CN2081138U

CN2081138U - Mini-power transformer with metering mechanism for avoiding fraudulent use of electricity

Info

Publication number: CN2081138U
Application number: CN 90204269
Authority: CN
Inventors: 刘福太
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-04-04
Filing date: 1990-04-04
Publication date: 1991-07-17

Abstract

The utility model relates to a low pressure conductive rod which is characterized in that an electrical energy total metering device is reasonably matched with a body of a mini-power transformer, and a current mutual inductor for low pressure measurement is arranged in a transformer oil tank. Seven mini-ceramic sleeves are additionally arranged for leading out and sealing a secondary wire of the mutual inductor for preventing the fraudulent use of electricity. The utility model has the advantages of practicality, economy, safety, prevention of the fraudulent use of electricity, kilowatt-hour meter record, convenient management, etc.

Description

Mini-power transformer with metering mechanism for avoiding fraudulent use of electricity

The utility model relate to a kind of compact electrical transformers structurally do one improve after, have that a cover low-voltage electric energy always measures device and this covering device has anti-electricity-theft performance, and accomplished that transformer and low pressure always measures structurally rationally supporting.

Compact electrical transformers also is called the small distribution transformer, refers in particular to primary voltage 6-10 kilovolt here, the three-phase oil immersion type power transformer of 400 volts of secondary voltages, 20-100 kilovolt-ampere of separate unit capacity.

The small distribution transformer is widely used in township, the power that presses down medium-sized and small enterprises and rural area, the electric consumption on lighting, is one of main controller switching equipment.

Existing compact electrical transformers all is not furnished with electric energy and always measures device when dispatching from the factory, but in actual use, no matter is supplying on the electricity consumption policy or seeing on the actual needs that it is indispensable that low pressure is always measured device; And on existing confession, electricity consumption situation, see that the anti-electricity-theft performance of always measuring device also is indispensable.Reality also is like this, and these distribution transformers are all installed low pressure through local electric industry department and always measured when putting into operation, have and take measures of anti-stealing electricity.But because of the way to manage of various places electric industry department different with technology status, total metering and its measures of anti-stealing electricity are varied, wherein comparatively representational a kind of way, it is sealing transformer secondary insulator, promptly with an iron case secondary insulator is covered and seals, current transformer and kilowatt-hour meter also are equipped with in iron case the inside.Though this way has anti-electricity-theft performance, brought simultaneously inconvenience has been installed, the mounting cost height, the difficulty of moving, safeguarding and copying kilowatt-hour meter, accident etc. easily meets accident.

Task of the present utility model is with total metering of low-pressure side electric energy and transformer body reasonable combination, thereby receives that the small distribution transformer low voltage always measures the economy of device, fail safe and thief-proof electrical reliability.Also give simultaneously operation maintenance, copy kilowatt-hour meter etc. and bring great convenience, watt-hour meter box is suspended in apart from ground about 1.7 meters, and copying kilowatt-hour meter does not again need to have climbed up transformer platform.

Task of the present utility model is finished by following manner;

1. low-voltage electric energy always being measured the main element of device---current transformer (9) moves into the appropriate location in the oil tank of transformer, promptly is installed in the interior position (11) of case of low pressure conducting rod;

On end cap of gasoline tank, set up 7 small-sized insulators (4), Current Transformer Secondary line and low-pressure side neutral point are drawn in fuel tank, use in order to the kilowatt-hour meter wiring;

With a cover (5) that can add lead sealing,, just, anti-electricity-theft with 7 on the end cap small-sized insulators sealings with the sealing of Current Transformer Secondary leading-out terminal;

Adopt to be equipped with,, pilferproof closure and watt-hour meter box to be linked with the pipe of interior dress Current Transformer Secondary line with female fixing mode;

Watt-hour meter box leaves the glass reason and protects the hole of checking meter, and case locks, and it is anti-electricity-theft to add lead sealing.And to have rainproof, anti-dust performance;

Always measure with three single-phase watt-hour meters, so that find fault.Adjust load and analyze the stealing trend.

The utility model embodiment sees accompanying drawing 1-4;

Accompanying drawing 1 is electric tie lines principle

Accompanying drawing 2 is low pressure instrument transformer secondary leading-out terminal and the plan position approach of pilferproof closure on end cap of gasoline tank;

Accompanying drawing 3 is low-voltage current mutual inductor installation site in the oil tank of transformer;

Accompanying drawing 4 is anti-electricity-theft kilsyth basalt box structure;

In the 1-4 accompanying drawing:

1: the oil tank of transformer end cap; 2: high voltage porcelain bushing;

3: the low pressure insulator; 4: instrument transformer secondary line insulator;

5: pilferproof closure; 6: the oil conservator flange;

7: the thermo detector seat; 8: shunting switch;

9: the core-theaded type low-voltage current mutual inductor; 10: the low-voltage coil exit;

11: part in the conducting rod case; 12: mother conducting rod sieve;

13: the instrument transformer secondary connection; 14: pilferproof closure fixedly Luo Shuanke adds lead sealing;

15: instrument transformer secondary lead wires pipe; 16: the glass reason is protected the hole of checking meter;

17: the case lock; 18: junction pipe, interior dress metering secondary line;

19: thief-proof lead sealing sieve bolt;

Claims

The compact electrical transformers that 1, anti-electricity-theft performance metering device is arranged; It is formed by the transformer body with by the metering device of anti-electricity-theft performance, and its principal character is that low pressure is always measured Current Transformer and is installed on low pressure conducting rod in the oil tank of transformer; 7 small-sized insulators that instrument transformer secondary lead-out wire is set up through end cap of gasoline tank are drawn and are can covering anti-electricity-theft.