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Gas-insulated switchgear MGIS49-12

Description

MGIS49-12 is a ring main unit for the secondary distribution network. MGIS49-12 can be supplied in 10 different configurations suitable for most switching applications in 12/24 kV distribution networks.

It is extendable and combined with the SafePlus concept, which is ABB’s flexible, modular compact switchgear, they represent a complete solution for 12/24 kV secondary distribution networks. MGIS49-12 and SafePlus have identical user interfaces.

MGIS49-12 is a completely sealed system with a stainless steel tank containing all live parts and switching functions. A sealed steel tank with constant atmospheric conditions ensures a high level of reliability as well as personnel safety and a virtually maintenance-free system.

This product is in conformity with the standards of IEC62271-200, IEC62271-100, GB3804-2004, GB3906-1991, GB16926-1997, GB/T11022-1999.

Normal operating conditions:

Air temperature: ±40°C; Daily average ≤25°C
Altitude above sea level: Maximum installation altitude: 4000m
Wind: less than 35m/s;
Earthquake intensity: no more than 8 degrees;

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Parameters

Main parameters:

No	Item		Unit	Data
1	Rated voltage			12/24
2	Power Frequency withstand	Dry	kV	42/50
	Power Frequency withstand	Wet	kV	42/50
	Lightning Impulse withstand Voltage (peak value)			75/65
3	Rated Current			630/1250
4	Rated short circuit breaking current (peak)	kA		20
5	Rated closed-loop breaking current	A		630/1250(C)
6	Rated cable charging interrupting current	A		50(C)
7	Rated line cable charging interrupting current	A		10(C)
8	Rated off circuit transformer breaking current	A		16
9	Rated making current (peak)	kA		50/2.5(main switch/grounding)
10	Rated withstand current (peak)			50/2.5(main switch/grounding)
11	Rated short time withstand current			16/20
12	Rated short time withstand time	s		3/4
13	Mechanical life	times		C/F(2000)，V(10000)
14	Main busbar	A		630/1250
14	SF6 Rated pressure (20℃)	MPa		0.014
15	SF6 Annual leakage rate	%		≤0.05
16	Secondary circuit rated power voltage	kv		2
17	Secondary citcuit 1min power frequency voltage	V		AC220/DC48/DC24
18	Protection Degrees	Gas tank		IP65
19		RMU panel indoor installation		IP3X
20		RMU panel with outdoor enclosure		IP54

If having any special requirements, please consult with us before order.

Additional parameters:

MGIS49-12		C-module		F-module		v-module
		Switch disconnector	Earthing switch	Switch-fuse disconnector	Downstream earthing switch	Vacuum circuit-breaker	Earthing switch/ disconnector
Rated voltage	kV	12/17, 5/24	12/17,5/24	12/17,5/24	12/17,5/24	12/17,5/24	12/17,5/24
Rated frequency ⁵⁾	Hz	50/50/50	50/50/50	50/50/50	50/5 0/50	50/50/50	50/50/50
Power frequency withstand voltage	kV	28⁴⁾/38/50	28⁴⁾/38 /50	284,/38 /50	284,/38 /50	28⁴⁾/38/50	28^4)/38/50
Lightning impulse withstand voitage	kV	95/95/125	95/95/125	95/95/125	95/95/125	95/95/125	95/95/125
Rated normai current	A	6 30/630/630		200¹⁾		200/200/200
Breaking capacities:
-active load	A	630/630/630
-closed loop	A	650/650/650
-offload cable charging	A	140/140/140
-offload transformer	A			20/20/20
-earth-fault	A	205/160/160
-earth-fault cable charging	A	117/91/91
-short-circuit breaking current	kA			see²⁾		16/16/16
Marking capacity	kA	52,5/40/40	52,5/40/40	see²⁾5	12,5/12,5/12,	40/40/40	40/40/40
Short tirne current 3 sec,³⁾	kA	21/16/16	21/16/16			16/16/16	16/16/16

Depending on the current rating of the fuse-link
Limited by high voltage fuse-links
Maximum rating for bushings Interface C (400 series bolted)
GOST version is available with 42kV power frequency to withstand voltage
For rated frequency 60Hz de-rating for current parameter needs to be applied

Standard configuration:

D unit configuration

See standard configuration and features of «Cable connecting module without earth switch module»

C unit configuration

See standard configuration and features of «Load break switch module»

F unit configuration

See standard configuration and features of «Load break switch and fuse combination module»

V unit configuration

See standard configuration and features of «Vaccum switch module»

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Solutions

The MGIS49-12 concept offers a choice of either switch-fuse combination or circuit-breaker with relay for protection of the transformer. MGIS49-12 can be supplied with an integrated remote control and monitoring unit.

Standard module function and dimension

Type	Type function	Width(mm)
C	Load break switch	325
F	Switch-fuse combination	325
VCB	3-position switch+VCB	325
M	Metering module	700
Sv	Bus bar section +VCB	650
Rest unit dimension is same: 325mm

Example for CCVC model:

Operating Principle of MGIS49-12 RMU:

The core operational principle of a MGIS49-12 (RMU) lies in its ability to form a closed-loop configuration with the power supply network. This design enables the power to be supplied to the looped network and subsequently distributed to various branches directly from the main trunk line through high-voltage switches. This arrangement offers a distinct advantage: each branch can independently draw power from either side of its connection point on the main loop.

This unique configuration allows for continuous power supply to each branch, even in the event of a failure on one side of the main line. Should the left side experience a failure, the branch can seamlessly draw power from the right side, and vice versa. Despite being fed by a single-circuit power source, this setup mimics the benefits of a dual-feed system, significantly enhancing the reliability and stability of the power distribution network.

In essence, Ring Main Units facilitate a highly resilient power supply system, ensuring that each distribution point remains powered under various conditions, thereby improving the overall reliability of the electrical distribution infrastructure

Benefits of MGIS49-12 RMU:

Ring Main Units offer a comprehensive range of benefits designed to meet the rigorous demands of power distribution networks. These units are engineered to excel in various settings, ensuring consistent performance and safety.

Key advantages include:

Durability and Environmental Resistance: Crafted with an outdoor-ready, fully insulated, and completely sealed structure, these units are built to withstand extreme environmental conditions, ensuring reliable operation in any setting.
Enhanced Safety Features: Equipped with a visible break indicator, these units allow for the easy verification of switch contact positions, significantly enhancing personnel safety by confirming isolation status before maintenance or operational tasks.
Compact and Efficient Design: Their small size, lightweight, and compact structure result in a minimal footprint, making them ideal for space-constrained applications.
Ease of Installation and Operation: Designed for simplicity, these units offer straightforward installation and user-friendly operation. Their reliability and maintenance-free design ensure uninterrupted service and reduced operational costs.
Innovative Linkage Structure: The inclusion of a triple-work linkage system effectively mitigates the risk of equipment malfunctions during operation, enhancing overall system reliability.

METTZ Group is an expert in the production of high-quality electrical equipment, specializing in the manufacturing of a complete set of transmission and distribution equipment within the 10-40.5kV range. The company is dedicated to providing reliable and stable products to its customers, including VCB, RMU, GIS, AIS, DIS and LBS.

METTZ Group continuously introduces international advanced workmanship and equipment since its foundation, and widely cooperates and communicates with experts at home and abroad in technology. The company can supply custom OEM services such as Logo, custom size, or custom merchandise, etc., according to customer requirements.

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Gas-insulated switchgear MGIS49-12