SM600BA50A1 EATON | Alldatasheet
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Remote Controlled Circuit Breaker (RCCB) Qualified Qualified to demanding perfor- mance parameters of MIL - PRF - 83383 standard. Use as a Relay, Circuit Breaker, Or Both RCCBs combine the best attri- butes of a circuit breaker and a relay. Automatically protects the wires and the load device dur- ing circuit/load breakdown, but allows the flight deck control of the load during normal opera- tion. Weight and Cost Savings In distributed-load applications, RCCBs are a more efficient power distribution solution pro- moting cost and weight savings through the elimination of long runs of heavy cables associ- ated with the conventional relay - flight deck circuit protector method. Control of the RCCB requires only one #22 AWG control wire from the ICU on the flight deck to the RCCB. Cockpit Space Savings An RCCB system removes the presence of large circuit break- ers from the cockpit while per- mitting remote On/Off operation from the flight deck. Combine Eaton RCCB with Indicator Control Unit (ICU) model #1500- 052-05. OVERLOAD CALIBRATION DATA Specification T able Must Hold Must Trip MIN 115% @ 25°C MAX 138% @ +71°C MIN 115% MAX 138% @ -54°C MIN 115% MAX 150% T est Time Parameters % for 1 Hour % Within 1 Hour Single Pole 28 VDC 115/200 VAC 400 Hz Three Phase 115/200 VAC 400 Hz Three Phase Only Rupture Levels 3600 A (115 VAC or 28VDC for 1Pole and 115VAC for 3 Pole) Endurance 50,000 Cycles (Resistive & Inductive(Motor) Endurance (Motor) 5-50A: 50,000 cycles; 60-100A: 25,000 cycles Endurance (Lamp) 5-25A: 50,000 cycles; 35-50A: 25,000 cycles; 60-100A: no rating Dielectric Strength 1500V , 60Hz, MIL -STD-202, method 301, 0.5 MA max Insulation Resistance 100 mega ohm min, MIL -STD-202, method 302 Thermal T emperature Range -54°C to 71°C (-65°F to 160°F). MIL -STD-202, Method 107 Vibration 10G's to 2000 Hz. Exceeds MIL -STD-202, Method 204, Condition C, 10 microseconds max. chatter Shock 25G's. MIL -STD-202, Method 213, 10 microseconds max. chatter Altitude 50,000 ft. EMI Requirements MIL -STD-461, Requirements CS114 and RE102 over the frequency range of 14 KHz to 400 MHz and RE102 limits for Aircraft and Space Systems. EMI/RFI Susceptibility MIL -STD-461, Class 1D and Generation Moisture Resistance MIL -STD-202, method 106 Salt Spray Resistance MIL -STD-202, method 101, Condition B Sand and Dust Resistance MIL -STD-202, method 110, Condition A Fungus Resistance MIL -HDBK-454, Guideline 4 Explosion Proof MIL -STD-202, method 109 Weight (Single Pole) 5-25A: 318 grams (0.703 lbs.); 35-50A: 325 grams (0.719 lbs.); 60- 100A: 332 grams (0.734 lbs.) Weight (w/ Auxiliary Contacts) 5-25A: 332 grams (0.734 lbs.); 35-50A: 339 grams (0.750 lbs.); 60- 100A: 346 grams (0.766 lbs.) Weight (Three Phase) 2.0 lbs. max. PERFORMANCE DATA
10 EATON CORPORATION Aerospace TF300-0 January 2005
EATON CORPORATION Aerospace TF300-9 January 2005 11 Remote Controlled Circuit Breaker (RCCB) Engineering Data Single Pole Single Throw (Double Break Contacts) Three Pole Single Throw (Double Break Contacts) Catalog Number1 Rated Contact Load (Amperes) MIL-PRF-83383 Part Number Maximum Weight Oz/gm
28 Vdc 115/200 V 400 Hz
