● Under normal circumstances, the circuit breaker can be used as a line to distribute power and as overload, short circuit and undervoltage protection for the line and power equipment.
● Circuit breakers for protecting motors, used in distribution networks to break of squirrer-cage motors during starting and running and to protect squirel-cage motors against overload, short circuit and undervoltage.
● Circuit breakers can be installed vertically or horizontally.
| RDM8HU | 400 | M | P | 3 | 3 | 10 | AC1140V | 125A | AC230V | Board front connection |
| Product code | Shell level | Breaking ability level | operating mode | Number of poles | Trip mode | Accessory | Rated voltage | Rated current | Accessory voltage | Installation wiring mode |
| High voltage molded case circuit breaker | 250(63~250) 315(280~315) 400(250~400) 630(400~630) 800(630~800) |
M: Higher fracture type H: High segment type |
No code:Direct handle operation P:Electrical operation Z:Turn the handle to operate |
3:3 poles | 2:Single magnetic type 3:Thermo magnetic type |
00: No accessories 08: Alarm contact 10: Shunt release 18: Shunt release, alarm contact 20: auxiliary contact 02: auxiliary contact 28: auxiliary contact, alarm contact 40: Shunt release, auxiliary contact 12: Shunt release, auxiliary contact 48: Shunt release, auxiliary contact alarm contact 60: two sets of auxiliary contacts 68: Double auxiliary contact,alarm contact |
AC800V AC1000V AC1140V |
63、80、100、125、140、160、180、200、225、250、280、300、315、350、400、500、630、700、800 | Shunt release DC24V、AC230V、AC400V | Board front connection (No code) Backboard connection |
● The altitude of the installation site does not exceed 2000m;
● Allow the ambient temperature is not higher than +40℃, not lower than -5℃,(Over +40℃ capacity reduction, specific consultation with the manufacturer);
● Atmospheric conditions: When the ambient temperature is 40℃, the relative humidity of the atmosphere does not exceed 50%, and a higher relative humidity is allowed at a lower temperature, such as 90% at 20℃, and considering the condensation that occurs on the surface of the product due to temperature changes;
● The pollution level:level 3;
● Installation category:Ⅱ;
● The magnetic field of the installation position should not exceed 5 times the geomagnetic field in any direction;
● In a medium that is not at risk of explosion, and in which there is no gas or conductive dust sufficient to corrode metal and destroy insulation;
● No erosion from wind and snow;
● Can be installed horizontally and vertically;
● There should be no significant impact and vibration at the installation place, and it should not be installed in flammable and explosive places.
| Model(Table 2) | RDM8HU | |||||
| Specification | 250 | 315 | 400 | 630 | 800 | |
| Number of pole | 3 | |||||
| Breaking ability level | M、H | |||||
| Rated current In(A) | 63、80、100、125、140、160、200、225、250 | 280、300 315 | 250、315、350、400 | 400、500 630 | 630、700、800 | |
| Rated insulation voltage Ui(V) | 1500 | 1500 | ||||
| Rated impulse withstand voltage Uimp(kV) | 12 | 12 | ||||
| Rated operational voltage Ue(V) | AC800、1000、1140 | |||||
| Arcing distance(mm) | +50(0) | +100(0) | ||||
| Rated limit short-circuit breaking capacity Icu(kA) | AC800V | M:36.5 | H:50 | M:36.5 | H:50 | |
| AC1000V | M:20 | H:20 | M:20 | H:20 | ||
| AC1140V | M:10 | H:15 | M:10 | H:15 | ||
| Rated operating short-circuit breaking capacity Ics(kA) | AC800V | M:25 | H:35 | M:25 | H:37.5 | |
| AC1000V | M:12 | H:15 | M:12 | H:15 | ||
| AC1140V | M:10 | H:15 | M:10 | H:15 | ||
| Electrical life(times) | 1500 | 1000 | 1000 | 800 | 500 | |
| Mechanical life(times)² | Maintenance free | 10000 | 10000 | 7000 | 7000 | 7000 |
| Maintenance required | 15000 | 5000 | 10000 | 10000 | 10000 | |
| Outline dimension(length * wide * height) | 288×107×135 | 320×182×156 | ||||
| Reference ambient temperature℃ | 40 | |||||
●The over-current trip device consists of a thermal long-delay trip device with inverse time-Iimitcharacteristics and an instantaneous electromagnetic trip device, whose operating characteristics are shown in Table3.
| Distribution circuit(Table 3) | Circuit breakers for protecting motors | ||||||
| Rated currentIn(A) | thermal overload release | Electromagnetic trip operating current(A) | Rated currentIn(A) | thermal overload release | Electromagnetic trip operating current(A) | ||
| 1.05Inconvention al non-tripping time(h)(cold) | 1.30Inconvention al non-tripping time(h)(thermal) | 1.0Inconvention al non-tripping time(h)(cold) | 1.2Inconventional trippingcurrent(h)(cold) | ||||
| 63<In≤125 | 2 | 2 | 10In±20% | 63≤In≤630 | 2 | 2 | 12In±20% |
| 125<In≤800 | 2 | 2 | 5In±20% 10ln±20% |
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| Type specification | Outline dimension(mm) | Installation dimension(mm) | |||||||||
| L | W | H | L1 | L2 | W1 | H1 | H2 | a | b | 4-Φd | |
| RDM8HU-250/3 RDM8HU-315/3 |
200 | 107 | 135 | 10.5 | 9.5 | 22 | 98 | 26 | 35 | 164 | 4.5 |
| RDM8HU-400/3 RDM8HU-630/3 RDM8HU-800/3 |
270 | 182 | 156 | 18 | 18 | 41 | 118 | 29 | 58 | 200 | 7 |
| Type specification | Distance(mm) | |||||||||
| A | B | C | D | E | G | H | I | J | n-φd | |
| RDM8HU-250/3 | 30 | 30 | 30 | 30 | 188 | 80 | 280 | 94 | 53 | 2-φ4.5 |
| RDM8HU-315/3 | ||||||||||
| RDM8HU-400/3 | 30 | 30 | 30 | 30 | 185 | 50 | 320 | 118 | 60 | 4-φ4.5 |
| RDM8HU-630/3 | ||||||||||
| RDM8HU-800/3 | ||||||||||
