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LOSS OF MAINS PROTECTION RELAY - SINGLE PHASE 2-WIRE SYSTEM

LOSS OF MAINS PROTECTION RELAY - SINGLE PHASE 2-WIRE SYSTEM

LOSS OF MAINS PROTECTION RELAY - SINGLE PHASE 2-WIRE SYSTEM

Product catalog summary
Overview: The KCG591E is a self-contained loss of mains protection relay for single-phase 2-wire systems, ensuring precision protection against malfunctions during loss of mains conditions, compliant with standards like G59/2.
Specifications: The unit is self-powered from monitored voltage input, with optional auxiliary voltages of 24, 110VDC. It supports voltage inputs of 100-120, 200-240, 380-415, or 440-460VAC at 40-70Hz, with a frequency range of 45-65Hz. It features latching relays with auto-reset options and is housed in a flame-retardant polycarbonate enclosure with IP41 front protection.
Protection Features: The KCG591E provides two-stage over and under voltage and frequency protection, rate of change of frequency (ROCOF), and vector shift protection, suitable for single or multiple generators connected to a utility grid.
Operation and Control: Controlled via auxiliary contacts on generator and mains breakers, with LEDs and open collector outputs indicating operating mode and trip cause. Programmable using Megacon's HHP1 or HHP2 for parameter adjustments and event log viewing.
Programming and Settings: User-adjustable parameters include nominal voltage, frequency, ROCOF, vector shift, and supervision delay. Default settings are provided, but final settings should be agreed with the electricity supply authority.
Protection Principles: Utilizes vector shift and ROCOF detection to identify mains failures. Vector shift protection is sensitive to changes in the generator rotor's lead angle, while ROCOF monitors frequency changes due to load variations.
Limitations and Recommendations: May not operate with minimal load change during mains interruption. Recommended that generators export 10-20% of power to the grid for reliable operation, with a governor speed droop of around 5% for effective detection.
Introduction: Discusses operational characteristics and potential issues of the KCG591E, emphasizing the importance of fine-tuning generator settings to prevent spurious tripping and ensure stable operation.
Potential Problem Areas: Spurious Tripping: Occurs when the relay trips due to generator characteristics despite stable mains. Load Management: Large loads can cause the generator to respond quicker than the grid, requiring adjustments in response and ramp rates.
Recommendations: Fine-tune generator's response and ramp rates for disturbances. For large load demands, progressive connection/disconnection of loads is advised to prevent vector shifts. Inhibiting the KCG591E during large load switching may be necessary.
Technical Specifications: Type: KCG591E, Nominal Voltage: 230V, Protection: G59 Protection (Loss of mains), Configuration: R2 and R3 are fail-safe configured, Power Supply: DC (24, 110VDC) and AC (all ranges).
Connection Diagram: Includes a diagram illustrating the setup for the KCG591x with open collector outputs and necessary configuration for relays and breakers.
Ordering Information: Provides an example for ordering the KCG591E, noting the company's policy of continuous improvement, which may result in variations in equipment details.
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Catalog excerpts

LOSS OF MAINS PROTECTION RELAY - SINGLE PHASE 2-WIRE SYSTEM-1

Microsoft Word - 9000_607_39GB.doc table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.00pt "Arial", sans-serif; } .font1 { font:7.00pt "Arial", sans-serif; } .font2 { font:8.00pt "Arial", sans-serif; } .font3 { font:11.00pt "Arial", sans-serif; } .font4 { font:12.00pt "Arial", sans-serif; } .font5 { font:15.00pt "Arial", sans-serif; } .font6 { font:26.00pt "Arial", sans-serif; } .font7 { font:8.25pt "Arial Black", sans-serif; } .font8 { font:11.00pt "Tahoma", sans-serif; } KCG591x LOSS OF MAINS PROTECTION RELAY - SINGLE PHASE 2-WIRE SYSTEM All-in-one unit, the COMPLETE solution G59/2 Loss of Mains Protection Adjustable Supervision Delay Cause of Trip LEDs and Event Log Digitally Controlled Operation Tamper Proof configuration via the HHP1/HHP2 or via PC(HHP2only) Spcifications Self powered from monitored voltage input 24,110VDC_ Description The fully self-contained KCG591E provides prcision protection against malfunction and human and operational hazards under loss of mains conditions. The DIN rail mounted digitally controlled unit meets the protection requirements for generators connected to mains supply, such as defined in the G59/2 and similar recommendations. Less wiring, no extra modules. Operating mode is selected by simple auxiliary contacts on the generator breaker and on the mains breaker. LEDs and open collector outputs indicate operating mode and "First Up" cause oftrip. State-of-the-art digital technology throughout, with quartz-controlled Loss of Mains detection. True RMS measurements. Loss of Mains Protection KCG591E will provide the following protection: - 2 stage Overand UnderVoltage - 2 stage Overand Under Frequency - Rate of Change of Frequency ( ROCOF, df/dt) - Vector Shift (step phase angle) Auxiliary Voltage: Optional Auxiliary Voltage:_ Monitored Voltage input:_ 100-120, 200-240, 380-415 or 440-460VAC,4Cl70Hz Frequency Range: 45-65Hz RelayStandard: Latching relays as standard. User selectable to 3-180sec auto resetofalarms Contact Rating: AC: DC: 100VA-250V/2Amax. 50W-100V/1Amax. Open Collector Outputs:_ 30V DC max.- 500mA max. Settings: See page 4and5 Internal Watchdog: An independent watchdog monitors signal flow. Flashing ofLEDs1, 2 and3 in a binary pattern indicate operational Dielectric test/ Galvanic separation: error 4.0kVAC Climate: Class HUE, (DIN40040) Temperature: -20to+70°C Weight: 0.5kgs Front protection: IP41 Enclosure: Flame retardant polycarbonate to UL94 (VO) _ The unit meets IEC60093-504 and the relevant environmental and EMC tests specified in IEC60068/60092 and IEC61000/60533 respectively. Page 1 of 8 mCQQCOn Norway - UK