Res. Ind. Motor Lamp Res. Ind. Motor Lamp SM600BA5A1 5 5 5 5 5 5 5 5 M83383/02-01 11 .75/332 SM600BA5N1 10 10 10 10 10 10 10 10 M83383/01-02 11 .25/318 SM600BA10A1 M83383/02-03 11 .75/332 SM600BA10N1 15 15 15 15 15 15 15 15 M83383/01-03 11 .25/318 SM600BA15A1 M83383/02-04 11 .75/332 SM600BA15N1 20 20 20 20 20 20 20 20 M83383/01-04 11 .25/318 SM600BA20A1 M83383/02-05 11 .75/332 SM600BA20N1 25 25 25 25 25 25 25 25 M83383/01-05 11 .25/318 SM600BA25A1 M83383/02-06 11 .75/332 SM600BA25N1 35 35 35 35 35 35 35 35 M83383/01-06 11 .25/318 SM600BA35A1 M83383/02-07 12.00/339 SM600BA35N1 40 40 40 40 40 40 40 40 M83383/01-07 11 .50/325 SM600BA40A1 M83383/02-08 12.00/339 SM600BA40N1 50 50 50 50 50 50 50 50 M83383/01-08 11 .50/325 SM600BA50A1 M83383/02-09 12.00/339 SM600BA50N1 60 60 60 — 60 60 60 — M83383/01-09 11 .50/325 SM600BA60A1 M8338/02-10 12.25/346 SM600BA60N1 75 75 75 — 75 75 75 — M83383/01-10 11 .75/332 SM600BA75A1 M83383/02-11 12.25/346 SM600BA75N1 100 100 100 — 100 100 100 — M83383/01-11 11 .75/332 SM600BA100A1 M83383/02-13 12.25/346 SM600BA100N1 M83383/01-13 11 .75/332 Catalog Number1 Rated Contact Load (Amperes) 115/200 V 400 Hz MIL-PRF-83383 Part NumberRes. Ind. Motor Lamp SM601BA10A1 10 10 10 10 M83383/04-03 SM601BA15A1 15 15 15 15 SM601BA20A1 20 20 20 20 M83383/04-05 SM601BA25A1 25 25 25 25 SM601BA35A1 35 35 35 35 M83383/04-07 SM601BA40A1 40 40 40 40 M83383/04-08 SM601BA50A1 50 50 50 50 SM601BA60A1 60 60 60 60 M83383/04-10
1 Contact factory on alternate amperage, trip times, control confi gura-
tions, grounding, auxiliary switches, and mounting systems.
ORDERING INFORMATION
- 5 100 MS P/N M83383/01-01 M83383/01-03 M83383/01-04 M83383/01-05 M83383/01-06 M83383/01-07 M83383/01-08 M83383/01-09 M83383/01-10 M83383/01-11 M83383/01-13 Single Pole Single Throw (Double Break Contacts) Three Pole Single Throw (Double Break Contacts) Standard w/ A uxiliary Contacts w/ A uxiliary Contacts EATON P/N SM600BA5N1 SM600BA10N1 SM600BA15N1 SM600BA20N1 SM600BA25N1 SM600BA35N1 SM600BA40N1 SM600BA50N1 SM600BA60N1 SM600BA75N1 SM600BA100N1 MS P/N M83383/02-01 M83383/02-03 M83383/02-04 M83383/02-05 M83383/02-06 M83383/02-07 M83383/02-08 M83383/02-09 M83383/02-10 M83383/02-11 M83383/02-13 EATON P/N SM600BA5A1 SM600BA10A1 SM600BA15A1 SM600BA20A1 SM600BA25A1 SM600BA35A1 SM600BA40A1 SM600BA50A1 SM600BA60A1 SM600BA75A1 SM600BA100A1 MS P/N M83383/04-03 M83383/04-05 M83383/04-07 M83383/04-08 M83383/04-10 EATON P/N SM601BA10A1 SM601BA15A1 SM601BA20A1 SM601BA25A1 SM601BA35A1 SM601BA40A1 SM601BA50A1 SM601BA60A1 All Ampere Ratings equal to Rated Contact Loads (Resistive, Inductive, Motor, and Lamp) except as noted. * No Lamp Load Rating ** Contact Factory Note: Contact factory on alternate amperage, trip times, control configuations, grounding, auxilary switches, mounting systems, etc. Remote Controlled Circuit Breaker (RCCB) OVERLOAD CALIBRATION DATA Ratings All Percent Rated Current 115% 138% 115% 150% Ambient T emperature Degrees C. ± 5° 25°C & 71°C -54°C T ripping Time No Trip 1 Hour Max.* No Trip 1 Hour Max.* * Must trip in one hour. SINGLE POLE OVERLOAD CALIBRATION DATA Ratings All Percent Rated Current 115% 138% 115% 150% Ambient T emperature Degrees C. ± 5° 25°C & 71°C -54°C T ripping Time No Trip 1 Hour Max.* No Trip 1 Hour Max.* * Must trip in one hour. TRIPLE POLE AMPERE RATING AMPERES MIN SECONDS 200% T rip Times -54°C to +71°C MAX SECONDS 400% T rip Times -54°C to +71°C MIN SECONDS 2.8 1. 7 2.9 2.6 2.8 2.6 2.9 2.4 MAX SECONDS 9.6 1000% T rip Times -54°C to +71°C MIN SECONDS 0.42 0.35 0.4 0.4 0.35 0.36 0.4 0.26 MAX SECONDS 1. 3 1. 2 1. 15 1. 3 1. 3 1. 3 1 .25 1. 8 TRIP CURVE Contact business unit for trip curve. AMPERE RATING AMPERES 7. 5 100 MIN SECONDS 200% T rip Times -54°C to +71°C MAX SECONDS 400% T rip Times -54°C to +71°C MIN SECONDS 1. 2 2.4 2.8 1. 7 2.9 2.6 2.8 2.9 2.9 2.6 2.5 2.7 3.5 MAX SECONDS 6.4 6.8 8.5 8.3 7. 6 8.7 8.3 9.2 12.5 1000% T rip Times -54°C to +71°C MIN SECONDS 0.3 0.33 0.42 0.35 0.4 0.4 0.35 0.36 0.4 0.26 0.26 0.3 0.38 MAX SECONDS 1. 2 1. 1 1 .05 1. 2 1. 15 1. 3 1. 3 1. 3 1 .25 1. 8 1. 8 1. 9 OVERLOAD CALIBRATION DATA — SINGLE POLE OVERLOAD CALIBRATION DATA — THREE POLE
