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High Voltage Disconnect Switch
GN30-12 Indoor Rotary High Voltage Disconnector
GN30-12 Indoor Rotary High-Voltage Disconnector for switching and isolation applications. Confirm switch type and required duty and request model-specific information from GRL.
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Overview
The GN30-12 type rotary indoor high-voltage disconnect switch is a new type of rotary contact knife disconnect switch. Its main structure consists of two sets of insulators and contacts fixed on the upper and lower planes of a three-phase common base frame. The opening and closing of the switch is achieved by rotating the contact knife.
The GN30-12D type switch is based on the GN30-12 type switch with the addition of a grounding switch, which can meet the needs of different power systems. This product features a compact design, small footprint, strong insulation, and easy installation and adjustment. Its performance meets the requirements of GB1985-89 “AC High Voltage Disconnecting Switches and Grounding Switches,” and is suitable for indoor systems with a rated voltage of 10 kV AC 50Hz and below, used for switching circuits when there is voltage but no load. It can be used in conjunction with high-voltage switchgear or independently.
Model Meaning
Environmental conditions for use
◆Altitude: Not exceeding 1000m;
◆Air temperature: Upper limit +40℃; Lower limit -10℃
◆Relative humidity: Daily average not exceeding 95%; Monthly average not exceeding 90%;
◆Earthquake intensity: Not exceeding 8 degrees;
◆Contamination level: Location free from severe dust, corrosive chemicals, and explosive substances;
◆Installation location: A location free from frequent and severe vibrations.
Main technical parameters
| Product Model Specifications/Items/Parameters | GN30-12/400-12.5 | GN30-12/630-20 | GN30-12/1000-31.5 | GN30-12/1250-31.5 | |
| GN30-12D/400-12.5 | GN30-12D/630-20 | GN30-12D/1000-31.5 | GN30-12D/1250-31.5 | ||
| Rated voltage (kV) | 2 | ||||
| Rated current (A) | 400 | 630 | 1000 | 1250 | |
| Thermally stable current (KA) | 12.5 | 20 | 31.5 | ||
| Thermal stability time (s) | 4 | ||||
| Dynamic stability current (KA) | 31.5 | 50 | 80 | ||
| Rated insulation level | Lightning impulse voltage (kV) | Interspersed, inter-regional 75, fracture 85 | |||
| Rated insulation level | 1-minute power frequency withstand voltage (kV) | Interspersed, intersecting, 42, break point 48 | |||
External dimensions and installation dimensions (mm)
| GN30-12 | GN30-12D | |||||||||||||
| 400/630A | 1000A | 1250A | 400/630A | 1000A | 1250A | |||||||||
| A | C | A | C | A | C | A | B | C | A | B | C | A | B | C |
| 560 | 315 | 580 | 332 | 580 | 295 | 550 | 610 | 240 | 575 | 615 | 245 | 580 | 600 | 295 |
Selecting GN30-12 Indoor Rotary High-Voltage Disconnector
Before requesting a quotation, confirm switch type and required duty, rated voltage, current and interlocks and installation dimensions and operating mechanism. Send the exact model, quantity and installation details so the configuration and document set can be checked against your project.
Compare the high voltage disconnect switch range, including GN19-12 Indoor High Voltage Disconnector; JN15-12/31.5 Indoor high voltage grounding switch. For drawings and order-specific questions, send your product requirements to GRL.
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