ZW32-12FG/630-20 User Boundary Controller (commonly known as "Watchdog")

1 Overview

ZW32-12FG/630-20 Outdoor Watchdog Vacuum Circuit Breaker Main applications and scope of use

When a fault occurs inside a user connected to a 10kV overhead distribution line via a T-junction, if the fault is on the incoming line section, or if the fault occurs inside the user's incoming switch but the protection operation time coordination with the substation outgoing switch protection is improper, it will cause the substation outgoing switch protection to trip. If the fault is permanent and the substation reclosing fails, an accident within a medium-voltage user's boundary will cause a power outage on the entire distribution line.

The ZW32-12F User Boundary Switch is a device designed to solve the above propagation accidents. Installed at the responsibility boundary point of 10kV overhead distribution lines, it can automatically remove single-phase earth faults and automatically isolate phase-to-phase short-circuit faults, ensuring the power safety of non-faulty users.

The user boundary switch controller is specially designed for intelligent control of the boundary switch body, implementing protection control functions and communication functions. The controller and the switch body are electrically connected through control cables and aviation connectors, realizing its protection and automatic monitoring functions. This product is widely applicable to users of 10kV overhead distribution lines in urban and rural areas. See Figure 1 for appearance.

Service Environment Conditions

• Product Quality Responsibility: Before putting the ZW32-12F/630-20 controller into operation, please read this manual carefully. We assume no responsibility for equipment damage caused by improper operation.

• Overcurrent Protection
• Three-time Reclosing
• Event Recording
• Inrush Current Protection
• Zero-sequence Protection
• Real-time Clock
• Reclosing Accelerated Trip
• Real-time Status Query
• Intelligent PDA Control
• Local/Remote Setting Value Configuration
• GPRS Communication

Controller Features

• Equipped with 485/232 communication interface, or remote monitoring via fiber optic or wireless; Reclosing accelerated trip function: when the switch recloses onto a permanent fault, it automatically accelerates tripping;
• Remote/Manual closing accelerated trip, and reclosing is locked: when users re-energize after line maintenance, if the earthing switch is forgotten to be removed, it should accelerate tripping;
• Three-time reclosing delay times are all adjustable;
• Opening and closing circuits adopt anti-misoperation design with anti-pumping function;
• Zero-sequence current can distinguish between internal and external faults;
• Remote opening and closing adopts anti-misoperation design.

Structural Features

a) The controller is a microcomputer-based relay protection and monitoring device;

b) The controller has strong weather resistance and anti-condensation protection;

c) Connected to the switch body via aviation connectors; d) Good connection reliability and high protection level.

The controller has four analog input channels: A-phase current, C-phase current, zero-sequence current, and BC phase-to-phase voltage. The controller determines line faults by monitoring the values of the above analog quantities in real time and comparing them with the set values, thereby performing corresponding processing. The table below shows the fault handling results for different systems.

Pole-mounted Installation Diagram

The ZW32-12F boundary switch body and controller are installed on the same pole. The connection diagram is shown in Figure 2:

• 1. Opening/Closing Operating Handle
• 2. Charging Handle
• 3. Opening/Closing Indicator
• 4. Vacuum Interrupter Enclosure
• 5. Current Transformer
• 6. Operating Mechanism

Figure 1: Circuit Breaker Outline and Installation Dimensions

Local Remote Control Operation Method:

B Button: Unlock; A Button: Open; D Button: Close;

For remote control operation, press B button for 1 second first, then press the function button within 3 seconds;

For example: For opening operation, press B button for 1 second first, then press A button within 3 seconds;

For closing operation, press B button for 1 second first, then press D button within 3 seconds.

Device Search

Select 'Device Search', the PDA will search for controllers within communication range (open area distance less than 150 meters). If controllers are found within the search range, select the device number of the corresponding controller to enter the main interface window displaying the selected device number.

Status Query

Select 'Status Query', the display result will be the real-time status values of the current controller.

Record Query

Select 'Record Query' to display the 30 most recent fault records that have occurred;

Remote Control Operation

Select the 'Remote Control Operation' window to display the selection interface.

Select 'Switch Close' to remotely control the controller with the corresponding device number to perform one closing operation;

Select 'Switch Open' to remotely control the controller with the corresponding device number to perform one opening operation;

Modify Settings

Select 'Modify Settings' to modify all setting parameters of the controller.

Device Reset

'Device Reset' can remotely control the FDR-2GP controller to perform a reset operation.

Transportation, Acceptance and Storage

Transportation

During transportation, the switch body and controller must be placed in a closed packing case and fixed. Acceptance

7.2.1 Check whether the controller packaging is damaged.

7.2.2 Check whether the documents are complete and whether the accessories and spare parts are complete against the product packing list.

7.2.3 Check whether the technical parameters on the nameplate meet the order requirements.

Storage

This controller should be stored indoors in a dry, ventilated, moisture-proof, shock-proof place protected from harmful gas intrusion. For long-term storage, regularly check whether the environment meets the requirements. Packing, unpacking and storage should be carried out in a dry indoor environment, and the product and its components should be checked for completeness and consistency. The stacking height of the product body should not exceed 3 layers.

Operation and Maintenance

The equipment has undergone strict factory tests. If any abnormality is found during use, please record the factory serial number of the equipment and the abnormal issues and contact us.

Special Note: Do not disassemble, modify or repair the equipment without authorization.

Possible faults that may occur during use are listed below. In the event of an accident, if the switch malfunctions, the following handling methods are provided for reference during use.