RDW8DC series universal circuit breaker have a vanety ot protection functions.While achieving highly accurate selective protection, it can also avoid unnecessary power outage and improve the reliability and safety of the power supply system.
The circuit breaker has the selective protection function to realize the inter-circuit breaker Hierarchical coordination protection and backup protection to reduce the accident scope of the power grid. Therefore, it is especially suitable for the protection system of large capacity DC current power supply.
| RDW8 | DC | 25 | 16 | 3 | H | Drawer level | AC230V | No undervoltage | A1 |
| Product code | Breaking grade | Frame current | Rated current | poles | Controller | Installation mode | Control voltage | Attachments | Connection mode |
| DC intelligent type Universal circuit breaker |
DC | 25:2500(08-25) 40:4000(16-40) |
08:800A 10:1000A 12:1250A 16:1600A 20:2000A 25:2500A 29:2900A 32:3200A 36:3600A 40:4000A |
2:2P 3:3P 4:4P |
R:Enhanced type(Liquid crystal Display) H:Advanced type(LCD with communication) |
Drawer level Drawer vertical Fixed level Fixed vertical |
AC230V AC400V DC220V DC110V |
Interphase partition Quadruple transformation Door frame No undervoltage Mechanical interlocking One lock, one key Two locks and one key Three locks, two keys It's 50-50 Six on, six off |
2500: 2 pole string 3-pole string 4-pole string（see figure）4000: 3 pole string 4-pole string（see figure） |
RDW8DC default standard configuration: shunt, closing, electric operation, 4 group conversion, door frame, interphase partition
For example: need to order a RDW8DC-2500,three pole drawer, rated current 1250A, intelligent controller for R type,control voltage AC230V, wiring mode A1,
Expressed as: RDW8DC-25 12/3R drawer level AC230V without undervoltage A1.
Normal working condition
● The ambient air temperature is -5℃~ +40℃, and the average value of 24h does not exceed +35℃;
Note:If the upper limit exceeds +40℃ or the lower limit is lower than -5℃, the user needs to negotiate with the manufacturer.
● The elevation of the installation site does not exceed 2000m;
Note: Consult with the manufacturer for the circuit breaker used in the working environment with an altitude of more than 2000m.
● The relative humidity of the atmosphere does not exceed 50% when the ambient air temperature is +40℃;It can have higher relative humidity at lower temperatures;
For example, the wettest month has an average maximum relative humidity of 90%, while the The average minimum temperature of the month is +20℃,and treatment measures
should be taken for the occasional condensation due to temperature changes.
● The pollution level is 3;
● When the rated working voltage of the main circuit is DC750V~ DC1500V, the control circuit and auxiliary circuit need to be isolated from the main circuit by transformer, and the maximum working voltage of the control circuit and auxiliary circuit is AC400V,control circuit and auxiliary circuit installation category is Ⅲ;
● The circuit breaker is suitable for electromagnetic environment A;
● Use category B.
Normal installation condition
● Installation of fixed circuit breaker: The circuit breaker is placed in the distribution cabinet and secured with M10 (more than 2500A shell frame)bolts and washers. The circuit breaker is installed smoothly without additional mechanical stress Avoid circuit breaker damage or poor contact of main busbar;
● Installation of drawer type breaker. Remove the circuit breaker body from the drawer seat,install the drawer seat in the distribution cabinet first, and tighten with M10(more than 2500A shel frame) bolts and washers.Circuit breaker mounting level Stable, there should be no additional mechanical stress,so as to avoid circuit breaker damage or poor contact between the main bus and the secondary circuit,after the completion of the circuit breaker body into the drawer seat connection position;
● The circuit breaker should be installed in a place without explosion risk and conductive dust, without enough to corrode metal and destroy insulation;
● The protection level is IP20. When the circuit breaker is installed in the cabinet and the door frame is installed, the protection level can reach IP40.
Normal storage and transport conditions
● The lower limit of temperature is not less than -25℃,the upper limit is not more than +55℃; Relative humidity (+25℃) does not exceed 95%;
● The product should be handled gently during transportation, and should not be inverted to avoid violent collision.
| Ccircuit Breaker | RDW8DC-2500 | RDW8DC-4000 | |||
| Series poles(P) | 2、3、4 | 3、4 | |||
| Rated current In(A) | 800、1000、1250、1600、2000、2500 | 1600、2000、2500、3200、3600、4000 | |||
| Rated operating voltage Ue(V) | DC500V/750V(2P、3P) 、DC1000V/1500V(4P) | DC500V/750V(3P)、DC1000V/1500V(4P) | |||
| Rated insulation voltage Ui(V) | 1500 | 1500 | |||
| Rated impulse withstand voltage Uimp(kV) | 12 | 12 | |||
| Rated limit short circuit Breaking capacity Icu(kA) | DC500V | 2P | 50 | / | |
| 3P | 65 | 120 | |||
| DC750V | 2P | 40 | / | ||
| 3P | 55 | 80 | |||
| DC1000V | 4P | 50 | 75 | ||
| DC1500V | 4P | 40 | 60 | ||
| Rated operating short-circuit breaking capacity Ics(kA) | 100%Icu | 100%lcu | |||
| Rated short-circuit closing capacity Icm(kA) | 100%Icu | 100%lcu | |||
| Rated short-time withstand current Icw(kA)/1s | 100%Icu | 100%lcu | |||
| Installation method | Stationary | ● | ● | ||
| Drawer type | ● | ● | |||
| Full segment time(no additional delay) | 25~30ms | ||||
| Closing time | ≤70ms | ||||
| Mechanical life (with maintenance) | 20000 | 20000 | |||
| Mechanical life(no maintenance) | 10000 | 10000 | |||
| Electrical life | 7000 | 6000 | |||
| Connection mode(horizontal) | ● | ||||
| Connection mode (vertical) | ● | ||||
| Connection mode (top horizontal and bottom vertical) Connection mode (vertical up and horizontal down) |
● | ||||
Note: The mechanical life of drawer seat is 100 times, from"separation"to"connection" to"separation" is once, and the operation cycle is 1 time /2min.
