SF6 Insulated RMU-17.5kV With Cable Test Port

SF6 Insulated RMU-17.5kV With Cable Test Port插图2

The product adopts a modular design that can be arbitrarily arranged according to different design schemes and is a perfect combination of a common box unit and an extended unit, which can satisfy the needs of various secondary substations for the flexible use of compact switchgear. The SS series switchgear devices are fully sealed systems, with all live parts and switches enclosed within stainless steel enclosures. They are immune to environmental influences and provide reliable operation. The products are characterized by compact structure, maintenance-free operation, and long lifespan, meeting the requirements for both indoor and outdoor operation. The products have passed the type test certification of the national-level High Voltage Apparatus Testing Center and are widely used in various fields including distribution substations, box-type switchgear, industrial and mining enterprises, airports, railways, commercial areas, high-rise buildings, highways, subways, tunnels, and harsh environmental conditions.

Category: Switchgears

Description

Description

GEE SS SERIES COMPACT-RING MAIN UNIT UP TO 17.5 KV

Reliable solution for power distribution networkSF6 gas for insulation and for load break switching functions
Vacuum technology for fault breaking (VCB)
Self-power relay for high level of protections in all conditions
Reliable breaker mechanism operation with low power trip coil
High quality full welded tank IP 67 with leakage rate less than 0.1% per year
High protection against pollution and humidity by enclosure lP54
Maintenance free and expected life of the product more than 30 years
Safe and easy operation with full interlocking system and padlock options
Integrated cable test facility
Full Automation /smart functions

TYPE TESTED IN LABORATORIES ACCORDING IEC:

Dielectric tests:
Measurement of the resistance of circuits
Temperature-rise tests
Verification of the protection
Short-time withstand current and peak withstand current
Internal arc tests (tank and cable compartments) Accessibility type A (sides FLR)
short-circuit making and breaking test duties
Making and Breaking test duties for switches
Mechanical Endurance

Reference Standard

GEE SS series- fully complies with IEC standards and can be customized with more features to be comply with any customer specifications

IEC-62271-200	metal-enclosed switchgear and controlgear
IEC-62271-1	AC switchgear and controlgear
IEC-62271-103	AC switches
IEC-62271-100	Circuit Breaker Standards
IEC-62271-102	AC disconnectors and earthing switches
IEC 62271-213	Voltage detecting and indicating system

Relay,Earth fault indicator,capacitive voltage indicator,RTU and all electrical equipment are full comply and type tested according their related IEC standards

Product technical characteristics

Item	Unit	Load switch unit	Circuit breaker unit
Rated Voltage	kV	17.5	17.5
Rated frequency	Hz	60	60
Rated current	A	400	400
Power frequency withstand voltage (phase-to-phase and relatively)	/	38	38
Power frequency withstand voltage(between fractures)	/	45	45
Power frequency withstand voltage(control and auxiliary loops	/	2	2
Lightning shock withstand voltage (phase-to-phase and relatively)	/	95/110	95/110
Rated for short-term withstand current	kA	21/1s	21/1s
Rated peak withstand current	kA	54.6	54.6
Rated short-circuit closing current	kA	54.6	54.6
Rated short-circuit breaking current	kA	/	21
Rated transfer current	A	/	/
Rated active load breaking current	A	400	/
Item Rated closed-loop breaking current	A	400	/
Mechanical life:load switch/circuit breaker	time	5000	10000
Mechanical life:isolation/grounding switch	time	2000	1000
Inflation pressure:Rated inflation pressure	Mpa	0.04	0.04
(G/C at 20℃）	%	≤0.01	≤0.01
Internal Arc Classification((indoor & outdoor)			21kA/1s

GEE SS series- switchgear operates under normal indoor conditions:
Maximum temperature: +75°C

Minimum temperature: -40°C

24-hour average maximum temperature: +35°C

Humidity: Maximum average relative humidity (2 4-hour measurement) 95%
Maximum average relative humidity(1 month measurement) 90%

In the case of installation without reducing the gas pressure: the maximum altitude is 1500 m

GEE SS series- switchgear applications in outdoor operation:

Altitude:≤4000m

Ambient temperature: maximum temperature: +50 °C; The average temperature within 24h does not exceed +35°C

Ambient humidity: 24h relative humidity average does not exceed 95%; The average monthly relative humidity doesn’t exceed 90%

Installation environment: the surrounding air is free of explosive and corrosive gases, and there is no violent vibration in the installation site impact, pollution level does not exceed THE lll. level in GB/T5582;

Ground acceleration caused by earthquakes: below the horizontal direction. 3g, Vertically below. 15g

PRODUCT STRUCTURE DIAGRAM

GEE SS series- Ring design has a compact design up to 4 function units which can be arranged as in one compact tank without any extensions connection.

it has Load break switches and vacuum circuit breaker/s are full insulated by SF6 gas inside full welded stainless steel tank which is integrated with an embedded to enclosure lP54

The design allows for maximum space for easy power cable installation (750 mm from bushings to cable clamp) with width of cable compartment 400 mm

And at the same time keeping convenient height of operation mechanism and control compartment