L1 Series Electronic Current Limiter Push Manual Reset Overload Protector Single Pole 50V DC Circuit Breaker
L1 Series "SERIES TRIP", "PUSH TO RESET" Single Pole circuit breakers represent our largest selling product family. Bases on a proven "SNAP ACTING" bimetallic thermal seneing elemant system. L 1 Series circuit breakers sease Overload conditions and interupt the flow of Current. The resettable actuator mechenism then remains disengaged until manually reset.
L1 Series offers amperage ratings from 3A to 60A, and is suitable for a diversity of applications, our products are carefully calibrated and tested to ensure reliable performance under a variety of operating assignments and conditions.
Specification
| Rated Voltage | AC 125/250V DC 50V |
| Rated Current | 3~60A |
| Interrupt Capacity | 125VacX1 000A 250VacX200A |
| Insulation Resistance | >500 MΩ |
| Resettable Overload Capacity | Ten Times Rated Current |
| Dielectric Strength | 1 ,500Vac 1 minute |
| Weight | Approx 25.0g (0.9 oz.) |
| Voltage Drop | Less than 0.25V |
| Reset 1 rime | Within 60 seconds |
| Method of Operation | R Type and J TYPE |
Mechanical / Environmental Data
Operating Temperture Range: -10°C to 60°C
Termination: 250" (6.35mm) quick conects or solder terminals Mounting: Various options. See Ordering lnfomation and drawings
Temperature Rise at Terminal Block: Less than 65°C at 100% of rated current applied continuously at 25°C
Contact Endurance: 125Vac X 150% of rated current >500 Cycles
| Typical Resistance VS. Current Rating @ +25°C |
| Current Rating in Amps | TvpicalResistance in Ohms | Current Rating in Amps | Typical Resistance in Ohms |
| 5.0 | 0.052 | 15.0 | 0.017 |
| 6.0 | 0.042 | 20.0 | 0.012 |
| 7.0 | 0.036 | 25.0 | 0.010 |
| 8.0 | 0.031 | 30.0 | 0.008 |
| 10.0 | 0.025 | 35.0 | 0.007 |
| 12.0 | 0.021 | 40.0 | 0.006 |
Ambient Compensation Table
| Capacity Correction Factors For Ambient Temperatures |
| | Temperature |
| Current Rating Amps | °F | +14 | +32 | +50 | +68 | +77 | +86 | +104 | +122 | +140 |
| | °C | -10 | +0 | +10 | +20 | +25 | +30 | +40 | +50 | +60 |
| 3 to 8A | | .70 | .80 | .92 | .98 | 1.00 | 1.10 | 1.25 | 1.61 | 2.00 |
| 9 to 40A | | .74 | .78 | .83 | .90 | 1.00 | 1.05 | 1.15 | 1.31 | 1.55 |
The unit is calibrated for ambient temperature of +25°C. To determine the rated current for a lower or higher ambient Temperature, use a correction factor as above.
Time vs. Current Trip Curve@+25°C
| 100% of rated current | Hold, No-Trip |
| 135% of rated current | Trip in 1 Hour |
| 200% of rated current | Within 40 Seconds |
| 300% of rated current | Within 10 Seconds |
| Approval | File No. | Rated Current Range | Rated Voltage | Standard |
| UL+cUL | E478741 | 3~50A | 125/250VAC | UL1077 |
| TUV | 50046704 | 3~50A | 125/250VAC | EN60934 |
| CCC | 2014010307693248 | 3~50A | 125/250VAC | GB17701 |
| UL :+cUL | E482018 | 3~50A | 125/250VAC | UL244A |
Working Principle of L1 Circuit Breaker
An overload protector (circuit breaker) protects the compressor by sensing temperature and current. It is composed of a set of normally closed contacts and bimetallic elements. The overcurrent overload protector is mounted on the outside of the compressor, in direct contact with the compressor casing and in series with the compressor windings. If the compressor cannot be started for some reason, the overloaded locked-rotor current will cause the bimetal element to heat up and bend rapidly, causing the contact to quickly trip, cutting off the current flowing through the compressor, thereby protecting the compressor. Similarly, if the motor of the compressor is abnormally heated and the temperature of the windings of the compressor is too high, the protector will heat up and trip, thereby protecting the compressor. As long as the cause of the failure is not ruled out, the compressor will start and stop with the action of the bimetallic element over and over again in the case of overcurrent and overload.
Contact Details:
Andy Wu
Email: andy@tianrui-fuse.com.cn
MP/Whatsapp: +86 13532772961
Wechat: HFeng0805
Skype: andywutechrich
QQ: 969828363
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