GOST 12.1 038 82 ssbt is called. Maximum permissible values ​​of touch voltages and currents

GOST 12.1.038-82*

Group T58

INTERSTATE STANDARD

Occupational Safety Standards System

ELECTRICAL SAFETY

Maximum permissible values ​​of touch voltages and currents

Occupational safety standards system. Electric safety.
Maximum permissible values ​​of pickp voltages and currents

OKSTU 0012

Date of introduction 1983-07-01

INFORMATION DATA

ENTERED INTO EFFECT by Decree of the USSR State Committee on Standards dated July 30, 1982 N 2987

The validity period was lifted according to Protocol No. 2-92 of the Interstate Council for Standardization, Metrology and Certification (IUS 2-93)

* REISSUE (June 2001) with Amendment No. 1, approved in December 1987 (IUS 4-88)


This standard establishes the maximum permissible values ​​of touch voltages and currents flowing through the human body, intended for the design of methods and means of protecting people when they interact with industrial and household electrical installations of direct and alternating current with a frequency of 50 and 400 Hz.

The terms used in the standard and their explanations are given in the appendix.

1. MAXIMUM ALLOWABLE VALUES OF TOUCH VOLTAGES AND CURRENTS

1. MAXIMUM ALLOWABLE VOLTAGE VALUES
TOUCH AND CURRENTS

1.1. Limits for touch voltages and currents are established for current paths from one hand to the other and from hand to feet.

(Changed edition, Amendment No. 1).

1.2. Touch voltages and currents flowing through the human body during normal (non-emergency) operation of an electrical installation should not exceed the values ​​indicated in Table 1.

Table 1

Notes:

1. Touch voltages and currents are given for a duration of exposure of no more than 10 minutes per day and are set based on the reaction of the sensation.

2. Touch voltages and currents for persons working in conditions of high temperatures (above 25 ° C) and humidity (relative humidity more than 75%) must be reduced by three times.

1.3. The maximum permissible values ​​of touch voltages and currents during emergency operation of industrial electrical installations with voltages up to 1000 V with a solidly grounded or insulated neutral and above 1000 V with an isolated neutral should not exceed the values ​​​​specified in Table 2.

Table 2

Note. The maximum permissible values ​​of touch voltages and currents flowing through the human body for a duration of exposure of more than 1 s, given in Table 2, correspond to releasing (alternating) and non-painful (direct) currents.

1.4. The maximum permissible values ​​of touch voltages during emergency operation of industrial electrical installations with a current frequency of 50 Hz, voltage above 1000 V, with solid grounding of the neutral should not exceed the values ​​​​specified in Table 3.

1.5. The maximum permissible values ​​of touch voltages and currents during emergency operation of household electrical installations with voltages up to 1000 V and a frequency of 50 Hz should not exceed the values ​​​​specified in Table 4.

Table 3

Table 4

Note. The values ​​of touch voltages and currents are established for people with a body weight of 15 kg.

1.3-1.5. (Changed edition, Amendment No. 1).

1.6. Human protection from the effects of touch voltages and currents is ensured by the design of electrical installations, technical methods and means of protection, organizational and technical measures in accordance with GOST 12.1.019-79.

2. CONTROL OF TOUCH VOLTAGES AND CURRENTS

2.1. To control the maximum permissible values ​​of touch voltages and currents, voltages and currents are measured in places where an electrical circuit may close through the human body. The accuracy class of measuring instruments is not lower than 2.5.

2.2. When measuring touch currents and voltages, the resistance of the human body in an electrical circuit at a frequency of 50 Hz should be modeled by a resistance resistor:

for table 1 - 6.7 kOhm;

for table 2 at exposure time

up to 0.5 s - 0.85 kOhm;

more than 0.5 s - resistance depending on voltage according to the drawing;

for table 3 - 1 kOhm;

for table 4 at exposure time

up to 1 s - 1 kOhm;

more than 1 s - 6 kOhm.

Deviation from the specified values ​​is allowed within ±10%.

2.1, 2.2. (Changed edition, Amendment No. 1).

2.3. When measuring touch voltages and currents, the resistance to the spread of current from a person’s legs should be modeled using a square metal plate measuring 25x25 cm, which is located on the surface of the earth (floor) in places where the person may be located. The load on the metal plate must be created by a mass of at least 50 kg.

2.4. When measuring touch voltages and currents in electrical installations, modes and conditions must be established that create the highest values ​​of touch voltages and currents affecting the human body.

APPENDIX (reference). TERMS AND THEIR EXPLANATIONS

APPLICATION
Information

(Changed edition, Amendment No. 1).

