IDW3 intelligent universal circuit breaker

Application and scope of use

IDW3 intelligent universal circuit breaker (hereinafter referred to as circuit breaker) is suitable for use in power distribution network with rated voltage of 400V and rated current of 200-1600A at 50 Hz AC, mainly for distributing electric energy and protecting lines and power supply equipment from overload, short circuit, voltage and single-phase grounding faults. Under normal conditions, it can be used for infrequent line switching and for infrequent starting and protection of motors. The circuit breaker has a variety of intelligent protection functions and selective protection accuracy to enhance power supply reliability and avoid unnecessary power outages. The circuit breaker has an isolation function symbolized by layer 24.jpg.

The technical performance of the circuit breaker conforms to GB/T14048.2 "Low-voltage Switchgear and Controlgear Part 2 Circuit Breakers".

IEC60947-2 "Low-voltage switchgear and controlgear part 2 circuit breaker" and other standards.

Meaning of product model and its classification 

◆Model number and meaning

◆Classification

By type of use: Class A non-selective, Class B selective

Installation type: Fixed type, drawer type

Transmission type: Motor-driven, manual

Number of poles: three-pole, four-pole

Type of decoupler: Intelligent controller, shunt decoupler, ⽋ voltage instantaneous, or delay decoupler

Intelligent controller classification: Standard configuration is M-type intelligent controller

The IDW3 intelligent controller adopts the adjustment method of coded switch and pull switch. In addition to the three basic types of 2L2, 2L3, and 2L4 according to their protection characteristics, there are also M-type intelligent controllers with push-button setting and digital tube display, and H-type intelligent controllers with LCD display.

(2L2 basic protection: overload long delay time + short-circuit instantaneous; 2L3 selective protection: overload long delay time + short-circuit short delay time + short-circuit instantaneous; 2L4 selective protection + grounding protection: overload long delay time + short-circuit short delay time + short-circuit instantaneous + grounding protection current ⽮ amount and mode).

The M-type intelligent controller adopts the button adjustment method to adjust various protection parameters and the digital tube display method to show various data protection function diversification.

Intelligent controller performance

(a) Protection functions such as overload long delay time and reverse delay time, short circuit short delay time, short circuit transient, single-phase grounding, etc. can be set by the users themselves to form the required protection features.

(b) Single-phase grounding protection function: Protection is based on the three-phase current and neutral current (F.D.).

(c) Display function: Load current light column, MCU operation monitoring

(d) Alarm function: Overload pre-warning

(e) Self-test function: overheat protection, microcomputer self-diagnosis, A/D conversion self-test, EPROM self-test

(f) Test function: Test the operation characteristics of the controller

(g) Fault memory function: check the heat level of the line or equipment, check the fault current, delay time and fault status

(h) MCR and out-of-limit trip function: The circuit breaker should operate instantaneously when there is a fault current in the main circuit and the circuit breaker is larger than the short delay time setting value. 2L2 has no such function.

(i) Contact output function. The circuit breaker has four sets of contact outputs: overload alarm, grounding alarm, self-diagnostic alarm, and OCR fault release alarm.

Normal working conditions

Ambient air temperature: The upper limit should not exceed +40℃; the lower limit should not be lower than -5℃; the average value of 24h should not exceed +35℃.

Note: 1. Working conditions with a lower limit value of -10℃ or -25℃ must be declared to the manufacturer when ordering.

2. Working conditions where the upper limit value exceeds +40℃ or the lower limit value is lower than -25℃ should be negotiated with the manufacturer.

Altitude: The altitude of the installation site should not exceed 2000m.

Air conditions: The relative humidity of the air shall not exceed 50% at an ambient air temperature of +40°C. At lower temperatures, a higher relative humidity may be achieved at an average maximum relative humidity of 90% at the wettest month and an average minimum temperature of +25°C at that month, taking into account condensation on the product surface due to temperature changes.

Pollution class 3

Installation category

The installation category of the main circuit of the circuit breaker is Class IV. The installation category of the auxiliary circuit is Class III, except for the ⽋ voltage decoupler coil and the primary coil of the power transformer, which are the same as the main circuit of the circuit breaker.

◆Use category: Category B

◆Installation conditions: The circuit breaker should be installed in accordance with the installation requirements in the installation and use instructions. The vertical tilt of the circuit breaker should not exceed 5°.

Technical data and performance

The rated current of the circuit breaker is shown in Table 1.

Rated insulation voltage of the circuit breaker 690V Rated operating voltage 400V, 690V.

