Electrical equipment in operation refers to all, part or once-operated equipment with voltage.
One is in front of the safety rules and is often tested.
What are the differences between various safety distances in power safety regulations?
1, the safety distance of the equipment without power failure takes into account certain safety margin and accidents, not only from the perspective of discharge distance, but also from the minimum safety distance.
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How to understand the "safe distance of distribution equipment without power failure" and "safe distance of operators in live parts of distribution equipment" in safety regulations?
The specified values of the safety distance of equipment without power outage are as follows: 10kV and below 0.7m, 35kV- 1.0m,10kv-1.5m, 220kV-3.0m, 500kV-5.0m .. If the distance between the staff and the live part can keep the above value, the live equipment is allowed to work without power failure, and there is no mesh fence in the iron gate behind the handcart switch cabinet. After opening the iron gate, it should also be carried out at a specified distance. The safety distance is not simply considered from the discharge distance, nor is it the "minimum safety distance", but a value determined after considering certain accidents and safety margins.
The safe distance between the normal working range of the staff and the live equipment takes into account the maximum space position that the staff may work in normal work and the safe distance that the live equipment must keep. The specified values are as follows: 10kV and below 0.4m, 35kV-0.6m,110kv-1.5m, 220kV-3.0m, 500kV-5.0m If the safe distance between workers and live conductors during normal work is less than the above values, When the safety distance is greater than the above value and less than the first value, it is allowed to work without power failure only after a solid and reliable barrier is installed between the working place and the live part. However, if the live conductor is behind or on both sides of the maintenance personnel, even if it is greater than the first safe distance, the live equipment should be powered off.
Power safety test questions?
First, multiple-choice questions:
1. Who must wear safety helmet when entering the following places: (a)
A, high voltage distribution room B, control room C, maintenance team office D, non-production area
2. In order to prevent five kinds of electrical misoperation accidents, it is required that all high-voltage electrical equipment that may cause electrical misoperation should be equipped with misoperation prevention devices. In the "Five Preventions" function, except which of the following prompt devices can be used, all other "Four Preventions" should use mandatory devices: (d)
A, to prevent the load pull (close) isolating switch.
B, prevent live hanging (close) grounding wire (grounding switch)
C, prevent using grounding wire (grounding switch) to pull the circuit breaker.
D, to prevent false points (false) circuit breaker
E, prevent straying into the charged interval.
3, thunderstorm weather, need to patrol outdoor high-voltage equipment, should be: (a)
A, wear insulating boots, and shall not be near the lightning arrester and lightning rod;
B, in the absence of any security measures, can patrol alone;
C. Wear insulating boots and be close to any equipment;
D, wear insulating boots, but can be close to the lightning arrester and lightning rod.
4. The production enterprise shall conduct an examination of safety production rules and regulations for workshop leaders, production department leaders and professional and technical personnel every few years: (a)
A, one year b, two years c, 2-3 years d, 1-2 years
5. The personnel on duty and those off duty who are allowed to patrol the high-voltage equipment with the approval of the enterprise leaders, when patrolling the high-voltage equipment: (a)
A, no other work, no removal or crossing any obstacles.
B, can carry out other work.
C, can cross obstacles for inspection.
D, there is no specific provision.
6. The "three systems" in the "two votes three systems" refers to: (a)
A, succession system, inspection tour system, equipment test rotation system on a regular basis;
B, succession system, succession system, inspection tour system;
C. Pre-shift meeting system, post-shift meeting system and patrol inspection system;
D, equipment operation system, equipment maintenance system, equipment periodic test rotation system.
7. What exams must new production personnel pass before they can enter the production site: (d)
A, passed the team assessment;
B, pass the workshop assessment;
C, through the factory (bureau, company) assessment;
D, factory (bureau, company), workshop, team three-level safety education, "electric safety regulations" examination.
8. For temporary workers, the following statement is correct: (a)
1. Temporary workers' safety management, accident statistics, assessment and distribution of safety protection articles are treated equally with regular employees;
B, the safety management of temporary workers is the same as that of regular workers, but it is not counted without assessment;
C, temporary workers engaged in production work required for the distribution of safety protection articles is not the same as formal workers;
D The accident statistics and assessment of temporary workers are the same as those of regular workers, but the distribution of safety protection articles required for production work is different from that of regular workers.
Second, multiple-choice questions (at least one answer is correct):
1. High-voltage electrical equipment refers to: (A, C, D)
A, the equipment voltage to ground is above 250V v.
B, equipment voltage to ground is 250 volts and below.
C, 6- 10 kv electrical equipment
D, 1 10KV electrical equipment
2. When working on electrical equipment, the organizational measures to ensure safety are: (A, B, C, D)
First, the working ticket system
B. Work permit system
C, work ......
How to understand the voltage classification of high and low voltage electrical equipment in the new and old safety regulations?
This voltage is a line voltage, not a phase voltage relative to ground.
What is the meaning of "the safe distance between the normal working range of the staff and the live part of the equipment" in Table 4- 1 of the Electric Power Safety Regulations?
This "normal activity range" refers to the distance that workers must keep from live equipment during normal activities: 10KV and below is 0.4M, 35KV is 0.6M, 1 10KV, 220KV is 1.5M, and 550KV is 5m; However, the safety distance of equipment without power failure takes into account certain safety margin and unexpected circumstances, not only the discharge distance, but also the minimum safety distance.
What are the provisions on electrical safety distance in safety regulations?
Electrical safety distance
In order to prevent the human body from touching or getting too close to the charged body, or objects such as vehicles from colliding with the charged body, and to avoid various short circuits, fires and explosions, a certain distance must be kept between the human body and the charged body, between the charged body and the ground, between the charged body and the charged body, and between the charged body and other objects and facilities. This distance is called electrical safety distance, or spacing for short.
The distance depends on the voltage, equipment type and installation method.
Spacing can be roughly divided into four types: spacing of various lines; Spacing of power transformation and distribution equipment; The spacing of all kinds of electrical equipment; Distance during inspection and maintenance.
The spacing between various lines, power transformation and distribution equipment and various electrical equipment is specified clearly and in detail in the electric power design specification and related materials.
Please refer to wenku.baidu/...7. for details.
What are the basic requirements for electrical work in safety regulations?
Non-electricians are forbidden to engage in electrical operations.
Correct use of insulating shoes, gloves and other protective equipment.
Safety regulations for electricity consumption in flammable and explosive areas, wet areas and closed containers.
In the new code, the voltage to the ground is increased from 250V to 1000V, which is different from the old safety code as the division of high-voltage equipment and low-voltage equipment.
Old safety regulations, high voltage: equipment to ground voltage above 250V V, low voltage: equipment to ground voltage below 250V V.
New safety regulations, high voltage: equipment ground voltage 1000V or above, low voltage: equipment ground voltage1000 v or below.
What are the power outages of electrical equipment in the safety regulations?
Complete treatment of electrical equipment, power failure, setting device and safety status, take the situation that the zero line of the phase line is disconnected, cut off the root line safely, dare to ensure safety, and lock it if necessary.