Features
- Tripping Characteristic
The expected tripping behavior, and in particular the expected break time of the desired MCB can be determined from its I-t tripping characteristic. - In line with the two existing tripping systems (overload release with bimetal, short circuit release with magnet coil), the path of the I-t tripping characteristic consists of two characteristic curve sections:
• Overload section (thermal)
• Short circuit release section (magnetic) - The overload section of the curve describes the tripping behavior of the bimetal, while the short circuit release section of the characteristic curve describes the release behavior of the short circuit coil.
- Depending on the equipment used and the operational behavior of the connected loads the short
circuit release of the MCB must trip to ensure safe and efficient short circuit protection. These are called the tripping characteristics. The following tripping characteristics for MCBs are standardized in accordance with IS/IEC 60898-1
• Tripping Characteristic B: 3-5 x In
• Tripping Characteristic C: 5-10 x In - ‘B’ Characteristic MCBs reacts quickly to short circuit, and are set to trip when the current passing through them is between 3 to 5 times of the normal full load current. They are suitable for protecting incandescent lighting and socket outlet circuits in domestic and commercial environments, where there is little risk of surges that could cause the MCB to trip.
Specification
| 5SJ3;5SJ6 | ||
| Standards | IS / IEC 60898-1 : 2015 | |
| Tripping characteristic | B / C | |
| Rated voltage Un | V AC | 240 / 415 |
| Current Rating | A | 6 – 63 |
| Operational voltage | V AC
Min. Max. |
24 264 / 456 |
| Rated breaking capacity Icn | kA | 4.5;6 |
| Insulation coordination
• Rated insulation voltage • Degree of pollution for overvoltage category |
V AC |
250 / 440 2 / III |
| Handle end position, sealable | Yes | |
| Degree of protection | IP20 | |
| CFC and silicone-free | Yes | |
| Conductor cross-sections | mm2
• Solid and standed • Finely stranded, with end sleeve |
0.75 … 25 0.75 … 25 |
| Terminals
• Terminal tightening torque |
N-m |
2.5 … 3 |
| Line load reversibility | Any | |
| Service life on average, with rated load | 20 000 actuations | |
| Ambient temperature | °C | -25 … +55, max. 95 % humidity,
storage temperature: -40 … +75 07 |