The rated short-circuit turning capability of the circuit breaker should not be smaller than 2.1Icu.
The rated short-circuit breaking capacity and short-time withstand current of the circuit breaker are shown in Table 2.

Note Ue=690VIcu=20kA.

Intelligent controller protection characteristics

The calibration values and errors of the intelligent controller are shown in Table 3.

M/H intelligent controller long-delay overcurrent protection inverse time limit action characteristic is t-K (/ N2-1) formula: long-delay action time, K controller curve rate N = I/Ir1, (actual fault current Ir1 long-delay rectification current), K coefficient see Table 4, action time bureaus Table 5 its time limit error is ± 10%.

M / H intelligent controller short delay overcurrent protection characteristics for the fixed time inverse time characteristics of the time limit error of ± 10%.

Ground fault protection action characteristics for the fixed-time inverse time characteristics when the fault current multiplier (I / If) is less than the shear factor Cr action characteristics for the inverse time characteristics. When the fault current multiplier is greater than or equal to Cr or Cr is set to OFF, the action delay characteristic is fixed time delay time equal to the set delay time, and the time limit error is ±10%.

The overcurrent protection characteristics of the circuit breaker and the ground fault protection characteristics curve are shown in Figure 1.

Figure 1 controller overcurrent protection characteristics, ground fault protection characteristics of the function curvilinear diagram

Table 4

Table 5

The number of cycle operations of the circuit breaker is shown in Table 6

Circuit breaker control circuit supply voltage is shown in Table 7

Note: The shunt excitation decoupler shall ensure disconnection of the circuit breaker in the range of 70%-100%Us, and the operating motor shall reliably complete energy storage in the range of 85%-110%Us.

The closing solenoid should ensure reliable closure of the circuit breaker within 85%-100%Us.

The intelligent controller should ensure that the circuit breaker works reliably within 85%-115% Ue. 

The undervoltage release characteristics of the circuit breaker are shown in Table 8

Auxiliary contact

The agreed heating current of auxiliary contacts is Ith=6A.

Auxiliary contact form standard configuration for four sets of conversion contacts, such as yonghu have special requirements should be specified when ordering.

The abnormal switching and breaking capacities of auxiliary contacts are shown in Table 9.

辅助触头正常条件下的接通与分断能⼒⻅表10 

The number of cycles of non-energized operation of the auxiliary contacts is the same as that of the main circuit of the circuit breaker.

The maximum operating force of the circuit breaker is 100N The operating force of the operating handle of the drawer-type propulsion mechanism is not da greater than 125N.

Recommended copper row for user installation jian table 11

The maximum power dissipation of the circuit breaker is shown in Table 12

Variation of rated continuous current at different ambient temperatures of circuit breakers is shown in Table 13, i.e., the ambient temperature of circuit breaker capacity reduction factor +40°C.

The accessory power consumption of the circuit breaker is shown in Table 14

Structure and accessories

The circuit breaker for the stereotypical arrangement form has a compact structure, small volume of structural characteristics (circuit breaker structure for Figure 2)

The circuit breaker is a frame combination structure divided into drawer type and fixed type. The fixed type is composed of seven major units such as intelligent controller, cumulus contact system, arc extinguishing system, operating mechanism electric and manual, closing, dividing excitation, voltage, etc. The drawer type is composed of inserted circuit breaker and drawer base, and the inserted circuit breaker is composed of intelligent controller, cumulus contact system, arc extinguishing system, operating mechanism electric or manual, closing, dividing excitation, voltage, etc. The inductor is composed of an intelligent controller, a cumulative contact system, an interrupter system, an operating mechanism, a manual or manual, closing, divider, and voltage unit. -The rails in the drawer base of the drawer circuit breaker can be pushed and pulled out to enter and exit the drawer on the rails, and the main circuit is connected through the incoming wires of the bridge contacts on the drawer base.

The drawer-type circuit breaker has three operating positions: "connect" position, "test" position, and "disconnect" position. When in the "connect" position, both the main circuit and the secondary circuit are connected. When in the "disconnect" position, the main circuit is completely disconnected from the two secondary circuits. -Contact system

The contact system uses a four-wire contact parallel structure with only the main contact and a smooth arc on the movable contact and an arc guide on the static contact. The contact system is mounted in an enclosed insulating chamber with a rotating center embedded in the wall of the insulating chamber, and the moment of closure from the main shaft causes the movable contacts to rotate around this rotating center in order to close. Each phase contact is a separate part and is mounted in a frame in the form of a building block.

