Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T 7116-1993
Vacuum Type Motor Starter
1993-10-08 Issued
Ministry of Machinery Industry of the People's Republic of China
1994-01-01 Implementation
Mechanical Industry Standard of the People's Republic of China
Vacuum Type Motor Starter
JB/T7116-1993
This standard adopts the IEC-632-1 "High Voltage Motor Starter Part 1 Direct Full Voltage AC Starter" standard. Subject Content and Scope of Application
This standard specifies the basic requirements for vacuum type starters (referred to as F-C combination electrical appliances or starters) with a rated working voltage of 6.3kV or less, which are combined with vacuum contactors, current limiting fuses and integrated protection relays. It includes the characteristics of the starter, the relevant conditions, structure and insulation performance that the starter should comply with, and the test methods to verify that the combined electrical appliances meet these requirements, and specifies the main technical data and parameters that the manufacturer should provide to users.
This standard applies to the starters in the following non-disclosed devices with a main circuit rated voltage of AC 50Hz and a rated working voltage greater than 1.2kV but not exceeding 6.3kV. A single-input single-output direct starter (main bus or cable) equipped with overload and short-circuit protection; a.
b. A single-input multiple-output direct starter (main bus or cable) equipped with overload and short-circuit protection. Note: For control used in power transformers and capacitor banks, the relevant provisions of this standard can also be referred to. For pressure reducing starters, rotor rheostat starters and reversible starters, the corresponding relevant provisions of this standard can also be referred to. 2 Reference standards
GB14048.1
GB3906
GB14048.5
GB14048.4
GB3309
General rules for low-voltage switchgear and controlgear
3~35kV AC metal-enclosed switchgear
Insulation coordination of high-voltage power transmission and distribution equipment
Low-voltage switchgear and controlgear Control circuit appliances and switch elements Part 1 Electromechanical control circuit appliances
Low-voltage switchgear and controlgear
Low-voltage electromechanical contactors and Mechanical tests on high-voltage switchgear for motor starters under normal overflow conditions GB/T4942.2
Degrees of protection of enclosures for low-voltage electrical appliances
IEC282--1
JB7122
High-voltage fuses Part 1
Current-limiting fuses
Basic requirements for AC vacuum contactors
GB/T2900.18 Electrical terminology Low-voltage electrical appliances
3 Terms, symbols and codes
3.1 Terms
For terms not specified in this standard, refer to the relevant terms and their definitions in GB/T2900.18. 3.1.1 Starter terminology
3.1.1.1 Integrated starter
4.4.29 in GB/T2900.18 applies
3.1.1.2 Vacuum integrated starter
Integrated starter with vacuum contactor for main circuit operation switch. 3.1.1.3 Non-leaking device
Approved by the Ministry of Machinery Industry on October 8, 1993
Implemented on January 1, 1994
JB/T7116-1993
The equipment in this device does not withstand atmospheric overvoltage. Generally, this device is connected to the cable network. 3.1.1.4 Overload relay or release
4.5.9 of GB/T2900.18 applies
3.1.1.5 Thermal overload relay or release
4.5.9.2 of GB/T2900.18 applies
3.1.1.6 Pressure reducing starter
1.1.2.2 of GB14048.4 applies
3.1. 1.7 Rotor rheostatic starter
4.4.25 of GB/T2900.18 applies
3.1.1.8 Reversible starter
4.4.16 of GB/T2900.18 applies
3.1.2 Terminology of contactors
3.1.2.1 Vacuum contactor
A contactor whose main contacts open and close in a high vacuum shell. 3.1.2.2 Electromagnetic contactor
4.4.5 of GB/T2900.18 applies
3.1.2.3 Latch contactor
4.4.9 of GB/T2900.18 applies
3.1.2.4 Release
4.5.6 of GB/T2900.18 applies
3.1.3 Terminology of fuse
3.1.3.1 Current-limiting fuse
GB/T2900.18 4.7.9 applies
3.1.3.2 Backup protection fuse
4.7.11 in GB/T2900.18 applies
3.2 Symbols
3.2 in GB14048.1 applies
3.3 Code
3.3 in GB14048.1 applies
Classified by control mode
Automatic starter (operated by the main switch or program control); non-automatic starter (such as manual operation or button operation). Classified by operation mode
Electromagnetic operation:
Motor operation.
Classified by the degree of protection provided by the casing
See the corresponding GB4942.2.
Characteristics Overview
The characteristics of the starter can be described by the following items: a.
Type of starter (see 5.2);
JB/T7116-1993
Rated value and limit value of main circuit (see 5.3); Category of use (see 5.4);
Control circuit (see 5.5);
Auxiliary circuit (see 5.6);
Type and characteristics of relay and release (see 5.7); and coordination with short-circuit protection current-limiting fuse (see 5.8). g.
Note: For the overvoltage problem caused by the starter disconnecting the load circuit, the manufacturer should provide the relevant parameters or protection measures of overvoltage in the specific product standards or technical conditions.
