13.8kV Medium Voltage Switchgear
The switchgear and main apparatus contained in it comply with the latest IEC Standards:
• IEC 62271-1 for general purposes
• IEC 62271-200 for the switchgear
• IEC 62271-102 for the earthing switch
• IEC 62271-100 for the circuit-breakers
• IEC 60071-2 for the insulation coordination
• IEC 62271-106 for the contactors
• IEC 60265-1 for the switch-disconnectors
• IEC 60529 for degree of protections
13.8kV Medium Voltage Switchgear
The switchgear and main apparatus contained in it comply with the latest IEC Standards:
• IEC 62271-1 for general purposes
• IEC 62271-200 for the switchgear
• IEC 62271-102 for the earthing switch
• IEC 62271-100 for the circuit-breakers
• IEC 60071-2 for the insulation coordination
• IEC 62271-106 for the contactors
• IEC 60265-1 for the switch-disconnectors
• IEC 60529 for degree of protections
Service environment:
a) Air temperature:Maximum temperature: +40℃; Minimum temperature:-25℃
| Rated voltage | kV | 13.8 |
| Rated insulation voltage | kV | 17.5 |
| Rated power frequency withstand voltage | kV 1min | 68 |
| Rated lightning impulse withstand voltage | kV | 95 |
| Rated frequency | Hz | 50/60 |
| Rated short time withstand current | kA 3 s | up to 50 |
| Peak current | kA | up to 125 |
| Internal arc withstand current | kA 1s | up to 50 |
| Main busbar rated current | A | up to 4000 |
| Circuit-breaker rated current | A | 630 1250 1600 2000 2500 3150 |
| Circuit-breaker rated current with forced ventilation | A | 3600 4000 |
| Description | Unit | Value | |||||||
| Rated voltage | kV | 13.8 | |||||||
| Rated short-time power frequency withstand voltage (1min)(1min) | 68 | ||||||||
| Rated lightning impulse withstand voltage (peak) | 95 | ||||||||
| Rated freq | Hz | 50,60 | |||||||
| Rated current | A | 630 | 630 | 1250 | 1600 | 1250 | 1600 | 1600 | 2000 |
| 1250 | 1250 | 2000 | 2500 | 2000 | 2500 | 2500 | 3150 | ||
| 3150 | 3150 | 4000* | 4000* | ||||||
| Rated short-circuit drop-out current | kA | 20 | 25 | 31.5 | 40 | 50 | |||
| Rated short time withstand current | 20 | 25 | 31.5 | 40 | 50 | ||||
| Rated short time continual time | s | 4 | |||||||
| Rated peak withstand current | kA | 50 | 63 | 80 | 100 | 125 | |||
| Rated short-circuit closing current | 50 | 63 | 80 | 100 | 125 | ||||
| Rated single/ back-to-back capacitor bank drop-out current | A | 630/400(40kA is 800/400) | |||||||
| Rated capacitor bank closing inrush current | kA | 12.5(frequency no more than 1000Hz) | |||||||
| Opening time (rated volt.) | ms | 20~50 | |||||||
| Closing time (rated volt.) | 35~70 | ||||||||
| Mechanical life | Times | 30,000 | |||||||
| Rated break times for rated short drop out current | 50 | ||||||||
| Rated operation voltage | V | AC110/220 DC110/220 | |||||||
| Rated current of power storing motor | W | 70 | |||||||
| Average opening speed | m/s | 0.9~1.3 | |||||||
| Average closing speed | 0.4~0.8 | ||||||||
| Rated operation procedure | opening-0.3s-closing opening-180s-closing opening | ||||||||
Fully type-tested
The switchgear has undergone all the tests required by the international (IEC) Standards. Each switchgear unit is subjected to routine tests in the factory before delivery. These tests are intended to provide a functional check of the switchgear based on the specific characteristics of each installation.
IEC type tests
• Short-time and peak withstand current
• Temperature rise
• Internal arc capability
• Dielectric test
• Making and breaking capacity of circuit-breaker
• Earthing switch making capacity (top application)
• Mechanical operations of circuit-breaker and line
disconnector
• IP degree and impact test
IEC routine factory tests
• Visual inspection and check
• Mechanical sequence operations
• Cabling check
• Electrical sequence operations
• Power frequency withstand voltage
• Measurement of the resistance of the main circuits
• Secondary insulation test
The enclosure is made of aluminium-zinc plated steel sheet by CNC machine, high precise dimension, short production cycle, excellent mechanical strength and nice appearance. The busbar compartment, VCB handc art compartment, cable compartment and relay compartment are separated by metal sheet. Flexible operation for handcart movement, clear position instruction, the earthing switch allow to making short circuit current and creditable mechanical interlock.