Operating mechanism

The operating mechanism uses cams and springs to store energy to close and the closing speed is not related to the manual or electric operating speed. The operation mechanism is equipped with a self-release function and is divided into three procedures: "energy storage reclosing", "closing", and "breaking".

①When external force is applied by electric or manual operation, the savings shaft drives the cam to rotate the spring energy storage after the highest point of the cam is jumped in the missing point and the spring drives the sector plate to rotate clockwise around the support point, so that the closing lever and the closing half-axis re-buckling roller are held by the top plate and the energy storage ends.

② Press the "I" button or release the energy solenoid action to make the top plate counterclockwise rotation of the energy storage spring release energy axis driven by the cam counterclockwise rotation of the lever roller along the cam rolling lever up to push the spindle rotation so as to close the contact.

③Press the "O" button or the action signal from the overcharge injection, ⽋ voltage, or diversion to rotate the half-axis of the release, and the release lever unbuckles to break the circuit breaker quickly with the action of the contact backdriving spring.

Electric operating mechanism

The motor drives the eccentric shaft through the reducer, which transmits energy storage to the connecting rod, remote lever, pawl, and ratchet, which is pushed by the pawl. When the energy storage is complete, the cam opens the pawl to stop the ratchet rotation and the motor power is cut off by the range switch, and the motor stops rotating.

Undervoltage detriggers

Undervoltage detriggers for long-term working system can be divided into undervoltage instantaneous detriggers and undervoltage delay detriggers, undervoltage delay detriggers through the undervoltage delay device on the pull switch can adjust the delay time, number "1" on the delay time for 1s number "2" on the delay time for 3s number "3" on the delay time for 5s accuracy of ± 10%.

Divided excitation decoupler

The shunt striker can be operated remotely to disconnect the circuit breaker for repeated short-time operation with a turn-on time of not more than 3s.

Closing solenoid

Closing solenoid can be operated from a distance so that the circuit breaker closes for repeated short-time operation with a turn-on time of less than 3s.

Mechanical reset buttons are not available as standard.

The mechanical reset button is not provided as standard to prevent the circuit breaker from closing again after being disconnected due to overcurrent or ground fault. When a line or equipment fault occurs, the mechanical reset button pops out and the breaker will not close again until the button is pressed. This button is installed at the user's option.

Intelligent controller

The intelligent controller is the control center of the circuit breaker;

The intelligent controller is the control center of the circuit breaker and consists of transformer components, electric terminal components, flux converter, etc. It can provide various protection functions.

① Setting of various protection parameters

If the state needs to reset various protection parameters of the controller, it should be operated by a professional person using a special tool (a small clock with a screwdriver) to rotate the code switch or move the pull switch so that it points to the corresponding position of the corresponding protection parameters, and the rotation should not stay in the middle of the two scales.

②Fault detection

The controller can light up to indicate the cause of the fault and has a fault memory function after the circuit breaker is broken. Pressing the "Fault Check" button on the control panel once will indicate the cause of the last fault trip. If a fault occurs again, the historical fault memory is cleared and the current fault memory is retained. The analog breakout in the test state is not remembered. Press the "Reset/clear" button once after checking to bring the controller into the normal state.

③Heat memory function

Due to repeated overload causing serious heating of the conductor to avoid such a situation, the controller theoretically accumulates this thermal response and shortens the protection action time.

④ Test Function

The test function of the controller uses a simulated fault signal to check the operation performance of the controller and the circuit breaker. The first step is to close the circuit breaker and then press the "test" button on the faceplate. The controller will send out an instantaneous signal to break the circuit breaker while the faceplate indicates an instantaneous fault. After the test is completed, press the "reset" button to return the controller to normal operation before closing the new circuit again and placing it into operation.

The circuit breaker structure shown in Figure 2

1 - Upper mother line 2 - Mutual transformer 3 - Upper mother line 4 - Dynamic contact 5 - Interrupter 6 - Two secondary connectors 7 - Shunt release 8 - Closing solenoid 9 - Voltage release 10 - Handle 11 - Auxiliary contact 12 - Intelligent controller 13 - Electric mechanism 14 - Operating mechanism

Steel cable interlocking is only available for drawer type circuit breakers as shown in Figure 3, both horizontally and vertically, between adjacent cabinets or in the same cabinet R≥120mm

Circuit breaker ground fault protection mode is shown in Figure 4 (four kinds)

The controller is divided into two different types of protection: one is the differential type T. The controller protects according to the three-phase current and the amount of current on the neutral line and the number of circuit breaker poles: 3PT, 4PT3, 3P+NT, etc. The other type is the ground current type W. The controller takes an additional current directly between the neutral point of the main power supply and ground. The output current signal of the transformer is used to protect the transformer between the N line and PE line in Figure d below. 

