INSTRUCTION MANUAL TRIP CIRCUIT SUPERVISION RELAY GKAD1

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1 INSTRUCTION MANUAL TRIP CIRCUIT SUPERVISION RELAY GKAD1 TOSHIBA Corporation 2004 All Rights Reserved. ( Ver. 1.6 )

2 Safety Precautions Before using this product, please read this chapter carefully. This chapter describes the safety precautions recommended when using the GKAD1. Before installing and using the equipment, this chapter must be thoroughly read and understood. Explanation of symbols used Signal words such as DANGER, WARNING, and two kinds of CAUTION, will be followed by important safety information that must be carefully reviewed. DANGER WARNING CAUTION CAUTION Indicates an imminently hazardous situation which will result in death or serious injury if you do not follow the instructions. Indicates a potentially hazardous situation which could result in death or serious injury if you do not follow the instructions. Indicates a potentially hazardous situation which if not avoided, may result in minor injury or moderate injury. Indicates a potentially hazardous situation which if not avoided, may result in property damage. 1

3 WARNING Exposed terminals Do not touch the terminals of this equipment while the power is on, as the high voltage generated is dangerous. Residual voltage Hazardous voltage can be present in the DC circuit just after switching off the DC power supply. It takes approximately 30 seconds for the voltage to discharge. CAUTION Operating environment The equipment must only used within the range of ambient temperature, humidity and dust detailed in the specification and in an environment free of abnormal vibration. Ratings Before applying DC voltage to the equipment, check that they conform to the equipment ratings. Connection cable Carefully handle the connection cable without applying excessive force. Unit Do not disassemble the unit, as this may cause the unit to be damaged. Modification Do not modify this equipment, as this may cause the equipment to malfunction. Disposal When disposing of this equipment, do so in a safe manner according to local regulations. 2

4 Contents Safety Precautions 1 1. Introduction 4 2. Application and Function Application Function Connections 7 3. Hardware Structure 9 4. Installation Receipt of Relays Mounting Electrostatic Discharge Handling Precautions Commissioning and Maintenance 11 General Precautions Preparation Storage 11 Appendix A 13 Outline Diagram 14 Appendix B 15 Technical Data 16 Appendix C 19 Ordering 20 The data given in this manual are subject to change without notice. (Ver.1.6) 3

5 1. Introduction The GKAD1 is a trip circuit supervision relay, and is provided the following features: - Trip circuit supervision in both closed and open positions of circuit breaker - Detection and alarm of trip circuit supply failure and of circuit breaker tripping mechanism failure - Single-phase or three-phase types available - Compact size design - Flush mounting 4

6 2. Application and Function 2.1 Application The GKAD1 is used for monitoring of the circuit breaker tripping circuit. The GKAD1 issues an alarm if the GKAD1 detects trip circuit supply failure or circuit breaker tripping mechanism failure. The GKAD1 has two models as shown in Table 2.1. Table 2.1 GKAD1 Models Model GKAD1-12 GKAD1-22 Configuration Single-phase type Three-phase type 2.2 Function The GKAD1 monitors the circuit breaker tripping control, and Figure 2.1 shows a typical scheme. When the trip circuit is complete, a small current flows in photo-couplers PC1 and/or PC2, the circuit breaker auxiliary contacts and the trip coil. This current flows for both the breaker open and closed conditions. Trip circuit ( + ) Protection relay 1 3 GKAD1 Resistor PC1 Target Indicator (Hand reset type) D PC2 1 1 t 0 0 t a 52b CB coil ( ) LCP & GIS 18 Figure 2.1 Trip Circuit Supervision Scheme (1) If the trip circuit supply is lost or if a connection becomes open circuit then the GKAD1 issues a trip circuit fail alarm and operates the target indicator. As for the sensitivity, the detection voltage and detection current are 40V or less and 1.5mA or less. Figure 2.2 shows the special application of GKAD1 relay. This scheme ensures that all trip circuit wiring (tripping route) from the trip contact to the trip coil is supervised in either the breaker closed or open condition. At CB closed condition, the monitoring current flows in photo-coupler PC1. On the other hand, at CB open condition, the monitoring current flows in photo-couplers PC1 and PC2 via tripping cable and CB auxiliary contact 52b. Under both CB conditions, if tripping route/trip coil is disconnected, the monitoring current is interrupted and both PC1 and PC2 are off and the GKAD1 issues alarm. 5

