(1) Overload
The household electricity load is too large, causing overload and causing the fuse to blow. This situation is especially likely to occur when using air conditioners, electric heaters or adding other high-power appliances.
(2) Poor contact
In some households, although the fuse is selected reasonably, the load is not too large, but when the air conditioner, electric heater, rice cooker and other high-power household appliances are used, they will "trip". The reason may be that when the fuse is installed or replaced, the fuse is in poor contact with the plug screw, which causes ignition and heat generation, and oxidizes the screw that fixes the fuse on the porcelain plug and the switch blade.
(3) Short circuit
If the fuse is replaced and "tripped" as soon as it is switched on, it may be a short circuit. The first is a short circuit. Secondly, the load is short-circuited. The plugs of commonly used high-power electrical appliances such as electric kettles and rice cookers, and commonly used mobile electrical appliances, as well as inferior electrical appliances, are prone to short-circuit failures.
(4) Pulse
When the circuit is started or the power supply is unstable, a large instantaneous current causes the fuse to break; in addition, the screw is not tightened when the fuse is installed, or the fuse is damaged, which can also cause the fuse to blow.
Measures to prevent the fuse from blowing1. It is not possible to use a fuse that is too thin. If a thin fuse is used, the normal current passing through is also easy to blow, causing unnecessary power outages;
2. It is necessary to select and use a suitable fuse. The melting current of the fuse is usually 1.5 to 2.0 times of the rated current. For example, if the total power of each electrical appliance exceeds 1100 watts in the normal household use, choose a 5 ampere fuse, and use a No. 20 fuse with a diameter of 0.98 mm. When the current exceeds 7.5 amperes to 10 amperes, the fuse will be Automatic fuse to achieve the purpose of protection;
3. If the fuse selected and used meets the specifications and the fuse is often blown, it indicates that there is a problem with the electrical circuit and electrical equipment. You should ask an electrician to find the cause and remove the hidden danger in time. Do not replace the thick fuse at will and simply replace it with copper wire, iron wire, etc.
Power Meter is a monitoring and testing instrument which determines the power consumption of a connected appliance and the cost of the electricity consumed.
Installing the batteries
Install 3.6V rechargeable Battcrics(NI-MH) . The purpose of the batteries is to store the total electricity and mcinory setting.
Resetting
If an abnormal display appears or the buttons produce no response, the instrument must be reset. To do this,press the RESET button.
Display Mode
Entire LCD can be displayed for about 1 minute and then it automatically gets into Model. To transfer from one mode to the other, press the FUNCTION button.
Mode 1: Time/Watt/Cost Display Display duration(how long) this device connect to power source.LCD on first line shows 0:00 with first two figures mean minutcs (2 figures will occur while occur at 10 min) and the rest shows seconds. After 60mins, it displays 0:00 again with first two numbers meas hour(2 figures will occur at 10hours) and the rest shows minutes. The rest can be done in the same manner which means after 24 hours, it will rc-caculatc. LCD on second line displays current power which ranges in 0.0W~9999W. LCD on third line displays the current electricity costs which ranges in 0.0cost~9999cost. It will keep on O.OOcost before setting rate without other figures.
Mode 2: l ime/Cumulative electrical quantity Display Display duration(how long) this device connect to power source.
LCD on first line shows 0:00 with first two figures mean minutes(2 figures will occur while occur at 10 min) and the rest shows seconds. After 60mins, it displays 0:0() again with first two numbers meas hour(2 figures will occur at 10hours)and the rest shows minutes. The rest can be done in the same manner which means after 24 hours, it will re-caculate. LCD on second line displays current cumulative electrical quantity which ranges in 0.000K WH 〜 9999KWII without other figures. LCD on third line displays''DAY''- "1 "will be showed on numerical part(thc other three figures will be showed at carry) which means it has cumulated electrical quantity for 24hours(one day). The rest can be done in the same manner untial the maximal cumulative time of 9999 days.
Mode 3: Time/Voltage/Frequency Display LCD on first line displays the same as Mode 1 dones. LCD on second line displays current voltage supply (v) which ranges in 0.0V~9999V .LCD on third line displays current frequency (HZ) which ranges in 0.0HZ~9999HZ without other figures.
Mode 4: Time/Current/Power Factor Display LCD on first line displays the same as Mode 1 dones.
LCD on second line displays load current which ranges in 0.0000A~9999A. LCD on third line displays current power factor which ranges in 0.00PF 〜 1 .OOPF without other figures.
Mode 5:Time/Minimum Power Display LCD on first line displays the same as Mode 1 clones. LCD on second line displays the miniinum power which ranges in 0.0W~9999W. LCD on third line displays character of "Lo" without other figures.
Mode 6: I,ime/Maximal Power Display LCD on first line displays the same as Mode 1 dones. LCD on second line displays the maximal power which ranges in 0.0W~9999W. LCD on third line displays character of "Hi" without other figures.
Mode 7: Time/Price Display LCD on first line displays the same as Mode 1 dones. LCD on third line
displays the cost which ranges in O.OOCOST/KWH 〜 99.99COST/KWH without
other figures.
Overload Display: When the power socket connects the load over 3680W, LCD on second line
displays the"O VER LOAD" with booming noise to warn the users,( 1918935, 60470643,
60469303,selectable choice)
Supplemental informations:
1: Except tt OVERLOAD , ' interface, LCD on first line display time in repitition within 24hours.
2: LCD on first line, second line or third
line described in this intruction take section according to two black
lines on LCD screen. Here it added fbr clarified purpose.
3. Mode 7 will directly occur while press down button "cost".
4. [UP"&''Down" are in no function under un-setting mode.
Backlight Mode:
Connect to AC power,backlight im mediately light,if not press any button,backlight will went off in 15 seconds.
When press any of the buttonsbacklight
start light again. (Backlight only light when it connect to AC
power,backlight cannot light if use battery)
Setting Mode
1. Electricity price setting
After keeping COST button pressed lasting
more than 3 seconds(LCD on third line display system defaults price, eg
O.OOCOST/KWH ),the rendered content begins moving up and down which
means that the device has entered the setting mode. Then press FUNCTION
button to change selection and press UP/DOWN to set what you want. (On
pressing once, the figure after domical point will increase or decrease
accordingly. On pressing and hold-on, figures after demical point will
increase or decrease slowly in 2 seconds while figures change quickly
when hold-on time exceeds 2 seconds. When hold-on time reaches 10
seconds or more, the figures after demical point will stop while the
figures before demical point begin to increasing or decreasing.) After
that, press FUNCTION fbr swithing, then press [UP'nd "DOWN" button again
to set value which ranges in OO.OOCOST/KWH 〜 99.99COST/KWH. After
setting all above, press COST to return to Mode7 or it will
automatically return to Mode7 without any pressing after setting with data storage.
Power Meter Double Rates, Power Meter Two Rates, Cost Rate Socket, Power Meter Cost Rate, Energy Meter Cost Rate, Cost Socket, Cost Plug
NINGBO COWELL ELECTRONICS & TECHNOLOGY CO., LTD , https://www.cowellsockets.com