Type of starter
The following items should be specified:
a. Number of poles;
b. Mode of operation.
5.3 Rated value and limit value of main circuit
5.3.1 Rated voltage
The starter is limited by the following rated voltage, and the rated voltage value should comply with the provisions of GB156. 5.3.1.1 Rated working voltage Ue
The combination of the rated working voltage and rated working current of the starter determines the use category of the electrical appliance, and various use categories and various tests are related to these two basic parameters. For multi-phase circuits, this voltage refers to the phase-to-phase voltage. A starter can have different combinations of rated working voltage and rated working current corresponding to different working systems and different use categories. 5.3.1.2 Rated insulation voltage (U.)
The rated insulation voltage is related to the dielectric performance test, electrical clearance and creepage distance. In any case, the maximum rated working voltage should not exceed the rated insulation voltage. For starters whose rated insulation voltage has not been clearly specified, the maximum rated voltage value can be regarded as the rated insulation voltage.
3.3.2 Rated current
The starter is limited by the following rated current:
5.3.2.1 Rated thermal current (Ia)
The rated thermal current (Ia) of a starter equipped with a suitable overload relay is the maximum current that can pass through it in an eight-hour working system (see Article 5.3.4.1). When tested in accordance with the provisions of Article 8.2.3, the temperature rise of its various parts shall not exceed the limits specified in Article 7.3 (Tables 4 and 5). Unless the manufacturer and the user have specially agreed, the rated thermal current of the starter shall not be less than: a.
When the starter is equipped with a type 1 overload relay, the set current of the type 1 overload relay (or the maximum value of the set current range); b.
When the starter is equipped with a type 2 overload relay, 0.87 times the set current of the type 2 overload relay (or 0.87 times the maximum value of the set current range).
5.32.2 Rated operating current (1.) or rated operating power (P.) The rated operating current (I) of the starter shall be specified by the manufacturer and shall be consistent with the rated current, rated operating voltage (see 5.3.1), rated frequency (see 5.3.3), rated operating mode (see 5.3.4), and usage category (see 5.4) and the type of protective housing.
The rated operating current of the starter can be replaced or supplemented by the rated output power (kW) of the motor it is intended to operate at the rated operating voltage. The manufacturer should explain the relationship between current and power. 5.3.3 Rated frequency
The rated frequency of the starter is the power supply frequency used in the design of the starter, and other characteristic parameters of the starter are related to it. 5.3.4 Rated working system
The standard rated working systems are as follows: 3Www.bzxZ.net
5.3.4.1 Eight-hour working system
JB/T 7116—1993
This working system is that the main contacts of the starter remain closed and a stable current is cut off to achieve thermal equilibrium, but the power-on time does not exceed 8h.
The eight-hour working system is a basic working system, and the rated heating current of the starter is determined based on this basic working system. 5.3.4.2 Uninterrupted working system
This working system is that the main contacts of the starter remain closed and carry a stable current exceeding Sh (several weeks or months) without interruption. This working system is different from the eight-hour working system. Since contact oxidation and dust accumulation will lead to a vicious cycle of contact heating, the starter can meet the requirements by reducing capacity or taking special designs when used in uninterrupted working system. 5.3.4.3 Continuous cycle working system
This working system is that there is a certain ratio between the time when the main contacts of the starter remain closed and the no-load time. Both of these times are very short, so that the starter cannot reach thermal equilibrium.
The continuous cycle working system is explained by three parameters (current value, number of operating cycles per hour and load factor). The load factor is the ratio of the power-on time to the entire cycle, usually expressed as a percentage. Its standard values are: 15%, 25%, 40% and 60%. The starter is divided into the following levels according to the number of operation cycles that can be completed per hour, that is, the operation frequency: Level 1
Level 120
Level 300
1 time/hour
3 times/hour
12 times/hour
30 times/hour
120 times/hour
300 times/hour
One operation is a complete operation cycle, that is, it includes one closing and one opening. For the intermittent cycle working system with a very high operation frequency, the manufacturer should determine the rated working current according to the actual number of operations (if known) or the specified number of operations, and its value should be rdt≤u't
Where; t. ---One complete operation cycle:. Instantaneous value of current.
Note: Under the intermittent cycle working system, the difference in thermal time constant between the overload relay and the motor may make the thermal relay unsuitable for overload protection. For equipment specified for intermittent cycle operation, its overload protection performance is recommended to be stated in the special contract signed by the manufacturer and the user. 5.3.4.4 Short-time operation
This operation is that the time for the starter main contacts to remain closed and energized is not enough for it to reach thermal equilibrium, and the no-load time is enough for the starter temperature to return to the same temperature as the cooling medium. The standard short-time operation is that the time for the main contacts to be closed and energized is 10, 30, 60, and 90 minutes. 5.3.5 Making and breaking capacity
The making and breaking capacity of the starter is the current value that can be made and broken under the conditions of the specified rated working voltage, rated working current and use category (see Article 5.4) (as specified in Table 10. For AC, it is expressed as the effective value of the symmetrical component). For requirements for combined use with short-circuit protection devices, see Article 5.8.
