Technical index
Type wq-dqf1520wq-dqfk1520
Specificationsdn1520dn1520
Working voltagedirect current 2.76v direct current 2.76v
Working current_50ma_80ma
Internal resistance1616
action time11s4s
Medium temperature_90up to110_90up to 110
Working pressure_1.6mpa _1.6mpa
Working lifeª2 million timesª5 million times
Material usedPolycarbonate case ect.
Used for enterprises, residential areas, with current 3 x 220/380V. It is capable of prepaid and control overload. Solve default energy charge, prevent pilferage effectively. Control and debug the electric network running. Remote control and IC card prepayment.
Main usages:
Designed for timesharing electricity metering of new or reconstructed single-phase users. With prepayment function, it is particularly suitable to solve payment-collecting difficulties in residential area, organization, factories, mines and schools excite is preferable in promoting the management level at demand side, inducting the users to better power consumption style to improve power efficiency and electric sources collocation.
Main Functions
1.Both-way electric energy metering. Provides precise positive-negative active energy metering and one-way accumulating. Used for power metering and advance purchase of AC single-phase current rated.
2.Advance purchase quantity, preset maximum load-limit and IC card password. IC card transfers data and realizes data including total consumption, remaining quantity, accumulated quantity and total purchases etc.)backward reading.
3.Storage of leave-factory serial number, meter constants, initial data and the user's name and address etc..
4.Alarm and switch off when overload. Alarm at low remaining power to remind user of timely purchasing.
Main Characteristics:
1.High accuracy and import special metering chip. High accuracy, sensitivity and reliability, wide overload endurance, low power consumption, small volume and light in weight; easy installation, convenient auto-control and function expanding.
2.Long service life. With SMT technology and world famous, long-life components employed, its accuracy is not affected by frequency, temperature, voltage and higher order harmonics. Random installation location. No adjustment is needed if it leaves the factory as complete machine. Checkout period can be extended. Hence the workload of Watt-hour Meter testing and checking-out of electric departments is considerably reduced. Obviously better reliability than its similar.
3.Stable operation. Better stability for its wide range working voltage.
4.LED display, bright and clear prevent counter data from Losing at any times.
5.Single-phase,3-phase and multi-functional prepayment Watt-hour Meter can share a single electricity supply system.
6.With meter reading card and a portable computer, once about 1500 meters can be read.
Technical requirements:
1. Accuracy Class: B/A, the measuring accuracy class equal to electromechanical gas meterf+s
2.Automatic data memory ,keeping time fª10years, the service life of IC card >10 million times
3.Non-touch sampling , the accuracy class of controller >0.1%
4.Working voltage: 3V/4.5V/6V power consumption: Solid currentf_10»A
5.Power source: With battery outside, users could exchange freely
6.Temperature range: -10f¦-40f¦,relative humidity not exceed 93%RH·+20f¦·¼
7.Maximum working pressure: 30KPa
8.Gas pressure loss:<250a(infuse pressure 1KPa,gas meter total pressure loss)
9.Controller simultaneous measure accuracy f_0.1%H
Multifunctional microcomputer controller
The multifunctional microcomputer controller is the intelligence type equipment researched and developed by our company independently. It can monitor line current, voltage. While the high (low) voltage controlling box has the fault of on switch over-, over current, over voltage and line fault etc on working condition, it can automatically delayed off switch control, and automatically delayed switch on according to pre-settlement. This product can make high voltage controlling box realize part functions of minitype transformer substation.
1). Normal working current point: when reach or surpass the setting current point (means the second current of current inductance implement, the high voltage corresponding circuit should calculate according to CT ratio changing), it takes delayed over current cut off. Setting scope is 4-7A, real display is 4-7. It changes 1A while setting.
2) Fast cut off current point: when reach or surpass the setting current point (the second current of CT), that is the implementation of Quick Break Trip Delay. Setting scope is normal working current point +1-30A. Real display is 5-30. It changes to 1A while set every time.
3) Reclosing (Peak current) delayed period: During this period, over current is ignored. However, when reach settled quick break current point, which will undertake Quick Break Delayed reclosing. The Setting scope is 1-10s; real display is 1-10, change to 1s each time.
4) Quick break delayed: When over- current reach or surpass the setting period continuously which will trip soon . The setting scope is 0-2s; real display is 00-20, change to 1s each time.
