Type 450 Air Circuit Breaker (AC400~690V)-Air Circuit Breaker-Electrical Equipment Supply-Zhejiang Leidun Electric Co., LTD

Air Circuit Breaker

Type 450 Air Circuit Breaker (AC400~690V)

LDW9 Series

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Type 450 Air Circuit Breaker (AC400~690V)

Product Overview

LDW9 Type 450 Air Circuit Breaker (ACB) is a newly developed product by our company, utilizing advanced research and development technology. This device is characterized by its small size, high breaking capacity, and multifunctional capabilities.

It is suitable for general distribution systems, new energy generation and distribution systems, multi-source distribution networks, inverters, and grid connection operations and protection for distributed power sources such as rotating motor power supplies.

It complies with the circuit breaker standard GB/T14048.2 for Class B usage category.

Model Description Main technical parameters Appearance and Installation dimensions (mm)

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LEIDUN

ACB

Design No.

Ampere Frame Rating

Poles

Rated Current

（A）

High Breaking Capacity Marked "H"

Model				LDW9-1600
Ampere Frame Rating (A) Inm				1600
Rated Current (A) In				200、250、320、400、500、630、800、1000、1250、1600
Rated working voltage (V) Ue				AC50Hz/60Hz 400，690
Rated insulation voltage (V) Ui				1000
Rated impulse withstand voltage (kV) Uimp				12
Power frequency withstand voltage (V) U/Imin				2500
No. of poles (P)				3、4
N-pole rated current (A) In				100%In
Use Category	GB/T14048.2			B
	GB/T14048.4 (In≤1000A)			AC-3
Ultimate short circuit breaking capacity (kA) Icu (Effective value)	AC400V			55
	AC690V			42
Operating short circuit breaking capacity (kA) Ics (Effective value)	AC400V			50
	AC690V			35
The rated short-circuit making capacity (peak value) (kA) Icm	AC400V			143
	AC690V			105
Rated short-time withstand current (Is) Icw (kA) (Effective value)	AC400V			50
	AC690V			35
Full breaking time (without additional delay) (ms)				25
Closing time (ms)				MAX. 70
Electrical endurance (Cycles)	AC400V	In=200A~1000A		1500
		In=1250A~1600A		1200
	AC690V	In=200A~1000A		1000
		In=1250A~1600A		700
Mechanical endurance (Cycles)	No maintenance			3000
	With maintenance			10000
External dimensions (Length x Width x High)(mm)	Fixed	3P	263×240×310	Withdrawable	3P	275×330×345
		4P	333×240×310		4P	315×330×345

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