tec P - CK010 Self-Powered

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1 V 4.F tec P - CK010 Self-Powered Protection unit Product detail & Installation Instructions Outec Controls Pretoria South Africa 1

2 Attention In order to use the unit safely, correctly and effectively, please pay attention to the following. 1) Please read these instructions carefully. 2) The unit is installed only by a professional/trained person. 3) We will not be responsible for any failure s as a result of not complying to this instruction 4) It is strictly prohibited to inserted or pulled any card and touch the chips and parts when the unit is powered. 5) Only reliable and calibrated test equipment to be used to test the unit 6) Test and ensure the correct aux supply voltage is used (according to the units rated voltage) before connecting it to the unit. Contents 1 Standards GENERAL APPLICATION FUNCTION FEATRUE 4 3 TECHNICAL PERFORMANCE OPERATION ENVIRONMENT CONDITION ELECTRICAL AND TECHNICAL PARAMETERS Rated data Over-load capability Power consumption Measurement range Measurement accuracy Protection pickup time: The fixed pickup time of all protections is not more than 35ms under 1.5 times setting External tripping Voltage on contacts DC 24V this voltage is supplied from the protection unit Output tripping contact Potential free contacts ratings INSULATION PERFORMANCE Insulation resistance Dielectric strength Surge voltage Moist heat resistance performance ELECTROMAGNETIC ANTI-INTERFERENCE PERFORMANCE Electrostatic discharging anti-interference degree Radio frequency electromagnetic field radiation anti-interference degree Electric rapid instantaneous pulses anti-interference degree Surge impact anti-interference degree MECHANICAL PERFORMANCE Vibration Impact Collision FUNCTION CONFIGURATION PHASE CURRENT TWO ZONE DEFINITE TIME PROTECTION PHASE CURRENT INVERSE TIME PROTECTION ZERO-SEQUENCE DEFINITE TIME PROTECTION 10 tec P CK010 Self-Powered V 4.F Page 2.

3 4.4 ZERO SEQUENCE INVERSE TIME PROTECTION EXTERNAL CONTACT TRIP DIRECTLY HEAVY CURRENT BLOCK TRIP Mainly used for (Load Break Switches) PASIVE TRIP OUTPUT CONFIGURATION Tripping Contacts EVENT RECORD 11 5 STRUCTURE, INSTALLATION AND WIRING STRUCTURE AND INSTALLATION Front board layout Outline structure WIRING This one is for the unit powered from external power supply The other, shown in Fig. 5.7, is for self-supply power system UNIT PARAMETER SETTING DESCRIPTION SYSTEM PARAMETER System password CT ratio Communication address (IF fitted or applicable) Baud rate PROT SETTING PARAMETER 14 7 HUMAN-COMPUTER INTERFACE OPERATION SIGNAL INDICATOR KEYPAD Power-Up without aux power and no current flowing LCD Operation menu Main menu Attention: PROTECTION SETTING DESCRIPTION PROTECTION TEST DESCRIPTION The system wiring is shown in TEST METHOD Primary current fault simulation test Protection test Secondary injection Standards GB/T Electrotechnical terminology-power system protection (eqv IEC :1995) GB Degrees of protection provided by enclosure (IP code) (eqv IEC60529:2001) GB/T Fire hazard testing for electric and electronic products - Part 5: Test flames - Needle test method - Apparatus, confirmatory arrangement and guidance (idt IEC :2004) GB/T Basic testing method for relaying protection and security automatic equipment GB/T Electrical relays--part 21:Vibration,shock,bump and seismic tests on measuring relays and protection equipment--section 1:Vibration tests(sinusoidal) (idt IEC :1988) GB/T Shock and bump tests on measuringrelays and protection equipment (eqv tec P CK010 Self-Powered V 4.F Page 3.

