🔌 Medium Voltage Ring Main Unit

Econo Solar

HXGN□-12 (SF6)

Name: HXGN□-12 (SF6) Unit-Type AC Metal-Enclosed Ring Main Unit
Brand: Econo Solar
Availability: InStock

Unit-Type AC Metal-Enclosed Ring Main Unit

Compact, SF6-insulated 12kV ring main unit built around a vacuum load switch, with interlocked incoming and outgoing cabinet schemes. Sized for ring-fed medium-voltage access points across a PV plant's collection network, where a full breaker lineup would be oversized.

12 kV

Rated Voltage

630 A

Bus Current

IP3X

Protection

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Key Features

Why Engineers Choose the HXGN-12

Datasheet-backed advantages for compact ring-feeder access points.

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SF6 Gas-Insulated Switching

Main switch and arc-quenching chamber are sealed in SF6 gas, giving a smaller footprint than air-insulated designs of equivalent rating.

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Three-Position Operation

The load switch, isolating knife and earthing knife share one interlocked frame, giving bus-connect, isolate and earth positions with a single, simple handle sequence.

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Fused Outgoing Option

The outgoing cabinet scheme adds a striker-fitted fuse acting as an automatic isolating switch — a fuse failure trips the load switch without operator action.

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"Five-Prevention" Interlocking, IP2X Internal

Insulating baffles interlocked with the earthing switch, plus mechanical interlocks between switch, baffle and door, meet the five-prevention standard with IP2X at internal switching compartments.

Specifications

Complete Technical Datasheet

Parameters sourced from the manufacturer's HXGN□-12(SF6) technical datasheet. Fields the source table does not state unambiguously are marked [DATA REQUIRED].

Rated Voltage	12 kV
Rated Frequency	50 Hz
Main Bus Bar Rated Current	630 A
Fuse Breaker Max. Rated Current	125 A
Main / Earthed Loop Short-Time Withstand Current	[DATA REQUIRED]
Main / Earthed Loop Rated Peak Withstand Current	50 kA
Main / Earthed Loop Short-Circuit Making/Breaking Current	50 kA
Load Switch Full-Capacity Operations	100 operations
Fuse Breaker Opening Current	31.5, 40 kA
Rated Closed-Loop Opening Current	630 A
Rated Transfer Current	1600 A
Mechanical Life	2000 operations
1-min Power-Frequency Withstand Voltage (to earth / across isolating gap)	42 / 48 kV
Lightning Impulse Withstand Voltage, peak (to earth / across isolating gap)	75 / 85 kV
Secondary Circuit 1-min Power-Frequency Withstand Voltage	2 kV
Protection Degree	IP3X (enclosure) / IP2X (switching compartment)
Main Switch	ZFN□-10/630 vacuum load switch, SF6-insulated
Breaker Options	SFL-12/24 · ABB HAD/US SF6 · VD4-S vacuum
Operating Mode	Manual / Electric
Altitude	≤2000 m
Operating Ambient Temperature	−25 °C to +40 °C
Storage Temperature	−30 °C to +40 °C
Standards	IEC 60298 · GB 3906

Applications

Where the HXGN-12 Fits Best

Optimized for compact medium-voltage ring access in solar and hybrid energy plants.

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PV Collection Ring Feeders

Compact tap points along a 12kV ring or loop collecting multiple inverter stations or transformer pads into a shared MV feeder.

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Transformer Protection (Outgoing Scheme)

Fused outgoing cabinet protects individual step-up or distribution transformers without the cost of a full circuit breaker cubicle.

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Compact Substation Rooms

Where substation footprint is constrained, the SF6-sealed unit replaces several air-insulated cubicles worth of ring access in one compact enclosure.

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Distributed BESS Tie-Ins

Ring-fed connection points for distributed battery storage blocks feeding into the same MV collection loop as the PV arrays.

FAQ

What Engineers Ask About the HXGN-12

Datasheet-driven answers for procurement teams and switchgear designers.

What insulating medium does the HXGN-12 use?

The HXGN□-12 uses SF6 gas as the insulating and arc-quenching medium around its main switching device, which is typically a ZFN□-10/630 type vacuum load switch.

What is the difference between the incoming and outgoing cabinet schemes?

The incoming cabinet scheme uses a vacuum load switch with isolating and grounding knives on one interlocked frame for three-position (bus, isolate, earth) operation. The outgoing cabinet scheme replaces the plain load switch with a fused load switch (with striker) plus a grounding knife, so a fuse failure trips the switch automatically.

What protection degree does the HXGN-12 cabinet carry?

The overall cabinet enclosure is rated IP3X. The internal incoming/outgoing switching compartments, which are interlocked with the earthing switch and protected by an insulating baffle, are rated IP2X per GB 3906.

What breaker or switch options are available in the HXGN-12?

Standard configuration uses a ZFN□-10/630 vacuum load switch. Circuit breaker variants can be fitted with an SFL-12/24 switch assembly, an original ABB HAD/US type SF6 breaker, or a VD4-S vacuum circuit breaker, in manual or electric operating versions.

What altitude and temperature range does the HXGN-12 support?

Standard rating covers altitude up to 2000m and an ambient temperature range of −25°C to +40°C, with daily average relative humidity not exceeding 95% and monthly average not exceeding 90%.

Why use a ring main unit instead of a full switchgear lineup for PV ring feeders?

A ring main unit like the HXGN-12 packages the load switch, isolator and earthing switch for one ring connection point into a single compact, sealed unit, cutting substation footprint compared to stringing together separate switchgear cubicles for each ring tap.