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Power Industry SOLUTIONS

Application in petrochemical industry

Application of Kaiyan machinery inPower Industry

According to the "five prevention" specifications and technical requirements of electric power, the mechanical interlocking system is designed and equipped with electric five prevention mechanical lock. Each step of operation can be realized through key transmission to ensure that the electric equipment operates according to the preset safety procedures. The product is made of stainless steel without spring marbles. The lock cylinder key can ensure 1 million rotation and insertion operations. It is a safe mechanical interlocking product certified by CE.

It has been widely used in Huaneng, Datang, Huadian, Guodian and CPI power generation groups and nuclear power plants.
KAIYAN MACHINERY
Power five prevention system (FTS)

Power five prevention system is used for bus grounding maintenance

Auxiliary power 10kV / 6kV bus maintenance interlocking will form interlocking between incoming cabinet, liaison cabinet, transformer feeder cabinet and bus grounding knife

Only after the incoming cabinet, liaison cabinet and transformer feeder cabinet are disconnected, the key can be released from the exchange box to unlock the bus ground knife lock, so as to ensure the safety of maintenance personnel.

Interlocking application of electric power five prevention system in electrostatic precipitator

If you directly enter the manhole door of the electrostatic precipitator room without disconnecting the 400V power switch or grounding discharge, there will be a risk of entering the charged interval by mistake. If a set of mechanical interlocking is installed on the 400V switch, rectifier transformer ground knife and manhole door according to the normative logic, the problem of entering the charged interval by mistake in the electrostatic precipitator room can be well solved.

Description of interlocking scheme:

1. When each 400V high-frequency power switch is operated to the power-off position, the keys A1, A2, A3 and A4 in each latch lock can be pulled out, and the locking switch is in the power-off position;

2. Insert the keys Al, A2, A3 and A4 into each grounding switch to unlock the grounding knife. When operating the grounding knife to the closing position, turn all keys B on BL2 lock to lock the grounding knife in the closing position;

3. Use the keys BL, B3, B5 and 87 to open the doors of each knife switch box and start the maintenance work;

4. When it is necessary to enter the dust collector for maintenance, insert all keys 82, 84, 86 and B8 into the exchange box, exchange key C, and then open the manhole door to start maintenance.

Interlocking application of power five prevention system in insulation test

Many power plants are equipped with 6kV switchgear, including center mounted or floor mounted trolley switches (removable). The power inspection and insulation measurement after equipment maintenance and before power transmission bring many dangers and inconveniences to operators, and there are many potential safety hazards.

Description of interlocking scheme:

1. Pull the 6kV circuit breaker to the test position, rotate and pull out the key a on the pile lock, and the 6kV circuit breaker will be locked in the test position.

2. Use key a to open the door lock on the 6kV insulation measuring small door for insulation measuring operation.

3. Only when the 6kV insulation door is closed can key a be pulled out and unlocked to the 6kV circuit breaker to restore power transmission

Interlocking application of power five prevention system in maintenance of dry type transformer

When the dry-type transformer is overhauled, if the high and low voltage side switches of the dry-type transformer are not disconnected, it will be very easy to enter the live interval by mistake. This potential safety hazard can be well solved by mechanical interlocking.

Description of interlocking scheme:

1. Disconnect the 400V circuit breaker, pull it to the test position, rotate and pull out the key C1 of the mechanical lock on the 400V circuit breaker, and the 400V circuit breaker will be locked in the disconnected state.

2. Disconnect the 6kV circuit breaker, pull it to the test position, rotate and pull out the key C2 of the mechanical lock on the 6kV circuit breaker, and the 6kV circuit breaker will be locked in the disconnected state.

3. Insert the above C1 and C2 keys into the two for two key exchange box to exchange the keys C3 and C4.
應用案例

Mechanical five proof lock

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Mechanical program lock

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Mechanical key interlock

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Safety mechanical interlock

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Mechanical anti misoperation locking

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