(1) Can perform electric operation and manual operation;

(2) The circuit breaker mechanical characteristics tester is suitable for testing the mechanical dynamic characteristics of various high-voltage circuit breakers within 500kV voltage level;

(3) Can measure actual stroke and custom stroke;

(4) Can realize single close, single open, close-open, reclose, and reopen operations of circuit breakers;

(5) Convenient wiring and simple operation. Only one close (open) action is needed to obtain all data of close (open). It can choose to save 50 sets of data, provide later query and upload to computer for permanent storage, and also can view and print all data and motion curves on site;

(6) Uses Chinese prompts and operates in a man-machine dialogue mode;

(7) Accurate data, strong anti-interference, small size, light weight, and beautiful appearance;

(8) Built-in clock circuit can display current year, month, day, hour, minute, and second. Even if power is off, it can automatically save setting data and test data;

(9) Built-in delay protection function. After the circuit breaker operates, it can automatically cut off the action power supply, well protecting the circuit breaker equipment and the high-voltage switch tester;

(10) The instrument has built-in DC power supply, selectable range: 30-230V/10A, without the voltage drop at the moment of output of conventional rectifier power supply, making the test of switch action voltage very accurate.

(11) Can dynamically analyze the relationship between stroke and speed of the circuit breaker every 1ms;

(12) Can be configured with upload software to realize computer archiving, online viewing, and printing.

Technical Indicators of Circuit Breaker (High-Voltage Switch) Mechanical Characteristics Tester

Environmental group: belongs to Group III instruments in GB6587.1-1986 "General Outline of Environmental Tests for Electronic Measuring Instruments".

Type: Portable                        Packaging: Aluminum alloy case

Dimensions and weight:

Main unit:            440×300×150(mm)     5 (kg)

Accessories:            440×300× 80(mm)     3 (kg)

Working power supply: AC220V ±10%            Frequency: 50Hz ±5%

Ambient temperature: -10°C~40°C              Relative humidity: ≤85%

Insulation resistance: ≤2MΩ                    

Dielectric strength: The power input line to the casing can withstand a withstand voltage test of 1.5kV for 1 minute.

Time test range: 1~499.9ms  Resolution: 0.01ms    Accuracy ≤0.1% 

Speed test range: 15m/s      Resolution: 0.01m/s    Accuracy ±1% 

Stroke test range: unlimited       Resolution: 0.01mm    Accuracy ±1% 

DC power supply selection range: 25-265V/10A Resolution: 1V:  Accuracy ≤±1%

IV. Definition of Terms

1. Closing/Opening time:

The time interval from the instant the closing (opening) command is received to the instant when all pole contacts touch (separate).

2. Closing/Opening simultaneity:

The maximum time difference between the instants of contact touching (separating) among the breaks.

3. Bounce time:

During the closing (opening) operation of the switch, the time from the first contact (separation) of the moving and stationary contacts to the final stable contact (separation).

4. Operating time: (Contact action time)

The time from the instant the closing (opening) command is received to the instant the contacts just start to move.

5. Bounce count:

The number of times the moving and stationary contacts separate (close) during the opening (closing) operation of the switch.

6. Bounce amplitude:

The maximum rebound value of the moving contact during its movement.

7. Stroke:

The distance from the initial position of the moving contact to any position during opening and closing operations.

8. Open gap:

The total gap between the contacts of one pole of the switch or any connected conductive parts when in the open position.

9. Over-travel:

The distance the moving contact continues to move after the contacts touch during closing operation.

10. Excess travel:

The difference between the maximum stroke during the movement of the moving contact and the stroke after stabilization during opening and closing operations.

11. Just closing (opening) speed:

The speed of the moving contact at the instant of touching (separating) with the stationary contact during closing (opening) operation.

12. Average speed: The ratio of the stroke to the time during the entire movement of the moving contact in the closing (opening) operation.

13. Arcing time (metal short-circuit time):

In a close-open operation, the time interval from the instant when all pole contacts touch to the instant when the arcing contacts of all poles separate in the subsequent opening operation.

Panel Structure of Circuit Breaker (High-Voltage Switch) Mechanical Characteristics Tester

1. Panel structure (Figure 1)

                                Figure 1

VI. Connection of Break Contacts

6.1 Connection of break contacts

This instrument can measure the mechanical characteristic parameters of six breaks simultaneously.

(1) Single-break wiring

Connect one end of the switch (three contacts) correspondingly to the a, b, c break signal input terminals of the instrument, and the other end arbitrarily to the common terminal (break signal input) of the instrument (Figure 2)

             

(2) Double-break wiring

Connect one end of the switch (six contacts) correspondingly to the a-c' break signal input terminals of the instrument, and the other end arbitrarily to the common terminal (break signal input) of the instrument (Figure 3)