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Application
This series of electric distribution equipment can be used in the coal mine with explosive dangerous gas(methane mixture), controlled by three phases of AC power supply system with ungrounde neutrals under rated voltage 10KV、6KV，frequency 50Hz，rated current 50A-630A, so to protect, measure and direct start high voltage motor.
Features
Adopting vacuum circuit breaker, voltage (current) transformer, lighting conductor integrally mounted, having features of reasonable features, needless extra orbit, strong interconnectivity, easy installation and maintenance.
Adopting 32-bit microprocessor of intelligent protector with features of high protection precision and quick response and functions of ground connection, under voltage, over voltage unbalanced three-phase, overload short-circuit, phase failure, insulation supervision, circuit interlocked.
Display the present voltage, current, power of grid and electrical insulation resistance.
Adopting RS-485 or CAN bus interface，which can communicate with monitoring system of upper computer and possess the functions of “four remote control”，truly realizing non-man control.
Have software and hard ware self-check function, if any problem, the system will display relevant error information.
Quick-open door design is equipped with reliable machinery and electric interlock to ensure safety and reliability.
Distribution equipment can be widely used in inlet wire and contact of the large capacity transformer room, also used to switch on or off large-load places.
Distribution device can be used alone or to be connected with others; both soft and hard connection are proper for the latter.
Main technical parameters
|
Type spec. |
QJGZ(1)-□/3.3 |
QJGZ(1)-□/6 |
QJGZ(1)-□/10 |
Cable O.D. (Φmm) |
Outline dimension L×W×H (mm) |
Weight (kg) |
|
|
Main circuit |
Control circuit |
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Rated voltage (kV) |
3.3 |
6 |
10 |
42~78 |
9~23 |
1220 × 1366 × 1238 |
750 （690） |
|
Rated current (A) |
50,100,160 200,250,300 400,500,630 |
50,100,160 200,250,300 400,500,630 |
50,100,160 200,250,300 400,500,630 |
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|
Rated breaking current of short circuit(kA) |
8Ie |
8Ie |
8Ie |
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|
Rated connection current of short circuit |
10Ie |
10Ie |
10Ie |
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Rated tolerated current of peak value(kA) |
31.5 |
31.5 |
31.5 |
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Duration of short circuit (S) |
2 |
2 |
2 |
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Mechanic life（PCS） |
1000000 |
1000000 |
1000000 |
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