5.3.5.1 Rated making capacity
The rated making capacity of the starter is the current value determined by the steady-state conditions that the starter can make under the specified making conditions without serious welding of the vacuum chamber contacts or excessive wear of the contacts. The making conditions that must be specified are:
The voltage between the two poles before the contacts close;
The characteristics of the test circuit.
JB/T71161993
The rated making capacity of the starter is determined by the rated working voltage, rated working current and use category as specified in Table 10. The rated making capacity is expressed by the effective value of the symmetrical component of the current. The rated making capacity of the starter is valid only when it works within the action range specified in Article 7.5 of the action performance requirements. 5.3.5.2 Rated breaking capacity
The rated breaking capacity of the starter is the rated breaking capacity of the starter under the specified breaking conditions and at the rated working voltage. The current value that can be interrupted without excessive contact wear or damage to the vacuum interrupter. The interruption conditions that must be specified are:
Characteristics of the test circuit;
Recovery voltage,
The starter should be able to interrupt all load current values below the rated breaking capacity. The rated breaking capacity of the starter is related to the rated working voltage, rated working current and use category, and is expressed in accordance with the provisions of Table 10. The rated breaking capacity is expressed by the effective value of the AC component of the current. 5.3.5.3 Ability to withstand overload current
During the overload relay operation time, the starter should be able to carry the current corresponding to the maximum rated breaking capacity without damage or obvious deformation.
5.4 Use category
This standard specifies the use categories listed in Table 1 as standard use categories. Any other use categories are recommended to be provided by the manufacturer or negotiated between the manufacturer and the user.
Each use category is characterized by current (expressed as multiples of the rated working current), voltage (expressed as multiples of the rated working voltage), power factor, and other test conditions of the rated making and breaking capacity. Table 1 Use Category
Use Category
AC - 3
AC—4
Non-inductive or low-inductive load, resistor protection
Typical applications
Starting of wound-rotor induction motors, disconnecting the starting of squirrel-cage asynchronous motors, disconnecting the starting of squirrel-cage asynchronous motors during operation, inching, reverse braking and reverse "Note; the starter for squirrel-cage motors with capacitor banks to improve power factor should meet the special requirements between the manufacturer and the user. 1》Inching means to make and break the motor or line circuit several times in a very short time to make the driven mechanism move a little. 2) Reverse braking and reverse inquiry means that when the motor is running, the motor is stopped or reversed quickly by reversing the motor stator winding. 5.5 Control circuit
5 5.1 Electrical control circuit
The characteristics of the electrical control circuit are:
Current type:
Rated frequency (if it is AC):
Rated control circuit voltage Ue (type, when it is AC, the frequency must be stated); rated control power supply voltage Us (type, when it is AC, the frequency must be stated). Note: The control circuit voltage is the voltage that appears on the normally open contacts of the control circuit electrical appliance in the control circuit + the control power supply voltage is the voltage applied to the input terminal of the control circuit of the appliance. Due to the connection of transformers, rectifiers and inductors, the control power supply voltage may be different from the control circuit voltage. The rated control circuit voltage Uc and the rated frequency are parameters that determine the insulation performance of the control circuit. Rated control The power supply voltage Us and rated frequency are the parameters that determine the action characteristics and temperature rise characteristics of the control circuit. The correct operating condition is that the control power supply voltage value should neither be less than 85% Us (when the control circuit passes the maximum current) nor greater than 110% Us. When the circuit is open. The control 5
JB/T7116—1993
The power supply voltage should not exceed 120% of the rated power supply voltage Us. The rated control circuit voltage, its value should be selected according to Table 2. Table 2 Standard values of rated control circuit voltage
48, 110, 220
36.48.110, 127, 220, 380
The manufacturer should state the voltage of the control circuit under the rated control circuit power supply voltage. Current value. 5.6
Auxiliary circuit
The characteristics of the auxiliary circuit to be specified:
Number of auxiliary circuits:
The type of contact (normally closed contact, normally open contact, etc.) and the number of each contact in each auxiliary circuit. 5.6.2
The characteristics of the auxiliary contact to be specified,
Rated voltage;
Rated frequency;
Rated current:
The rated switching capacity of the contact.
