How to draw up a PPR schedule for electrical equipment?

How to draw up an annual schedule for the maintenance of electrical equipment? I will try to answer this question in detail in today's post.

It's no secret that the main document by which the repair of electrical equipment is carried out is the annual schedule of preventive maintenance of electrical equipment, on the basis of which the need for repair personnel, materials, spare parts, and components is determined. It includes each unit subject to major and current repairs of electrical equipment.

To draw up an annual preventive maintenance schedule (PPR schedule) for electrical equipment, we need standards for the frequency of equipment repairs. These data can be found in the manufacturer's passport data for electrical equipment, if the plant specifically regulates this, or use the reference book "Maintenance and repair system power equipment". I use the reference book of 2008, therefore, I will refer to this source further.

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So. Your household has a certain amount of power equipment. All this equipment must be included in the PPR schedule. But first a little general information what is the annual PPR schedule.

Column 1 indicates the name of the equipment, as a rule, brief and understandable information about the equipment, for example, name and type, power, manufacturer, etc. Column 2 - number according to the scheme (stock number). I often use numbers from electrical single-line diagrams or from technological ones. Columns 3-5 indicate the resource standards between major repairs and current ones. Columns 6-10 indicate the dates of the last capital and current repairs. In columns 11-22, each of which corresponds to one month, symbol indicate the type of planned repair: K - capital, T - current. In columns 23 and 24, respectively, the annual downtime of equipment in repair and the annual fund of working hours are recorded. Now that we have considered general provisions about the PPR schedule, consider a specific example. Let's assume that in our electrical facilities, in building 541, we have: 1) a three-phase two-winding oil transformer (T-1 according to the scheme) 6 / 0.4 kV, 1000 kVA; 2) pump motor, asynchronous (designation according to the scheme H-1), Рн=125 kW; Step 1. We enter our equipment into the empty form of the PPR schedule.

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Step 2 At this stage, we determine the resource standards between repairs and downtime. a) For our transformer: we open the reference book p. 205 and in the table "Standards for the frequency, duration and complexity of repair of transformers and complete substations" we find a description of the equipment that fits our transformer. For our power of 1000 kVA, we select the values ​​​​of the frequency of repairs and downtime during major and current repairs, and write them down in our schedule.

b) For an electric motor according to the same scheme - page 151 Table 7.1 (see figure).

We transfer the found standards in the tables to our PPR schedule

January 2005." href="/text/category/yanvarmz_2005_g_/" rel="bookmark">January 2005, the current one is January 2008. For the N-1 pump engine, the capital one is September 2009, the current one is March 2010. We introduce this data in a graph.

January 2011." href="/text/category/yanvarmz_2011_g_/" rel="bookmark"> January 2011, it is for this year that we draw up a schedule, therefore, in column 8 (January) for the T-1 transformer we enter “ T".

September 2015." href="/text/category/sentyabrmz_2015_g_/" rel="bookmark">September 2015. The current one is held 2 times a year (every 6 months) and, according to the latest current repairs, we plan for March and September 2011 Important note: if the electrical equipment is newly installed, then all types of repairs, as a rule, "dance" from the date the equipment was put into operation.Our schedule takes the following form:

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An important note: at some enterprises, power engineers in their annual PPR schedules, instead of the last two columns of annual downtime and the annual fund, indicate only one column - “Labor intensity, man * hour”. This labor intensity is calculated according to the number of pieces of equipment and the norms of labor intensity of one repair. This scheme is convenient when working with contractors performing repair work. Do not forget that the dates of repairs must be coordinated with the mechanical service and, if necessary, the instrumentation service, as well as with other structural divisions directly related to the repair and maintenance of related equipment. If you have any questions about the preparation of the annual PPR schedule, ask questions, I will try, if possible, to answer them in detail.

How to draw up an annual schedule for the maintenance of electrical equipment? I will try to answer this question in detail in today's post.

It's not a secret for anyone that the main document by which the repair of electrical equipment is carried out is the annual schedule of preventive maintenance of electrical equipment, on the basis of which the need for repair personnel, materials, spare parts, and components is determined. It includes each unit subject to major and current repairs of electrical equipment.