7 Trip circuit ( + ) Protection relay 1 3 GKAD1 Resistor PC1 Target Indicator (Hand reset type) D 13 2 PC2 1 1 t 0 0 t a 52b CB coil ( ) LCP & GIS 18 Figure 2.2 Trip Circuit Supervision Scheme (2) Output Contacts The GKAD1 provides a normally close and two normally open contacts for the trip circuit fail alarm and a normally close contact for power supply fail alarm. (See Figures 2.3 and 2.4.) The detection sensitivity for power supply fail is less than 60V. 6

8 2.3 Connections The GKAD1 auxiliary supply input has a nominal 110/125Vdc rating or 220/250Vdc rating. The typical application and connection diagrams are shown in Figures 2.3 and 2.4. Figure 2.3 shows a single-phase application for GKAD1-12 and Figure 2.4 shows a three-phase application for GKAD1-22. The two resistors on the PC1, PC3 and PC5 photo coupler circuits are added as shown in Figure 2.3 and 2.4 below in consideration of the fail-safe of relay failure. The resistors can function to prevent unwanted tripping due to relay internal circuit failure under CB closed condition. CAUTION Do not connect anything to 5 th -12 th terminals in Figure 2.3. These are reserved in GKAD1-12. Trip circuit ( + ) GKAD1-12 Protection relay 1 Resistor PC1 Target Indicator (Hand reset type) ( ) 52a 52b CB coil LCP & GIS PC2 No connection (reserved) 1 1 t 0 0 t D (Note) The dotted line shows the scheme (2) mentioned in Figure 2.2. DC SUPPLY (+) (-) Voltage Regulator POWER SUPPLY FAIL Figure 2.3 GKAD1-12 Typical Application Diagram 7

9 Trip circuit (A phase) ( + ) GKAD1-22 Protection relay Monitor input circuit PC1 1 Resistor 3 Target Indicator (Hand reset type) A-phase 13 52a 52b 2 4 PC2 1 1 t 0 0 t D CB coil ( ) LCP & GIS 18 (Note) The dotted line shows the scheme (2) mentioned in Figure 2.2. Monitor input circuit PC3 5 7 B-phase Trip circuit (B phase) 6 PC4 1 1 t 0 0 t D 8 Monitor input circuit PC C-phase Trip circuit (C phase) 10 PC6 1 1 t 0 0 t D 12 DC SUPPLY (+) (-) Voltage Regulator POWER SUPPLY FAIL Figure 2.4 GKAD1-22 Typical Application Diagram 8

10 3. Hardware Structure The Figure 3.1 shows a hardware structure of GKAD1. The GKAD1-12 is a single phase type and has one target indicator. TRIP CIRCUIT SUPERVISION RELAY POWER TARGET INDICATOR TRIP CIRCUIT FAIL A-PHASE B-PHASE C-PHASE TARGET RESET LEVER (Push it left to reset Target) Figure 3.1 Front View of GKAD1-22 9