Unless otherwise specified, the rated thermal current of the auxiliary circuit is 6A. 5.7
Types and characteristics of relays and releases
Note: In the following text, the term "overload relay" will be used to represent "overload detector or overload release". 5.7.1 Type
5. 7. 1. 1
5. 7. 1. 2
5. 7. 1. 3
5. 7. 1. 4
5. 7. 1.5
Releaser with shunt coil (shunt trip. Relay or release for undervoltage release. Overload relay, its delay:
Basically has nothing to do with the load before the overload occurs (such as electromagnetic or electronic overload delay relay): related to the load before the overload occurs (such as thermal overload relay): related to the load before the overload occurs (such as thermal overload with phase failure protection relay) and can respond to phase failure. Overcurrent relay or release (if applicable). Other relays or releases (such as three-phase unbalanced maintenance appliances, etc.). 5.7.2 Characteristics
Releaser with shunt coil and relay or release for undervoltage release: 5. 7. 2. 1
5. 7. 2. 2
Rated voltage;
Rated frequency.
Full load current or final operating current of the motor matched by the overload relay
; Rated frequency;
Set current (or set current range);
Time-
Current characteristics or characteristic range:
Number of poles;
Type of relay: thermal, electromagnetic or electronic. 5.7.3 Name and setting current of overload relay Overload relay is rated by its type and setting current; a.
If If the set current is related to the full load current of the matching motor, it is called a type 1 overload relay (see 7.5.3.2.1.a); if the set current is the final operating current, it is called a type 2 overload relay (see 7.5.3.2.1.b). Both types of overload JB/T7116-1993
relays are rated by the set current (if the set current is adjustable, it is rated by its upper and lower limits). The set current (or set current range) should be marked on the overload relay or on its dial. The mark can be directly in amperes or in electrical The function of the current is indicated on the relay or on the replaceable thermal element of the thermal relay. However, if the use conditions or other factors that affect the set current are not easy to mark on the relay, the relay or other replaceable parts (such as thermal elements, control coils or current transformers) should be marked with a unified number or mark, through which relevant information can be obtained from the manufacturer or its product catalog. Of course, it is best to obtain relevant data directly from the information carried by the starter. In the case of overload devices that are indirectly operated by current transformers, the mark can be the primary current of the current transformer or the set current of the overload relay. In both cases, the transformer ratio should be indicated. 5.7.4 Time-current characteristics of overload devices The manufacturer should provide time-current characteristics in the form of a cluster of curves. These curves should be made under the condition that the overload relay is not preloaded (i.e. starting from the cold state). The current of the response curve should not be less than seven times the full load current of the motor specified to match the relay. The manufacturer should explain the error range of these curves in an appropriate way. When the manufacturer provides the time-current response curve corresponding to the maximum and minimum set currents, the manufacturer shall provide the time-current response curves. If the time-current characteristic is adjustable, it is recommended to provide the corresponding maximum and minimum setting time of the characteristic curve. Note: In order to facilitate the study and comparison of the coordination of various types of time-current characteristics, it is recommended to draw various time-current-electro-hydraulic characteristic curves on the same standard coordinate paper, with current represented by the horizontal axis and time represented by the vertical axis, and using double logarithmic coordinates. The horizontal axis has a longer dimension and the vertical axis has a shorter dimension, and the ratio is 2:1. The time-current characteristic should be represented on A3 or A4 standard coordinate paper. Each decimal size should be selected from the following preferred values:
2, 4.8.16 and 2.8.5.6, 11.2cm,
. 2.8cm and 5.6cm should be used as much as possible. Unless otherwise specified in the product standard, it is recommended that time be expressed in seconds and current in amperes or current multiples. 5.7.5 Effect of ambient air temperature
The time-current characteristic (see 5.7.4) is related to the specified ambient air temperature, so the ambient air temperature should be clearly indicated on the time-current characteristic curve. It is generally recommended to be +20℃, and it can also be +40℃. When the ambient air temperature is in the range of -5℃ to +40℃, the overload relay should be able to operate. The manufacturer should explain the effect of ambient air temperature changes on the overload relay.
Note: It should be taken into account that the air temperature in the starter may exceed +40℃. 5.8 Coordination with current-limiting fuses (SCPD) 5.8.1 General requirements for coordination
The responsibility of the starter manufacturer is: When the fuse is an integral part of the starter, the manufacturer shall select an appropriate fuse that meets the following requirements.
5.8.1.1 The fuse shall be installed on the power supply side of the starter, and its short-circuit breaking capacity shall not be less than the expected short-circuit current at the installation point. If the specific product standard does not specify, the fuse limit short-circuit breaking current specified in this standard shall not be less than 40kA. 5.8.1.2 The fuse shall not replace the starter to break all currents below the maximum overload during normal operation (including the motor's locked-rotor current). However, the fuse can withstand these currents for at least the tripping time of the corresponding overload relay. 5.8.1.3 For all overcurrent values applicable to the integrated starter of fuses and contactors, the action of the starter shall make its external phenomena (such as arc flames and hot gas spray) not exceed the safe area specified by the starter manufacturer. 5.8.2 Different types of coordination and corresponding requirements For the breaking current of the starter exceeding the corresponding use category shown in Table 10, the current flowing through the starter during the breaking time may cause damage to the starter itself. According to the allowable damage procedure, it can be divided into the following types of coordination; "a" type - any form of damage to the starter itself is allowed, "if the original shell, the outer shell remains intact). After inspection, the starter may need to replace some parts, such as contacts, arc extinguishing chamber, overload relay or the entire starter may need to be replaced. The inspection also includes dielectric tests (see 8.2.4).
