HLHB-12 Environmental Gas Insulated Ring Main Unit
HLHB-12 Environmental Gas Insulated Ring Main Unit

HLHB-12 Environmental Gas Insulated Ring Main Unit

HLHB-12 environmental gas insulated Ring Main Unit is a complete set of power distribution device of 12KV, three-phase AC 50Hz,single bus and single bus segment system.

Feature

Simple Structure, Flexible Operation, Reliable Interlocking, Convenient Installation and So On, and Different Users Can Provide Satisfactory Technical Solutions for Different Applications

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Product Introduction

OVERVIEW

 

HLHB-12 environmental gas insulated Ring Main Unit is a complete set of power distribution device of 12KV, three-phase AC 50Hz,single bus and single bus segment system. The product has the characteristics of simple structure, flexible operation, reliable interlocking, convenient installation and so on, and different users can provide satisfactory technical solutions for different applications. The adoption of sensing technology, automatic control technology and information technology, coupled with advanced technical performance and simple and flexible assembly scheme, can meet the changing needs of the market, and apply to the intelligent requirements of the power grid.

The RMU is suitable for industrial and civil cable ring network and distribution network terminal engineering. As the acceptance and distribution of electric energy, it is especially suitable for urban residential area power distribution, small secondary substation, opening and closing office, cable branch box, box type substation, industrial and mining enterprises, shopping malls, airports, subways, wind power generation, hospitals, stadiums, railways, tunnels and other places.

 

 

SERVICE CONDITIONS

 

Ambient air temperature: -40℃-+50℃

Humidity: Maximum average relative Value, daily<95%, monthly<90%

Altitude: ≤4000 M

Seismic resistance: 8 degrees

Use under special conditions can be negotiated

 

 

MODEL

 

 

 

DIMENSIONS OF THE SWITCHGEAR

 

Cabinet size (W×D×H) Circuit breaker cabinet Cable connection cabinet PT cabinet
Top expansion 420×850×1950 420×850×1950 600×850×1950
Side expansion 420×850×2000 420×850×2000 600×850×1950

 

 

 

TECHNICAL PARAMETER

 

The main technical parameters of the Environmental Gas Insulated RMU

 

Rated voltage kV 12
Rated current A 630
Arc extinguishing method   Vacuum switch tube
lnsulation method   Pure air or nitrogen
Rated short circuit breaking current kV 20
Rated short circuit breaking times Times 30
Rated short-circuit closing current (peak) kV 50
Rated short-time withstand current 3s (rms) kA 20 (Main circuit), 17, 4 (Earthing circuit)
Rated peak withstand current kA 50 (Main circuit), 43, 5 (Earthing circuit)
Power frequency withstand voltage(1min) kV 42 (Phase to earth, phase to phase), 48(breaking)
Lightning impulse withstand voltage kV 75(Phase to earth, phase to phase), 85(breaking)
Partial discharge PC ≤20
Rated sequence of operations of vcbs   O-0.3S-CO-180S-CO
Withstands internal arc faults KA\S 20/0.5
Mechanical life Times 10000 (VCB)   3000 (Isolating switch, Earthing switch)
Main circuit resistance of each phase μΩ 120
Earthing switch rated short-circuit making current (peak value) KA 43, 5
Earthing switch closing times Times 2
Degree of protection MPa IP67 (Gas box), IP4X(body case)
Rated gas pressure (gauge pressure) MPa 0.02
Minimum operating gas pressure 0/0 0
Rated annual leakage rate ppm 0.01
Moisture content in air box kV ≤150
Auxiliary circuit power frequency withstand voltage (1min)   2

 

 

Main technical parameter of circuit breaker

 

Rated voltage 12
Rated current 630
Rated short-circuit breaking current 20
Rated short-circuit closing current (peak) 50
Rated short-time withstand current 3s (rms) 20
Rated peak withstand current 50
Rated sequence of operations O.-0.3s-C.O.-180s-C.O.
Power frequency withstand voltage(1min) 42 (Phase to earth, phase to phase), 48 (breaking)
Lightning impulse withstand voltage (peak) 75 (Phase to earth, phase to phase), 85 (breaking)
Partial discharge ≤5
Mechanical life 10000
Main loop resistance per phase ≤110
Contact spacing 9±1
Contact pressure over-travel 3±0, 5
Contact final pressure 1800±100N
Three-phase opening (different phases) ≤1
Contact closure bounce time ≤2
Closing time ≤70
Opening time ≤60
Average opening speed 1.1+0.2
Average closing speed 0.8+0.2
Rated number of short-circuit current breaks 30

 

 

The main technical parameters of the main circuit (disconnector) of the combined grounding switch on the busbar side

 

Rated voltage kV 12
Rated current A 630
Rated short-time current 3s (rms) kA 20
Rated peak withstand current kA 50
Power frequency withstand voltage (1min) kV 42 (Phase to earth, phase to phase), 48 (breaking)
Lightning impulse withstand voltage (peak) kV 75(Phase to earth,phase to phase), 85 (breaking)
Three-phase opening (different phases) m m ≤2
Mechanical life Time 3000
Total resistance of each phase main circuit μΩ ≤60
Contact pressure N 160+20
Closing force Nm ≤100
Moving and static contact distance mm ≥125

 

 

The main technical parameters of the grounding circuit (grounding switch) of the combinedgrounding switch on the busbar side

 

Rated voltage kV 12
Rated current A 630
Rated short-time withstand current 2s (rms) kA 17, 4
Rated peak withstand current kA 43.5
Power frequency withstand voltage (1min) kV 42 (Phase to earth, phase to phase), 48 (breaking)
Lightning impulse withstand voltage (peak) kV 75 (Phase to earth, phase to phase), 85 (breaking)
Three-phase opening (different phases) m m ≤1
Mechanical life Times 3000
Total resistance of each phase main circuit μΩ ≤60
Contact pressure N 160+20
Closing force nm ≤100
Rated short-circuit closing current KA 43, 5
closing times Times 2
Moving and static contact distance mm ≥125

 

 

Main technical parameters of spring energy storage operating mechanism

 

Auxiliary circuit rated voltage V DC48、DC110, AC220,DC220
Auxiliary circuit power frequency withstand voltage (1min) kV 2
Opening and closing coil voltage V DC48、DC110, AC220、DC220
Opening coil current A 2
Closing coil current A 2
Rated voltage energy storage time S ≤20
Auxiliary switch rated voltage V DC48、DC110, AC220、DC220
Auxiliary switch rated current A 10
Pairs of the auxiliary switch contact   8O 8C

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