11 4. Installation 4.1 Receipt of Relays 4.2 Mounting On receiving the GKAD1 relays, carry out the acceptance inspection immediately. In particular, check for damage during transportation, and if any is found, contact the vendor. Always store the unit in a clean, dry environment. Refer to Appendix A for details of mechanical fixings. 4.3 Electrostatic Discharge CAUTION The printed circuit board (PCB) within the GKAD1 relay is not intended to be a removable module. Do not remove the PCB from the unit case, since electronic components on the PCB are very sensitive to electrostatic discharge. If it is absolutely essential to take the PCB out of the case, do not touch the electronic components and terminals with your bare hands. Additionally, always put the PCB in a conductive anti-static bag when storing it. 4.4 Handling Precautions A person's normal movements can easily generate electrostatic potential of several thousand volts. Discharge of these voltages into semiconductor devices when handling electronic circuits can cause serious damage, which often may not be immediately apparent but the reliability of the circuit will have been reduced. The electronic circuits are completely safe from electrostatic discharge when housed in the case. Do not expose them to risk of damage by removing the PCB unnecessarily. The unit incorporates the highest practicable protection for its semiconductor devices. However, if it becomes necessary to remove the PCB, precautions should be taken to preserve the high reliability and long life for which the equipment has been designed and manufactured. CAUTION Before removing the PCB, ensure that you are at the same electrostatic potential as the equipment by touching the case. Handle only the edges of the PCB. Avoid touching the electronic components, PCB surface or connectors. Do not pass the PCB to another person without first ensuring you are both at the same electrostatic potential. Shaking hands achieves equipotential. Place the PCB on an anti-static surface, or on a conducting surface which is at the same potential as yourself. Do not place the PCB in a polystyrene tray. It is strongly recommended that detailed investigations on electronic circuitry should be carried out in a Special Handling Area such as described in the IEC

12 5. Commissioning and Maintenance General 5.2 Precautions 5.3 Preparation Test personnel must be familiar with general relay testing practices and safety precautions to avoid personal injuries or equipment damage. CAUTION Ensure that the auxiliary supply connections are properly fixed to their terminals. Before turning on the power, check that the polarity and voltage of the power supply are correct. Turn off the auxiliary supply before checking the interior of the relay. While the power is on, do not mount/dismount the PCB. Failure to observe any of the precautions above may cause damage or malfunction of the relay. Refer to section 4.4 for information on handling precautions. 5.4 Storage Test equipment The following test equipment is required for the commissioning tests. DC power supply. Calibrated voltmeter. Visual inspection After unpacking the product, check for any damage to the case. If there is any damage, the internal module might also have been affected. Contact the vendor. Unit ratings Check that the items described on the nameplate on the front of the unit conform to the user s specification. The items are: relay type and model, and auxiliary DC supply voltage rating. The spare relay should be stored in a dry and clean room. Based on IEC Standard the storage temperature should be 25 C to +70 C, but the temperature of 0 C to +40 C is recommended for long-term storage. 11

13 12 6 F 2 S

14 Appendix A Outline Diagram 13

15 Outline Diagram Cover TB: M3.5 Ring terminal / Terminal Block(TB) Arrangement (Rear View) / 0 Panel cut-out GKAD1 Outline and Panel Cutout Diagram 14

16 Appendix B Technical Data 15

17 Technical Data Ratings DC auxiliary supply: 110/125Vdc (Operative range: Vdc), 220/250Vdc (Operative range: Vdc) Superimposed AC ripple on DC supply: 12% DC supply interruption: 50ms at 110V Function Trip circuit supervision Detection voltage: 40V or less for 110V/125Vdc 70V or less for 220V/250Vdc Detection current: 1.5mA or less for 110V/125Vdc 1.5mA or less for 220V/250Vdc Power supply fail Detection voltage: less than 60V Burden DC auxiliary supply: 2.5W Binary input circuit Output Contacts Number Ratings: Durability: 0.5W per input at 110/125Vdc (Current: 4mA at 110/125Vdc) 3: trip circuit fail alarm (2NO, 1NC) 1: power supply fail alarm Make and carry: 4A continuously Make and carry: 10A, 220Vdc for 0.5s (L/R=5ms) Break: 0.1A, 220Vdc (L/R=40ms) Make and carry: operations Break: operations Mechanical Design Weight Case colour Installation 1.5kg Munsell No. N1.5 Flush mounting Environmental Performance Test Standards Details Atmospheric Environment Temperature IEC /2 Operating range: -10 C to +55 C. Storage / Transit: -25 C to +70 C. Humidity IEC days at 40 C and 93% relative humidity. Enclosure Protection Mechanical Environment IEC60529 IP50 Vibration IEC Response - Class 1 Endurance - Class 1 Shock and Bump IEC Shock Response Class 1 Shock Withstand Class 1 Bump Class 1 Seismic IEC Class 1 16