The text of the document is verified according to:
official publication
System of occupational safety standards: Sat. GOST. -
M.: IPK Standards Publishing House, 2001

GOST 12.1.038-82

UDC 621.316.92:006.354Group T58

INTERSTATE STANDARD

Occupational Safety Standards System

ELECTRICAL SAFETY

Occupational safety standards system. Electric safety.
Maximum permissible values ​​of pick-up voltages and currents

Date of introduction 1983-07-01

APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Standards dated June 30, 1982 No. 2987.

The validity period was lifted according to Protocol No. 2-92 of the Interstate Council for Standardization, Metrology and Certification (IUS 2-93)

REISSUE (June 2001) with Change No. 1 approved in December 1987 (IUS 4-88)

This standard establishes the maximum permissible values ​​of touch voltages and currents flowing through the human body, intended for the design of methods and means of protecting people when they interact with industrial and household electrical installations of direct and alternating current with a frequency of 50 and 400 Hz.

The terms used in the standard and their explanations are given in the appendix.

1. MAXIMUM ALLOWABLE VALUES OF TOUCH VOLTAGES AND CURRENTS

1.1. Limits for touch voltages and currents are established for current paths from one hand to the other and from hand to feet.

(Changed edition, Amendment No. 1).

1.2. Touch voltages and currents flowing through the human body during normal (non-emergency) operation of an electrical installation should not exceed the values ​​indicated in Table 1.

Table 1

Notes:

1 Touch voltages and currents are given for a duration of exposure of no more than 10 minutes per day and are set based on the sensation reaction.

2 Touch voltages and currents for persons working in conditions of high temperatures (above 25 ° C) and humidity (relative humidity more than 75%) must be reduced by three times

1.3. The maximum permissible values ​​of touch voltages and currents during emergency operation of industrial electrical installations with voltages up to 1000 V with a solidly grounded or insulated neutral and above 1000 V with an isolated neutral should not exceed the values ​​​​specified in Table 2.

Table 2

Note. The maximum permissible values ​​of touch voltages and currents flowing through the human body for a duration of exposure of more than 1 s, given in Table 2, correspond to releasing (alternating) and non-painful (direct) currents.

1.4. The maximum permissible values ​​of touch voltages during emergency operation of industrial electrical installations with a current frequency of 50 Hz, voltage above 1000 V, with solid grounding of the neutral should not exceed the values ​​​​specified in Table 3.

Table 3

1.5. The maximum permissible values ​​of touch voltages and currents during emergency operation of household electrical installations with voltages up to 1000 V and a frequency of 50 Hz should not exceed the values ​​​​specified in Table 4.

Table 4

Note. The values ​​of touch voltages and currents are established for people with a body weight of 15 kg.

1.3.-1.5. (Changed edition, Amendment No. 1).

1.6. Protection of a person from the effects of touch voltages and currents is ensured by the design of electrical installations, technical methods and means of protection, organizational and technical measures in accordance with GOST 12.1.019-79.

2. CONTROL OF TOUCH VOLTAGES AND CURRENTS

2.1. To control the maximum permissible values ​​of touch voltages and currents, voltages and currents are measured in places where an electrical circuit may close through the human body. The accuracy class of measuring instruments is not lower than 2.5.

2.2. When measuring touch currents and voltages, the resistance of the human body in an electrical circuit at a frequency of 50 Hz should be modeled by a resistance resistor:

for table 1 - 6.7 kOhm;
for table 2 at exposure time
up to 0.5 s -0.85 kOhm;
more than 0.5 s - resistance depending on voltage according to the drawing;
for table 3 - 1 kOhm;
for table 4 at exposure time
up to 1 s -1 kOhm;
more than 1 s - 6 kOhm.
Deviation from the specified values ​​is allowed within ±10%.

(Changed edition, Amendment No. 1).

2.3. When measuring touch voltages and currents, the resistance to current spreading from a person’s legs should be modeled using a square metal plate measuring 25x25 cm, which is located on the surface of the earth (floor) in places where the person may be located. The load on the metal plate must be created by a mass of at least 50 kg.

2.4. When measuring touch voltages and currents in electrical installations, modes and conditions must be established that create the highest values ​​of touch voltages and currents affecting the human body.

test

3. Permissible levels of touch voltages and currents according to GOST 12.1.038-82

GOST 12.1.038-82 "SSBT. Electrical safety. Maximum permissible levels of touch voltages and currents."

This GOST establishes maximum permissible levels of touch and currents flowing through the human body, intended for the design of methods and means of protecting people when they interact with industrial and household electrical installations of direct and alternating current with a frequency of 50 and 400 Hz. Maximum permissible levels of touch voltages and currents are established for current paths from one hand to the other and from hand to feet (Table 1).

Table 1

Maximum permissible touch voltages and currents during normal operation of electrical installations.

