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In electrical engineering, a disconnector, disconnect switch or isolator switch is used to ensure that an electrical circuit is completely de-energized for service or maintenance. They are only used for breaking the circuit and are often found in electrical distribution and substation, where machinery must have its source of driving power removed for adjustment or repair. Disconnectors can be manual or motor operated and may be paired with an earthing switch to ground the portion that has been isolated from the system for ensuring the safety of equipment and the personnel working on it.High-voltage isolation switches are used in electrical substations to allow isolation of apparatus such as circuit breakers, transformers, and transmission lines, for maintenance. The disconnector is usually not intended for normal control of the circuit, but only for safety isolation. Unlike load switches and circuit breakers, disconnectors lack a mechanism for suppression of electric arcs, which occurs when conductors carrying high currents are electrically interrupted. Thus, they are off-load devices, with very low breaking capacity, intended to be opened only after the current has been interrupted by some other control device.
GW1-36
HAIVOL
The 12kV 630A High Voltage Isolator Switch (model GW1 12/630 20) is a professional outdoor AC disconnect switch engineered for 50/60Hz, 12kV power systems, dedicated to creating safe, visible isolation for circuit breakers, transformers, and transmission lines during maintenance. As an off load isolating device, it operates only after current interruption by upstream control equipment, eliminating arc risks and ensuring full circuit de energization for personnel and equipment protection. Featuring three pole linkage and excellent synchronization, it supports vertical/horizontal installation and adapts to heavy pollution environments with its anti pollution design, making it a core safety component for industrial power distribution and outdoor substations.
No. | Item | Unit | Data |
1 | Rated voltage | kV | 12, 36 |
2 | Rated current | A | 630 |
3 | Rated power frequency | Hz | 50/60 |
4 | Rated peak withstand current | kA | 50, 63 |
5 | Rated short-time withstand current | kA | 20, 25 |
6 | Rated short-time withstand current duration | s | 4 |
7 | Main loop resistance | μΩ | 12kV≤90 36kV≤100 |
8 | 1min. PF withstand voltage (dry) | rowspan="3" | 12kV: 42/4836 kV: 95/115 |
9 | 1min. PF withstand voltage (wet) | kV | 12kV: 30 36kV: 85 |
10 | Lightning impulse withstand voltage | kV | 12kV: 75/85 36kV: 185/215 |
11 | Mechanical life | Times | 200 |
Stable Three pole Linkage: Synchronized operation ensures consistent three phase action, avoiding phase imbalance and improving operational reliability.
High strength Insulation: Equipped with ZS 12 series post insulators, minimum bending load reaches 4000N, delivering outstanding insulation and mechanical stability.
Premium Conductive Parts: Static contacts and blades use high purity purple copper plates, with pressure springs optimizing contact pressure and lowering resistance.
Strong Environmental Adaptability: Resists wind up to 35m/s, ice thickness ≤10mm, and pollution level IV, suitable for harsh outdoor sites.
Flexible Installation: Supports vertical/horizontal mounting with CS□ mechanisms, matching diverse substation layouts.
Ideal for outdoor high voltage substations, industrial power distribution stations, urban grid reconstruction, mining power systems, and heavy pollution areas. It provides safe isolation for circuit breakers, power transformers, overhead lines, and capacitor banks, supporting routine maintenance and emergency overhauls.
We support tailored solutions for enterprise clients, including custom insulation grades, extended creepage distances, added earthing blades, and lightning arresters. Bulk orders enjoy stable lead times, full inspection reports, and customized packaging. We also provide dedicated technical guidance for installation and commissioning.
HAIVOL has long focused on outdoor high voltage apparatus R&D and manufacturing, with products complying with international standards. Our 12kV 630A High Voltage Isolator Switch uses precision machining and strict quality control, delivering stable performance and long service life. We offer responsive technical support and perfect after sales solutions, becoming a reliable partner for global power engineering clients.
No. It is an off load device and must be operated only after the circuit current is cut off by other protective equipment to ensure safety.
It matches CS□ series manual mechanisms, supporting both vertical and horizontal installation methods.
Yes, it can operate normally at altitudes ≤3000m, meeting plateau region application requirements.