12 EATON CORPORATION Aerospace TF300-0 January 2005
Remote Controlled Circuit Breaker (RCCB) Engineering Data Application Note FLIGHT DECK SWITCH MS22073-1/2 OR MS26574-1/2 B U S S L O A D 1/2 AMP
100 AMPS RCCB
With RCCB Distributed Load Concept T ypical Wiring Diagrams NOTE: Terminals 5A and 5B internally grounded to the mounting leg (s). Integrated Wire Termination (IWT) module accepts pin contacts P/N M39029/1-100 or -101. Use with insertion/extraction tool M81969/14-02. Contacts and Coil Circuits Only Three Pole Auxiliary Contacts Intermittent Duty Coils Current Cut-Off Controlled Electronically Contacts and Coil Circuits Only Single Pole Intermittent Duty Coils Current Cut-Off Controlled Electronically Without RCCB B U S S FLIGHT DECK
100 AMPS
L O A D Integrated Wire Termination Module (MIL-STD-1549) 5A 5B S3 S1 S2 A1A2 To Indicator/ Control Unit Circuit Breaker Type MS22073- 1/2 OR MS26574-1/2 Backup Control Power (when used)
115 V 400 HZ or 28 Vdc
(Must be same AC Phase as the “Line” Power) Internal Connection Auxiliary Contacts When Applicable LINELOAD 3 4 6 LOAD LOAD LOAD LINE LINE LINE To Indicator/ Control Unit Circuit Breaker Type MS22073- 1/2 OR MS26574-1/2 5A 5B S3 S1 S2 Backup Control Power (when used) 28 Vdc Internal Connection Auxiliary Contact s 3 4 EATON CORPORATION Aerospace TF300-9 January 2005 13 Wiring for Multiple Line Protection 3 4 5A 65B 3 4 5A 65B 3 4 5A 65B
Remote Controlled Circuit Breaker (RCCB) — 1 Pole and 3 Pole Engineering Data Approximate Dimensions - 1 Pole Options Special application auxiliary switches Unique grounding Power sources Other current ratings Control via systems other than I/CU Low level auxiliary con- tacts available Data Bus/Interface capabil- ity available Electronically held coil Moisture resistant sealing Three Pole Typical Placement of Rating on Top Plane LOAD A2 LINE A1 .172/4.37 DIA. 2 MTG. HOLESR. 20 5.08 .688/ 17 .48 2.940 7 4.68 3.250 82.55 Main Contact Position Indicator Red: Closed; Green: Open Mtg. Flanges Mate As Shown 1 .530 38.86 2.250 57 .15 .350 8.89 .07 1 .778 .500 - .610 12.70 - 15.24 .180 4.57 3.42 86.87 Name Plate .084 2.13 4.26 108.20 .056 1. 4 2 .42 10.67 1 .200 30.48 LOAD A2LOAD B2LOAD C2 LINE A1LINE B1LINE C1 2.526 64.16 2.940 74.68 3.250 82.55 2.526 64.16 Main Contact Position Indicator Red: Closed; Green: Open 2.28 57 .91 1.50 38.86 .350 8.89 .07 1.78 .05 1.27 4.26 108.20 3.43 87 .12.130 3.30 .77 19.56 2.03 51.56 3.29 83.57 3.69 93.73 Location of NamePlate
14 EATON CORPORATION Aerospace TF300-0 January 2005
Coil Operate Current/Set And T rip Time RCCB Circuits
1 Pole
3 Pole
28 Vdc
(18 Volts MIN.)
115 Vac
400 Hz (104 V . MIN. (18 Volts MIN.) 400 Hz (104 V . MIN.) I/CU Set Current @ Nom Voltage (Mulliamp) Set Coil Current @ Nom Voltage Pulse
3.0 AMP
10 AMP
7 .0 AMP MAX
13.0 AMP
Voltage & Room T emp.
20 Millisec
15 Millisec
MAX. Set Time Most Adverse Condition - MIN. Voltage 71°C. Ambient
35 Millisec
30 Millisec
