ZHN3A-72.5 Environmentally Friendly GIS (Dedicated for New Energy) - Product

The ZHN3A-72.5 Environmentally Friendly GIS (Dedicated for New Energy) is designed to support the green transformation of energy systems, in alignment with global carbon peak and neutrality goals. As part of efforts to develop a more sustainable and low-carbon energy structure, renewable energy sources like solar and wind power play a key role. The push for cleaner energy sources requires advancements in technology to handle new power infrastructure demands.

Key Context:

Carbon Peak and Neutrality Goals: With China and other nations striving toward achieving carbon reduction targets, renewable energy, particularly offshore wind power, is becoming a significant part of the energy transition.
Offshore Wind Energy in China: By the end of 2022, China had installed 30.51 GW of offshore wind power, only 1% of its long-term target of 3,009 GW. The increasing capacity of offshore wind turbines, from 5 MW to 18 MW, is pushing the development of higher voltage levels, moving from 35 kV to 66 kV and 72.5 kV systems.

ZHN3A-72.5 GIS Key Features:

Voltage Level: 72.5kV, gradually replacing the older 40.5kV systems, making it more suitable for renewable energy setups like solar and wind power.
Environmentally Friendly: This gas-insulated switchgear (GIS) uses a fluorine-free insulating gas, replacing the traditional SF6 gas, making it a green technology solution.
Development Background: Shenyang Huade Haitai Electric Co., Ltd., a pioneer in developing fluorine-free switchgear, began work on this technology in 2009, with collaborations from leading experts in Germany and Japan.
Technical Excellence: The ZHN3A-72.5 GIS offers high reliability and is maintenance-free, with impressive performance specifications:
- Rated current of 1250A, expandable up to 2500A
- Rated short-circuit breaking current of 31.5kA, with a maximum of 40kA
Compact Design: The switchgear is compact, measuring 2500mm in length and 980mm in width, making it ideal for installations with limited space.

S/N	Item		Unit	Parameters
1	Rated voltage		kV	72.5
2	Rated frequency		Hz	50/60
3	Rated continuous current		A	1250
4	Rated short-circuit breaking current		kA	31.5
5	Rated short circuit making current		kA	80/86
6	Full breaking time		ms	≤ 60
7	Circuit breaker closing time		ms	≤100
8	Circuit breaker opening time		ms	≤40
9	Asynchronous circuit breaker	Opening	ms	≤2
9	Asynchronous circuit breaker	Closing	ms	≤2
10	Rated short-time withstand current (effective value)		kA	31.5
11	Rated short-circuit duration		s	3
12	Rated peak withstand current (effective value)		kA	80/86
13	Rated short-time power frequency withstand voltage (1min)	Phase to earth， Phase to Phase	kV	160
13	Rated short-time power frequency withstand voltage (1min)	Across the isolating distance	kV	160+42
14	Rated lighting impulse withstand voltage (Peak value)	Phase to earth， Phase to Phase	kV	380
14	Rated lighting impulse withstand voltage (Peak value)	Across the isolating distance	kV	380+60
15	Clean air Gas pressure (20℃, gauge pressure)	Rated pressure	Mpa	0.6
15	Clean air Gas pressure (20℃, gauge pressure)	Alarm pressure	Mpa	0.57
16	Minimum functional pressure		Mpa	0.56
17	Circuit breaker electrical life			E2 level
18	Rated operating sequence			O-0.3s-CO-180s-CO
19	Partial discharge (Under 1.2 times rated voltage)	Integral compartment	pC	5
19	Partial discharge (Under 1.2 times rated voltage)	Insulating part	pC	3
20	Compartment weight		T	1-2
21	Annual leakage rate			≤0.1%