KYN 28A-12/24

Normal service conditions

1. Environmental conditions: -15℃~+40℃, and the average value measured within 24h shall not exceed 35℃;

2. The temperature conditions are as follows: the average value of daily relative humidity shall not exceed 95%; The average monthly relative humidity shall not exceed 90%; The average value of daily water vapor pressure shall not exceed 2.2kpa; The average monthly water vapor pressure shall not exceed 1.8kpa;

3. Mounting Height:≤1000m (Altitude)

4. The surrounding air is not obviously polluted by dust, smoke, corrosive or combustible gas, steam or salt mist;

5. Vibration or ground motion from the outside of switchgear and control equipment can be ignored;

6. The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6kv .

Type meaning

KYN 28A-12KV

华通型号说明.png

KYN 28A-24KV

华通型号说明.png

Main technical parameters

KYN28A-12

No.	Project				Unit	Parameters
1	Rated voltage				KV	3.6,7.2,12
2	Rated frequency				HZ	50
3	Rated current of circuit breaker				A	630,1250,1600,2000,2500,3150
4	Rated current of cabinet				A	630,1250,1600,2000,2500,3150
5	Rated short-time withstand current (4S)				KA	20,25,31.5,40
6	Rated peak withstand current (peak)				KA	50,63,80,100
7	Rated short-circuit breaking current				KA	20,25,31.5,40
8	Rated short-circuit making current (peak)				KA	50,63,80,100
9	Rated insulation level	1min power frequency withstand voltage		Between phases、Phase to ground	KV	24,32,42
		1min power frequency withstand voltage		Between fractures	KV	24,32,42
		Lightning impulse withstand voltage	Between phases、Phase to ground		KV	40,60,75
		Lightning impulse withstand voltage	Between fractures		KV	46,70,85
10	Degree of protection					The enclosure is IP4X, and the compartment is IP2X when the door of the circuit breaker room is opened

KYN28A-24

1.Technical parameter

No.	Project		Unit	Parameter
1	Rated Voltage		KV	24
2	Rated frequency		HZ	50/60
3	Rated insulation level	Lightning impulse withstand voltage (peak)	KV	Phase to ground	60		Isolation fracture	79
		1min power frequency withstand voltage (effective value)	KV		125			145
		Power frequency withstand voltage of auxiliary control circuit	V	2000
4	Rated current		A	630,1250,1600,2000,2500,3150
5	Rated short-circuit breaking curren		KA	20	31.5
6	Rated short-circuit making current (peak)		KA	50	80
7	Rated short-time withstand current (4S)		KA	20	31.5
8	Rated peak withstand current		KA	50	80
9	Rated voltage of auxiliary control circuit		A	DC/AC 110/220
10	Degree of protection			IP4X(Circuit breaker room door open or compartment：IP2X)
11	Overall dimension（W×D×H）		MM	800×1810×2380		1000×1810×2380
12	Weight		KG	840~1440

Note: the depth of overhead incoming and outgoing line cabinet is 2360mm

2、VS1-24 、VN2-24 Main technical parameters of vacuum circuit breaker

No.	Project		Unit	Parameter
1	Rated voltage		KV	24
2	Rated insulation level	1min power frequency withstand voltage (effective value)		60
		Lightning impulse withstand voltage (peak)		125
3	Rated frequency		HZ	50/60
4	Rated current		A	630,1250,1600,2000	630,1250,1600,2000,2500,3150
5	Rated short-circuit breaking current		KA	20	31.5
6	Rated short-circuit making current (peak)			50	80
7	Rated short-time withstand current（4s）			20	31.5
8	Rated peak withstand current			50	80
9	Rated breaking current of single capacitor bank		A	630
10	Rated back-to-back capacitor bank breaking current			400
11	Rated short-circuit breaking current breaking times		Times	50
12	Mechanical life			20000
13	Rated operating sequence			O-0.3S-CO-180S-CO

3、Technical parameters of spring operating mechanism

No.	Project		Unit	Parameter
1	Rated voltage	Closing trip coil	V	AC220,AC110,DC220,DC110
		Opening trip coil
2	Rated current	Closing trip coil	A	AC220/DC220：1.1 AC1100/DC110：3.1
		Opening trip coil
3	Energy storage motor power		W	100
4	Rated voltage of energy storage motor		S	AC220,AC110,DC220,DC110
5	Electric energy storage time		V	≤110

Structure and working principle

KYN28A-12

华通型号说明.png

Overall dimension（mm）

Height		2300
Width	Rated current below1250A	800
Width	Rated current below1600A	1000
Depth	Cable incoming and outgoing	1500
Depth	Overhead incoming and outgoing	1660

Installation dimension（mm）

Cabinet width	Cabinet depth	L1	L2	L3	L4
800	1500 Cable	530	630	150	490
800	1660 Overhead	530	630	310	650
1000	1500 Cable	730	830	150	490
1000	1660 Overhead	730	830	310	650

KYN28A-24

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Main circuit scheme diagram

KYN28A-24

Scheme No.		01			02		03		04						05
Primary circuit scheme
Rated current		630~3150
Primary main electrical components
Vacuum circuit breaker VS1-24		1			1		1		1						1
Current transformerLZZB9-24		2			2		2		3						3
PT JDZ11-20/JDZX11-20
Fuse XRNP-24 0.5A
Grounding switch JN15-24							1
Lightning arrester HY5WZ-32/84							3
Purpose		Power receiving and feeding			Feeding		Feeding		Power receiving and feeding						Feeding
Scheme No.		06			07		08		09						10
Primary circuit scheme
Rated current		630~3150
Primary main electrical components
Vacuum circuit breaker VS1-24		1	1			1			1			1
Current transformerLZZB9-24		3	2			2			3			3
PT JDZ11-20/JDZX11-20
Fuse XRNP-24 0.5A
Grounding switch JN15-24		1				1						1
Lightning arrester HY5WZ-32/84		3
Purpose		Feeding	Contact (right)			Contact (right)			Contact (left)			Contact (left)
Scheme No.		11	12			13			14			15
Primary circuit scheme
Rated current	630~3150
Primary main electrical components
Vacuum circuit breaker VS1-24	1		1				1			1				1
Current transformerLZZB9-24	3		3				2			2				3
PT JDZ11-20/JDZX11-20	2		2				3			3				3
Fuse XRNP-24 0.5A	3		3				3			3				3
Grounding switch JN15-24
Lightning arrester HY5WZ-32/84
Purpose	Metering+incoming		Metering+incoming				Metering+incoming			Metering+incoming				Metering+incoming
Scheme No.	16		17				18			19				20
Primary circuit scheme
Rated current		630~3150
Primary main electrical components
Vacuum circuit breaker VS1-24		1
Current transformerLZZB9-24		3						3
PT JDZ11-20/JDZX11-20		3						3			4		4
Fuse XRNP-24 0.5A		3		XRNT3				XRNT3			3		3
Grounding switch JN15-24								3			3		3
Lightning arrester HY5WZ-32/84
Purpose		Metering+incoming		Transformer for Substation				Capacitor cabinet			PT+Lightning arrester		PT+Lightning arrester

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