YBM-12(24)/0.4 Series Prefabricated Substation

YBM prefabricated substations (European‑style pad-mounted substations) integrate high‑voltage switchgear, distribution transformers, and low‑voltage switchgear within three separate compartments, with electrical connections established via cables or busbars. All high‑ and low‑voltage switchgear and transformers employed are standard, off‑the‑shelf products. The intelligent prefabricated substation series combines high‑voltage switchgear (RM6 or SFG, or domestically produced load switches equipped with electrically operated remote automatic control units), transformers, low‑voltage switchgear, smart low‑voltage switches, and reactive power automatic compensation into a single unit according to a specified wiring configuration, enabling local or remote operation with functions such as remote control, remote measurement, remote metering, and remote adjustment. These substations are suitable for public distribution networks, ring‑network and terminal‑supply systems operating at rated voltages of 24 kV and below, with a rated frequency of 50 Hz, and are designed for applications in residential communities, industrial and mining enterprises, large construction sites, high‑rise buildings, airports, ports, and temporary facilities, with capacities up to 2,500 kVA.

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Box-type Substation Series

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Product Description

　　Overview

　　YBM prefabricated substations (European‑style pad-mounted substations) integrate high‑voltage switchgear, distribution transformers, and low‑voltage switchgear within three separate compartments, with electrical connections established via cables or busbars. All high‑ and low‑voltage switchgear and transformers employed are standard, off‑the‑shelf products. The intelligent series of prefabricated substations combines high‑voltage switchgear (RM6 or SFG, or domestically produced load switches equipped with electrically operated remote automatic control units), transformers, low‑voltage switchgear, smart low‑voltage switches, and automatic reactive power compensation into a single unit according to a specified wiring configuration, enabling local or remote operation with functions such as remote control, telemetry, remote metering, and remote adjustment. These substations are suitable for public distribution networks, ring‑network and terminal‑supply systems operating at rated voltages of 24 kV and below, with a rated frequency of 50 Hz, and are designed for applications in residential communities, industrial and mining enterprises, large construction sites, high‑rise buildings, airports, ports, and temporary facilities, with capacities up to 2,500 kVA.

　　Ordering Instructions

　　When placing your order, please provide the following parameters:

　　1. Transformer model, specifications, and winding connection group;

　　2. Main wiring diagrams for high and low voltage, along with model numbers and technical specifications of major electrical components;

　　3. Should the load switch be equipped with an electric operating mechanism?

　　4. Cross-sectional area of the incoming cable;

　　5. Please submit any special requirements to the manufacturer.

　　Technical Performance Parameters

	Project	Unit	Parameter
High-pressure section	Rated frequency	Hertz
	Rated voltage	KV	20	10
	Maximum operating voltage	KV	24	12
	Working withstand voltage to ground and between phases/isolation gap	KV	65/79	42/48
	Lightning impulse withstand voltage to ground and between phases/isolation gaps	KV	125/145	75/85
	Rated current	A	400	630
	Rated short-time withstand current	KA	16(2S)	20(2S)
	Rated peak withstand current	KA	40	50
Low-pressure section	Rated voltage	V	380	220
	Rated current of the main circuit	A	100–4000
	Rated short-time withstand current	KA	15	50
	Rated peak withstand current	KA	20	105
	Branch current	A	10 to 800
	Number of branch circuits	road	1 to 12
	Compensation capacity	four	0 to 360
Transformer Section	Rated capacity	KVA	4 50–2500
	Impedance voltage	%	4.5 6 (Dry-type transformer)
	Tap range		±2×2.5%	±5%
	Connection Group		Y,yn0	D,yn11