To draw up an annual preventive maintenance schedule (PPR schedule) for electrical equipment, we need standards for the frequency of equipment repairs. These data can be found in the manufacturer's passport data for electrical equipment, if the plant specifically regulates this, or use the reference book "System for maintenance and repair of power equipment". I use A.I. FMD in 2008, therefore, I will refer to this source further.

Download A.I. foot and mouth disease

So. Your household has a certain amount of power equipment. All this equipment must be included in the PPR schedule. But first, some general information about the annual PPR schedule.

Column 1 indicates the name of the equipment, as a rule, brief and understandable information about the equipment, for example, name and type, power, manufacturer, etc. Column 2 - number according to the scheme (inventory number). I often use numbers from electrical single-line diagrams or from technological ones. Columns 3-5 indicate the resource standards between major repairs and current ones. Columns 6-10 indicate the dates of the last major and current repairs. In columns 11-22, each of which corresponds to one month, the symbol indicates: K - capital, T - current. In columns 23 and 24, respectively, the annual downtime of equipment in repair and the annual fund of working hours are recorded. Now that we have considered the general provisions on the PPR schedule, let's consider a specific example. Let's assume that in our electrical facilities, in building 541, we have: 1) a three-phase two-winding oil transformer (T-1 according to the scheme) 6 / 0.4 kV, 1000 kVA; 2) pump motor, asynchronous (designation according to the scheme H-1), Рн=125 kW;

Step 1. We enter our equipment into the empty form of the PPR schedule.

Step 2 At this stage, we determine the resource standards between repairs and downtime:

a) For our transformer: we open the reference book p. 205 and in the table "Standards for the frequency, duration and complexity of repair of transformers and complete substations" we find a description of the equipment that fits our transformer. For our power of 1000 kVA, we select the values ​​​​of the frequency of repairs and downtime during major and current repairs, and write them down in our schedule.

b) For an electric motor according to the same scheme - page 151 Table 7.1 (see figure).

We transfer the found standards in the tables to our PPR schedule

Step 3 For the selected electrical equipment, we need to determine the number and type of repairs in the coming year. To do this, we need to determine the dates of the last repairs - major and current. Suppose we are making a schedule for 2011. The equipment is operational, the dates of repairs are known to us. For T-1, a major overhaul was carried out in January 2005, the current one - in January 2008. For the pump engine N-1, the capital one is September 2009, the current one is March 2010. We enter this data into the chart.

We determine when and what types of repairs are due for the T-1 transformer in 2011. As we know there are 8640 hours in a year. We take the found resource standard between major repairs for the T-1 transformer 103680 h and divide it by the number of hours in a year 8640 h. We calculate 103680/8640 = 12 years. Thus, the next overhaul should be carried out 12 years after the last overhaul, and since. the last one was in January 2005, which means that the next one is planned for January 2017. For current repairs, the same principle of operation: 25920/8640=3 years. The last maintenance was carried out in January 2008, thus. 2008+3=2011. The next current repair is in January 2011, it is for this year that we draw up a schedule, therefore, in column 8 (January) we enter “T” for the T-1 transformer.

For the electric motor we get; a major overhaul is carried out every 6 years and is planned for September 2015. The current one is held 2 times a year (every 6 months) and, according to the latest current repairs, we plan for March and September 2011. Important note: if the electrical equipment is newly mounted, then all types of repairs, as a rule, "dance" from the date the equipment was put into operation.

Our chart looks like this:

Step 4 We determine the annual downtime for repairs. For a transformer, it will be equal to 8 hours, because. in 2011, we planned one current repair, and in the resource norms for current repairs, the denominator is 8 hours. For the N-1 electric motor in 2011 there will be two current repairs, the downtime rate in the current repair is 10 hours. Multiply 10 hours by 2 and get an annual downtime equal to 20 hours. In the column of the annual working time fund, indicate the number of hours that this equipment will be in operation minus downtime for repairs. We get the final form of our graph.

