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31DRPT220 – PTC PROTECT RELAY DRPT 220/230/240VAC
Lovato 31DRPT220 is a 220–240 V AC 50/60 Hz PTC thermistor motor protection relay with manual or automatic reset, two changeover auxiliary contacts and 35 mm DIN rail mounting.
£154.72
Why Choose the Lovato 31DRPT220 Thermistor Protection Relay?
The Lovato 31DRPT220 is a PTC thermistor motor protection relay designed for temperature-based protection of motors and other compatible electrical equipment. Operating from a 220–240 V AC, 50/60 Hz supply, it provides a dedicated solution for monitoring PTC thermistors incorporated into motor windings.
Part of the Lovato DRPT thermistor protection relay range, the 31DRPT220 supports selectable manual or automatic reset and includes a test button for functional checking. Two changeover auxiliary contacts provide signalling and control capability for integration into industrial motor control circuits.
The relay is designed for standard 35 mm DIN rail mounting and provides IP20 frontal protection. With a 250 V rated insulation voltage between supply, inputs and outputs and a 4 kV rated impulse withstand voltage, it is suitable for integration into industrial electrical control panels.
Key Advantages
- Dedicated PTC thermistor motor protection relay.
- 220–240 V AC, 50/60 Hz rated supply.
- Selectable manual or automatic reset.
- Integrated test button for functional checking.
- Two changeover auxiliary contacts for control and signalling.
- Standard 35 mm DIN rail mounting.
- IP20 frontal protection.
- Can be installed in any normal operating position.
Key Features
- Lovato DRPT thermistor protection relay.
- 220–240 V AC rated operational voltage.
- 50/60 Hz operating frequency.
- Manual or automatic reset mode.
- Test button.
- Two changeover auxiliary contacts.
- 250 V rated insulation voltage between supply, inputs and outputs.
- 4 kV rated impulse withstand voltage.
- 250 V auxiliary rated operational voltage.
- Screw terminals.
- Maximum flexible conductor section of 1.5 mm².
- 35 mm DIN rail fixing.
- IP20 frontal protection.
- Conforms to IEC/EN 60255-5.
PTC Thermistor-Based Motor Protection
PTC thermistor protection relays monitor temperature-sensitive thermistors installed within motors or other protected equipment. When the thermistor circuit indicates an excessive temperature condition, the protection relay can change the state of its output contacts so the associated control system can respond.
The Lovato 31DRPT220 combines PTC thermistor monitoring with manual or automatic resetting, a test function and two changeover auxiliary contacts. Its 220–240 V AC supply and standard 35 mm DIN rail mounting make it suitable for integration into industrial motor control and protection systems.
Typical Applications
- PTC thermistor-based electric motor protection.
- Industrial motor control panels.
- Motor starting and protection systems.
- Industrial machinery electrical systems.
- OEM automation and machine-building equipment.
- Control panels requiring DIN rail-mounted thermistor protection.
Technical Specifications
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| Terminal Type | Screw | |
|---|---|---|
| Reset Type | Manual or automatic | |
| Mounting Type | DIN rail | |
| Monitoring Function | Temperature / thermistor | |
| Coil / Supply Voltage | 220 V AC, 230 V AC, 240 V AC | |
| Contacts | 2 C/O | |
| Manufacturer | Lovato Electric | |
| Series | DRPT | |
| Model | 31DRPT220 | |
| Product type | PTC thermistor protection relay | |
| Rated supply voltage | 220–240 V AC | |
| Rated frequency | 50/60 Hz | |
| Release type | Thermal | |
| Reset mode | Manual or automatic | |
| Test button | Yes | |
| Trip indicator | No | |
| Phase failure detection | No | |
| Auxiliary contacts | 2 changeover contacts | |
| Rated insulation voltage (Ui) | 250 V between supply, inputs and outputs | |
| Rated impulse withstand voltage (Uimp) | 4 kV | |
| Auxiliary rated operational voltage | 250 V | |
| Auxiliary rated impulse withstand voltage | 4 kV | |
| Frontal protection rating | IP20 | |
| Pollution degree | 3 | |
| Terminal type | Screw | |
| Terminal tightening torque | 0.8–1.2 Nm | |
| Maximum flexible conductor section without lug | 1.5 mm² | |
| Maximum flexible conductor section with lug | 1.5 mm² | |
| Storage temperature | -30 to +80 °C | |
| Compensation temperature | -10 to +60 °C | |
| Operating position | Any | |
| Mounting | 35 mm DIN rail | |
| Weight | 292 g | |
| Package dimensions | 84 × 50 × 107 mm | |
| Package volume | 449.4 cm³ | |
| Quantity per package | 1 | |
| EAN13 | 8013975601020 | |
| HS code | 85389091 | |
| Conformity | IEC/EN 60255-5 |
Frequently Asked Questions
What is the Lovato 31DRPT220 used for?
The Lovato 31DRPT220 is a PTC thermistor protection relay designed for temperature-based motor and equipment protection applications.
What supply voltage does the Lovato 31DRPT220 require?
The 31DRPT220 operates from a 220–240 V AC, 50/60 Hz supply.
Can the Lovato 31DRPT220 be reset automatically?
Yes. The 31DRPT220 supports selectable manual or automatic reset.
How many auxiliary contacts does the Lovato 31DRPT220 have?
The 31DRPT220 incorporates two changeover auxiliary contacts, each with a rated operational voltage of 250 V.
How is the Lovato 31DRPT220 mounted?
The relay is designed for mounting on a standard 35 mm DIN rail and can operate in any normal mounting position.
Reliable Lovato Motor Protection
The Lovato 31DRPT220 provides PTC thermistor-based protection with a 220–240 V AC supply, manual or automatic resetting, two changeover auxiliary contacts and standard 35 mm DIN rail mounting for industrial motor control applications.