The maximum permissible levels of touch voltages and currents during emergency operation of industrial electrical installations with voltages up to 1000 V with a solidly grounded or insulated neutral and above 1000 V with an isolated neutral should not exceed the values ​​​​specified in Table 2. In this case, the emergency mode of an electrical installation is understood as such operation of a faulty electrical installation in which dangerous situations may arise, leading to electrical injury to people interacting with this electrical installation.

Table 2

Maximum permissible touch voltages and currents during emergency operation of electrical installations

Note: The maximum permissible levels of touch voltages and currents flowing through the human body for a duration of exposure of more than 1 s, given in Table 1, correspond to releasing (alternating) and non-painful (direct) currents.

From the considered electrical safety criteria, it follows that human protection from the effects of touch voltages and currents can be ensured either by the design of electrical installations, technical methods and means of protection, or by reducing the current flowing through the human body, or by reducing the time of its exposure.

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GOST 12.1.038-82

Group T58

STATE STANDARD OF THE USSR UNION

Occupational Safety Standards System

ELECTRICAL SAFETY

Maximum permissible values ​​of touch voltages and currents

Occupational safety standards system.

Electric safety. Maximum permissible values ​​of pick-up voltages and currents

Date of introduction 1983-07-01

INFORMATION DATA

1 DEVELOPED AND INTRODUCED by the All-Union Central Council of Trade Unions

DEVELOPERS A.S. Dalnov (topic leader); G.P. Saversky; N.L. Nevedomsky; I.N.Dorozhkin

2 APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Standards dated June 30, 1982 No. 2987.

3 Inspection frequency is 5 years.

4 REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

5 The validity period was lifted by decision of the Interstate Council for Standardization, Metrology and Certification (IUS No. 2-93)

6 REISSUE (January 1996) with Change No. 1, approved in December 1987 (IUS No. 4-88)

This standard establishes the maximum permissible values ​​of touch voltages and currents flowing through the human body, intended for the design of methods and means of protecting people when they interact with industrial and household electrical installations of direct and alternating current with a frequency of 50 and 400 Hz.

The terms used in the standard and their explanations are given in the appendix.

1 MAXIMUM ALLOWABLE VALUES OF TOUCH VOLTAGES AND CURRENTS

1.1 The maximum permissible values ​​of touch voltages and currents are established for current paths from one hand to the other and from hand to feet.

(Changed edition, Amendment No. 1).

1.2 Touch voltages and currents flowing through the human body during normal (non-emergency) operation of an electrical installation must not exceed the values ​​indicated in Table 1.

Table 1

1.3 The maximum permissible values ​​of touch voltages and currents during emergency operation of industrial electrical installations with voltages up to 1000 V with a solidly grounded or isolated neutral and above 1000 V with an isolated neutral should not exceed the values ​​​​specified in Table 2.

Table 2

1.4 The maximum permissible values ​​of touch voltages during emergency operation of industrial electrical installations with a current frequency of 50 Hz, voltage above 1000 V, with solid grounding of the neutral should not exceed the values ​​​​specified in Table 3.

Table 3

1.5 The maximum permissible values ​​of touch voltages and currents during emergency operation of household electrical installations with voltages up to 1000 V and a frequency of 50 Hz should not exceed the values ​​​​specified in Table 4.

Table 4

1.3-1.5 (Changed edition, Amendment No. 1).

1.6 Protection of humans from the effects of touch voltages and currents is ensured by the design of electrical installations, technical methods and means of protection, organizational and technical measures in accordance with GOST 12.1.019-79.

2 CONTROL OF TOUCH VOLTAGES AND CURRENTS

2.1 To control the maximum permissible values ​​of touch voltages and currents, voltages and currents are measured in places where an electrical circuit may close through the human body. The accuracy class of measuring instruments is not lower than 2.5.

2.2 When measuring touch currents and voltages, the resistance of the human body in an electrical circuit at a frequency of 50 Hz should be modeled by a resistance resistor:

for table 1 - 6.7 kOhm;

for table 2 at exposure time

up to 0.5 s -0.85 kOhm;

more than 0.5 s - resistance depending on voltage according to the drawing;

for table 3 - 1 kOhm;

for table 4 at exposure time

up to 1 s -1 kOhm;

more than 1 s - 6 kOhm.

Deviation from the specified values ​​is allowed within ±10%.

(Changed edition, Amendment No. 1).

2.3 When measuring touch voltages and currents, the resistance to the spread of current from a person’s legs should be modeled using a square metal plate measuring 25x25 cm, which is located on the surface of the earth (floor) in places where the person may be located. The load on the metal plate must be created by a mass of at least 50 kg.

2.4 When measuring touch voltages and currents in electrical installations, modes and conditions must be established that create the highest values ​​of touch voltages and currents affecting the human body.

Application

(informative)

Terms and their explanations

(Changed edition, Amendment No. 1).