GN19-12 type isolating switch is an indoor high-voltage switchgear widely used in power systems with AC 50Hz and rated voltage of 12kV. It is mainly used for opening and closing circuits under no-load conditions to achieve reliable isolation between electrical equipment and power supply. It is divided into ordinary type (GN19-12) and through wall type (GN19-12C), and supports three-phase parallel installation or through wall layout in special scenarios
Through the above design, the GN19-12 isolating switch plays a key role in ensuring the safe operation of the power system. The specific selection needs to be based on the current level, environmental conditions, and functional expansion requirements.
| T y p e | Rated voltage(kV) | Rated current | Rated short circuit current(4s) | Rated peak current |
| GN19-12(C)/400-12.5 | 12KV | 400A | 12.5KA | 31.5KA |
| GN19-12(C)/630-20 | 12KV | 630A | 20KA | 50KA |
| GN19-12(C)/1000-31.5 | 12KV | 1000A | 31.5KA | 80KA |
| GN19-12(C)/1250-31.5 | 12KV | 1250A | 31.5KA | 80KA |
| GN19-12(C)/1600-40 | 12KV | 1600A | 40KA | 80KA |
| GN19-12(C)/2000-40 | 12KV | 2000A | 40KA | 80KA |
Establish visible breakpoints to ensure equipment and power isolation during maintenance.
Split and close low current circuits (such as bus charging current, voltage transformer excitation current).
Indoor environments such as substations and distribution rooms.
Places without fire, explosion, chemical corrosion, and severe vibration
Precautions
Operation with load is strictly prohibited: opening and closing must be performed after the circuit breaker is disconnected.
Maintenance requirements: Regularly check the contact pressure of the contacts, the cleanliness of the insulators, and the lubrication of mechanical components.