Type "b" - The characteristics of the overload relay of the starter may be permanently changed, but no damage exceeding the last paragraph of this clause will occur. 7
JB/T7116-1993
Type "." A starter shall not be damaged beyond the last paragraph of this clause, and its overload relay characteristics shall not be permanently changed. For all types of coordination, slight burns of contacts are allowed, and welding of contacts is also allowed. The degree of welding varies with the current limiting fuse used. When it is required to be used in situations where there is basically no contact welding, the agreement between the manufacturer and the user or the welding of contacts can be detected by simple methods.
Type and characteristics of current limiting fuses
For a given starter, the starter manufacturer should indicate. In order to obtain a given matching type, a fuse of suitable type and characteristics is required, as well as the maximum expected short-circuit current at the rated working voltage specified in the corresponding combination. In order to facilitate the estimation of the performance of the starter when the selected current-limiting fuse is different from that specified by the starter manufacturer, it is recommended that the starter manufacturer should specify the model and specification of the short-circuit protection fuse used for each specification in the specific product standard. When the current-limiting fuse itself is a component of the starter, several models and specifications can also be recommended. For the vacuum contactor used with the starter, the maximum allowable beep current corresponding to the given matching type; for the overload relay of the starter, the maximum current and maximum allowable joule integral that the starter can withstand alone from the cold state corresponding to the given matching type.
Fuse manufacturer's description
The maximum peak current and maximum Joule integral of the fuse as a function of the expected short-circuit current: the time-current characteristic of the fuse
c. In addition to meeting the coordination requirements with the vacuum contactor in the starter, the current-limiting fuse used in the starter shall also meet the provisions of the 1FC282-- standard, as well as supplementary provisions for motors, transformers and power capacitors. Normal working and installation conditions
Normal working conditions
Starters that comply with this standard shall be able to operate under the following standard conditions in non-dissipated devices. Non-standard operating conditions shall be resolved through consultation between the manufacturer and the user. 6.1.1
Ambient air temperature
The maximum ambient air temperature shall not exceed +40°C: the average value of the ambient air temperature for 24 hours shall not exceed +35°C; b.
The lower limit of the ambient air temperature shall not be lower than -5°C. The lower limit of the ambient air temperature shall be -10°C or -25°C. The user shall inform the manufacturer when placing an order. Note: @
When the upper limit of the ambient air temperature exceeds +40°C or the lower limit is lower than -25°C, the user shall consult with the manufacturer! 2
6.1.2 Altitude
The altitude of the installation site shall generally not exceed 1000m. Note: When the starter is used at a higher altitude, it shall be considered that the electrical strength and cooling effect of the air are reduced. Therefore, the user shall consult with the manufacturer. 6.1.3 Atmospheric conditions
The relative humidity of the atmosphere shall not exceed 50% when the ambient air temperature is +40°C; higher relative humidity may be allowed at lower temperatures: the average maximum relative humidity of the wettest month shall be 90%. At the same time, the average minimum temperature of the month shall be +25°C. Condensation on the surface of the product due to temperature changes shall be considered.
Note: For starters designated for constant temperature and humidity locations with air-conditioning equipment, the humidity conditions and the presence or absence of condensation shall be separately specified by product standards or technical documents.
