ZBL-L Mine low voltage leakage protection device Brief Introduction

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ZBL-L Mine low voltage leakage protection device Brief Introduction

ZBL-L Mine low voltage leakage protection device Brief Introduction

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ZBL-L Mine low voltage leakage protection device uses a modern design technology leakage protection device, compared with the same type of product safety performance good economic advantages, ZBL-L mine low voltage leakage protection device is suitable fo

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ZBL-L Mine low voltage leakage protection device Brief Introduction

ZBL-L Mine low voltage leakage protection device uses a modern design technology leakage protection device, compared with the same type of product safety performance good economic advantages, ZBL-L mine low voltage leakage protection device is suitable for coal mine methane and coal dust with a dangerous place, as a low voltage 380V ~ 1140V ungrounded system leakage protection.

ZBL-L Mine low voltage leakage protection device Parameters

Control voltage380V660V1140V
Power supply: control voltage.
bus segment number1
Number of branches: 9. Installed in the second stage (the branch switching transformer and with certain provisions under the shunt switch), the branch number is 8.
Mine low voltage leakage protection device action resistor values and latching action resistor values
voltage level: 380
660 1140
action resistor values 3.5K
±20% 11K±20% 20K±20%
latching action resistor values
7K±20% 22K±20% 40K±20%
Action time: branch export time 30 milliseconds; Total exports time 300 milliseconds. Can be arbitrarily set.
Ability to adapt to changes in the power supply: Power supply change in the rating of 75% to 110%, the resistance value of the device leakage action, leakage blocking resistance value and operating time of the error is less than 20%.
Low voltage system capacitance change adaptation: When the system capacitor 0.1μf ~ 1μf range of changes, the device leakage resistance movement, leakage blocking resistance value and operating time of the error is less than 20%.
Dispersion leakage resistance resolution: Action resistor setting value 20% +2 K.
Relay export output: total exports and exports into the line corresponding to one, are normally open dry contact, contact capacity 1A; 380VAC.
Dimensionwidth310×depth280×height410

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