Product Profile of Motor Protection Relay
Larsen & Toubro Limited offers Motor Protection Relay. Larsen & Toubro Limited is an ISO 9001 certified company. The Motor Protection Relay offers different types of protections like Negative Sequence, Thermal over load, Under current, Earth fault and Locked rotor. Some technical specifications of this Motor Protection Relay are as follows:
Thermal Over Load Protection comes with the following key features:
- Thermal Memory - Provided
- Pre alarm - at 1.05 Im [flashing LED]
- Current Setting 1A to 88 A in 6 ranges
- Trip Time Characteristics - Class 10A, 10, 20 and 30 as per IEC 947-4-1 [front panel setting]
Earth fault Protection has some salient features such as:
- Trip time delay - 200 msec [Factory set]
- Disable feature - DIP switch on front panel.
- Current setting 10 to 50percent of Im [front panel]
Key Features of Motor Protection Relay
- Trip time delay - 3 sec [Factory set]
- Unbalance current - 40 percent of Im [Factory set]
- LR current - 3 Im [Factory set]
- Trip time delay - 1 sec [Factory set]
- Disable feature - Front panel DIP switch
- Trip time delay - 3 sec [Factory set]
- Under current threshold - 50 percent of Im [Factory set]
- Disable feature - Available from front panel DIP switch
- Indications for Power on LED
- Indications for trip on each of the 5 faults [LEDs are manual reset]
- Rated Current 5A
- 1 N/O + 1 N/C manual reset
- Rated Voltage 250 V AC / 30 V DC
- Weight: Less than 400 grams
- Accuracy: As per IEC 947-4-1
- Operating Temperature: 0 to 60 deg.C
- Auxiliary power supply: 240 V AC +/- 20 percent
- Over all dimensions: 70mm W x 85 mm H x 106 mm D
- Reference Standards: IEC 60255, IEC 61000 and IEC 60068
