Acb 1140V 7500A 3p/4p Customizable Fixed Withdrawable High Voltage Air Circuit Breaker

• Customization: Available
• Breaking Capacity: High Voltage Circuit Breakers
• Operation: Manual Automatic
• Model NO.: LDW9-7500HU
• Speed: Normal Type Circuit Breaker
• Arc-extinguishing Medium: Air
• Installation: Fixed or Withdrawable
• Structure: ACB
• Type: Circuit Breaker
• Ampere Frame Rating: 7500
• Rated Working Current: 4000 5000 6300 7500
• Rated Working Voltage: 50Hz, AC800V, 1140V
• Rated Insulation Voltage: 1150V
• Rated Impulse Withstand Voltageuimp: 12
• Power Frequency Withstand Voltageu: 50Hz 3500
• Trademark: customizable
• Origin: China

Product Description

Product Overview

LDW9 High Voltage Air Circuit Breaker (ACB), also known as an intelligent universal circuit breaker or frame circuit breaker, is designed for power distribution networks operating at an AC 50Hz, with a rated working voltage 800V~1140V and a rated working current of 7500A.
 
This ACB is utilized for the distribution of electrical energy and serves to protect cables and power equipment from various faults, including overload, under-voltage, short-circuits, and grounding issues. It incorporates a range of curve protection controllers that offer comprehensive protection functions, making it particularly suitable for power distribution networks that require enhanced power supply reliability and aim to minimize unnecessary
power outages.

The 3H type smart controller is equipped with a communication interface that facilitates connectivity with field buses, thereby enabling four remote functionalities: "telemetry", "remote adjustment", "remote control" and "remote message" to fulfill the requirements of control automation. The integration of a leakage transformer with the corresponding smart controller provides leakage protection. This device can be utilized for motor fault protection within AC 50Hz, 400V network. Under normal conditions, it is suitable for infrequent starting of motors.

The products have successfully obtained "CQC"certification from the China Quality Certification Center.

 

ACB complies with following standards  

IEC60947-1, GB/T14048.1: Low voltage switchgear and controlgear - General rules
IEC60947-2, GBT14048.2: Low-voltage switchgear and controlgear - Circuit-breakers
IEC60947-4-1, GB/T14048.4: Low-voltage switchgear and controlgear - Contactors and motor-starters
GB/T2421.1: Environmental testing for electric and electronic products - General and guidance
GB/T14597: Environmental climatic conditions appearing in different altitudes for electrical products

Terms of use

Ambient Air Temperature:-5ºC to +40ºC ( Please refer to temperatures derating factor for above +40ºC to +60ºC ).
Installation Location:Install the ACB according to the requirements in the user manual. The altitude shall not exceed 2000m. ( Please refer to high
altitude derating factor for altitudes above 2000m). The vertical tilt of the circuit breaker should not exceed 5° .
Atmospheric Conditions: The relative humidity of the air at the installation site should not exceed 50% at a maximum temperature of +40ºC . At lower
temperatures, higher relative humidity is acceptable, such as reaching 90% at 20ºC . It is important to consider the condensation on the product surface
due to temperature changes.
Pollution Level:III
Installation Category:The circuit breaker main circuit, undervoltage release coil, and power transformer primary coil are used for installation category
IV. The installation category of other auxiliary circuits and control circuits is category II.
ACB is suitable for electromagnetic environments;
Install the ACB in an area free from explosion hazards, conductive dust, metal corrosion and insulation damage. It should be housed in a cabinet with
a door frame, achieving IP54 protection level.
 

Product Description

Model		LDW9-7500HU
Ampere Frame Rating  (A) Inm		7500
Rated working current    (A)In		4000 5000 6300 7500
Rated working voltage (A) Ue		50Hz, AC800V, 1140V
Rated insulation voltage (V)Ui		1150V
Rated impulse withstand voltageUimp(kV)		12
Power frequency withstand voltageU(V)1min		50Hz 3500
No. of poles		3P/4P
Ultimate short circuit breaking capacity (kA)Icu	AC800V AC1140V	65
Operating short circuit breaking capacity(kA)Ics	AC800V AC1140V	65
Rated short-time withstand current  (kA)Icw/1s	AC800V AC1140V	65
Inherent closing time(ms)		23~32
Inherent opening time(ms)		50±10
Arcing distance(mm)		0
Electrical endurance (Cycles)		AC800/1140V:1200/1000
Mechanical endurance (Cycles)	No maintenance	10000
	With maintenance	15000