4 IEC :1988) GB/T Electrical relays--part 22-3: Electrical disturbance tests for measuring relays and protection equipment-radiated electromagnetic field disturbance tests (idt IEC :2000) GB/T Electrical relays Part 22-4:Electrical disturbance test for measuring relays and protection equipment Electrical fast transient/burst immunity test (idt IEC :2002) GB/T Electrical relays - Part 22-1:Electrical disturbance tests for measuring relays and protection equipment - 1 MHz burst immunity tests (eqv IEC :2007) GB/T Measuring relays and protection equipment - Part 22-2: Electrical disturbance tests - Electrostatic discharge tests (idt IEC :2002) GB Measuring relays and protection eauipment - Part 27: Product safety requirements GB/T Electrical relays--part 25:Electromagnetic emission tests for measuring relays and protection equipment (IEC :2000, IDT ) GB/T Electromagnetic compatibility(emc) - Testing and measurement techniques - Power frequency magnetic field immunity test (idt IEC :2001) GB/T Electromagnetic compatibility--testing and measurement techniques--pulse magnetic field immunity test (idt IEC :1993) GB/T Electrical relay-part 22-6:Electrical disturbance tests for measuring relays and protection equipment-immunity to conducted disturbances induced by radio frequency fields GB/T Electrical relays Part 22-5:Electrical disturbance test for measuring relays and protection equipment Surge immunity test GB/T Electrical relays Part 22-4:Electrical disturbance test for measuring relays and protection equipment Power frequency immunity tests GB/T Technical code for relaying protection and security automatic equipment GB Code for design of relaying protection and automatic device of electric power installations DL/T General specifications for relaying protection and security automatic equipment 2 GENERAL 2.1 APPLICATION This unit is developed to be used in cases where there is no Aux supply available. This unit can provide protection for electrical networks or specific equipment by tripping the supply circuit breaker. The one specific feature of this relay is the fact that it can trip normal tripping coils and the circuit break does not need to be fitted with a low energy tripping coil. Some of the protection functions Normal overload Earth fault protection. External trip contact 2.2 FUNCTION FEATRUE The unit adopts a micro-processor with high integration level and a chip including the bus to manage signals from the current transformer. The output of the unit is controlled via digit logic. The unit is housed in a seal case, with maintenance-free and strong anti-interference capability. The unit adopts low power consumption technology to support the protection function in-order to start quickly and reliably under any condition. The unit is simple, small and can be mounted easily If the self-power function may be selected, the power is supplied from the current transformer. tec P CK010 Self-Powered V 4.F Page 4.

5 Setting of the relay can be done easily through the interface screen and buttons. Multiple IEC standard inverse time definite curves are available. The unit may record up-to 100 historic events. With perfect dynamic and static self-check function, the unit monitors the operation state of the unit on line to make the unit operate reliably. With high accuracy components and technology, the unit is accurate and reliable. 3 TECHNICAL PERFORMANCE 3.1 OPERATION ENVIRONMENT CONDITION Environment temperature o Operation temperature -20 C ~60 C o Storage temperature -40 C ~ 85 C Relative humidity: 5% ~95% Atmosphere pressure: 70 KPa ~ 110KPa Height above sea level: not more than 3500m 3.2 ELECTRICAL AND TECHNICAL PARAMETERS Rated data AC current: Frequency: 5A/1A Aux Power supply: o o o 50Hz/60Hz AC 220(110)V,±20% DC 220(110)V,±20% DC 24V,±20% Self-power is from the phase current transformer Over-load capability Current circuit long time operation in 10s In 1s In Power consumption External power supply Self-powered from the CT s The power to start the unit 2 VA. 1VA 0.2VA Measurement range Current 0.1In ~ 20In Zero-sequence current 0.01A ~ 10A Measurement accuracy Current <1% Zero sequence current <0.005A Protection pickup time: The fixed pickup time of all protections is not more than 35ms under 1.5 times setting External tripping Voltage on contacts DC 24V this voltage is supplied from the protection unit Output tripping contact Potential free contacts ratings DC 24V, 48V, 110V, 220V 8 Amps AC 220V, 8 Amps tec P CK010 Self-Powered V 4.F Page 5.

