A 15kV distribution system cannot be selected by rated voltage alone. The 15kV Outdoor High Voltage Isolator Switch combines the 17.5kV working-voltage class with defined withstand-voltage levels and two rated-current options, giving engineers a clear configuration basis for outdoor feeder, distribution, and equipment replacement projects. The final selection should be checked against the system load, short-circuit level, insulation requirements, and mounting conditions.
The 15kV Outdoor High Voltage Isolator Switch is configured for systems with a 15kV rated voltage and 17.5kV working voltage. Its electrical parameters are specified around this voltage class, allowing insulation and withstand-voltage requirements to be checked directly against the project design.
The product provides 55kV power-frequency withstand voltage for earth and 65kV for the interruptor gap. These values can be reviewed together with the system insulation coordination requirements during technical selection.
The specified lightning impulse withstand voltage is 105kV for earth and 120kV for the interruptor gap. This parameter should be considered together with the project's insulation level and applicable electrical standards.
Two rated-current configurations are available: 400A and 630A. The appropriate version can be selected according to the continuous operating requirements of the distribution circuit and the rated electrical parameters of the complete system.
The equipment is designed for outdoor distribution applications, where mounting arrangement, pollution conditions, creepage requirements, and environmental exposure need to be considered together with the electrical specifications.
The specified mechanical life is 2,000 operations. For outdoor distribution equipment that is generally operated for isolation and maintenance rather than frequent switching, this parameter provides a reference for equipment selection and maintenance planning.
The 15kV Outdoor High Voltage Isolator Switch is identified with a 15kV rated voltage and a 17.5kV rated working voltage. During project selection, both values should be checked with the system specifications rather than treating the 15kV designation as the only electrical parameter.
For outdoor switchgear, the voltage designation should be reviewed together with rated current, power-frequency withstand voltage, lightning impulse withstand voltage, short-time withstand current, and installation conditions. These parameters determine whether the selected disconnector matches the electrical design of the installation.
| Parameter | Specification |
| Product Type | Outdoor High Voltage Disconnector Switch |
| Rated Voltage | 15kV |
| Rated Working Voltage | 17.5kV |
| Rated Frequency | 50Hz |
| Rated Current | 400A / 630A |
| Power-Frequency Withstand Voltage (Earth/Gap) | 55kV / 65kV |
| Lightning Impulse Withstand Voltage (Earth/Gap) | 105kV / 120kV |
| 4s Short-Time Withstand Current | Confirm per configuration (series covers 6.3-31.5kA) |
| Rated Peak Withstand Current | Confirm per configuration (series covers 16-80kA) |
| Creepage Distance | 30mm/380mm (confirm per configuration) |
| Mechanical Life | 2,000 operations |
For a 17.5kV working-voltage application, insulation coordination is an important part of product selection. The specified power-frequency withstand voltage is 55kV for earth and 65kV for the interruptor gap. The corresponding lightning impulse withstand voltage is 105kV and 120kV. These values should be considered together with the switchgear arrangement, surrounding insulation, pollution conditions, and applicable project standards. The final configuration should be confirmed from the actual technical requirements.
The 400A and 630A configurations should be selected according to the continuous operating requirements of the circuit. Rated current should be checked against the electrical design rather than selected only according to cabinet size.
The exact short-time withstand current is configuration-dependent and should be confirmed according to the project short-circuit calculation. The supplied series information covers 6.3kA to 31.5kA short-time withstand current and 16kA to 80kA rated peak withstand current across its configurations.
Outdoor installation introduces additional factors that need to be considered during product selection. The mounting method, available space, environmental pollution, creepage requirement, conductor arrangement, and operating mechanism position may affect the applicable configuration.
The 15kV Outdoor High Voltage Isolator Switch may be used with an outdoor bracket, pole-mounted arrangement, or another project-specific installation method. Mounting dimensions should be checked against the actual support structure and connection layout.
The supplied information includes 30mm/380mm creepage distance values that require configuration confirmation. The applicable creepage requirement should be determined according to the installation environment and relevant insulation requirements.
Outdoor projects should provide information about dust, humidity, salt exposure, temperature changes, and other site conditions when necessary. These factors can affect the required insulation and maintenance arrangement.
