II.Instrument Characteristics

1. Suitable for domestic and foreign production of SF6 switch, GIS combination electrical appliances, vacuum switch, oil switch, vacuum contactor, special circuit breaker (train circuit breaker). At the same time, 12 metal contact fractures, 6 main fractures and 6 auxiliary fractures can be measured. The circuit breaker is operated once, and the data and waveform such as time, bounce number and time, speed, coil current and coil resistance are obtained. With energy storage, automatic and manual low jump test, circuit breaker life test and(lock power supply and dry contact control optional) and other functions. Equipped with high speed thermal printer, convenient to print test data on site.

2.7 inch color screen, operating under the sun is clearly visible. Menu operation, quick test interface, one-key operation, support Chinese and English input. The 12-channel fracture status is displayed in Chinese. The time, stroke, speed and waveform are displayed on the same screen. Analyze the average velocity of the specified segment and mark it on the stroke curve for easy viewing.

3.machine integrated operation power supply, no site secondary power, easy to use. Can provide DC20 ~ 270V adjustable power supply, current 20A. Short circuit protection function. In case of short circuit, 1ms will stop the voltage and current output and emit a beep to prompt the operator to check the circuit. Unique double circuit power supply design, such as closing or breaking control circuit in one damage, with the other can also be tested.

4.equipped with linear sensor, 360 degrees without dead Angle rotation sensor, with special fixed multifunctional joint, installation is very convenient, simple. The length of the 30-1000mm linear sensor can be set arbitrarily. It only needs to be equipped with the sensor, and the instrument does not need to be returned to the factory to change the program.

5.the host can store 100 groups of test data, real-time clock in the machine, easy to archive.

6.Equipped with U disk interface and R232 interface, data saved to U disk, uploaded to the computer for analysis, saving, printing, R232 interface can be connected to the computer online operation (optional function).

7. The internal anti-interference circuit can be used reliably in 500KV substation.

III. Main Technic Parameters

1. Time measurement:

12 natural switching (closing) time

The opening (closing) phase is not at the same time

The difference between different periods of switching (closing)

Closing (opening) Bouncing time (number of bounces)

Internal trigger test range: 1ms ~ 20000ms, resolution: 0.01ms,

External trigger test range: 1ms ~ 200000ms,

Resolution within 999ms: 0.01ms,1000-9999ms: 0.1ms, and over 10000ms: 1ms.

Accuracy within 200ms: 0.05%± 0.1ms

2. velocity measurement : instant separating (instant closing) velocity

Appointed time slot( stroke segment or angle segment) average

velocity

3.velocity measurement range: 0.1mm sensor 0.01～20.00m/s，

                          345°angle sensor 1 cycle/ 0.01°

4.Travel measurement: Travel of moving contact (travel)

Contact stroke (open distance)

Over travel

Overshoot or rebound stroke

5.Measuring range: linear sensor: 50mm, measuring range: 0-50mm, resolution :0.1mm.

Optional 100-1000mm linear sensor of any length.

Encoder: 345° Rotate sensor, measurement

range: 0-1000mm, resolution :0.1о.

6. Current resistance range: the maximum current 30 A, resolution: 0.01 A, 1000 Ω resistance, resolution: 0.01 Ω.

7. Instrument power supply: AC 220V ± 10%; 50 hz plus or minus 10%

8. Dc power output: continuously adjustable DC20 ~ 270V, DC220V≤20A (short time), Power: 4400W.

9. External trigger voltage: AC/DC10-300V, current ≤120A

10. disconnecting switch measurement range

(1) Voltage output: DC20～270V(adjustable)

(2) Current output time: 0.01~10 s (settable)

(3) Fracture signal maximum acquisition time: 10s

(4) Measurable fracture closing, separation time, three-phase a synchronism , bounce time and frequency .

11. mainframe volume : 360×260×170mm

12. operating environment: -20℃~+50℃

13. relative humidity: ≤90%

IV. Term Definition

1.Three-phase synchronism: refers to the maximum & minimum differentials of on-off three-phase separation (closing) switch.

2.Same phase asynchronies : refers to 6 fractures or more switches, the time difference of separating (closing) brake to same phase fracture

3.Bounce time: refers to the accumulative time values, which is the interval from first contacting to completely contacting, of all contacts while in progress of closing, separating (bounce) brake when switch’s moving & static contacts .

4.Opening time: refers to the interval from separating brake dropping out with electrification to every polar arc contact separating, where the breaker is in closed position.

5.Closing time: refers to the interval from closing circuit with electrification to every polar arc contact touching, where the breaker is in open position.

6. Reclosing time: in the cyclic process of reclosing, it’s the interval from opening to each polar contacts closing together.

7. Instant separating (closing) velocity: refers to within some appointed time of opening/ closing moving contact and static contact, or average velocity of a certain appointed stroke. Take 10ms for instance, to separating brake ,it’s average velocity to separate brake within 10ms after separating. To closing brake, it’s average velocity to close brake within 10ms before closing.

8.Opening range: refers to the stroke of switch from divided state to instant touch of moving contact with static contact.

9.The maximum velocity of opening (closing)switch: refers to the maximum instantaneous speed of opening (closing) switch, generally speaking, this value shall appear in this stroke or point, which is analyzed from velocity and stroke curve, while switch just opening or closing.

10. Average velocity of opening (closing): refers to the ratio of stroke to time , where the switch moving contact exists in whole action.