6 3.3 INSULATION PERFORMANCE Insulation resistance N o Tested part Test requirement Remarks. 1 AC current circuit to ground Between AC circuit and power 2 circuit Measured by 3 Power circuit to ground use of Switch quantity input circuit to 4 Insulation megger with ground resistance >100MΩ 1000V open Switch quantity output circuit to 5 circuit ground voltage Between switch quantity input 6 circuit and switch quantity output circuit Dielectric strength N o Tested part. 1 Power circuit to ground 2 Communication circuit to ground 3 AC current circuit to ground 4 Between AC circuit and power circuit 5 Switch quantity input circuit to ground 6 Switch quantity output circuit to ground Between switch quantity input 7 circuit and switch quantity output circuit Surge voltage N o Tested part. Test condition Under normal test atmosphere condition, the unit bear specified voltage (2 test voltages are 1000V and the others are 2000V) for 1min. when the voltage is applied across the tested circuit, the other circuits connected each other are grounded. Test condition Test requirement Without breakdown, or flashover or any component failure Test requirement AC current circuit to ground Between AC circuit and power circuit Power circuit to ground Switch quantity input circuit to ground Switch quantity output circuit to ground Under normal test atmosphere condition, the unit bear the short-time surge voltage test of Without breakdown, flashover or component failure tec P CK010 Self-Powered V 4.F Page 6.

7 6 Between switch quantity input circuit and switch quantity output circuit standard lightning wave for 1.2/50us, with open test voltage of 5kV. To do the settings without Aux Power and the breaker open please see: Moist heat resistance performance The unit shall bear the constant moist heat test specified in GB/T The test temperature is +40 ±2 and relative humidity is (93±3)%. The test period is 48h. The insulation resistance between circuits is measured separately in 2h before the test is finished. The resistance shall not be less than 1.5 MΩ. The dielectric strength shall not be less than 75% of voltage specified in clause ELECTROMAGNETIC ANTI-INTERFERENCE PERFORMANCE Electrostatic discharging anti-interference degree The unit meets the test of electrostatic discharging anti-interference degree 4 specified in GB/T (idt IEC61000) Radio frequency electromagnetic field radiation anti-interference degree The unit meets the test of radio frequency electromagnetic field radiation anti-interference degree 4 specified in GB/T (idt IEC61000) Electric rapid instantaneous pulses anti-interference degree The unit meets the test of electric rapid instantaneous pulses anti-interference degree 3 specified in GB/T (idt IEC61000) Surge impact anti-interference degree The unit meets the test of surge impact anti-interference degree 3 specified in GB/T (idt IEC61000) 3.5 MECHANICAL PERFORMANCE Vibration The unit meets the vibration response test of degree 1 specified in clause 16.2 of GB/T Impact The unit meets the impact response test of degree 1 specified in clause 17.4 of GB/T Collision The unit meets the collision response test of degree 1 specified in clause 18 of GB/T tec P CK010 Self-Powered V 4.F Page 7.

8 3. PRODUCT SELECTION DESCRIPTION Communication port selection S C 0 1 x x x x x x x N S no coms port RS-485 R External input contact power suppy selection S1 internal power supply (DC24V) Tripping coil voltage selection code D1 DC220V D2 DC110V D3 DC48V D4 DC24V Rated current code of CT secondary side 1 1A 5 5A Company name Product code System frequency selection 50 50Hz 60 60Hz For example, The unit is used in 50Hz system. The rated current of current transformer secondary side is 1A. the internal power supply 24V is selected for switch quantity input (Dry contact input). The tripping coil voltage is 24V. RS485 is not used. The ordering type is CK D4 S1 N 4 FUNCTION CONFIGURATION 4.1 PHASE CURRENT TWO ZONE DEFINITE TIME PROTECTION Two-zone time definite protection includes time definite rapid breaking and time definite overcurrent. The unit checks three phase current. The unit outputs tripping signal after settable time delay when a current is more than the current setting. Two zones of protection shall selects separately on or off. The current setting and time setting may be set separately. The protection operation curve is seen in Fig tec P CK010 Self-Powered V 4.F Page 8.

9 4.2 PHASE CURRENT INVERSE TIME PROTECTION The phase current Inverse time protection provides three curves for selection, i.e., o Normal inverse time, o Very inverse time and o Extremely inverse time. Long time invers is not supported by the CK010 relay. tec P CK010 Self-Powered V 4.F Page 9.