Shock and vibration
The relevant shock and vibration conditions shall be specified in the specific product standards or negotiated between the user and the manufacturer. Note: For general-purpose starters, unless otherwise specified in the product standard, impact alarm is generally not considered. 8
6.2 Installation
6.2.1 Installation
JB/T7116-1993
Normal installation conditions should be in accordance with the manufacturer's installation instructions. For electrical appliances with specified installation positions or whose performance is significantly affected by installation conditions, installation cases should be clearly specified in product standards and technical specifications. 7
Structural and performance requirements
Structural requirements
7.1.1 Materials should be suitable for the intended use and be able to pass the corresponding tests. Special attention should be paid to the hazards of flame and moisture to performance, and some insulating materials must be protected from moisture. Except for porcelain or other more suitable materials, contact pressure should not be passed through insulating materials unless the metal parts have sufficient elasticity to compensate for any possible shrinkage of the insulating material. 7.1.2 Electrical clearance and creepage distance
The electrical clearance and collector distance of the main circuit of the starter with pure air as insulation are shown in Table 3. Table 3 Electrical clearance and creepage distance
Rated working voltage kV
Between conductor and ground
Between conductors of different phases
Conductor to non-porous filter
Before the same-pole contact of the main circuit
Terminal
Structural requirements of the terminal
The connection between the terminal and the wire can be made by screws or other effective methods, but it must be ensured that the necessary connection pressure can be maintained for a long time. The terminal should be designed so that the wire has sufficient connection pressure between the clamped metal surfaces to compress the wire surface without damaging the wire. The structure of the terminal should ensure that the wire will not be displaced, so as to damage its work or reduce the insulation level of the given installation category. The terminal should be easy to connect with the external wire. The terminal is usually used to clamp a single wire, but it should also be considered suitable for clamping multiple wires. The screws and nuts used to tighten the wires on the terminals shall not be used to fix other parts. 7.1.3.2 Arrangement of wiring terminals
The wiring terminals designated for connection with external conductors shall be arranged clearly and easily visible under the specified optimal conditions. 7.1.3.3 Grounding terminal For the purpose of this standard, the frame, structure and fixed parts of any metal casing or component shall be electrically connected to each other and connected to the mirror grounding terminal. The electrical terminal shall be marked with a durable and secure symbol ③ or the letter symbol PE. Unless otherwise specified in the standard, the general size of the grounding stud is M12. 7.2 Casing 7.2.1 General requirements The casing of the starter must be metal (except for ventilation and exhaust) and shall not be made of mesh, fire-resistant or fire-resistant materials. It shall have a certain strength. All components of the main circuit of the starter shall be installed in a metal casing, and the protection level of the casing shall meet the relevant provisions of GB4942,2. Fume panels and doors 7.22.! When the cover and door are part of the enclosure, the cover and door shall be made of resistant metal and have the same protection level as the enclosure. 9
JB/T7116—1993
7.2.2.2 The cover and door shall not be made of mesh woven fabrics or machine-made metal meshes and similar materials. And according to the different situations in which the high-voltage main circuit room needs to be entered, the cover-type door is divided into two categories: a.
During normal operation and maintenance, the cover (fixed cover) that does not need to be opened should not be opened, folded down or moved without using tools: the cover and door that need to be opened during normal operation and maintenance (removable cover and door) should be opened or moved without using tools and should have appropriate interlocking devices to ensure the safety of the operator. When the starter enclosure cabinet adopts a metal armored or partitioned structure, the cover and door can only be opened when the main circuit part that may be touched in the isolation room is not energized.
7.2.3 Partitions and valves
When partitions and valves are used inside the starter, they shall meet the relevant provisions of GB3906. Interlocking and prevention of misoperation
7. 2. 4. 1
The starter shall have the following interlocking devices and measures to prevent misoperation, to prevent misclosing or misopening of high-voltage vacuum contactors; to prevent misclosing or misopening of isolating switches (or isolating plugs) with load; to prevent power transmission with grounding wires (or grounding switches); to prevent hanging grounding wires (or connecting grounding switches) with power on; to prevent mistaken entry into live isolation or small rooms inside the machine. In addition to the above-mentioned anti-misoperation interlocking requirements, the starter shall also be operated according to the procedures specified in the specific product standards, and the procedures may be determined by the machine or electrical interlocking device.
7.3 Temperature rise
7.3.1 Temperature rise of starter
When the starter is tested according to the conditions specified in Article 8.2.3, the temperature rise of each part of the starter shall not exceed the limit values specified in Tables 4 and 5.
Limit value of temperature rise of insulated coil in air
Grade of insulating material
7.3.2 Surrounding air temperature
Limit of temperature rise of wire in air
(electric Resistance method)
The temperature rise limits given in Tables 4 and 5 are only applicable when the ambient air temperature is within the specified values given in Article 6.1.1. 7.3.3 Main circuit temperature rise
The main circuit of the starter should be able to carry the following currents, and its temperature rise should not exceed the limit values specified in Table 5. 2. Eight-hour working system, rated thermal current: b. Uninterrupted working system, intermittent cycle working system or short-time working system, rated working current. 7.3.4 Control electromagnet winding temperature rise
When the main circuit passes the rated thermal current or rated working current, the coil winding, including the coil winding of the electrical operating valve of the electric-pneumatic starter, should be able to withstand continuous power-on at rated voltage and rated frequency (if any), and the temperature rise does not exceed the limits specified in Tables 4 and 5. Coils with special ratings, such as the tripping coil of the locking starter and some solenoid valve coils of the interlocking pneumatic starter, should be able to withstand the maximum number of operations specified for them without being damaged. 102 Electrical clearance and creepage distance
The electrical clearance and collector distance of the main circuit of the starter with pure air as insulation are shown in Table 3. Table 3 Electrical clearance and creepage distance
Rated working voltage kV
Between conductor and ground
Between conductors of different phases
Conductor to non-porous filter
Before the same-pole contact of the main circuit
Terminal
Structural requirements of the terminal
