12kv Sf6 Meidum Voltage Cubicle Gas Insulated Switchgear for Power Supply

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12kv Sf6 Meidum Voltage Cubicle Gas Insulated Switchgear for Power Supply

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Product Description

Technical Specifications

Serial No.	Item		Unit	Data
1	Rated voltage		kV	12	40.5
2	Rated frequency		Hz	50/60
3	Rated current		A	1250/2500/3150	1250/2500
4	Rated power frequency withstand voltage (1min)	Phases and to earth	kV	42	95
	Rated power frequency withstand voltage (1min)	Isolating distances		48	118
	Rated lightning impulse withstand voltage	Phases and to earth		75(95*)	185
	Rated lightning impulse withstand voltage	Isolating distances		85(110*)	215
	Power frequency withstand voltage (Control & auxiliary circuit)			2
5	Rated short-time withstand current		kA	31.5/40	31.5
6	Rated peak withstand current		kA	80/100	80
7	Duration of rated short-circuit current		s	4	4
8	Rated short-circuit breaking current		kA	31.5/40	31.5
9	Rated short-circuit making current		kA	80/100	80
10	Arcing duration		s	1	1
11	Rated operating sequence		-	0-0.3s-CO-3min-CO
12	Insulating gas		-	SF6
13	Annual leakage rate		%	≤ 0.01
14	Standard degree of protection	Sealed gas box	-	IP67
14	Standard degree of protection	Switchgear enclosure	-	IP4X
15	Rated inflation pressure		MPa	0.03
15	Minimum functional level pressure		MPa	0.01
16	Rated supply voltage of auxiliary circuit		V	DC 24, 48, 110, 220, AC220
17	Mechanical life	Circuit breaker	Ops	12000	12000
		Isolation switch		3000	3000
		Earthing switch		3000	3000
18	Electrical endurance of circuit breaker		Ops	30(E2)
19	Loss of service continuity		-	LSC2A

Standards & Specifications

IEC 62271-1: 2021 High-voltage switchgear and controlgear - Part 1: Common specifications for alternating current switchgear and controlgear.

IEC 62271-100: 2021 High-voltage switchgear and controlgear - Part 100: Alternating-current circuit breakers.

IEC 62271-102: 2022 EXV High-voltage switchgear and controlgear - Part 102: Alternating current disconnectors and earthing switches.

IEC 62271-103: 2021 High-voltage switchgear and controlgear - Part 103: Alternating current switches for rated voltages above 1 kV up to and including 52 kV.

IEC 62271-200: 2021 AC metal-enclosed switchgear and controlgear for rated voltages above 1kV and up to and including 52kV.

IEC 61869-2:2012 Instrument transformers - Part 2: Additional requirements for current transformers.

IEC 61869-3:2011 Instrument transformers - Part 3: Additional requirements for inductive voltage transformers.

IEC 60529: 1989+AMD1:1999+AMD2:2013 Consolidated version Degrees of protection provided by enclosures (IP Code).

Product Presentation

Frequently Asked Questions (FAQ)

What are the primary applications and voltage ratings for this gas-insulated switchgear?

This medium voltage cubicle gas-insulated switchgear is designed for power supply networks, supporting rated voltages of 12kV and 40.5kV. It operates effectively under frequencies of 50/60 Hz to ensure stable power distribution.

What insulation gas is used, and what is its leakage performance?

The system utilizes SF6 (Sulfur Hexafluoride) as the primary insulating gas. It features an exceptional sealed construction with an extremely low annual leakage rate of ≤ 0.01%, ensuring excellent environmental safety and consistent performance.

What are the IP ratings of the switchgear's structural components?

The design ensures robust ingress protection, featuring an IP67 rating for the completely sealed gas box and an IP4X rating for the external switchgear enclosure, protecting components from dust and water interference.

Which international standards does this equipment comply with?

The equipment fully complies with leading international standards, including IEC 62271-1, IEC 62271-100, IEC 62271-102, IEC 62271-103, and IEC 62271-200, validating its electrical engineering reliability and structural integrity.

What is the mechanical life expectancy of the integrated components?

This switchgear delivers long-term operational durability. The main circuit breaker supports a mechanical life of 12,000 operations, while both the isolation switch and earthing switch support 3,000 operation cycles.