*I/CU. Trip Current Nominal 71°C & Nominal Voltage 1 .4 AMP
6.8 AMP
1 .5 AMP
4.3 AMP
-54°C & Nominal Voltage 1 .9 AMP
6.3 AMP
2.0 AMP
3.3 AMP
Room T emp. Nominal Voltage 1 .6 AMP
8.6 AMP
1 .7 AMP
4.5 AMP
71°C & Nominal Voltage
0.9 AMP
***
6.1 AMP
***
4.0 AMP
-54°C & Nominal Voltage
2.1 AMP
7 .0 AMP
2.2 AMP
3.1 AMP
MAX. Standby Current Milliamp * MAX. I/CU. Line Impedance 7 .5 Current Decreases w/Time so that I 2t Average Half-Wave Rectified DC Current *Absolute Min. Value from -54° to +71°C
Description
The Remote Control Circuit Breakers (RCCB) concept, as load controllers in distributed- load applications, provides for a more efficient power distribution system with less line loss at a lower cost and with less weight than the conventional relay-flight deck circuit protector method. Designed to meet the require- ments of MIL -PRF-83383, the RCCB's capability and advan- tages include: Fusible link fail safe Remote on/off operation from the flight deck Visual indicators for open (green) and closed (red) on top surface Substantial reduction in weight and size Most direct route from power source to load Single wire control line from I/CU to RCCB Double-break power contact assembly Indication of trip or set by position of the ½ ampere cir- cuit breaker on the flight deck Elimination of long runs of heavy and costly cables Magnetically latched coils (low power consumption) Use as a relay or circuit breaker or both Flanges mate for in-line or side-by-side mounting 1PST FOR DC OR SINGLE PHASE AC 3PST FOR THREE PHASE AC ONL Y Application The Remote Control Circuit Breaker (RCCB) is a combination relay and circuit breaker which can be released or set by apply- ing a release or set coil current electronically controlled by a command from the Indicator/ Control Unit (I/CU) (a ½ ampere fast trip, thermal circuit breaker). With power available to terminal #4 and/or terminal A1 (28 Vdc or 115V 400 Hz) on 1PST RCCB: to terminal #4 (28 Vdc) and/or both terminals B1 and C1 (115V
400 Hz) on 3PST RCCB, the
RCCB will assume the state requested/indicated by the I/CU. If power is removed from termi- nal #4 and A1 on 1PST or from terminal #4 and both B1 and C1 on 3PST , the RCCB will remain in the state it was in prior to power removal. When power is reapplied to the terminals, the RCCB will assume the state indicated by the I/CU. With the RCCB closed, an over- load or fault current on any line or lines will cause the RCCB to trip and in turn will cause a controlled overload of the I/CU, causing it to trip also. A fault or overload on any power contact will cause the RCCB to trip open within the time limits specified regardless of the availability of coil power. To reclose the RCCB, the I/CU line (line 3 to ground) must be opened by the I/CU or series switch and reconnected to ground. Other Performance Parameters For MIL-PRF- 83383 Coordination. An overload applied to two devices in series with a 2 to 1 current rating will result in only the lower rated device opening. Rupture capability to 3600A (115 Vac rms or 28 Vdc for SM600BA and 115 Vac rms for SM601BA series) Dielectric. 1500 V , 60 Hz, MIL - STD-202, Test Method 301,
0.5 MA maximum
Explosion-proof. MIL -STD-202, Test Method 109 Thermal Temperature Range. - 54°C to 71°C (-65°F to 160°F). MIL -STD-202, Test Method 107 Insulation Resistance. MIL - STD-202, Test Method 302,
100 Megohms minimum
