In the previous operation and management of distribution transformers, the adjustment of deviation was based on the electrician's regular observation of the three-phase current in the distribution room as the basis for load adjustment. This method is both troublesome and unscientific. Because when electricians go to the distribution room to check, it may happen to be the peak or low load of the line, which has a great deal of randomness and makes it difficult to accurately adjust and balance the three-phase load.

Our company has launched a three-phase current imbalance recorder (hereinafter referred to as the recorder), which is a handheld electrical measuring instrument suitable for on-site use. The working power supply of this recorder is directly taken from the power grid, and it has an extremely wide adaptability range; Using professional sampling chips with high accuracy and stability; The interface display adopts a high point array large screen LCD, with Chinese menu prompts, simple operation, and intuitive display.

1.1 ZLBH-1000Three phase current imbalance measuring instrumentMain functions:

1.1.1 It can track, monitor and record three-phase current 24 hours a day;

1.1.2 Monitor and record zero sequence current;

1.1.3 Monitor and record the imbalance of three-phase current;

1.1.4 Comes with a built-in clock, not lost in case of power failure;

1.1.5 Equipped with battery level detection function, it can display battery level in real time;

1.1.6 Data is stored on a USB flash drive for easy reading;

1.1.7 Backend data management and analysis software, capable of analyzing three-phase current, zero sequence current, and imbalance change curves, and generating printed reports;

1.2 Performance Characteristics

1.2.1 Large screen LCD Chinese display, small size and light weight;

1.2.2 Electronic technology and high-speed digital processors used;

1.2.3 Internal lithium battery power supply:

1.2.4 The backend management software can run on WIN9X/2000/XP/NT operating systems, with powerful software functions, user-friendly interface, and convenient data management;

ZLBH-1000Three phase current imbalance measuring instrumentMain technical indicators

2.1 Power Input: Powered by an internal battery

2.2 Current input: clamp type transformer input 5% -;

(100A, 200A, 500A, 1000A gears can be selected as needed)

2.3 Basic Error of Imbalance Degree

2.4 Operating frequency: 45-55Hz

2.5 Storage interval: 1-99 minutes

2.6 USB storage capacity: record data for no less than 3 years

2.7 Working temperature: -10 ℃ to 50 ℃;

2.8 Power consumption:<5VA;

2.9 Preheating time: 0.5 minutes;

2.10 Weight:<1kg

Electrical measuring instruments