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WTRD1 Winding Protection relay
| Introduction: |
| It is a Winding Protection relay based on thermistor (PTC) . It offers protections against Over heating of the windings of pumps, motors, transformers, alternators etc. & sense the temperature with the help of PTC thermistor. It can be used with single or triple PTC & also with 6 or 9 PTCs as a special case. It can used for AC/DC motor, generator, transformer, winding protection against over heating of SCRs & Bus Bars. | |
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| Features: |
· Monitors Overload & Phase Loss, Phase Sequence by sensing Overheating of Windings.
· Operates with Embedded PTC sensors in the motor / transformer windings.
· Suitable for any PTC Thermistor.
· Sensor Short / Open Condition Monitoring.
· 1 CO output rated 230V AC / 5A (Resistive)
· Auto (Optional Manual) Reset.
· DIN Rail mounted Enclosure.
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| Application Areas: |
| Injection Molding machines Machine tools Crane & hoist motors Compressors & fan motors | |
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| Technical Specifications: |
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Specifications |
| 1 |
Supply Voltage |
Auxiliary 48 / 110 / 220-240 24 V DC ±10% |
| 2 |
Output Contacts |
1 CO |
| 3 |
Trip Setting |
Thermistor Sensor Healthy 40 ohm - 4 K ohm; Thermistor Sensor Trip 4.1 K ohm - 5.5 K ohm; Thermistor Sensor Open 5.6 K ohm & above; Reset 1.5 K ohm - 1.8 K ohm for 1/3 PTC 2.2 K ohm - 2.8 K ohm for 6/9 PTC |
| 4 |
Trip time delay |
Less than 2 secs. |
| 5 |
Resetting Mode |
Auto / Manual (optional) |
| 6 |
Dimensions (mm) |
Overall (L x W x D) 76 x 30.5 x 117.5; Mounting (L x W) 68 mm centre to centre |
| 7 |
Weight |
300 gms. | | |
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