HBN-12 Energy-Saving & Environmentally Friendly Fully Insulated Ring Main Unit

HBN-12 Environmentally Friendly Fully Insulated Ring Main Unit Product Introduction

1. Overview

Since the 1950s, medium-voltage switchgear has gone through stages such as open type, box type, and metal-enclosed type. There is no longer any problem in meeting the functional usage requirements of the equipment. Meanwhile, the products have been serialized and normalized with a wide range of applications. Compact, safe, reliable, highly integrated and fully enclosed environmentally friendly gas-insulated ring main units have developed rapidly. They can realize remote monitoring, control and management of power system distribution networks, and achieve the intelligent field of electrification, informatization, energy management and energy-saving consumption reduction; the system can be widely applied to transportation, factories, hospitals, schools, buildings, residential quarters and other intelligent power distribution fields.

The HBN-12 environmentally friendly fully insulated ring main unit adopts leading production equipment and manufacturing technology to realize localized production, which greatly reduces manufacturing costs, shortens delivery cycles, and has been well received since its launch.

2. Model Significance

Note: Definition of enterprise model number:
HBN-E-V: Expandable circuit breaker scheme
HBN-E-C: Expandable load switch scheme
HBN-E-T: Expandable load switch-fuse combination electrical scheme
HBN-V/C/C: Non-expandable circuit breaker + load switch + load switch three-unit common box scheme

3. Application Notes

The above parameters comply with the technical specifications for 12kV switchgear Class II grounding systems of State Grid Corporation of China, China Southern Power Grid Corporation and Jiangsu Electric Power Company, for neutral point grounding modes with different rated short-circuit breaking capacities.
The HBN-12 series 12kV electrical accessories can realize the combination of three electrical circuits or two electrical circuits plus one lightning protection circuit.
Note: Class I: Neutral point resistance grounding system; Class II: Neutral point arc suppression coil grounding or ungrounded system.

4. Product Features

Adopts environmentally friendly fully insulated structure, with safe and reliable operation, and no pollution to the environment.
Localized production reduces manufacturing costs and shortens delivery cycles, with high cost performance.
Supports remote monitoring and control of distribution networks, realizing electrification and informatization of power management.
Compact structure, small footprint, suitable for various scenarios such as factories, hospitals, residential quarters, etc.
High integration and complete functions, meeting the intelligent power distribution needs of various occasions.

5. Technical Parameters

Item		Unit	Circuit Breaker	Load Switch
Rated Voltage		kv	12	12
Rated Current		A	630	630
Rated Frequency		Hz	50	50
Rated Insulation Level	1min Power Frequency Withstand Voltage (Phase-to-Phase and Phase-to-Ground)	kv	42	42
	1min Power Frequency Withstand Voltage (Interrupting Fracture)		48	48
	Power Frequency Withstand Voltage (Control and Auxiliary Circuits)		2	2
	Lightning Impulse Withstand Voltage (Phase-to-Phase and Phase-to-Ground)		75	75
	Lightning Impulse Withstand Voltage (Interrupting Fracture)		85	85
Rated Short-Circuit Breaking Current		kA	20	-
Rated Short-Circuit Making Current		kA	50	50
Rated Short-Time Withstand Current		kA	20	20
Rated Duration of Short-Circuit Withstand Current		s	4	4
Rated Peak Withstand Current		kA	50	50
Closing Current / Transfer Current		A	-	-
Rated Operating Sequence		-	O-0.3s-CO-180s-CO
Rated Inflation Pressure (Gauge Pressure at 20°C)		MPa	0.02
Minimum Functional Pressure (Gauge Pressure at 20°C)		MPa	0
Pressure Relief Device Discharge Pressure (Gauge Pressure at 20°C)		MPa	0.16
Annual Leakage Rate		-	≤0.01%
Mechanical Life		times	10000	10000
Main Circuit Resistance		μΩ	≤150	≤150

6. Ordering Instructions

When ordering HBN-12 environmentally friendly fully insulated ring main units, please provide the following information to ensure the products meet actual usage requirements:

Exact product model and specifications (including rated current, short-circuit withstand current, etc.)
Main switch type (circuit breaker/load switch/load switch-fuse combination)
Operating environmental conditions (if there are special requirements)
Special technical requirements (such as actuator type, expansion scheme, etc.)