Aircraft Electrical Power. MIL - STD-704 Vibration. 10 g's to 2000 Hz. MIL -STD-202, Test Method 204. Condition C (-54°C, 25°C, and 71°C). Maximum duration of contact transfer to uncommanded state: 10x10 -6 seconds. Shock. 25 g's. MIL -STD-202, Test Method 213. Maximum duration of contact transfer to uncommanded state: 10x10 -6 seconds. Altitude. 50,000 feet EMI, MIL -STD-461, Class 1D Moisture Resistance. MIL - STD-202, Test Method 106 Fungus Resistance. MIL -STD- 454, Guideline 4 Sand and Dust Resistance. MIL -STD-202, Test Method 110, Test Condition A Salt Spray Resistance. MIL - STD-202, Test Method 101, Test Condition B Remote Controlled Circuit Breaker (RCCB) — 1 Pole and 3 Pole Engineering Data EATON CORPORATION Aerospace TF300-9 January 2005 15
Remote Controlled Circuit Breaker (RCCB) Introduction Part of the weight of the mod- ern jet aircraft comes from the electrical wires and power control systems needed to dis- tribute the electrical energy. As these aircraft increase their pas- senger carrying capability, the electrical power management system becomes more complex and could become heavier. Wire runs of more than 300 feet from the flight deck circuit breakers to the load become common. Utilization of Eaton's Remote Controlled Circuit Breakers (RCCB) close to the load or power source will eliminate much of these long, heavy, and expensive wire/cable. Control of the RCCB requires only one #22 AWG control wire from the flight deck to the RCCB. Weight reduction, directly from wire use and indirectly from (generator) line heat loss, and installation and maintenance cost reductions becomes sig- nificant. The RCCB combines the best attributes of a circuit breaker and a relay. The RCCB automati- cally protects the wires and the load device during circuit/load breakdown, but allows flight deck control of the load during normal operation. Operation The RCCB is basically a relay and a circuit breaker and allows the utilization of each identity singularly or in combination, depending upon the application. All of the RCCB's capabilities apply in either application. It can be employed as a relay located adjacent to its load and remotely operated much like relays are today through control wiring and a switching device in the flight deck. It can also be utilized as a circuit breaker and mounted adjacent to the load, the power source, or even the flight deck. Single Pole RCCB Motor Operation Figure 1 depicts a simplified presentation of the RCCB. Figure 2 describes the "motor", which when "energized", will result in typical armature trans- fer operation. The magnetic circuit utilizes a permanent magnet as a fulcrum and latch for the rocking arma- ture and uses electro-magnets (coils) at each end of the arma- ture stroke for transfer purpose. In the set position (Figure 2), the flux generated by the per- manent magnet follows a patch from the top of the permanent magnet through the armature, through the left leg of the elec- tro-magnet and back to the per- manent magnet. When the coil T1 -T2 is ener- gized, the flux generated is such that it "flows" through the permanent magnet in the same direction as the flux gener- ated by the permanent magnet itself. Its path now, however, is through the right leg of the elec- tro-magnet. The flux generated by the electro-magnet increases in magnitude as power is applied, and as the flux builds up in the path through the right leg of the electro-magnet, the flux tending to latch the arma- ture in the left leg of