Some standard content:
Mechanical Industry Standard of the People's Republic of China
DW914 Series Marine Universal Air Circuit Breakers JB/T6453-1992
This standard refers to IEC92-101 "Marine Electrical Equipment: Definitions and General Requirements", IEC92-102 "Marine Electrical Equipment: System Design-Protection" and IEC947-2 "Low-voltage Switchgear and Control Equipment Part 2: Circuit Breakers". 1 Subject Content and Scope of Application
This standard specifies the technical requirements, test methods and inspection rules for DW914 series marine universal air circuit breakers. This standard applies to DW914 series marine universal air circuit breakers (hereinafter referred to as circuit breakers) with a rated current of 4000A and below, a rated working voltage of 660V AC and below (rated frequency of 50Hz or 60Hz), and a rated working voltage of 440V DC and below. 2 Reference standards
National standards
National standards
GB2900.18
GB2423.16
GB2423.17
GB4026
GB7094
GB4205
General rules for low-voltage switchgear and controlgear
Basic test methods for low-voltage electrical appliances
Low-voltage switchgear and controlgear
Marine low-voltage air circuit breakers
Part 2
Electrical terminologyBasic terminology
Electrical terminologyLow-voltage electrical appliances
Low-voltage circuit breakers
Basic environmental test procedures for electrical and electronic productsTest A; Low-temperature test methods|| tt||Basic environmental test procedures for electric and electronic products Test B: High temperature test method
Test Db: Alternating damp heat test method
Basic environmental test procedures for electric and electronic products Basic environmental test procedures for electric and electronic products Test J: Mildew test method Basic environmental test procedures for electric and electronic products Test Ka: Salt spray test method Identification of electrical wiring terminals and marking wiring terminals with alphanumeric symbols General rules Vibration (sinusoidal) test method for marine electrical equipment Standard movement direction of operating parts for controlling electrical equipment 3 Terms, symbols, and codes
3.1 Terms
3.1.1 This standard specifies the following main terms and their meanings: a. Priority pre-alarm
Contact signal that precedes the long-delay action under the set current within the specified range. b. Capacitor release device
A device that uses the energy storage function of the capacitor to disconnect the circuit breaker once through the shunt release within a period of time when the operating power disappears. 3.1.2 Except as provided in 3.1.1, this standard refers to the relevant terms and definitions in GB2900.1 and GB2900.18. 3.2 Symbols and codes
3.2.1 Symbols
U.: Rated working voltage;
Approved by the Ministry of Machinery and Electronics Industry on August 6, 1992 264
Implementation on January 1, 1993
Ui: Rated insulation voltage;
U.: Rated control circuit voltage;
U.: Rated control power supply voltage;
U.: Steady-state recovery voltage after breaking;
I: Rated current of circuit breaker frame grade;
I.: Rated current of circuit breaker;
I.: Rated working current (auxiliary contact);Ia: Conventional heating current;
I. : Rated current of releaser;
In: Setting current of long-time delay releaser;
In: Setting current of short-time delay releaser;
Is: Setting current of instantaneous releaser;
Ip: Setting current of priority warning releaser;Ip: Setting current of ground protection releaser;Ial: Rated operating short-circuit breaking capacity (current);JB/T6453—1992
Ia2: Rated operating short-time delay breaking capacity (current);Ie1: Rated ultimate short-circuit breaking capacity (current);Ies?: Rated ultimate short-time delay breaking capacity (current);I: Rated short-time withstand current;
Ta.$: Time for current to rise to 95% stable value;Db: Alternating damp heat test;
CTI; Comparative tracking index;
AC: Alternating current;
DC: Direct current.
3.2.2 Code
The category codes used in this standard are as follows:
A: non-selective protection;
B: selective protection.
AC-15: control AC electromagnet load;
DC～13: control DC electromagnet load. 4 Circuit breaker model
Meaning of circuit breaker model
See Table 1 for circuit breaker models.
Frame grade rated current
Circuit breaker dimensions and installation dimensions
JB/T6453—1992
Circuit breaker model
DW914—630
DW914—1000
DW914-1600
DW914-2000
DW914—2000G||tt| |DW914—3200
DW914—3200G
DW914-4000
Neutral pole
High-break type code
Circuit breaker frame grade rated current
Design serial number
Marine code
Universal circuit breaker
The overall dimensions and installation dimensions of the circuit breaker shall comply with the requirements of Figures 1 to 4 and Table 2. 266
DW914—630N
DW914—1000N
DW914—1600N
DW914—2000N
DW914—2000GN
DW914—3200N
DW914—320CGN | |tt | 92
Rated insulation voltage U
Rated working voltage
Circuit breaker frame grade rated current 1
Conventional thermal current
Circuit breaker rated current I.
