GN27-30kv(40.5kv) Indoor High-Voltage Disconnector
This series of indoor high-voltage isolating switches is designed for three-phase power systems with a rated voltage of 35kV and an AC frequency of 50Hz. It is used to connect and switch lines under voltage without load.
Visible Isolation Gap for Maximum Safety: Provides a distinct, reliable physical break in the open position, ensuring absolute safety for technicians performing downstream maintenance.
Robust Mechanical Interlocking System: Features reliable mechanical interlock provisions to prevent misoperation (such as opening or closing under load), safeguarding both operators and primary assets.
Low-Resistance Current-Carrying Design: Main contacts and conductive paths are manufactured from high-purity electrolytic copper with silver-plating options, minimizing temperature rise and power loss during continuous full-load operations.
High-Grade Insulation Performance: Utilizes superior epoxy resin insulators and porcelain components offering high creepage distances, preventing flashovers in confined indoor environments.
|
Model |
Rated voltage (KV)
|
Maximum Voltage (KV)
|
Rated current(A)
|
4S Thermal current (Effective value) (kA)
|
Dynamic current (Peak) (kA)
|
|
GN27-35(C)(D)/630 |
35 |
40.5 |
630 |
20 |
50 |
|
GN27-35(C)(D)/1250 |
1250 |
31.5 |
80 |
||
|
GN27-35(C)(D)/2000 |
2000 |
40 |
100 |
Environmental Conditions：
1. Altitude: Up to 1000m.
2. Ambient air temperature: Not exceeding +40°C and not below -25°C.
3. Relative humidity: Daily average not greater than 95%, monthly average not greater than 90%.
4. Vapor pressure: Daily average not greater than 2.2 × 10³ MPa, monthly average not greater than 1.8 × 10³ MPa.
5. The location should be free from fire hazards, explosions, corrosive metals, harmful gases that damage insulation, and conductive dust.
Frequently Asked Questions (FAQ)：
Q1: What is the main function of an indoor disconnecting switch?
A: An indoor disconnecting switch (isolator) is primarily used to create a visible insulation gap in medium-voltage circuits when equipment is de-energized, ensuring safe maintenance. It is designed to switch small capacitive or inductive currents, but not heavy load or short-circuit currents.
Q2: What voltage tiers are available in Chennuo’s indoor isolator series?
A: Our indoor disconnecting switch series covers standard voltage classes from 10kV/12kV, 24kV, up to 40.5kV, with rated currents ranging from 630A to 2000A to suit various distribution layouts.
Q3: Does the switch include grounding capabilities?
A: Yes. We offer flexible configurations including switches without grounding blades, with single-side grounding blades, or with double-side grounding blades (earthing switches) to fulfill specific safety interlocking requirements.
Q4: Can these indoor isolators be operated with a motor, or are they strictly manual?
A: They support standard manual operation via an operating handle (CS mechanism). Additionally, motorized operation options can be configured upon request for automated substation applications.
Q5: What certifications and standards do your disconnecting switches comply with?
A: Our products are manufactured in strict compliance with relevant IEC standards and national GB standards (such as GB/T 1985 for high-voltage alternating disconnectors and earthing switches), ensuring seamless international project deployment.
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Chennuo Electric Technology Group Co., Ltd
Tel：+86 19303791130
Email：sales@chennuojt.com
Add：No. 9 Duyu Street, Luolong District, Luoyang City, Henan Province, China
