Industrial Automation Magazine India

Pro-MEC VCB Vacuum Circuit Breakers

Published on : Tuesday 30-11--0001

General

• High reliability of the operating mechanism

  • Separate design of the main circuit from the operating mechanism.

  • Adopt the toggle link method.

  • Improved the reliability of electric circuit.

  • Adopt the rapid auto-reclosing method as a standard option.
    (O-0.3sec.-CO-3min.-CO)

• High interrupting performance

• Make short of the interrupting time. (3cycles)

• Increase the rated short-circuit withstand characteristics. (1sec. to 3sec.)

• Reinforce the insulation in the conduct, by adopting the molded housing in each phase.

• Built in the device making the contacts open first when draw in and out.

• Adopt the tulip-shape connection between the cradle and the VCB.

• Great operational safety

Ratings

• Rated voltage: 7.2kV, 12kV, 17.5kV, 24kV

• Rated normal current: 630A, 1250A, 2000A, 2500A

• Rated short-time withstand current: Max. 40kA

Wide range of accessories (optional)

Applied standard: IEC 62271-100 (M2, E2(List1), C2 class)

Certification: KEMA, KERI

High reliability of the operating mechanism

• Separate design of the main circuit from the operating mechanism.

• Adopt the toggle link method.

• Improved the reliability of electric circuit.

• Adopt the rapid auto-reclosing method as a standard option. (O-0.3sec.-CO-3min.-CO)

High interrupting performance

• Make short of the interrupting time. (3cycles)

• Increase the rated short-circuit withstand characteristics. (1sec. to 3sec.)

Great operational safety

• Reinforce the insulation in the conduct, by adopting the molded housing in each phase.

• Built in the device making the contacts open first when draw in and out.

• Adopt the tulip-shape connection between the cradle and the VCB.

7.2kV Pro-MEC VCBs
Type			LVB-06=-20D	LVB-06=-25D
Rated voltage (kV)			7.2	7.2
Rated normal current (A)			630 1250 2000	630 1250 2000
Rated frequency (Hz)			50/60	50/60
Rated short-circuit breaking current (kA)			20	25
Rated short-circuit breaking capacity (MVA)			250	310
Rated short-time withstand current (kA/3sec)			20	25
Rated short-circuit making current (kAp)			52	65
Rated breaking time (Cycle)			3	3
Rated opening time (sec)			≤ 0.04	≤ 0.04
No-load closing time (sec)			≤ 0.06	≤ 0.06
Withstand Voltage	Power frequency (kV/min)		20	20
	Impulse (kV/1.2×50?)		60	60
Rated operating sequence			O-0.3s-CO-3min-CO	O-0.3s-CO-3min-CO
Type test	Electrical		M2 (10,000 times)	M2 (10,000 times)
	Mechanical		E2 (List1)	E2 (List1)
	Capacitive current switching Note 1)		C2	C2
Lifetime	Maintenance	Without maintenance (Time)	20000	20000
		Maintenance (Time)	30000	30000
	Electrical	Without maintenance (Time)	20000	20000
		Maintenance (Time)	30000	30000
Auxiliary switch			4a4b, 10a10b	4a4b, 10a10b

 

Type			LVB-06=-32D	LVB-06=-40D
Rated voltage (kV)			7.2	7.2
Rated normal current (A)			1250 2000 3150	1250 2000 3150
Rated frequency (Hz)			50/60	50/60
Rated short-circuit breaking current (kA)			31.5	40
Rated short-circuit breaking capacity (MVA)			390	500
Rated short-time withstand current (kA/3sec)			31.5	40
Rated short-circuit making current (kAp)			82	104
Rated breaking time (Cycle)			3	3
Rated opening time (sec)			≤ 0.04	≤ 0.04
No-load closing time (sec)			≤ 0.06	≤ 0.06
Withstand Voltage	Power frequency (kV/min)		20	20

Ceco Electronics Pvt Ltd

KOLKATA