Rated operating short-circuit breaking
capacity (current) lal
Rated short-circuit making current kA
Rated operating short-time breaking
breaking capacity (current) la
Rated short-circuit making current
Rated short-time withstand current
Overall dimensions
Width, depth, height
Circuit breaker characteristics
Circuit breaker type
Two-pole;
Three-pole;
Four-pole.
0.15~0.25
T≤15ms
Delay 0.42s
JB/T6453—1992
Main circuit ratings and limit values
DW914-
pw914-
660,440,380
440，250
50/105
DW914-
50/105
65/143
418×440×487(4P)
333X440×487(3P)
435×550×50 5 (4P) | | tt | | 435X560 × 505 (4P) | 440, 250
50/105
65/143
65/143
70/154
626380
440, 250
50/105
65/143
65/143
50/105
85/187| |tt||85/187
738X542X575(4P)
578×542×575(3P)
496X477×575(3P)
DW914-||tt ||660,440
4 40, 250
50/105
85/187
120/264bzxZ.net
782×707
670X632X645(4P)|782X707×655(4P )X655(4P)540X632X645(3P)622×707×655(3P)622×707X655(3P)
Current type
AC: 50Hz or 60Hz;
DC. || tt||Arc extinguishing medium
Air.
Closing mode
Manual energy storage manual closing;
Manual energy storage manual closing;
Electric energy storage electric closing;
JB/T 6453— 1992
Electromagnet closing (with manual closing handle for maintenance). Disconnection mode
Manual disconnection;
Shunt disconnection;
Undervoltage disconnection ;
Overcurrent disconnection.
Installation method
Fixed type;
Drawer type.
Maintenance regulations
No maintenance required.
Specified use
For power distribution;
For protection of generators.
6.2 Main circuit rated values and limit values
6.2.1 The definitions of the main circuit voltage, current rated values and limit values shall be in accordance with Article 5.3 of JB5796, and their specific values shall comply with the provisions of Table 2. 6.2.2 Rated duty
The rated duty of the circuit breaker is long-term duty. 6.3
Control circuit characteristics
Control circuit characteristics are shown in Table 3.
Table 3 Control circuit characteristics
Control circuit
Electromagnet closing
Motor energy storage closing\
Note: 1) AC440 and AC380 are equipped with power transformer. 6.4 Auxiliary circuit characteristics
The auxiliary contact ratings are shown in Table 4.
Rated control power supply voltage U.
AC440(60Hz), 380, 220（50Hz)DC220
AC440(60Hz), 380, 220(50Hz)
Rated Insulation
Voltage
Auxiliary contact usage categories are shown in Table 5.
Current types
Making and breaking capacities are shown in Table 6.
Use category
JB/T6453—1992
Table 4 Auxiliary contact ratings
Rated work
Auxiliary contact use category||tt| |Use category code
AC—15
Rated working
Current g
Conventional heating
Rated frequency
Control AC electromagnet load ( Greater than 72VA) to control DC electromagnet load
Auxiliary contact connection and disconnection capacity
Normal use conditions
<300ms
Mechanical life and electrical life. ||tt| |The service life of the auxiliary switch is the same as that of the circuit breaker. 6.4.5 The auxiliary contacts and fuses should be coordinated. The short-circuit protection device of the auxiliary contact adopts a fuse; a.
<300ms
Abnormal use conditions
<300ms
<300ms| |tt||The auxiliary contact can withstand the expected short-circuit current value of 1000A (expressed as the effective value of the AC component for AC) within the fusing time under the conditions specified in Article 10.1.2.4.
6.5 Use Category||tt| |The use category of the circuit breaker is shown in Table 7.
Table 7 Use Category of Circuit Breaker
Use Category
Selective Application
In the case of short circuit, the circuit breaker is not clear It is used as a selective protection for another short-circuit protection device connected in series on its load side, that is, there is no artificial short delay.
In the case of a short circuit, the circuit breaker is clearly used to protect another short-circuit protection device connected in series on its load side. Selective protection of short-circuit protection devices, that is, artificial short delay.
6.6 Release types and characteristics
6.6.1 Type
6.6.1.1 Shunt release
General type;
With capacitor release
6.6.1.2 Undervoltage release
Time-delay type;
Time-delay type.
6.6.1.3 Overcurrent release||tt ||6.6.1.3.1 Classification by purpose
a. For power distribution;
b. For generator protection.
6.6.1.3.2 Classification by structure||tt| |a. Electronic type;
Electromagnetic type.
6.6.1.3.3
Classification by protection characteristics
Long delay;
Short delay;
Instantaneous;
Priority Pre-alarm;
Ground protection.