10 4.3 ZERO-SEQUENCE DEFINITE TIME PROTECTION One-zone zero-sequence definite time protection is used to check the ground current for neutral point insulation or compensation system. The capacitive current is more heavy in long cable system. Because the zero-sequence current of indirectly grounded system is less, it required that the unit measures the zero-sequence in higher accuracy, so the ratio of zero sequence current transformer shall be selected more carefully. Zero sequence time definite protection may be selected to throw in or drop out. The current setting and time setting may be set separately. 4.4 ZERO SEQUENCE INVERSE TIME PROTECTION The zero sequence inverse time protection provides three curves for selection, i.e., normal inverse time, very inverse time and extremely inverse time. Time-current equation of three curves and curve characteristic is as the same as phase current inverse time protection. 4.5 EXTERNAL CONTACT TRIP DIRECTLY The unit has two switch inputs circuits. The inputs is internally powered - (Only dry contacts input required from tripping devices). Both of switch inputs are connected directly to the trip output. The trip time delay may be set. It is used normally for Transformer Bucholtz Temp trip Explosion or expansion trip.. Throw-in or drop-out is selected with a keypad. 4.6 HEAVY CURRENT BLOCK TRIP Mainly used for (Load Break Switches) This function is used mainly for load switch + fuse. Because the load switch has not ability to break short-circuit current, the unit shall block all of protection functions (including external contact trip directly) if the load current is more than set block current when this function is started. The fault is cut off by the fuse to assure that the load switch is not damaged. This configuration may meet requirements of short-circuit fault cut off and overload cutoff to make protection function fully perfect. This function must be canceled when a breaker is used. 4.7 PASIVE TRIP OUTPUT CONFIGURATION The unit has output Trip Terminals. Contacts are potential free contacts These contacts are latching and needs to be reset from the HMI buttons. 4.8 Tripping Contacts Terminals 17 and 18 is used to drive tripping. When active pulse output is selected, the unit may supply 24V~220V, 10A (the highest) short time pulse energy, which repeats output in interval of 250ms to ensure the breaker off. tec P CK010 Self-Powered V 4.F Page 10. F

11 4.9 EVENT RECORD To do the settings or look at event detail without Aux Power and the breaker open please see: 7.3 The unit may record 100 historic events, including various events, such as overcurrent protection operation, switch quantity input position change, equipment fault, etc. Each of records contains informations of event time (in ms), various relative ac input values, switch quantity input status, etc. The event information is not lost when the unit is powered off because event information is recorded in FLASH chip. The event records are stored in successive order of happening time. When the events are more than 100, the unit covers automatically and successively the oldest record with the newest record. Each of event records may be watched on the LCD of the unit. 5 STRUCTURE, INSTALLATION AND WIRING 5.1 STRUCTURE AND INSTALLATION Front board layout The front board is made of aluminum alloy. In the front Board, is fixed a LCD window, a keypad, a run indicator, and DB9 debugging communication port. Where, 1 LCD 2 up/plus 1 3 left 4 right 5 down/reduce 1 6 exit 7 enter 8 indicator 9 communication port 1 (Not used in this unit) 5.2 Outline structure The unit is housed in a seal aluminum alloy case. There are two optional cases. One is upright, the other is horizontal. The outline dimensions of both cases are same and the direction is not same. The upright unit (L type) is mounted directly in the panel and the horizontal unit (H type) is embedded in panel door. Fig 1.1 outline dimensions Fig 1.2 directly mounting diagram tec P CK010 Self-Powered V 4.F Page 11.

12 Fig 1.3 surface mounting cutout dimensions Fig. 1.4 surface mounting diagram 5.3 WIRING The unit provides two terminal wiring schemes This one is for the unit powered from external power supply. Where, AC input of the current transformers 2D-1~6 Terminals for empty phase shall be shorted. 2D-17 2D-18 is of for trip pulse output in figures. DC24V~DC48V is input to 1D-13 1D-14 from external power, only used for debugging and setting to save the energy of the battery. Internal supplied DC 24V is supplied to 2D-9 2D-10 2D-11 for external tripping signals Figure 5-1 Wiring diagram With Aux power tec P CK010 Self-Powered V 4.F Page 12.