the electro- magnet becomes very small in comparison. The armature then "transfers" and seals at the pole face of the right leg of the elec- tro-magnet. Single Pole 28 VDC 115/200 VAC 400 Hz Three Phase 115/200 VAC 400 Hz Three Phase Only Qualified Meets MIL -PRF-83383 Weight and Cost Savings Saves fuel by eliminating long runs of heavy, costly cables Space Savings Keeps larger breakers out of cockpit RCCB System for Remote Operation To form an RCCB system enabling remote On/Off opera- tion from the flight deck, com- bine the Eaton RCCB with Indicator Control Unit (ICU) model #1500-053-05 on pg. 13. Single Wire from Flight Deck Control of the RCCB requires only one #22 AWG control wire from the ICU on the flight deck to the RCCB. Use as a Relay, Circuit Breaker, or Both Combines the best attributes of a circuit breaker and a relay. Automatically protects the wires and the load device dur- ing circuit/load breakdown, but allows the flight deck control of the load during normal opera- tion. Design Concept BI-METAL E-PIVOT H-LATCHG-PIVOT LOAD-L2 LOAD-L1 K B D A S1 S2 M N J T2T1 L-LEVER ARMATURE PERMANENT MAGNET DOUBLE THROW TOGGLE SWITCH SET POSITION TRIP POSITION STATIONARY CONTACTS I LATCH BAR MOVEABLE CONTACT BRIDGE TRIP (OPEN) COIL SET (CLOSED) COIL C Figure 1 BS N A S1 S2 T2T1 PERMANENT MAGNET TRIP (OPEN) COIL SET (CLOSED) COIL Figure 2
16 EATON CORPORATION Aerospace TF300-9 January 2005
18 EATON CORPORATION Aerospace TF300-9 January 2005
Remote Controlled Circuit Breaker (RCCB) — Design Concept Note that the coil U1-U2 is con- nected in parallel with T1-T2. It is wound on the left-hand core of the electro-magnet such that when energized along with T1- T2, the force it generates will be in a direction opposing the latch- ing force generated in that core by the permanent magnet. The utilization of a permanent magnet and intermittent duty coils, in conjunction with cut- throat contacts, allows a consid- erable reduction in copper and iron from that normally required in electro-magnets for continu- ous duty operation. RCCB Operation as a Circuit Breaker To examine the operation of the device as a breaker, refer to Figures 3, 4, and 5. In Figure 3, the device is shown in the closed contact position (presumably) carrying rated cur- rent. Should an overload occur, currents greater than rated cur- rents now "flow" through the device "entering" through L2, passing through the bimetal, through the connection of the bimetal to one stationary contact, through the bridging moveable contact structure, to the other stationary contact, and "out" through L1 . Depending upon the size of the overload, the bimetal will begin to deflect as shown in Figure 5 until the actuating end of the bimetal engages latch H at point Motion and force due to the deflection of the bimetal moves latch H such that it rotates in a counter-clockwise direction around its pivot point E. When latch H has moved an adequate distance, the upward force of lever L, applied at point C to latch bar I, will rotate latch bar I counter-clockwise around its pivot point G. This allows the main lever L to rotate clockwise around point D (where it is engaged with the armature) due to the "contact return" spring (compression spring) force K acting upon the moveable con- tact bridge. Note that when this overload occurs, the armature is not transferred to the "off" (tripped) position, but instead remains in the latched position normally