For a 15kV / 17.5kV outdoor distribution project, product selection involves more than choosing between 400A and 630A. The disconnect needs to correspond with the electrical system, insulation coordination, short-circuit conditions, installation structure, and maintenance requirements. These factors can be reviewed together before the final configuration is confirmed.
The system voltage, rated current, power-frequency withstand voltage, lightning impulse withstand voltage, and short-time withstand current provide the basic electrical conditions for selection. The 400A or 630A configuration should be determined according to the actual circuit requirements rather than selected only by equipment availability.
Outdoor installation requires attention to insulation distance and the surrounding environment. Creepage distance, pollution conditions, installation elevation, and exposure conditions may affect the applicable configuration. These factors should be confirmed together with the required insulation levels.
The available mounting space, installation method, connection arrangement, and existing structure also need to match the selected disconnect. For replacement projects, dimensional information is particularly important because an electrically suitable product may still require a different mounting arrangement.
The following technical information can be used as a basis for configuration review:
Providing these details in advance helps align the electrical and mechanical requirements before production.
Replacement work usually starts with the existing equipment rather than with a new standard configuration. The original nameplate, model, rated current, system voltage, mounting dimensions, connection arrangement, and available installation space can be used to establish the replacement requirements.
If original drawings are available, they can be submitted for technical review. When drawings are not available, clear equipment photographs together with measured dimensions can also provide a useful basis for configuration confirmation.
Dongfa Intelligent can coordinate the electrical and mechanical information required for the 15kV Outdoor High Voltage Isolator Switch before production. Technical review can cover the voltage class, current rating, insulation requirements, short-time withstand level, mounting arrangement, and available dimensions.
For standard configurations, the required parameters can be confirmed directly against the available product specifications. For replacement or project-specific requirements, drawings, nameplate information, photographs, and measured dimensions can be reviewed together before production.
Standard project information can be used to confirm the applicable current rating and insulation parameters. This helps establish the product configuration before order details are finalized.
Existing equipment information can be reviewed when the project involves replacement. This allows electrical requirements and installation compatibility to be considered together instead of treating the replacement as a simple model-to-model substitution.
Zhejiang Dongfa Intelligent Electrical Technology Co., Ltd. was founded in 2012 and operates in Yueqing Economic Development Zone, Wenzhou, Zhejiang. The company focuses on high-voltage electrical equipment and supplies products covering 12kV, 24kV, and 40.5kV applications.
The company operates with 17 employees, including 4 technical and R&D personnel, supported by 2 production lines and 1 set of testing equipment. Production capacity is approximately 600-700 units per month and 7,000-8,000 units annually.
Its management systems include ISO 9001, ISO 14001, and ISO 45001. Applicable products are developed and supplied according to relevant GB standards and IEC 62271 requirements, with relevant type test reports available for core product categories.
The 15kV Outdoor High Voltage Isolator Switch identifies the nominal voltage class, while 17.5kV is the rated working voltage specified for the product configuration. Both values should be considered when matching the disconnector with the electrical system.
The rated current is one of the main selection parameters, but it is not the only factor. The installation arrangement, insulation requirements, short-time withstand current, and mechanical dimensions also need to match the project.
These values represent the power-frequency withstand voltage for the specified insulation conditions. The applicable value should be checked according to the corresponding test condition and product configuration rather than treated as two alternative operating voltages.
These parameters are relevant when checking the insulation coordination of the outdoor distribution system against lightning impulse conditions. The required level should be matched with the system design and applicable technical requirements.
Not necessarily. Electrical ratings may be compatible while the mounting dimensions or connection arrangement differ. For replacement projects, the original model, nameplate, dimensions, connection position, and installation photographs should be checked before confirming the replacement configuration.
The original nameplate, clear equipment photographs, measured mounting dimensions, system voltage, rated current, and short-time withstand requirements can be provided for technical review. These details can help determine whether a standard configuration is suitable.
No. Mechanical life refers to the specified number of mechanical operating cycles. Short-time withstand current describes the product's ability to withstand the specified short-circuit current for the stated duration. They are separate technical parameters.
Yes. Project drawings, technical specifications, nameplate information, or installation dimensions can be submitted for configuration review before production. This is particularly useful for replacement, retrofit, and non-standard outdoor installation projects.
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