18 High Voltage Environment Dielectric Withstand IEC High Voltage Environment High Voltage IEC Impulse Electromagnetic Environment High Frequency IEC Class 3, Disturbance / IEC Damped Oscillatory Wave Electrostatic Discharge Radiated RF Electromagnetic Disturbance IEC Class 3, IEC IEC Class 3, IEC kVrms for 1 minute between all terminals and earth. 2kVrms for 1 minute between independent circuits. 1kVrms for 1 minute across normally open contacts. Three positive and three negative impulses of 5kV(peak), 1.2/50μs, 0.5J between all terminals and between all terminals and earth. 1MHz 2.5kV applied to all ports in common mode. 1MHz 1.0kV applied to all ports in differential mode. 6kV contact discharge. 8kV air discharge. Field strength 10V/m for frequency sweeps of 80MHz to 1GHz and 1.7GHz to 2.2GHz. Additional spot tests at 80, 160, 450, 900 and 1890MHz. Fast Transient Disturbance Conducted RF Electromagnetic Disturbance Conducted Disturbance over freq. Range 15Hz to 150kHz Power Frequency Disturbance IEC , IEC IEC , IEC IEC Class 3 IEC kV, 2.5kHz, 5/50ns applied to all inputs. 10Vrms applied over frequency range 150kHz to 100MHz. Additional spot tests at 27 and 68MHz. Varying voltages applied in common mode as follows: 15Hz to 150Hz: 10V 1Vrms (20dB/decade) 150Hz to 1.5kHz: 1Vrms 1.5kHz to 15kHz: 1 10Vrms (20dB/decade) 15kHz to 150kHz: 10Vrms 300V 50Hz for 10s applied to ports in common mode. 100V 50Hz for 10s applied to ports in differential mode. Surge Immunity IEC /50μs surge in common/differential modes: PSU and I/O ports: 2kV/1kV (peak) Conducted and Radiated Emissions Power Frequency Magnetic Field IEC EN55022 Class A IEC Class 4 Conducted emissions: 0.15 to 0.50MHz: <79dB (peak) or <66dB (mean) 0.50 to 30MHz: <73dB (peak) or <60dB (mean) Radiated emissions: 30 to 230MHz: <30dB 230 to 1000MHz: <37dB Field applied at 50Hz with strengths of: 30A/m continuously, 300A/m for 1 second. 17

19 18 6 F 2 S

20 Appendix C Ordering 19

21 Ordering Trip Circuit Supervision Relay GKAD1 Type: Trip Circuit Supervision Relay GKAD1 Model: Single-phase type 12 Three-phase type 22 Monitored DC circuit voltage and DC auxiliary supply rating: 110V/125V V/250V 22 20

22 Version-up Records Version No. Date Revised Section Contents 0.0 Feb. 20, First issue. 0.1 May 19, Appendix B 1.1 Feb. 17, Appendix B 1.2 Dec. 06, Connections Appendix B 1.3 Jun. 05, Dec. 21, Appendices 1.5 Nov. 11, Appendix B. 1.6 Jun. 08, Modified the description. (Added the detection sensitivity of GKAD1.) Added the CAUTION. Added the detection sensitivity of GKAD1. Modified the description (sensitivity) and Figures 2.1 and 2.2. Modified Figures 2.3 and 2.4. Modified the description. Modified the description and Figures 2.3 and 2.4(resistor). Added Mechanical Design. Modified Figures 2.1 and 2.2. Modified the description and Figures 2.3 and 2.4. Modified the description. Modified Appendix B and added Appendix C Ordering. Modified the description. (detection sensitivity of power supply fail) ditto Modified Figures 2.1 and 2.2. Modified Figures 2.3 and

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