detection range
0→15
Ω
±
5
Ω
Resistance measurement temperature drift
±
0,1 % / °C max.
Repetition accuracy with constant parameters
±
0,5 %
Timing
Delay on thresold crossing
300 ms max. (phase)
300 ms typical (temperature)
Y1 input response time (Y1-
T1 contact) and PB
typically 50 ms
Reset time
10 s max. at 264 V AC
Delay on pick
-up
500 ms
Output
Type of output
2 NO relays
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 AC/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
AC12, AC13, AC14, AC15, DC12, DC13, DC14
Mechanical life (operations)
30 x 106
Insulation
Nominal insulation voltage IEC/EN 60664
-1
400 V
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.
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
Relays HWTM and HWTM2 check the availability of the 3
-phase network and the temperature of the motors using integrated PTC probes.
The "phase" and "temperature" control functions are independent of one another.
The 3
-phase (208 to 480 V) network control verifies the sequence of phases L1, L2, L3 and their presence :
- the complete failure of a phase is detected, also in the event of regeneration (U measured < 0.7 x Un).
The result of the check is indicated by the status of the "phase" output relay. NO contact 21-24 will be open in case of fault.
The temperature control accepts up to 6 PTC probes (positive temperature coefficient resistor) wired in series between terminals T1 and T2.
A fault is reported if the resistance of the thermal detector circuit exceeds 3100
Ω
.
Return to normal is verified when the resistance falls below 1650
Ω
.
The result of the check is indicated by the status of the "temperature" output relay. NO contact 11-14 will be open in case of fault.
Opening of the thermal detector circuit has the same effect as high temperature (resistance exceeding 3100
Ω
) and is therefore interpreted as a fault.
Total short-circuit of the thermal probe (s), detected when resistance is less than 15
Ω
±
5
Ω
is treated as a fault.
Insulation resistance (IEC/EN 60664
-1)
> 500 M
Ω
/
500 V DC
General characteristics
"Phase" relay status indication
Yellow LED
"Temperature" relay status indication
Yellow LED
Display power supply
Green LED
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/EN 60529)
Terminal block : IP20
Casing : IP30
Weight
107.1 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 / CEI 60034
-11-
2 / UL 508 / CSA C22.2 N°14
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
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
Control of 3-phase network
As soon as the phase sequence (L1 L2 L3) and phase amplitude symmetry (D < 30 %) are considered correct, the contact of the output relay closes and, subject to the result of the temperature
check, LED''R2''lights up.
In case of total failure or a drop in the amplitude of a phase (absence of phase with regeneration) or inversion of the phase sequence, the contact of the output relay opens and LED "R2" is
extinguished.
Temperature control without latching
As soon as it is verified that the resistance of the thermal detector is between 15 and 3,100
Ω
, the contact of the output relay closes and, subject to the result of the phase control check,
LED''R1''lights up.
If the resistance of the thermal detector circuit exceeds 3,100
Ω
, the output relay opens and LED "R1" is extinguished. After an overheating fault, the resistance must fall below 1,650
Ω
for the
output relay contact to reclose and, subject to the result of the phase check, LED "R1" to light up.
If the resistance falls below 15
Ω
(short-circuit), the output relay opens and LED "R1" is extinguished. As soon as it returns to between 15 and 3,100
Ω
, the contact of the output relay closes again
and, subject to the result of the phase control check, LED''R1''lights up.
Control of 3-phase network
As soon as the phase sequence (L1 L2 L3) and phase amplitude symmetry (D < 30 %) are considered correct, the contact of the output relay closes and, subject to the result of the temperature
check, LED''R2''lights up.
In case of total failure or a drop in the amplitude of a phase (absence of phase with regeneration) or inversion of the phase sequence, the contact of the output relay opens and LED "R2" is
extinguished.
Temperature control without latching
As soon as it is verified that the resistance of the thermal detector is between 15 and 3,100
Ω
, the contact of the output relay closes and, subject to the result of the phase control check,
LED''R1''lights up.
If the resistance of the thermal detector circuit exceeds 3,100
Ω
, the output relay opens and LED "R1" is extinguished. After an overheating fault, the resistance must fall below 1,650
Ω
for the
output relay contact to reclose and, subject to the result of the phase check, LED "R1" to light up.
If the resistance falls below 15
Ω
(short-circuit), the output relay opens and LED "R1" is extinguished. As soon as it returns to between 15 and 3,100
Ω
, the contact of the output relay closes again
and, subject to the result of the phase control check, LED''R1''lights up.
N
o
Legend
Phase L1
Phase L2
Phase L3
Relay R2
30 % of Un
Principles
N
o
Legend
Resistance between terminals T1 and T2
Relay R1
Dimensions (mm)
HWTM
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
23/06/2014 www.crouzet.com
Connections
HWTM
N
o
Legend
1 A fast-blow fuse or cut-out
Product adaptations
Customisable colours and labels
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
23/06/2014 www.crouzet.com
