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GWZC-9000 Power measurement and control panel
GWZC-9000 Power measurement and control panel
GWZC-9000 Power measurement and control panel

Application Scope: The Power measurement and control panel is a critical device in substation automation systems, used for real-time monitoring and control of station auxiliary equipment (such as DC systems, station service power, fire protection, etc.). It features data acquisition, communication, alarm, and remote control functions (compliant with IEC 61850 standard).

Product functions(ANSI):27 | 59 | 81U | 81O | 60

Communication protocols : ​IEC 60870-5-101/103/104 ,IEC 61850(MMS/GOOSE/SV), Modbus RTU​ & ​Modbus TCP​,RJ-45 , RS-485
Function Description : The Power measurement and control panel features analog measurements (voltage/current), 84-126 teleindication channels, 20-80 telecontrol groups, and expandable DC measurement up to 18 channels.

Product Introduction Technical Parameter Size

Power measurement and control panel Introduction

          The Power measurement and control panel P&C panel )​​ is a centralized device used in substations and power systems for real-time monitoring (voltage, current, power), remote control of breakers/switches, and data communication via protocols like IEC 61850 and Modbus. It integrates with SCADA systems, records events (SOE), and generates alarms for abnormal conditions, typically installed in control rooms or distribution panels to enhance grid automation and operational efficiency.

Power measurement and control panel Functions

1.PT Disconnection Alarm (ANSI 60)
2.Zero-Sequence Voltage Alarm (ANSI 59N)
3.Synchronizing Check (ANSI 25)
4.Three-Phase Voltage Measurement (ANSI 59)
5.Zero-Sequence Voltage Measurement (ANSI 59N)
6.Synchronizing Voltage Measurement (ANSI 25)
7.Three-Phase Current Measurement (ANSI 50/51)
8.Zero-Sequence Current Measurement (ANSI 50N/51N)
9.Status Indication (ANSI 94)
10.Remote Control (ANSI 94)
11.DC Measurement (ANSI 94)
12.Time Synchronization (ANSI 94)
13.Communication Test (ANSI 94)
14.Telemetry Setting (ANSI 94)

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Automatic Transfer Switch (ATS) Side View
What is Parallel Operation
​Parallel operation​ involves connecting two or more independent AC power sources (e.g., generators, grids) to share electrical loads seamlessly. This process—synchronization—demands precise matching of voltage magnitude, frequency, and phase angles between systems before interconnection. Critical for grid expansion, backup power, and renewable integration, it enables redundant supply during failures.
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Generator-Transformer Differential Protection Relay Rear View
Ring-Closing Operation: Definition & Importance in Power Grids
A ring-closing operation involves closing a normally open switch within a closed-loop electrical network fed by a single power source. This creates parallel paths to redistribute loads without interruption, primarily for maintenance or network reconfiguration. Key prerequisites are voltage difference under 5%, phase angle alignment below 5 degrees, and pre-calculation of induced circulating currents to avoid equipment damage. Distinct from connecting independent systems, this procedure requires advanced monitoring but avoids synchronization complexity. Strict protocols using real-time sensors and simulations ensure safe execution, making it fundamental for resilient distribution networks like ring-main units (RMUs) in urban grids.
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Synchronism Check Function vs. Synchronizing Function: Roles, Differences, and Applications
This article compares the ​synchronism check function​ in line protection devices and the ​synchronizing function​ in dedicated synchronizing equipment. The ​synchronism check function​ serves as a safety interlock for circuit breaker closing operations, while the ​synchronizing function​ enables precise generator synchronization and critical tie-line interconnections with active parameter regulation. Explore core principles, application scenarios, and technical distinctions between these critical power system components.
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GWZC-9000 Power measurement and control panel
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