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GTD9-12D Indoor High Voltage AC Isolating Switch - Reliable China Suppliers & Factory for Electrical Solutions
Detail introduction
This product is suitable for three-phase AC 50/60HZ, 12KV no-load current situations. When isolation, maintenance or repair of the circuit is required, the circuit can be disconnected or closed to achieve safe isolation and ensure the safety of operators and equipment. The layout, appearance, and dimensions of this isolating switch are completely consistent with VTD9-12D and FTD9-12D vacuum switches. It is a typical through wall isolating switch that is easy to expand and combine in switchgear.
IEC62271-1
High voltage switchgear and control equipment - Part 1: Common technical requirements for AC switchgear and control equipment
IEC62271-102
High voltage switchgear and control equipment - Part 102: AC isolating switches and grounding switches
GB/T1985
High voltage AC isolating switch and grounding switch
GB/T11022
Common Technical Requirements for High Voltage Switchgear and Control Equipment Standards
DL/T486
High voltage AC isolating switch and grounding switch
Service Conditions
a. Environmental temperature:
- 25℃ ~ +40℃
- 25℃ ~ +40℃
b. Altitude:
≤ 1000m
≤ 1000m
c. Relative humidity:
Daily average relative humidity ≤ 95%
Monthly average relative humidity ≤ 90%
Daily average vapor pressure ≤ 2.2x10-3 MPa
Monthly average vapor pressure ≤1.8x10-3MPa
Daily average relative humidity ≤ 95%
Monthly average relative humidity ≤ 90%
Daily average vapor pressure ≤ 2.2x10-3 MPa
Monthly average vapor pressure ≤1.8x10-3MPa
d. Seismic grade:
seismic intensity ≤ 8
seismic intensity ≤ 8
e. Applicable location:
Free from dripping water, flammable and explosive hazards, chemical corrosive gases, and severe vibrations.
Free from dripping water, flammable and explosive hazards, chemical corrosive gases, and severe vibrations.
※Note: When the usage environment deviates from normal usage conditions, please consult with our company to determine.
Technical Data
| Item | Unit | Parameter | |
|---|---|---|---|
| Rated frequency | Hz | 50/60 | |
| Rated voltage | kV | 12 | |
| Rated power frequency withstand voltage (1 minute, r.m.s) | Phase to phase and phase to ground | KV | 42 |
| Isolation fracture | 48 | ||
| Control and auxiliary circuits | 2 | ||
| Rated lightning impulse withstand voltage (peak) | Phase to phase and phase to ground | kV | 75 |
| Isolation fracture | 85 | ||
| Rated current | A | 630, 1250 | |
| Rated short-circuit breaking current (r.m.s) | kA | / | |
| Rated short-time withstand current and time | kA/s | 20/4, 25/4, 31.5/4 | |
| Rated peak withstand current | kA | 50, 63, 80 | |
| Rated short-circuit making current (peak) | kA | / | |
| Rated breaking current of single/back-to-back capacitor group | A | / | |
| Rated capacitor bank making current | kA | / | |
| Rated handover (transfer) current | A | / | |
| Mechanical life | Times | 3000 | |
| Main circuit resistance of each phase | mΩ | ≤ 45, ≤ 40 | |
| Clearance between open contacts | mm | 125 ± 1 | |
| Contacting travel | mm | / | |
| Contact closing bounce time | mm | / | |
| Three-phase asynchronous closing and opening | ms | / | |
| Average opening speed (contact just opened - 6mm) | m/s | / | |
| Average closing speed ( 6mm - contact just opened) | m/s | / | |
| Rated contact pressure | N | / | |
| Opening time (at rated voltage) | ms | / | |
| Closing time (at rated voltage) | ms | / | |
| Rated operating sequence | / | ||
Typical outline dimensions (fit) and structural diagram
| Rated current (A) | 630 | 1250 |
| Rated short-time withstand current (kA, 4s) | 25 | |
| Inter-phase distance (mm) | 210 | |
GTD9-12 (inter-phase distance P=210) outline dimension drawing of isolating switch
(This diagram shows the product in the upright position, and the product can also be installed in an inverted position.)
| Rated current (A) | 630 | 1250 |
| Rated short-time withstand current (kA, 4s) | 25 | |
| Inter phase distance (mm) | 210 | |
GTD9-12D (inter-phase distance P=210) outline dimension drawing of isolating switch
(This diagram shows the product in the upright position, and the product can also be installed in an inverted position.)
Frequently Asked Questions (FAQ)
What applications is this isolating switch suitable for?
This isolating switch is designed for three-phase AC 50/60HZ, 12KV no-load current scenarios. It allows safe disconnection or closure of circuits during isolation, maintenance, or repair to protect operators and equipment.
Which international and national standards does this product comply with?
The product complies with several standards, including IEC62271-1, IEC62271-102, GB/T1985, GB/T11022, and DL/T486, ensuring international quality and performance safety.
What are the environmental limits for operating this isolating switch?
Standard operating conditions include temperatures between -25℃ and +40℃, altitudes ≤ 1000m, daily average relative humidity ≤ 95%, and seismic intensity ≤ 8. The installation location should be free from chemical corrosive gases, dripping water, and severe vibrations.
What are the rated current and voltage parameters of the switch?
The switch operates at a rated voltage of 12KV, with rated current options available at 630A and 1250A.
Can this isolating switch be installed in different positions?
Yes, this through-wall isolating switch is highly flexible. Although drawings show it in an upright position, it is designed to be installed in both upright and inverted positions based on switchgear requirements.
What is the mechanical lifespan of this isolating switch?
This isolating switch has a rated mechanical life of up to 3000 operation cycles under standard conditions.