associated with the "on" (set) position of the device. To "reset" the device after the fault or overload clears could be readily accomplished by energiz- ing the "trip" coil (T1-T2) through a toggle or push-button switch (see Figure 1) located in the flight deck. The armature would then transfer and seal on the right-hand core of the electro- magnet, which is the "open" position shown in Figure 4. At that time, springs M and N (ten- sion springs) would reposition latch bar I and latch H to the position shown in Figure 4, pro- viding that the bimetal has now cooled sufficiently and returned to its original position as shown in Figure 4. At this stage, the RCCB is still in an "open posi- tion" i.e. (the contacts are open), but as outlined above, the fault or overload has been cleared through action and operation of the device through bimetal- lic activity, i.e. "Circuit Breaker" operation. To re-close the contacts, it is now only necessary to energize coils S1-S2 and re-establish a mechanism position similar to that shown in Figure 3. If the fault of overload condition is still in existence, the device would again trip through bimetallic activity as just described.
2.5 MILLISECONDS
1.0 RECTIFIED AC
2Ø RECTIFIED AC APPROXIMATELY
0.4 MILLISECONDS OFF TIME
1Ø AC 2Ø AC ØB ØB ØC
1.25 MILLISECONDS OFF TIME
EATON CORPORATION Aerospace TF300-9 January 2005 19 Three Pole RCCB The design principles employed in the 3-pole RCCB have fol- lowed many of the same paths utilized in the 1-pole RCCB. Differences other than the obvious, such as size, weight, shape, etc., are explained below. Motor Operation The principles of motor opera- tion and construction of the three pole devices are similar to those employed in the single pole RCCB. In the 3-pole device, the AC operating power is drawn from two of the three phases. The "off" time between current pulses during coil ener- gization is approximately 0.4 milliseconds. In comparison, the "off" time for single-phase power is approximately 1 .25 millisec- onds. See Figure 6. The timing circuit establishes a coil "on" time longer than the actual transfer time of the arma- ture. The operation of the 3-pole RCCB is identical to the 1-pole. Control Circuit Refer to Figure 7. There is one minor difference in operating principles and parameters from the single pole devices. The difference is the addition of a power junction area in the electronics. (see Figure 7). The 3-pole RCCB is designed for use in 3-phase circuits and is a 400 Hz AC load controller. The power junction is designed to use AC power only. DC operate (coil) power may be used even though AC loads are to be con- trolled. This connection is made at terminal 4 of the IWTS con- nector. In Figure 7, two sepa- rate power junctions are shown: one for AC and one for DC. In the event both AC and DC are connected to the RCCB, only AC would be utilized by the logic circuit. Should AC power be lost, the DC connection would auto- matically take over the control function. The other differences between 1-phase and 3-phase control circuitry, i.e. timer addition, is directly related as described in the above Motor Operation sec- tion. LINE POWER
115 V 400 Hz
(1/2 AMP C.B.) SET SWITCH (FET) EMERGENCY (BACK-UP) POWER 28Vdc TRIP SWITCH (FET) LOGIC POWER SUPPLY POWER JUNCTION TRIP COIL LOGIC TIMER DC ØB ØC Set Coil Figure 7 *Indicates In 3 Phase Electronics Remote Controlled Circuit Breaker (RCCB) — Design Concept