An important note: at some enterprises, power engineers in their annual PPR schedules, instead of the last two columns of annual downtime and the annual fund, indicate only one column - “Labor intensity, man * hour”. This labor intensity is calculated according to the number of pieces of equipment and the norms of labor intensity of one repair. This scheme is convenient when working with contractors performing repair work.

Do not forget that the dates of repairs must be coordinated with the mechanical service and, if necessary, the instrumentation service, as well as with other structural units that are directly related to the repair and maintenance of related equipment.

If you have any questions about the preparation of the annual PPR schedule, ask questions, I will try, if possible, to answer them in detail.

table 2

The number of repairs per piece of equipment per year is calculated using formulas with an accuracy of 0.1:

number of overhauls К1к

K1k = Tk

Tk - calendar period = 24 hours. * 365 days = 8760 hours

Mk - the duration of the overhaul cycle.

K1k = 8 760 = 1 repair.

Number of current repairs K1t

K1t = Tk– K1k – K1s

K1t = 8 760 – 1 = 11 repairs.

2. The number of repairs for all equipment is determined by multiplying the number of repairs per piece of equipment by the corresponding amount of equipment:

A is the number of pieces of equipment.

Then the number of repairs for all equipment is determined by:

Kk \u003d K1k * A \u003d 1 * 5 \u003d 5 repairs.

Kt \u003d K1t * A \u003d 11 * 5 \u003d 55 repairs.

4.3. Calculation of labor intensity of repairs

To determine the labor costs for repairs and maintenance. services per year, the complexity of each type of repair is multiplied by the number of each repair during the year, determined when calculating the PPR schedules:

the complexity of major repairs:

Tk = 128 * 5 = 640 people * hour.

complexity of current repairs:

Tt \u003d 16 * 55 \u003d 880 people * hour.

the total labor intensity of all repairs, taking into account other costs that take into account the repair of your own workshop, will be:

Total \u003d (Tk + Tt) * Kpr. costs

Cpr. costs – coefficient of other costs = 1.1.

Total \u003d (640 + 880) * 1.1 \u003d 1,672 people * hour.

We summarize all the received data in a table:

The amount of repair work.

Table 4

4.4. Calculation of the number of workers required for repairs

1. To determine the number of days and hours that one worker must work during the year, a balance of working time per one average worker is drawn up, taking into account various working conditions and working hours.

When organizing planning and scheduling, network scheduling is used.

Network planning and management includes 3 main stages:

1. A network schedule is being developed that reflects the entire range of works, their relationship in a certain technological sequence to be completed to achieve the first goal;

2. Optimization in progress network graphics, i.e. choice of the received variant;

3. Operational management and control over the progress of work. The order of building a network diagram:

a list of works is compiled;

a list of events is compiled;

a rational technological sequence and interconnection of works is determined;

the need for material and labor resources for each work is determined;

set duration of work.

4.2 Drawing up a card-determinant of work for the network diagram.

Drawing up a job identification card is the first step in network planning. The identification card is compiled according to the following data:

norms for the duration of installation and deadlines for completion of work;

project for the production of electrical work and technological maps;

valid maps and prices for electrical work;

data on the duration of certain types of work based on practical experience.

The Department of the Chief Power Engineer works in close cooperation with the departments:

capital construction;

chief mechanic;

marketing department;

planning and economic.

Repair personnel calculation

Chrem \u003d Labor ppr / Ffak

Chrem=1986/1435=1.3=1 person

For safety reasons we accept 2 people

Staff on duty - around the clock

Changes per day

1st shift from 7 am to 4 pm

II shift from 16-23 hours

III shift from 23-7 hours

IV shift - day off

5. Operation of electrical equipment.

5.1 Preventive maintenance system.

The PPR system is a set of technical and organizational measures for the care, maintenance and repair of equipment, carried out in a planned manner and of a preventive nature.

This system is called planned because all activities are carried out according to a plan (schedule) within a predetermined timeframe.

It is called preventive because, in addition to repair work, it includes preventive measures that prevent accidents and breakdowns. Such activities include:

daily care;

equipment supervision;

overhaul maintenance - checking for accuracy;

• wash and oil change.

PPR system

overhaul

service

flushing