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LOSS OF MAINS PROTECTION RELAY - SINGLE PHASE 2-WIRE SYSTEM-2

Microsoft Word - 9000_607_39GB.doc table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:4.00pt "Arial", sans-serif; } .font1 { font:5.00pt "Arial", sans-serif; } .font2 { font:6.00pt "Arial", sans-serif; } .font3 { font:7.00pt "Arial", sans-serif; } .font4 { font:8.00pt "Arial", sans-serif; } .font5 { font:9.00pt "Arial", sans-serif; } .font6 { font:10.40pt "Arial", sans-serif; } .font7 { font:25.00pt "Arial", sans-serif; } .font8 { font:26.00pt "Arial", sans-serif; } .font9 { font:8.25pt "Arial Black", sans-serif; } .font10 { font:11.00pt "Tahoma", sans-serif; } KCG591x...

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LOSS OF MAINS PROTECTION RELAY - SINGLE PHASE 2-WIRE SYSTEM-3

Microsoft Word - 9000_607_39GB.doc table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:4.00pt "Arial", sans-serif; } .font1 { font:5.00pt "Arial", sans-serif; } .font2 { font:6.00pt "Arial", sans-serif; } .font3 { font:7.00pt "Arial", sans-serif; } .font4 { font:8.00pt "Arial", sans-serif; } .font5 { font:9.00pt "Arial", sans-serif; } .font6 { font:13.00pt "Arial", sans-serif; } .font7 { font:17.00pt "Arial", sans-serif; } .font8 { font:21.60pt "Arial", sans-serif; } .font9 { font:23.00pt "Arial", sans-serif; } .font10 { font:25.00pt "Arial", sans-serif; } .font11 {...

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LOSS OF MAINS PROTECTION RELAY - SINGLE PHASE 2-WIRE SYSTEM-4

Microsoft Word - 9000_607_39GB.doc table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:4.00pt "Arial", sans-serif; } .font1 { font:5.00pt "Arial", sans-serif; } .font2 { font:6.00pt "Arial", sans-serif; } .font3 { font:7.00pt "Arial", sans-serif; } .font4 { font:8.00pt "Arial", sans-serif; } .font5 { font:9.00pt "Arial", sans-serif; } .font6 { font:25.00pt "Arial", sans-serif; } .font7 { font:26.00pt "Arial", sans-serif; } .font8 { font:32.00pt "Arial", sans-serif; } .font9 { font:8.25pt "Arial Black", sans-serif; } .font10 { font:11.00pt "Tahoma", sans-serif; } KCG591x...

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LOSS OF MAINS PROTECTION RELAY - SINGLE PHASE 2-WIRE SYSTEM-5

Microsoft Word - 9000_607_39GB.doc table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:7.00pt "Arial", sans-serif; } .font1 { font:8.00pt "Arial", sans-serif; } .font2 { font:12.00pt "Arial", sans-serif; } .font3 { font:26.00pt "Arial", sans-serif; } .font4 { font:8.25pt "Arial Black", sans-serif; } .font5 { font:11.00pt "Tahoma", sans-serif; } KCG591x LOSS OF MAINS PROTECTION RELAY - SINGLE PHASE 2-WIRE SYSTEM Opration Setting the user adjustable parameters The final settings for KCG591E should ideally be subject to agreement between the electricity supply authority...

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LOSS OF MAINS PROTECTION RELAY - SINGLE PHASE 2-WIRE SYSTEM-6

Datasheet_KSQ332EJD1 (rev 1.0... - pdfMachine from Broadgun Software, http://pdfmachine.com, a great PDF writer utility! table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:7.00pt "Arial", sans-serif; } .font1 { font:8.00pt "Arial", sans-serif; } .font2 { font:10.00pt "Arial", sans-serif; } .font3 { font:25.00pt "Arial", sans-serif; } .font4 { font:8.60pt "Arial Black", sans-serif; } KCG591x LOSS OF MAINS PROTECTION RELAY - SINGLE PHASE 2-WIRE SYSTEM Loss of Mains Protection The Loss of Mains protection is provided with two separate protection circuits and these protection...

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