PEC

1. Automatically complete second pressure drop of three-phase three wire and three-phase f-
　 our wire voltage transformer through wireless ways, not like normal way that needs to p-
　 lace a long voltage measure line between tester and far-end of tested device, so that a-
　 void unnecessary short circuit failure caused by long line that is the problem should be
　 avoided by transformer. Moreover, sometimes this line need to cross roads, it will be d-
　 amaged if there is nobody guarding it. Wireless second pressure drop device avoids this
　 situation effectively and it is able to calculate rate ratio, angle error and integrati-
　 ve error of three phase automatically.
2. Able to check automatically and save test errors caused by testing wire under kinds of
　 wire connection, and calibrate them in later test automatically.
3. This device has a special design that is software calibration function.It can realize a-
　 ccuracy calibration no need of hardware adjustment,also can be used in field test in all
　 levels of electricity test and research department.
4. This tester has inner chargeable battery units with large capacity. When in outside pla-
　 ces without 220V AC electric source, the inner battery unit is able to provide electric-
　 ity for this device. The battery itself is charged by its inside quick speed charger.
5. The left electricity will be showed in percentages,rather than just giving a simple alarm.
6. Large screen, high-brightness liquid crystal display,　English menu and operation instru-
　 ction to realize friendly communication with machine. Touchable key-press makes operation
　 easier. The wide liquid crystal display has brightness adjustment and it is able to be r-
　 egulated according to different seasons.
7. Users are able to print the test data any time through micro-printer.
8. This device has saving function, able to save 200 units of test data.

1. Use environment
　 ambient temperature: ：-10℃～ 40℃
　 relative humidity： ≤80%

2、measurement accuracy:
　 The measurement accuracy of this device is ±1%.
　 rate ratio：Δf =±（1%×f+1%×δ+0.01）（%）
　 angle accuracy：Δδ=± (1%×f+1%×δ+0.1)（’）
　 electric conductance： G=± (1%×G+0.01) mS
　 electric susceptance： δ=± (1%×δ+0.01)mS
　 load： S=± (1%×S+0.1)VA
　 resistor： R=± (1%×R+0.1)Ω
　 electric reactance： X=± (1%×X+0.1)Ω

3、charging source：AC 176V~264V，frequency 45-55Hz

4. Checking scope and resolution ratio of device:

5. Intrinsic Error
　 ratio ＜0.03%
　 Angle accuracy＜±1′
　 Electric conductance：±（1% reading of electric conductance +1% reading of electric
　　　 susceptance + the last number）mS
　 Electric susceptance：±（1% reading of electric conductance +1% reading of electric
　　　 susceptance + the last number）mS

6. Insulation
　 The insulated resistor of voltage and current input ends against the cover ≥100MΩ
　 The frequency between input electric source end and the cover is 2KV (valid), being
tested for 1 minute.

7. Working time of battery: more then 6 hours in full charged.
8. Cubage: main machine 40×36×14cm extension machine: 32×28×14cm
9. Weight: main machine 5kg extension machine: 3kg