Meba main circuit breaker MBI32-100
1.1 Function
protection of circuits against short-circuit currents,
protection of circuits against overload currents,
switch,
isolation,
MB132-100 circuit-breakers are used in domestic installation,
as well as in commercial and industry electrical
distribution systems.
1.2 Feature
high protective grade(up to IP20), high breaking capacity,
reliable sensitive action, convenient, long life etc.
1.3 Selection
Technical data of the network at the point considered:
the earthing systems (TNS, TNC),
short-circuit current at the circuit-breaker installation point,
which must always be less than the breaking capacity of this device,
Network normal voltage.
Tripping curves:
B curve (3-5In) protection for people and big length cables in TN and IT systems.
C curve (5-10In) protection for resistive and inductive loads with low inrush current.
D curve(10-14In) protection for circuits which supply loads with high inrush current
at the circuit closing (LV/LV transformers, breakdown lamps).
1.4 Approvals and certificates
Detailed information, please refer to Certificates Table
on the last page.
Meba main circuit breaker MBI32-100
Technical parameters:
| Rated impulse withstand voltage(1.2/50)Uim | 4000V |
| Rated short-time withstand current lcw | 12le,1s |
| Rated short circuit making capacity | 20le,t=0.1s |
| Dielectric test voltage at ind.Freq.for 1 min | 2.5KV |
| Insulation voltage Ui | 500V |
| Electrical life | 1500t |
| Mechanicai life | 8500t |
| Protection degree | IP20 |
| Ambient temperature(with daily average≤35°c) | -5~+40°c |
| Teminal size top/bottom for cable and pin-type busbar | 35mm²18-1/0 AWG |
