BGZ21C-40.5D Sealed indoor vacuum circuit breaker (5 in 1)

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• Classification Series ：Wind-Light Storage Circuit Breaker • Product Name ：BGZ21C-40.5D Sealed indoor vacuum circuit breaker (5 in 1) • Product Overview： BGZ21C-40.5D series indoor high-voltage AC vacuum circuit breakers with isolation and vacuum load switch-fuse combination appliances are a new-generation full range of new products with domestic innovation level independently ...

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▸ Product Introduction

Product overview

BGZ21C-40.5D series indoor high-voltage AC Vacuum Circuit Breakers with isolation and vacuum load switch-fuse combination appliances are a new-generation full range of new products with domestic innovation level independently developed and designed by Boxd Group Co., Ltd. on the basis of absorbing advanced technology at home and abroad and abandoning the common shortcomings in the current industry.

Model decoding

BGZ: Wind & PV Circuit Breaker.

21: 21st generation technology platform

LR: Low Voltage Ride-Through function.

40.5: Rated voltage (kV)

Solve the pain point of new energy

Insulation strengthening at high altitude (5000m)

Frequent switching (daily operation ≥10 times)

Voltage fluctuation (0.8~1.2Un) is stable.

Special protection needs

Low voltage ride-through (BGZLR21): continuous power supply without tripping when the power grid drops to 20%Un.

Anti-vibration: passed the inspection of Wind Power Anti-vibration Company.

Intelligent early warning

Accumulated interrupting current reaches 80% Isc life value → report to SCADA actively.

Energy storage capacitor capacity < 85% → trigger replacement alarm.

Special maintenance

Salt spray environment: clean the insulation surface every 6 months (special neutral cleaning agent).

Cold region: Silicon-based grease is prohibited below -30℃ (fluoroether grease is used instead).

Annual inspection items: the analog voltage drops to 0.2Un, and the closing time of the test circuit breaker is ≥625ms.

Technical parameter

Parameter	Unit	BGZ21-40.5	BGZLR21-40.5
Rated voltage	kV	40.5	40.5
Rated current	A	1600/2000/2500	2000/3150
Rated short-circuit breaking current	kA	31.5	40
DC component breaking capacity	%	40	≥50
Operating life	Frequency	≥60,000	≥100,000
Voltage working range	p.u.	0.8~1.1 Un	0.2~1.2 Un
Dielectric level
Power frequency withstand voltage (wet state)	kV	95	95
Lightning impulse (5000m correction)	kV	220 (fracture)	220 (fracture)
Mechanical properties
Opening time	ms	≤50	≤45
On-off time	ms	≤65	≤60

Parameter	Unit	BGZ21-40.5	BGZLR21-40.5
Rated voltage	kV	40.5	40.5
Rated current	A	1600/2000/2500	2000/3150
Rated short-circuit breaking current	kA	31.5	40
DC component breaking capacity	%	40	≥50
Operating life	Frequency	≥60,000	≥100,000
Voltage working range	p.u.	0.8~1.1 Un	0.2~1.2 Un
Dielectric level
Power frequency withstand voltage (wet state)	kV	95	95
Lightning impulse (5000m correction)	kV	220 (fracture)	220 (fracture)
Mechanical properties
Opening time	ms	≤50	≤45
On-off time	ms	≤65	≤60