13 5.3.2 The other, shown in Fig. 5.7, is for self-supply power system. Where For self-power mode,ct input (1D-3~4 1D-6~7 1D-9~10) supplying power to the unit The Current transformers is connected to 2D terminals 1 to 6. But the output capacity of the transformer shall be considered the power to start the unit is 0.5VA. Figure 5-2 Wiring diagram No Aux power tec P CK010 Self-Powered V 4.F Page 13.

14 6 UNIT PARAMETER SETTING DESCRIPTION There two kinds of parameters set in the unit. System parameter, and the other is of Setting parameter. These two kinds of parameters are set separately in parameter menu and setting menu. 6.1 SYSTEM PARAMETER Before the unit is put into operation, the system parameter is input correctly to ensure the unit serves normally. The system parameter includes System password The system password is used for operation authorization of the protection unit. The correct password is input when entering into parameter menu and setting menu to revise the parameter. The operation password preset before the unit leaves the factory is The setting range of the system password is 0000~9999. The revised value shall be remembered well after the system password is revised. Otherwise, you cannot enter into above menus to revise the parameter CT ratio CT ratio is primary/secondary ratio of a phase current transformer. The correct CT ratio is input before the unit is used because the unit shows the current value of primary currents Communication address (IF fitted or applicable) The unit communication port 2 (rear terminal bus port) is of RS 485 bus communication mode. The communication address is identification of bus communication unit. In order to ensure that the communication is normal, each of communication addresses connected unit with the bus must be unique. 0000~0254 The address setting range is Baud rate The baud rate is a communication rate parameter of the unit. The optional communication baud rate includes 1200bps, 2400bps, 4800bps, 9600bps, 14400bps, 19200bps. The baud rate of unit on a bus must be kept consistent. This parameter is for the baund rate of communication port 2 (rear terminal bus port). 6.2 PROT SETTING PARAMETER The protection setting parameter includes the required control parameter of the protection function and set correctly according to chapter 4. No Setting Description 1 Heavy current block trip selection Keypad setting, able to select ON or OFF. 2 Block current Current setting, setting range: 0~20 In Protection function Used together with fuse or (LBS) 3 Instantaneous trip protection selection Keypad setting, able to select ON or OFF. 4 Instantaneous trip protection current Current setting, setting range: 0~20 InI Instantaneous trip protection 5 Instantaneous trip protection time Time setting, setting range: s~600.00s tec P CK010 Self-Powered V 4.F Page 14.

15 6 7 8 Phase current definite time overcurrent selection Phase current definite time overcurrent current Phase current definite time overcurrent time Keypad setting, able to select ON or OFF. Current setting, setting rang: 0~20 In Time setting, setting range: s~600.00s Phase definite overcurrent current time 9 Phase current inverse time selection Keypad setting, able to select ON or OFF. Phase current inverse Characteristic selection setting, able to select 10 time characteristic normal inverse time, very inverse time, Phase current selection extreme inverse time inverse time 11 Phase current inverse time current Current setting, setting range: 0~20 In protection 12 Phase current inverse time factor Time factor setting, setting range: 00.05~ Zero sequence time definite overcurrent selection Zero sequence time definite overcurrent current Keypad setting, able to select OFF or WARN or TRIP. Current setting, setting range: 0.000~9.999A Zero sequence definite time overcurrent 15 Zero sequence time definite overcurrent time Time setting, setting range: s~600.00s 16 Zero sequence inverse time selection Keypad setting, able to select ON or OFF. Zero sequence inverse Characteristic selection setting, able to select 17 time characteristic normal inverse time, very inverse time, Zero sequence selection extreme inverse time inverse time 18 Zero sequence inverse time current Current setting, setting range: 0.000~9.999A protection 19 Zero sequence inverse time factor Time factor setting, setting range: 00.05~ DI trip selection Keypad setting, able to select ON or OFF. External contact 21 DI trip time Time setting, setting range: s~600.00s direct trip 7 HUMAN-COMPUTER INTERFACE OPERATION The unit has two human-computer interface operation modes. The one is a human-computer interface of the unit, including signal indicator, keypad, large LCD. The other is to carry out human-computer mutual operation by use of background debugging assistant software. ( settings on the relay front screen and buttons) The human-computer interface operation of the unit is only mentioned in this chapter. 7.1 SIGNAL INDICATOR There is a two - color LED screen on the front panel - to the debugging communication port s left on the lower side of the front board, having two indication modes. tec P CK010 Self-Powered V 4.F Page 15.

