Aierway VBI-40.5 Floor Mounted Vacuum Circuit Breaker

Product Introduction & User Manual

1. Product Overview

The VBI-40.5 Floor Mounted Vacuum Circuit Breaker is a high-performance, medium-voltage switching device designed for reliable protection and control of electrical systems rated at 40.5kV. Utilizing advanced vacuum interrupter technology, it ensures efficient arc quenching, minimal maintenance, and a long operational lifespan. Ideal for power distribution networks, industrial plants, and substations, this breaker combines robust construction with user-friendly operation.

2. Key Features

• Voltage Rating: 40.5kV (withstand 95kV lightning impulse).

• Current Rating: Up to 2500A continuous, 31.5kA short-circuit breaking capacity.

• Vacuum Interrupter: Hermetically sealed, maintenance-free, and environmentally friendly (no SF₆ gas).

• Mechanism: Spring-operated or motor-driven储能 mechanism for quick closing/opening (<50ms).

• Safety: Integrated anti-slip design, mechanical/electrical interlocks, and grounding switches.

• Standards Compliance: Meets IEC 62271, GB/T 1984, and ANSI C37.04.

3. Installation Instructions

3.1 Pre-Installation Checks

• Verify intact packaging and no physical damage.

• Confirm rated parameters match system requirements.

• Ensure a level, vibration-free concrete foundation.

3.2 Mounting Steps

1. Secure the breaker to the floor using anchor bolts (M16 recommended).

2. Connect primary busbars with torque settings per manufacturer specs (e.g., 50Nm).

3. Wire secondary control cables to terminals (labeled “Open/Close Coil,” “Auxiliary Contacts”).

4. Ground the breaker chassis securely (接地电阻 ≤4Ω).

4. Operation Guide

4.1 Manual Operation

• Closing: Rotate the manual handle clockwise until a “click” confirms engagement.

• Opening: Press the red “Trip” button or pull the mechanical trip lever.

4.2 Electrical Operation

• Apply 220VDC/110VAC to the closing coil (momentary pulse) for remote control.

• Use the local/remote selector switch for mode切换.

4.3 Indicators & Alarms

• Green LED: Breaker closed.

• Red LED: Breaker open/tripped.

• Alarm Contacts: Trigger for SF₆ pressure loss (if equipped) or spring未储能.

5. Maintenance & Troubleshooting

5.1 Routine Checks

• Inspect contacts every 5,000 operations (via viewport).

• Lubricate moving parts annually with high-temperature grease.

• Test insulation resistance (>1000MΩ @5kV).

5.2 Common Issues

• Failure to Close: Check control power, spring charge, or interlock conditions.

• Excessive Heating: Tighten connections; measure contact resistance (<50μΩ).

6. Safety Warnings

• De-energize the breaker before servicing.

• Only trained personnel should perform maintenance.

• Never operate with visible damage or abnormal noises.

7. Environmental & Disposal

• Dispose of vacuum interrupters as electronic waste (non-hazardous).

• Recycle metals and plastics per local regulations.

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Note: For detailed wiring diagrams or technical support, refer to the appendix or contact the manufacturer.
Warranty: 10 years or 10,000 operations (whichever comes first).

This concise manual ensures safe and efficient use of the VBI-40.5 breaker while adhering to global electrical standards. Always prioritize safety protocols during installation and operation.

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No.	Item	Unit	Data
1	Rated voltage	KV	40.5
2	1 min rated short-duration power frequency withstand voltage	KV	95
3	Lighting impulse withstand voltage	KV	185
4	Rated frequency	Hz	50/60
5	Rated current	A	630/1250/1600/2000/2500
6	Rated short-circuit breaking current	KA	20 | 25 | 31.5
7	Rated short-circuit making current(peak value)	KA	50 | 63 | 80
8	Rated short-time withstand current	KA	20 | 25 | 31.5
9	Rated peak withstand current	KA	50 | 63 | 80
10	Rated short-time withstand current duration	S	4
11	Rated operating sequence		0-0.3s-CO-180s-CO
12	Rated short-circuit current breaking times	Times	30
13	Mechanical Life	Times	10000
14	Contact opening distance	mm	20±2
15	Contact overtravel	mm	6±1
16	Average closing speed	m/s	0.6±0.2
17	Average breaking speed	m/s	1.2±0.2
18	Contact closing bounce time	ms	≤3
19	Contact Closing and Breaking Non-simultaneous	ms	≤2
20	Circuit resistance per phase	μΩ	≤80
21	Permissible accumulated wear thickness of dynamic and static contact	mm	3