CROUZET CONTROL
Relays HWTM and HWTM2 monitor production disturbances on 3-phase networks and temperatures in motors with integrated PTC sensors. The control functions
“phase and temperature” are independent of one another.
Control of 3-phase networks (208-480 V) concerns phase sequence L1, L2, L3 and phase interruptions. Complete phase interruptions are detected, even during regeneration
(returned voltage U is measured at <0.7 x Un).
The temperature control can encompass up to 6 PTC sensors (resistance with positive temperature coefficient) that are connected in series between T1 and T2.
A fault is detected when the resistance in the temperature sensor circuit exceeds 3100 Ω. Returns to normal mode when the resistance falls below 1650 Ω.
The result of the control is specified by the “temperature relay's” position – contact NO 11-14 drops out in the event of a fault. A break in the temperature sensor circuit has the same effect
as for high temperature (the resistance exceeds 3100 Ω) and is thus interpreted as a fault). A complete short circuit in the temperature sensor(s) is detected
when the resistance falls below 15 Ω ± 5 %, which is considered as a fault.
HWTM2 has a rotary switch that is used to set the function position for the temperature control, with or without memory. In the “with memory” position,
the temperature relay is blocked in the open position when a fault is detected. As soon as the temperature is correct again, the relay can be reset, either by pressing the “Test/Reset” button
at the front (at least 50 ms) or by closing the floating contact between Y1 and T1 (without a load connected in parallel). Can also be easily
reset by switching off the supply voltage to the relay.
With HWTM2, a test for overheating can be easily made by pressing the test button at the front marked “Test/Reset”. The yellow LED turns off and the relay drops out.
This test is made when the temperatures is normal. Green LED (Un) indicates supply voltage OK. Yellow LED (R) indicates active relay output.
Approvals | CSA, GL, RoHS, UL |
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Boundary limit | 3 100 Ω ±10 % |
Breaking capacity | 5A, 250V AC/DC |
External reset | Fault Latching and reset/test |
Function | Phase Sequence, Phase Failure, Motor Temperature |
IP class connection | IP20 |
IP class housing | IP30 |
Measurement range | 3x208 - 3x480V AC |
Output | 2x Relay |
Resistance of temperature sensor at 20 ° C max | 1500 Ω |
Restriction limit | 1 650 Ω ±10 % |
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Storage temperature max | 70 °C |
Storage temperature min | -40 °C |
Supply voltage | 24-240V ac/dc |
Temperature operational max | 50 °C |
Temperature operational min | -20 °C |
Time delay startup | 0,5 s |
Time delay when exceeding the limit value | 0,3 s |
Weight | 107 g |
Relays HWTM and HWTM2 monitor production disturbances on 3-phase networks and temperatures in motors with integrated PTC sensors. The control functions
“phase and temperature” are independent of one another.
Control of 3-phase networks (208-480 V) concerns phase sequence L1, L2, L3 and phase interruptions. Complete phase interruptions are detected, even during regeneration
(returned voltage U is measured at <0.7 x Un).
The temperature control can encompass up to 6 PTC sensors (resistance with positive temperature coefficient) that are connected in series between T1 and T2.
A fault is detected when the resistance in the temperature sensor circuit exceeds 3100 Ω. Returns to normal mode when the resistance falls below 1650 Ω.
The result of the control is specified by the “temperature relay's” position – contact NO 11-14 drops out in the event of a fault. A break in the temperature sensor circuit has the same effect
as for high temperature (the resistance exceeds 3100 Ω) and is thus interpreted as a fault). A complete short circuit in the temperature sensor(s) is detected
when the resistance falls below 15 Ω ± 5 %, which is considered as a fault.
HWTM2 has a rotary switch that is used to set the function position for the temperature control, with or without memory. In the “with memory” position,
the temperature relay is blocked in the open position when a fault is detected. As soon as the temperature is correct again, the relay can be reset, either by pressing the “Test/Reset” button
at the front (at least 50 ms) or by closing the floating contact between Y1 and T1 (without a load connected in parallel). Can also be easily
reset by switching off the supply voltage to the relay.
With HWTM2, a test for overheating can be easily made by pressing the test button at the front marked “Test/Reset”. The yellow LED turns off and the relay drops out.
This test is made when the temperatures is normal. Green LED (Un) indicates supply voltage OK. Yellow LED (R) indicates active relay output.
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Here, our customer requires control boxes for electricity metering systems. We leveraged our expertise to deliver easy-to-install, ready-to-use assemblies. We look forward to creating more of these bespoke control boxes for our customer.
This blog talks all things DC circuit protection including the key components: electronic circuit breakers, fuses and current monitoring devices. As well as how to choose the right protection.
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To help experience the capabilities of Z+F machines first-hand, we provide an in-depth demonstration and workshop. These sessions will show the machines in action and allow you to understand their features and gain valuable insight into their operation and benefits.
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Parts | External reset | Price | ||
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Phase Monitor Relay HWTM2 3 x 208-480V ac
Art:
84873028
Copied
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Fault Latching and reset/test
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Phase Monitor Relay HWTM 3 x 208-480V ac
Art:
84873027
Copied
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N/A
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