16 The one is heartbeat mode when the unit is operating normally. The other mode is when a condition of protection pick-up is monitored. These two modes may be switched over automatically to indicate different operation status of the unit. Heartbeat: The heartbeat mode indicates that the unit operates normally. Green LED flashes like heartbeat in period of 1s. Call Mode The call mode indicates that the unit sends a protection pickup signal. Red LED constant light. The indicator is in the heartbeat mode when the unit is powered on. The indicator enters automatically into the call mode when the unit sends a protection signal. The call mode is kept after the protection signal disappears until a button is pressed down on the front board. And then the indicator returns automatically to the heartbeat mode. 7.2 KEYPAD On the front board of the unit, there are 6 keypads, i.e., ENT (enter), ESC (escape), /+(up shift/plus 1), /- (down shift/reduce 1), (left shift) and (right shit). 7.3 Power-Up without aux power and no current flowing About how to power on the protection relay, please press the two buttons at the same time showed pic below The UP and Down Button simultaneously 7.4 LCD The main menu is shown in layers in LCD, including five function menus, i.e., The different menus are introduced separately as follows Operation menu When the unit is powered normally, LCD enters in to the operation menu automatically. On the LCD, there are 6 rows to show real-time monitoring ac value (primary value) of the protection unit. The lowest row shows system time of the unit. Shown in fig. 7.2, LCD automatically renew data at an interval of 1s. The menu has 2 pages to be turned automatically at an interval of 10s or turned over by us of /+ key and /- key Main menu In operation menu, ENT key is pressed down to enter main menu. Main menu Picture is shown in fig.7.3. <MEASUREMEN TS> I1: A I2: A I3: A Fig7.2 Main <MENU> PROT DATA SYS Parameters PROT Settings tec P CK010 Self-Powered V 4.F Page 16. Fig7.3 Main

17 The main menu contains sampling, parameter, setting, event, Clock. The required menu is selected by /+ key or /- key. The black area is the position that the cursor is at. ENT key is pressed down to enter into the submenu that the cursor points to Sampling menu The sampling menu show analog value sampling value, which is secondary value SYS Parameter menu LCD firstly shows show and set after entering into parameter menu from main menu. show is selected to enter parameter setting into the system but it is not applied to the relay as yet. This is to verify the correctness of the settings values. If set is selected, the parameter may be entered or updated to the relay after inputting a correct password. SYS Parameters SHOW SET Fig7.4 show/set Input Password: 0000 show and set is selected by use of /+ key or /- key. ENT key is pressed down to enter. When inputting password, the digit position is selected by use of key or key and then value is input by use of /+ key or /- key. ENT key is pressed down to enter operation password. Fig7.5 Input When revising system parameter, the parameter for revision is selected by use of /+ key or /- key. ENT key is pressed down to enter into revision status. The digit position is selected by use of key or key and then value is input by use of /+ key or /- key. After a value has been input, ENT is pressed down to shift a cursor to parameter selection status in order to select next parameter for revision. Finally, ESC key is pressed down to escape from revision operation, save parameter and escape from parameter menu Prot Settings menu The operation procedure of setting menu is the same as system menu. look and setting is firstly selected and then an operation password is input to enter into setting menu. The highest row indicates protection function that the watched setting belongs to. The lowest row indicates setting number/setting totality Report display menu Address: 001 Baudrate: 9600 Password: **** CT Ratio: 0001 Fig7.6 INST. Trip tec P CK010 Self-Powered V 4.F Page 17. SYS Parameters menu Inst. PROT Selection: Off (01/21) Fig7.7 PROT Settings menu No :24:15 083ms Fig7.8 Report display menu