The connection between the terminal and the wire can be made by screws or other effective methods, but it must be ensured that the necessary connection pressure can be maintained for a long time. The terminal should be designed so that the wire has sufficient connection pressure between the clamped metal surfaces to compress the wire surface without damaging the wire. The structure of the terminal should ensure that the wire will not be displaced, so as to damage its work or reduce the insulation level of the given installation category. The terminal should be easy to connect with the external wire. The terminal is usually used to clamp a single wire, but it should also be considered suitable for clamping multiple wires. The screws and nuts used to tighten the wires on the terminals shall not be used to fix other parts. 7.1.3.2 Arrangement of wiring terminals
The wiring terminals designated for connection with external conductors shall be arranged clearly and easily visible under the specified optimal conditions. 7.1.3.3 Grounding terminal For the purpose of this standard, the frame, structure and fixed parts of any metal casing or component shall be electrically connected to each other and connected to the mirror grounding terminal. The electrical terminal shall be marked with a durable and secure symbol ③ or the letter symbol PE. Unless otherwise specified in the standard, the general size of the grounding stud is M12. 7.2 Casing 7.2.1 General requirements The casing of the starter must be metal (except for ventilation and exhaust) and shall not be made of mesh, fire-resistant or fire-resistant materials. It shall have a certain strength. All components of the main circuit of the starter shall be installed in a metal casing, and the protection level of the casing shall meet the relevant provisions of GB4942,2. Fume panels and doors 7.22.! When the cover and door are part of the enclosure, the cover and door shall be made of resistant metal and have the same protection level as the enclosure. 9
JB/T7116—1993
7.2.2.2 The cover and door shall not be made of mesh woven fabrics or machine-made metal meshes and similar materials. And according to the different situations in which the high-voltage main circuit room needs to be entered, the cover-type door is divided into two categories: a.
During normal operation and maintenance, the cover (fixed cover) that does not need to be opened should not be opened, folded down or moved without using tools: the cover and door that need to be opened during normal operation and maintenance (removable cover and door) should be opened or moved without using tools and should have appropriate interlocking devices to ensure the safety of the operator. When the starter enclosure cabinet adopts a metal armored or partitioned structure, the cover and door can only be opened when the main circuit part that may be touched in the isolation room is not energized.
7.2.3 Partitions and valves
When partitions and valves are used inside the starter, they shall meet the relevant provisions of GB3906. Interlocking and prevention of misoperation
7. 2. 4. 1
The starter shall have the following interlocking devices and measures to prevent misoperation, to prevent misclosing or misopening of high-voltage vacuum contactors; to prevent misclosing or misopening of isolating switches (or isolating plugs) with load; to prevent power transmission with grounding wires (or grounding switches); to prevent hanging grounding wires (or connecting grounding switches) with power on; to prevent mistaken entry into live isolation or small rooms inside the machine. In addition to the above-mentioned anti-misoperation interlocking requirements, the starter shall also be operated according to the procedures specified in the specific product standards, and the procedures may be determined by the machine or electrical interlocking device.
7.3 Temperature rise
7.3.1 Temperature rise of starter
When the starter is tested according to the conditions specified in Article 8.2.3, the temperature rise of each part of the starter shall not exceed the limit values specified in Tables 4 and 5.
Limit value of temperature rise of insulated coil in air
Grade of insulating material
7.3.2 Surrounding air temperature
Limit of temperature rise of wire in air
(electric Resistance method)
The temperature rise limits given in Tables 4 and 5 are only applicable when the ambient air temperature is within the specified values given in Article 6.1.1. 7.3.3 Main circuit temperature rise
The main circuit of the starter should be able to carry the following currents, and its temperature rise should not exceed the limit values specified in Table 5. 2. Eight-hour working system, rated thermal current: b. Uninterrupted working system, intermittent cycle working system or short-time working system, rated working current. 7.3.4 Control electromagnet winding temperature rise
When the main circuit passes the rated thermal current or rated working current, the coil winding, including the coil winding of the electrical operating valve of the electric-pneumatic starter, should be able to withstand continuous power-on at rated voltage and rated frequency (if any), and the temperature rise does not exceed the limits specified in Tables 4 and 5. Coils with special ratings, such as the tripping coil of the locking starter and some solenoid valve coils of the interlocking pneumatic starter, should be able to withstand the maximum number of operations specified for them without being damaged. 102 Electrical clearance and creepage distance
The electrical clearance and collector distance of the main circuit of the starter with pure air as insulation are shown in Table 3. Table 3 Electrical clearance and creepage distance
Rated working voltage kV
Between conductor and ground
Between conductors of different phases
Conductor to non-porous filter
Before the same-pole contact of the main circuit
Terminal
Structural requirements of the terminal
The connection between the terminal and the wire can be made by screws or other effective methods, but it must be ensured that the necessary connection pressure can be maintained for a long time. The terminal should be designed so that the wire has sufficient connection pressure between the clamped metal surfaces to compress the wire surface without damaging the wire. The structure of the terminal should ensure that the wire will not be displaced, so as to damage its work or reduce the insulation level of the given installation category. The terminal should be easy to connect with the external wire. The terminal is usually used to clamp a single wire, but it should also be considered suitable for clamping multiple wires. The screws and nuts used to tighten the wires on the terminals shall not be used to fix other parts. 7.1.3.2 Arrangement of wiring terminals
The wiring terminals designated for connection with external conductors shall be arranged clearly and easily visible under the specified optimal conditions. 7.1.3.3 Grounding terminal For the purpose of this standard, the frame, structure and fixed parts of any metal casing or component shall be electrically connected to each other and connected to the mirror grounding terminal. The electrical terminal shall be marked with a durable and secure symbol ③ or the letter symbol PE. Unless otherwise specified in the standard, the general size of the grounding stud is M12. 7.2 Casing 7.2.1 General requirements The casing of the starter must be metal (except for ventilation and exhaust) and shall not be made of mesh, fire-resistant or fire-resistant materials. It shall have a certain strength. All components of the main circuit of the starter shall be installed in a metal casing, and the protection level of the casing shall meet the relevant provisions of GB4942,2. Fume panels and doors 7.22.! When the cover and door are part of the enclosure, the cover and door shall be made of resistant metal and have the same protection level as the enclosure. 9
JB/T7116—1993
7.2.2.2 The cover and door shall not be made of mesh woven fabrics or machine-made metal meshes and similar materials. And according to the different situations in which the high-voltage main circuit room needs to be entered, the cover-type doors are divided into two categories: a.
