Page 59 - 民电电气有限公司2020

MDM8L 光伏塑壳智能断路器 创造卓越，追求顾客满意
Create Excellence, The Pursuit Of Customer Satisfaction
Photovoltaic plastic shell smart circuit breakers

概述 Overview

光伏塑壳智能断路器 ( 以下简称：断路器 ) 是集剩余电流继电器、接触器、塑壳断路器于一
体的断路器，适用于三相四线中性点接地的供用电系统，对线路或用电设备的接地故障，过
电流、短路、缺相及过压等进行保护。也可防止电气线路或电气设备接地故障引起电气火灾
和电气设备损坏事故及用来对人身触电危险提供间接接触保护。
产品符合 GB14048.2-2008 GB/T22387-2008 标准。
光伏塑壳智能断路器过电流脱扣器为电子式，断路器的额定电流根据线路负载情况可调。三
段保护曲线可调，可与下级断路器配合实现分级保护。电子式过电流脱扣器保护精度高，受
环境温度和安装位置的影响小，为热磁式过电流脱扣器的升级换代产品 ( 本产品有经济型、
标准型两种 )。
光伏塑壳智能断路器设有 RS485 串行接口，可通过编程器设定保护特性参数，同时可满足
通讯组网的要求。
Photovoltaic plastic case intelligent circuit breaker (hereinafter referred to as: circuit
breaker) is a circuit breaker integrating residual current relay, contactor and molded case circuit breaker. It is suitable for three-phase four-wire
neutral point grounding power supply and demand system. Or the ground fault of the electrical equipment, over current, short circuit, phase loss and
over voltage protection. It can also prevent electrical fires and electrical equipment damage caused by ground faults of electrical circuits or electrical
equipment and provide indirect contact protection for personal electric shock hazards.
The product complies with the GB14048.2-2008 GB/T22387-2008 standard.
The photovoltaic molded case intelligent circuit breaker overcurrent release is electronic, and the rated current of the circuit breaker is adjustable
according to the line load condition. The three-stage protection curve is adjustable, and can be combined with the lower-level circuit breaker to achieve
hierarchical protection. The electronic overcurrent release has high protection precision and is affected by the ambient temperature and installation
position. It is an upgraded product of the thermomagnetic overcurrent release (this product is economical and standard).
The photovoltaic molded case intelligent circuit breaker is equipped with RS485 serial interface, which can set the protection characteristic parameters
through the programmer, and can meet the requirements of communication networking.

主要技术参数 The main technical parameters

规格型号 Specification model MDM8L-125 MDM8L-250 MDM8L-400 MDM8L-630 MDM8L-800
壳架电流 Shelf current ln(A) 125 250 400 630 800
40、63 100、160 250、315
额定电流 lr ( 标准型 ) Rated current lr (standard type) 400、500、630 630、700、800
80、100、125 200、250 350、400
额定电流 lr ( 电子式 ) Rated current lr (electronic) (0.4-1.0) xln+off ( 每隔 0.1ln—档可调 )(0.4-1.0) xln+off (can be adjusted every 0.1ln)

额定极限短路分断能力 leu (kA) 30 35 50 65 65
Rated ultimate short-circuit breaking capacity leu (kA)
额定运行短路分断能力 les (kA) 15 22 35 42 42
Rated operating short-circuit breaking capacity les (kA)
额定剩余短路接通 ( 分断 ) 能力 l △ m (kA)Rated residual 7.5 8.75 12.5 16.25 16.25
short-circuiting (breaking) capability l △ m (kA)
75mA/150mA/ 100mA/200mA/ 100mA/300mA/500mA/
额定剩余动作电流 I △ n ( 标准型 ) 300mA/500mA 300mA/500mA 800mA
Rated residual operating current I △ n (standard type)
漏电报警、自动跟踪 Leakage alarm, automatic tracking
额定剩余动作电流 I △ n ( 电子式 )Rated residual operating 50mA/100mA/300mA/500m A/800mA/1000mA/ 漏电报警、自动跟踪
current I △ n (electronic) 50mA/100mA/300mA/500m A/800mA/1000mA/leakage alarm, automatic tracking
额定剩余不动作电流 Rated residual non-operating current 0.5 I △ n
剩余电流分断时间 Residual current breaking time ≤ 0.2S S 型 0.5S 1S
极限不驱动时间 Limit no drive time △ t>0.06s (2 I △ n) (S 型 ) (S-type)
145V±5%( 电压恢复后能自动合闸 )
欠压动作值 ( 标准型 )Undervoltage action value (standard type)
145V±5% (automatically close after voltage recovery)
280V±5%( 电压恢复后能自动合闸 )
过压动作值 ( 标准型 )Overvoltage action value (standard type)
280V±5% (automatically close after voltage recovery)

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