18 Enter into event record menu, shown in fig.7.8. The unit records and displays the newest 100 events with clock marker in ms. Each of records is divided into two frame. The one displays event type and time marker. The other displays various ac values of events. Each of records is watched by use of /+ key, /- key. Two forms of the same record are turned over each other by use of key Set Clock menu The operation password is input correctly to enter into clock menu and revise the system clock. The digit position is selected by use of key or key and then value is input by use of /+ key or /- key. After revision has been finished, ENT is pressed down to confirm revision. The LCD displays year month day; hour:minute:second Attention: _DATE_ _TIME_ 03:40:44 Fig7.9 Set Clock menu In order to ensure that the protection of the unit doesn t miss-operate during revising various parameters, all protection functions of the unit drop out automatically when the human-computer interface enters into revision status of various parameters (including system parameter, setting parameter). So the unit is returned to the main menu or operation menu in time after the parameter has been revised to ensure that the protection function is thrown in without delay. There is a high-energy backup battery inside the unit capable to meet operation power requirement when there is not any power supplied to the unit externally. The unit is in low power consumption active standby operation status when the power line cannot supply enough energy to the unit. The unit may be called to operation at any time by use of the front board key. The standby batter is of high performance maintenance-free lithium cell, may operate at least for 15 years under the normal condition. 8 PROTECTION SETTING DESCRIPTION To do the settings without Aux Power and the breaker open please see: 7.3 The protection setting has nothing to do with CT ratio of the system parameter. The protection setting must be set according to the secondary current when setting in accordance with actual ratio (for example, 30/50A) of a line. For example, The intelligent protection unit is set as follows for the unit used in a line, in which, the transformer is of 500kVA, 12kV voltage with 30/5A of actual CT ratio. The primary rated current is 24A and the secondary rated current is 4A. CT ratio is set at 6. The overcurrent protection setting is set according to 1.2 times, the current is 4.8A and the time is 0.5s. The rapid break protection setting is set 5 times, the rated current is 20A and the time is 0s. 9 PROTECTION TEST DESCRIPTION 9.1 The system wiring is shown in Figure 5-1 Wiring diagram With Aux power Figure 5-2 Wiring diagram No Aux power 9.2 TEST METHOD Primary current fault simulation test If there is a heavy current generator on the test spot, the primary current fault is simulated to test. A heavy current is applied to the primary side of CT. tec P CK010 Self-Powered V 4.F Page 18.

19 The protection secondary current is input into terminals 2D1-2, 2D3-4, 2D5-6. The power supply is input into terminals 1D3-4,1D6-7,1D9-10. The following is tested. * Primary current value of CT when starting protection unit A current is applied to the primary side of CT. The current rises from 0A until the operation indicator of protection unit lights and LCD lights to show data. The primary current value of CT is record at this time. Warning: It is better that is not over 10% of CT ratio. It is proposed to replace a qualified CT when it is over 20% of CT ratio. * Protection test Primary injection A current is applied to the primary side of CT. The current rises from 0A until the protection picks up and breaker trips. The primary current value of CT is record at this time. Compare with protection setting, it is better that the error is not more than 5%. It is proposed to replace the protection unit when error is more than 5% Protection test Secondary injection If there is not any heavy current generator on the test spot, the secondary current fault is simulated to test. The secondary current of the protection is input directly to terminals 2D1-2, 2D3-4, 2D5-6 of the protection unit. The power is supplied to the unit at first. The method is as follows. Method 1: DC 24V (or 48V) is applied to 1D13 (+power) and 1D14 (-power) of the unit. The unit may operate normally. At this time, the operation indicator of the protection unit lights and LCD lights to show data. Method 2: AC 20~30V votage is applied across any of 1D3-4, 1D6-7, 1D9-10 of the unit. The unit may operate normally. At this time, the operation indicator of the protection unit lights and LCD lights to show data. Warning : A heavier AC current ( above 5A ) is not applied to any of 1D3-4, 1D6-7, 1D9-10 of the unit. If not, the unit is burnt probably. * the protection is tested after the power is supplied to the unit correctly The secondary current of the protection is input to terminals 2D1-2, 2D3-4, 2D5-6 of the protection unit. The current rises from 0A until the protection picks up and breaker trips. The primary current value of CT is recored at this time. Compare with protection setting, it is better that the error is not more than 5%. It is proposed to replace the protection unit when error is more than 5%. To do the settings without Aux Power and the breaker open please see: 7.3 tec P CK010 Self-Powered V 4.F Page 19.