88 Series Plastic Nut Resettable Manual Reset Overload Protector Thermal Motor Protection Circuit Breaker
88 series Circuit breakers (commonly known as overcurrent protectors) are suitable for AC 50/60Hz, rated working voltage up to 250 Va c, DC 32Vdc, rated current up to 30A for additional overload protection in the internal branch circuit of electrical equipment. The key part, the temperature sensing element is made of bimetallic material. It is not only a thermal sensor, but also an operating mechanism. It is accurate and reliable. It is widely used in various electromechanical appliances, such as: electric tools, power sockets, various generators, Electric motors (such as washing machines), uninterruptible power supplies (UPS), electric heating appliances, etc.
Main Technical Parameters
| Rated Current | 125/250VAC |
| 32VDC |
| Rated Voltage | XXA |
| Interrupt Capacity | 1000A(UL1077) |
| Insulation Resistance | 500VDC 5s″, insulation resistance≥100ΜΩ |
| Dielectric Strength | 1500VAC/min |
| Reset Time | within 60S |
| Reset Type | Manual reset |
Mechanical/Environmental Data
Working temperature: -10℃ to 60℃
Terminal: Quick-connect terminal or solder terminal
Nut: a variety of options, see product appendix and diagram
Terminal temperature rise: rated current <65℃ (ambient temperature is 25℃)
Contact life: ＞500Cycles at rated current and 125VAC×150%
Table of Environmental Correction Factors
| (Derating Factor) |
| -5°C | (3A-4A)×1.2, (5A-30A)×1.12 |
| +40°C | (3A-4A)×0.92,(5A-30A)×0.94 |
The time current characteristic curve depends on the ambient temperature prevailing. In order to eliminate nuisance tripping. Please multiply the current brea ker current ratings by the derating factor shown below
Example:
Normal Continuous Current= 10A
Ambient Temperature = 45 °C
Multiplication Factor = 0.85
Recommended Rating=10A/0.85=11.8A
Select the Nea rest Rating = 12A
| OVERLOAD | TRIP TIME |
| 150% | Trip in a hour |
| 200% | 5.0-30.0 SEC |
| 300% | 1.2-12.0 SEC |
| 400% | 0.6-5.0 SEC |
| 500% | 0.4-2.8 SEC |
| 600% | 0.3-1.8 SEC |
| 800% | 0.18-0.9 SEC |
| 1000% | 0.12-0.7 SEC |
Performance form of the experiment
| Max Resistance V.S.Current Rating at 25℃ | Derating Factor |
| Temperature | Rating Amp |
| Current Rating in Amp | Max Resistance in ohms | 60℃ | X 0.6 |
| 3-4Amp | < 0.05 | 50℃ | X 0.7 |
| 5-6Amp | < 0.04 | 40℃ | X 0.8 |
| 7-8Amp | < 0.025 | 30℃ | X 0.9 |
| 9-11Amp | < 0.02 | 25℃ | X 1.0 |
| 12-13Amp | < 0.01 | 20℃ | X 1.1 |
| 14-16Amp | < 0.008 | 10℃ | X 1.3 |
| 17-25Amp | < 0.007 | 0℃ | X 1.5 |
| Approval | File No. | Rated Current | Rated Voltage | Standard |
| CUL | E155159 | 3-30A | 125/250VAC | UL1077 |
| TUV | B140558611005 | 3-30A | 125-250VAC | EN60934 |
| 32VDC |
| CCC | 2011010307520568 | 3-30A | 125/250VAC | GB17001 |
Contact Details:
Andy Wu
Email: andy@tianrui-fuse.com.cn
MP/Whatsapp: +86 13532772961
Wechat: HFeng0805
Skype: andywutechrich
QQ: 969828363
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88 Series Plastic Nut Resettable Manual Reset Overload Protector Thermal Motor Protection Circuit Breaker Images
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