图4接地故障保护⽅式 

Two secondary circuit wiring diagram

The circuit breaker has 40 terminals and the wiring diagram is shown in Figure 5, Figure 6 and Figure 7.

Circuit breaker installation size, profile size, and switchgear cabinet opening size

The mounting dimensions and external dimensions of fixed circuit breakers are shown in Figure 8

Figure 8 IDW3-200A~1600A drawer type circuit breaker

Drawer type circuit breaker mounting size and outline size are shown in Figure 9.

图9IDW3-200A~1600A抽屉式断路器

The mounting size and external size of the circuit breaker are shown in Figure 10.

图10IDW3-1600万能断路器⻔框柜⻔开孔尺⼨及安装孔孔距 

IDW3-1600M/H intelligent controller instructions for use

IDW3-1600M/H type intelligent controller faceplate diagram (Figure 11)

Normal operation parameters inquiry

The controller automatically cycles through three current values during normal operation and cycles through three-phase voltage values when the voltmeter function is added. To view more operating parameters, press the key to display the parameters.

Current meter window L1-L2-L3-N optional-If-δ1-δ2-δ3-%-X10

Voltmeter window UAB-UBC-CA-UA-UB-UC

1. The ammeter window shows the parameter description

The value shown when the "%" lamp is on is the contact wear value.

When the "×10" light is on, the value shown is the number of times the circuit breaker has been opened and closed.

The "δ", "%", and "L1/L2/L3" lamps are lit at the same time to show the unbalance rate of the corresponding phase.

The "If" and "A/kA" lamps are on at the same time to show the value of the N phase current.

The "L1/L2/L3" and "A/kA" lamps are both lit to show the corresponding phase currents.

The "N" and "A/kA" lamps are lit at the same time, and the value shown is the N-phase current.

The "A/kA" lamp flashes to indicate kA, and the constant lamp indicates A

2. The voltmeter window displays parameter descriptions

Either lamp in "1, 2, or 3" and the "V" lamp are on at the same time to indicate the three-phase line voltage, respectively.

Either lamp in "1, 2, 3", "N" and "V" are lit at the same time to indicate the phase voltage of the corresponding phase.

When the "T" lamp on the control panel lights up, a self-diagnostic fault is indicated and the fault code is displayed by pressing the OK button.

If the fault has been cleared, press the Return key to clear the self-diagnostic "T" lamp and return to normal status.

If there are multiple diagnostic faults, press the OK button to cycle through the fault codes.

Fault codes are shown in Table 15.

◆Controller Status Recognition

As shown on the control panel, the controller has the following states in operation:

① Setting status: The "Setting" lamp is on, and various protection characteristics can be viewed or modified.

②Inquiry status: The "Inquiry" lamp is on, and historical fault information can be viewed.

③Test state: The "test" lamp is on, and you can enter the trip test.

④Fault status: The "fault" lamp is on, indicating the fault category and cyclically displaying the fault current and time.

⑤ Alarm status: The "Alarm" lamp is on constantly, indicating that it is in the fault delay process.

⑥Storage status: The "Storage" lamp is on to indicate a data change.

⑦ Self-diagnosis status: The "T" lamp is on, indicating a self-diagnostic fault in the controller.

⑧ Communication status: Available for H type only, "Tx, Tr" lamp flashes to indicate data transmission.

◆ Setting value setting

Operate the functions, ▲, ▼, OK, Return and other keys on the controller ⾯ board to realize the functions of setting, query and test. Press the function key to cycle through the three status settings, query, test, press ▲, ▼ to enter the function selection or increase or decrease of parameter values. Press the OK key to enter the function status or store the changed data. Press the Return key to return to the upper level operation. When setting the setting values of various protection characteristics, Ir3 Ir2 Ir1 should be guaranteed, and IIc1 IIc2 is recommended. The operation steps are as follows:

Step ⼀: Press the function key until the "Setting" light flashes, and then press the "OK" key for several times. At this time, the "Setting" light still flashes, and at the same time, the light of a certain ⼀ protection category is on, indicating the setting status of ⽰ setting value.