①Intelligent controller model (corresponding product model);
②LCD liquid crystal display window: can display each phasecurrent value, voltage value, setting parameter, fault current Flow, trip time and information query parameters;
③Overload long delay fault indication;
④Short circuit short delay inverse time fault indication;
⑤Setting key:Quickly switch to the parameter setting main menu,(in the password input interface is "To right"key);
⑥Measurement key:Quickly switch to the measurement default main menu,(under the password input interface is "Left" key);
⑦Up key:Move the menu content up at the current level,or change the selection up parameters;
⑧Down key:Move menu contents down at the current level,or change the selection down parameters;
⑨Back key:Exit the current level to enter the upper-level menu,or cancel the current parameter the selection of;
⑩Ok key:Enter the next level menu that the current item points to,or proceed to the current parameter select,store the changes made;
⑪Query key:Switch to the history and maintenance theme menu;
⑫Protection parameter setting key:Switch to the protection parameter setting theme menu;
⑬Short circuit instantaneous fault indication;
⑭Short-circuit short-delay fixed time fault indication;
⑮Communication instruction:Profibus:no communication when off,communication constant light;
⑯Modbus:turns off when no communication is available and blinks when communication is available.Normal indication:in the power state,the working state is normal,the LED is always green flashing;
⑰Fault/alarm indicator:the "fault/alarm"LED does not light up during normal operation; breakdown When tripping,the "Fault/alarm"LED is red and flashes rapidly;In case of alarm When the LED red constant bright;
⑱Reset button:When the intelligent controller is in the fault/alarm state,it needs to restore to normal work state,press this key to clear the intelligent controller fault/alarm indication.
RDW8DC-2500/4000R type secondary loop wiring diagram terminal function and symbol interpretation
| Terminal Number | Function Description | Symbol | Paraphrase | Remark |
| 1、2 | Auxiliary power input:AC230V、AC400V、DC220V、DC110V | RDW8DC | RDW8DC universal circuit breaker | |
| 3、4、5 | Fault trip auxiliary contact,contact capacity:AC250V、3A | S1~S4 | Signal lamp | User provided |
| 20 | Ground(PE) | TA | Current transformer | |
| 21、22 | Voltage signal measurement:positive and negative power supply | SAL | microswitch | |
| 29、30 | Shunt release | SB1 | Opening button | User provided |
| 31、32 | Closing electromagnet | Sb2 | Closing button | User provided |
| 33、34、35 | Electric operating mechanism(electric energy storage),37 connectedwith green line,38 connected with black line,39 connected with red line | X | Closing electromagnet | |
| 36~48 | Auxiliary contact terminal | F | Shunt release | |
| ★Since the main circuit voltage of this series is high voltage, the voltage signal measurement of 21 and 22 of the R/H controller needs to be connected to the voltage conversion module. | M | Electric operating mechanism | ||
| SA | Electric operating mechanism ravel switch | |||
| Fu | fuse | User provided | ||
| PE | Ground wire | |||
| AX | Auxiliary contact | |||
RDW8DC-2500/4000 H type secondary loop wiring diagram terminal function and symbol interpretation
| Terminal number | Terminal number | Symbol | Paraphrase | Remark |
| 1、2 | Auxiliary power input:AC230V、AC400V、DC220V、DC110V | RDW8DC | RDW8DC universal circuit breaker | |
| 3、4、5 | Fault trip auxiliary contact,contact capacity:AC250V 3A | S1～S4 | Signal lamp | User provided |
| 10、11 | Communication interface output,10 is(+),11 is(-);(Note:Default Modbus-RTU communication mode) | TA | Current transformer | |
| 12～15 | DO1,programmable signal output,contact capacity:AC250V,3A | SAL | microswitch | |
| 14、15 | DO2,programmable signal output,contact capacity:AC250V,3A | SB1 | Opening button | User provided |
| 16、17 | DO3,opening signal output,contact capacity:AC250V,3A | SB2 | Closing button | User provided |
| 18、19 | DO4,closing signal output,contact capacity:AC250V,3A | X | Closing electromagnet | |
| 20 | Ground(PE) | F | Shunt release | |
| 21、22 | Voltage signal measurement,positive and negative power supply | M | Electric operating mechanism | |
| 29、30 | Shunt release | SA | Electric operating mechanism travel switch | |
| 31、32 | Closing electromagnet | Fu | fuse | User provided |
| 33、34、35 | Electric operating mechanism(electric energy storage),33 connected with green line,34 connected with black line,35 connected with red line | PE | Ground wire | |
| 36~48 | Auxiliary contact terminal | AX | Auxiliary contact | |
| ★Since the main circuit voltage of this series is high voltage, the voltage signal measurement of 21 and 22 of the R/H controller needs to be connected to the voltage conversion module. | ST-DP module | When the communication mode is Profibus-DP | Selective assembly | |
| ST Power Module | Communication function when needed | Selective assembly | ||
| St201 relay module | Communication function when needed | Selective assembly | ||
RDW8DC-2500 Intelligent universal Circuit breaker (Drawer type)
RDW8DC-2500 Intelligent universal Circuit Breaker (fixed type)
RDW8DC-4000 Intelligent universal Circuit breaker (Drawer type)
RDW8DC-4000 Intelligent universal Circuit breaker (fixed type)