During normal operation and maintenance, the cover (fixed cover) that does not need to be opened should not be opened, folded down or moved without using tools: the cover and door that need to be opened during normal operation and maintenance (removable cover and door) should be opened or moved without using tools and should have appropriate interlocking devices to ensure the safety of the operator. b.
When the starter enclosure cabinet adopts a metal armored or partitioned structure, the cover and door can only be opened when the main circuit part that may be touched in the isolation room is not energized.
7.2.3 Partitions and valves
When partitions and valves are used inside the starter, they shall meet the relevant provisions of GB3906. Interlocking and prevention of misoperation
7. 2. 4. 1
The starter shall have the following interlocking devices and measures to prevent misoperation, to prevent misclosing or misopening of high-voltage vacuum contactors; to prevent misclosing or misopening of isolating switches (or isolating plugs) with load; to prevent power transmission with grounding wires (or grounding switches); to prevent hanging grounding wires (or connecting grounding switches) with power on; to prevent mistaken entry into live isolation or small rooms inside the machine. In addition to the above-mentioned anti-misoperation interlocking requirements, the starter shall also be operated according to the procedures specified in the specific product standards, and the procedures may be determined by the machine or electrical interlocking device.
7.3 Temperature rise
7.3.1 Temperature rise of starter
When the starter is tested according to the conditions specified in Article 8.2.3, the temperature rise of each part of the starter shall not exceed the limit values specified in Table 4 and Table 5.
Limit value of temperature rise of insulated coil in air
Grade of insulating material
7.3.2 Surrounding air temperature
Limit of temperature rise of wire in air
(electric Resistance method)
The temperature rise limits given in Tables 4 and 5 are only applicable when the ambient air temperature is within the specified values given in Article 6.1.1. 7.3.3 Main circuit temperature rise
The main circuit of the starter should be able to carry the following currents, and its temperature rise should not exceed the limit values specified in Table 5. 2. Eight-hour working system, rated thermal current: b. Uninterrupted working system, intermittent cycle working system or short-time working system, rated working current. 7.3.4 Control electromagnet winding temperature rise
When the main circuit passes the rated thermal current or rated working current, the coil winding, including the coil winding of the electrical operating valve of the electric-pneumatic starter, should be able to withstand continuous power-on at rated voltage and rated frequency (if any), and the temperature rise does not exceed the limits specified in Tables 4 and 5. Coils with special ratings, such as the tripping coil of the locking starter and some solenoid valve coils of the interlocking pneumatic starter, should be able to withstand the maximum number of operations specified for them without being damaged. 104 Control solenoid winding temperature rise
When the main circuit passes the rated heating current or rated working current, the coil winding, including the coil winding of the electric-operated valve of the electric-pneumatic starter, should be able to withstand continuous power-on at the rated voltage and rated frequency (if any), and the temperature rise does not exceed the limits specified in Tables 4 and 5. Coils with special ratings, such as the tripping coil of the locking starter and some solenoid valve coils of the interlocking pneumatic starter, should be able to withstand the maximum number of operations specified for them without being damaged. 104 Control solenoid winding temperature rise
When the main circuit passes the rated heating current or rated working current, the coil winding, including the coil winding of the electric-operated valve of the electric-pneumatic starter, should be able to withstand continuous power-on at the rated voltage and rated frequency (if any), and the temperature rise does not exceed the limits specified in Tables 4 and 5. Coils with special ratings, such as the tripping coil of the locking starter and some solenoid valve coils of the interlocking pneumatic starter, should be able to withstand the maximum number of operations specified for them without being damaged. 10
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