Step ⼆: Press ▲ and ▼ keys to display the original setting data of various setting values circularly. If you want to modify a certain setting value, press the OK key. At this time, the "Setting" light is always on. Press the ▲ and ▼ keys to adjust until the required data. Press the OK key. The "Storage" light is on. The modified data has been saved in the following table. Press the return key to exit the modification of the setting value.

Step 3: Repeat step 3 until all setting values have been modified. Press the Back key to exit the setting function. Please refer to Table 16 below when modifying the setting values of various protection characteristics

◆Testing

The controller can perform a test decoupling. During the test, press the function key continuously until the "test" light flashes and press the OK key once to make the controller release the "test" light. Press the Return key to exit the test state and return to the normal operation level.

◆Inquiry

①The "fault" lamp lights up after the controller fails to protect and the fault category indicator lamp lights up after the controller cycles through the fault current and time. Press ▲ or ▼ to cycle through other data L1-L2-L3-N (optional)-If-δ1-δ2-δ3-%-X10 at the time of the fault, and press the Return key to exit the query state and return to normal operation.

②The history query controller stores the last fault record. When querying, press the function key continuously until the "query" and "fault" lights are on and the fault category is indicated. Press the ▲ and ▼ keys to cycle through other data L1-L2-L3-N (optional)-If-δ1-δ2-δ3-%-X10 at the time of the fault.

◆The default settings for the controller items are shown in Table 17.

IDW3-1600L Intelligent Controller User's Guide

IDW3-1600L type intelligent controller faceplate diagram (Figure 12)

See Table 18 for a description of the functions of the components on the faceplate of the L-type intelligent controller.

Installation, Inspection, and Maintenance 

Installation

1.Check whether the specifications of the circuit breaker meet the requirements before installation.

2.Check the insulation resistance of the circuit breaker with a 500V megohmmeter before installation. The insulation resistance should be no less than 100MΩ when the surrounding medium temperature is 20℃±5℃ and the relative humidity is 50%-70%.

3. The circuit breaker should be installed smoothly with no additional mechanical force and its base should be vertically level and fixed with four M8 screws.

4. Install the circuit breaker with a reliable protective grounding ground with a clear ground mark, and strictly observe the safety zone for fixed circuit breakers.

5. When installing the circuit breaker, the distance above the circuit breaker should not be close to the inter-years line. When connecting external yields to the circuit breaker, avoid all kinds of mechanical and forceful application to the circuit breaker. -After the circuit breaker is installed and wired according to the relevant wiring diagram, the following operational tests and checks should be performed in the test position of the drawer type circuit breaker, i.e., the indicator on the drawer block before the main circuit is energized.

(a) Check whether the operating voltage of the ⽋ voltage divider and the closing solenoid motor match the ⽋ voltage detriggers should absorb the circuit breaker in order to close it.

(b) After pulling the handle on the cover up and down seven times, the face plate will show "energy storage" and a "click" will be heard, then press the "I" button or the closing solenoid to energize the circuit breaker reliably. (c) Operate the motor until the motor is energized.

(c) Operate the motor until the face shield shows "energy storage" and the motor is automatically powered off with a "click" to end energy storage. The circuit breaker closes reliably.

(d) After the circuit breaker closes, the breaker shall be disconnected by the detent test of the controller regardless of the voltage, the detent or the "O" button on the shield.

Use of Intelligent Controller

(a) The "mechanical reset (for optional mechanical reset or clear lamp reset)" button must be pressed once before the circuit breaker is closed under load current to bring it into normal operation.

(b) After each test or fault release, the "mechanical reset (for optional mechanical reset or clear lamp reset)" button must be pressed once before the circuit breaker can be tested or put into operation.

Maintenance of Circuit Breakers

1. Periodically lubricate each rotating part during use.

2. Maintain the circuit breaker with good insulation by regularly maintaining and cleaning the dust.

3. The contact system should be inspected regularly, especially after each short-circuit interruption.

(a) Interrupter. Whether the inner wall of the interrupter is broken; whether the smoke marks are cleared; whether the interrupter fence is seriously burned and replaced in a timely manner according to the situation.

(b) whether the contacts of the contact system are in good contact; if the contact thickness is less than 1mm, it should be sent to the manufacturer for replacement.

(c) whether the connection parts are loose.

4. After maintenance to reach the electrical life need to change the interrupter and contacts

5. without maintenance to reach mechanical life need to replace the motor, energy storage mechanism and the main contacts.