7.2kV Ring Main Unit

Short Description:

Describe

Technical Tables

Drawing

Air Insulation 7.2kv Ring Main Unit Iun-Panel

Features

KYN28A-11/24KV(GZS1) air-insulated metal-clad withdrawable switchgear (hereinafter as “switchgear”) is a necessary indoor power distribution equipment 3-phase AC 50Hz. It is mainly used to receive and distribute 3-24kV network electrical and control protection and monitoring to line circuit. Relay chamber panel can install in various types of microprocessor based relay protection device , and can realize the intelligent control system, with remote control, telemetry, remote communication and remote transfer function, through the CAN communication interface with fieldbus control network to prevent the mal-operation of circuit breaker, to prevent pushing and pulling handcart with load, to prevent grounding switch closed with charged, to prevent the grounding switch in the grounding position transmission and to prevent into live space, which is referred to as the 'five-anti' function. The cabinet is equipped with VS1 (ZN63), ZN12V vacuum circuit breaker, also can be equipped with imported VD4 vacuum circuit breaker and VC series vacuum contactor. The switchgear meet the requirements of standard IEC62271-200,IEC62271-100 etc.

Application

KYN28A-12 metal clad switchgear electrical cubicle is applicable for 3.6kV ~ 12kV with three-phase AC 50Hz single bus or single bus sectional system. It is mainly used for substation and distribution system of power plants, substation, industrial and mining enterprises, building hotels, municipal construction and petrochemical sector as power receiving, power distribution and the circuitcontrolling, protection and monitoring.

Service environment

1. Ambient temperature:-10oC ~ +40oC;

2. Altitude: Not exceed 1000m above sea level;

3. Ambient humidity: Daily average RH ≤ 95%; Monthly average RH ≤ 90%

4. Water vapor pressure:Daily average RH ≤ 2.2kPa; Monthly average RH ≤ 1.8kPa;

5.No violent vibration, bumps and vertical gradient not more than 8° of place

There may be condensation, when the temperature plunged with filth, the products apply to the following two conditions more severe than normal

(1). Condensation not frequently(average monthly not more than two times) with mild pollution;

(2). There is no condensation (average yearly not more than two times) with serious pollution;

Note:

1. Allow to -30℃ to storage and transportation.

2.When the area of altitude exceed 1000m , according to the JB/Z102 «high voltage electrical appliances using the technical requirements of the altitude» , when the altitude is not more than 2000m, low pressure auxiliary equipment does not need to take any measures.

3.When the actual use conditions is different with the above mentioned information, the user and the manufacturer should be negotiated

Technical data

No	Name		Unit	Parameter
1	Insuation level	Rated voltage	kV	3.6	7.2	11
		1minpower frequency withstand volatge	kV	24	32	42
2	Lightning impulse withstand voltage (full wave)		kV	40	60	75
3	Rated frequency		Hz	50/60
4	Rated current		A	630.1250.1600.2000.2500.3150
5	4s short time withstand current		kA	20、25、31、31.5、40、50
6	Rated peak withstand current		kA	50、63、80、100、125
7	Protection level			Enclosure IP4X, partition of each compartment is IP2X

Vaccum Circuit Breaker

No	Name		Unit	VS1、ZN12V	VD4
1	Insuation level	Rated voltage	kV	11
		1min power frequency withstand volatge	kV	42
2	Lightning impulse withstand voltage (full wave)		kV	75
3	Rated frequency		Hz	50/60
4	Rated current		A	630.1250.1600.2000,2500.3150
5	Rated short circuit break current		kA	20、25、31、31.5、40、50
6	4s short time withstand current		kA	20、25、31、31.5、40、50
7	Rated peak withstand current		kA	40，50、63，80，100，125
8	Rated operate sequence			0-0.3S-c0180S-CO
9	Rated short circuit break current>40kA, operation sequence			0-180sco-180s-co
10	Closing sequence			≤70	≈60
11	Open sequence			≤50	≤45
12	Arcing time			≤15	≤15
13	Break time			≤65	≤60

The enclosure is made of aluminium-zinc plated steel sheet by CNC machine, high precise dimension, short production cycle,excellent mechanical strength and nice appearance. The busbar compartment, VCB handc art compartment, cable compartment and relay compartment are separated by metal sheet. Flexible operation for handcart movement, clear position instruction, the earthing switch allow to making short circuit current and creditable mechanical interlock.