HWTM

KEY FEATURES

  • 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 (HWTM2)
  • LED status indication
FunctionsNominal voltage (V)Phase control voltage rangeCode
Phase sequence, phase failure, motor temperature via PTC probe, test, memory24 →240 V ∿/⎓3 x 208 →3 x 480 V ∿84873027

Specifications


Supply voltage Un 24 V →240 V ∿/⎓
Voltage supply tolerance -15 % / +10 %
Operating range 20,4 V →264 V ∿/⎓
Polarity with ⎓ voltage No
∿ supply voltage frequency 50 / 60 Hz ± 10 %
Galvanic isolation of power supply/measurement No (current limiting)
Power consumption at Un 4 VA in ∿/0.5 W in ⎓
Immunity from micro power cuts 20 ms / 20,4 V

Measurement ranges 3 x 208 →3 x 480 V∿ *
Operating range 176 →528 V∿
Frequency of measured signal 50 / 60 Hz ±10 %
Input resistance 602 KΩ / line
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 %

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 ∿
Delay on pick-up 500 ms

Type of output 2 NO relays
Type of contacts No cadmium
Maximum breaking voltage 250 V ∿/⎓
Max. breaking current 5 A ∿/⎓
Min. breaking current 10 mA / 5 V ∿/⎓
Electrical life (number of operations) 1 x 104
Breaking capacity (resistive) 1250 VA ∿
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

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 μs)
Dielectric strength (IEC/EN 60664-1) 2 kV AC 50 Hz 1 min.
Insulation resistance (IEC/EN 60664-1) > 500 MΩ / 500 V ⎓

"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 42 - 2 x 2.52 mm2 1 x 11 AWG - 2 x 14 AWG Flexible with ferrules : 1 x 2.52 - 2 x 1.52 mm2 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

Product standard IEC/EN 50178
Electromagnetic compatibility (EMC) IEC/EN 61000-6-1, IEC/EN 61000-6-2, IEC/EN 61000-6-3, IEC/EN 61000-6-4
Certifications CE, UL, CSA, GL
Conformity with environmental directives RoHS

* 3-phase mains with earth

Technical sketches

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.

HWTM - Phase failure and phase sequence

HWTM - Phase failure and phase sequence
Legend
1-
Phase L1
2-
Phase L2
3-
Phase L3
4-
Relay R2
5-
30 % of Un
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. As soon as it is verified that the resistance of the thermal detector is between 15 and  3,100Ω, 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  3,100Ω, the contact of the output relay closes again and, subject to the result of the phase control check, LED''R1''lights up.

HWTM - Temperature

HWTM - Temperature
Legend
1-
Resistance between terminals T1 and T2
2-
Relay R1

HWTM

HWTM

HWTM

HWTM
Legend
1-
1 A fast-blow fuse or cut-out
PH RMC2 HWUA

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