Release characteristics
JB/T64531992
See Table 8 for the rated values of shunt and undervoltage releases. Table 8 Rated values of shunt and undervoltage releases
Release
Undervoltage
6.6.2.2 Overcurrent release
Rated control power supply voltage U .
AC220，380(50Hz)
(60 Hz)
DC220，110，48，24
6.6.2.2.1 Rated current of overcurrent release I. As follows: Rated voltage U.
AC220,380(50Hz)
AC440(60Hz)
DC110，220
100、160、250、400、630、800 , 1000, 1250, 1600, 2000, 3200, 4000A. 6.6.2.2.2 Setting range of electronic overcurrent release See Table 9. Table 9 Setting range of electronic overcurrent release Long delay
Application category
Protect generator
Current setting
6. 6. 2. 2. 3
Time setting
Short delay
Current Set
Ia/I.
Time setting
120~420
120~420
Current setting
For the setting values of electromagnetic instantaneous overcurrent release, see Table 10. Pre-alarm
Current setting
0.82~0.96
Time setting
Ground protection
Current setting
Time setting
120~4201 The definition of the rated value and limit value of the voltage and current of the main circuit shall be in accordance with Article 5.3 of JB5796, and its specific values shall comply with the provisions of Table 2. 6.2.2 Rated working system
The rated working system of the circuit breaker is the long-term working system. 6.3
Control circuit characteristics
Control circuit characteristics are shown in Table 3.
Table 3 Control circuit characteristics
Control circuit
Electromagnet closing
Motor energy storage closing\
Note: 1) AC440 and AC380 are equipped with power transformer. 6.4 Auxiliary circuit characteristics
Auxiliary contact ratings are shown in Table 4.
Rated control power supply voltage U.
AC440(60Hz), 380, 220（50Hz)DC220
AC440(60Hz), 380, 220(50Hz)
Rated insulation
voltage female
Auxiliary contact usage category see Table 5.
Current type
Connection and breaking capacity see Table 6.
Application category
JB/T6453—1992
Table 4 Auxiliary contact ratings
Rated work
Auxiliary contact application category
Application category code
AC—15
Rated work
Current g
Conventional heating
Rated frequency
Control of AC electromagnet load (greater than 72VA)Control of DC electromagnet load
Auxiliary contact connection and disconnection capacity
Normal use conditions
<300ms
Mechanical life and electrical life.
The auxiliary switch life times are the same as those of the circuit breaker. 6.4.5 Coordination of auxiliary contacts and fuses. The short-circuit protection device of the auxiliary contact adopts a fuse; a.
<300ms
Abnormal use conditions
<300ms
<300ms
The auxiliary contact can withstand the expected short-circuit current value of 1000A (for AC, the AC component is expressed as the effective value) within the fuse time under the conditions specified in Article 10.1.2.4.
6.5 Use category
The use category of the circuit breaker is shown in Table 7.
Table 7 Use category of circuit breaker
Use category
Selective application
In the case of short circuit, the circuit breaker is not explicitly used as a selective protection for another short-circuit protection device connected in series on its load side, that is, there is no artificial short delay.
In the case of short circuit, the circuit breaker is explicitly used as a selective protection for another short-circuit protection device connected in series on its load side, that is, there is an artificial short delay.
6.6 Release type and characteristics
6.6.1 Type
6.6.1.1 Shunt release
General type;
With capacitor release device.
6.6.1.2 Undervoltage release
Time-limited type;
Delayed type.
6.6.1.3 Overcurrent release
6.6.1.3.1 Classification by purpose
a. For power distribution;
b. For generator protection.
6.6.1.3.2 Classification by structure
a. Electronic type;
Electromagnetic type.
6.6.1.3.3
Classification by protection characteristics
Long delay;
Short delay;
Instantaneous;
Priority pre-alarm;
Ground protection.
Release characteristics
JB/T64531992
See Table 8 for the rated values of shunt and undervoltage releases. Table 8 Rated values of shunt and undervoltage releases
Release
Undervoltage
6.6.2.2 Overcurrent release
Rated control power supply voltage U.
AC220, 380 (50Hz)
(60 Hz)
DC220, 110, 48, 24
6.6.2.2.1 Overcurrent release rated current I. As follows: Rated voltage U.
AC220,380(50Hz)
AC440(60Hz)
DC110,220
100,160,250,400,630,800,1000,1250,1600,2000,3200,4000A. 6.6.2.2.2 Setting range of electronic overcurrent release is shown in Table 9. Table 9 Setting range of electronic overcurrent release Long delay
Application category
Protection of generator
Current setting
6. 6. 2. 2. 3
Time setting
Short delay
Current setting
Ia/I.
Time setting
120~420
120~420
Current setting
For the setting values of electromagnetic instantaneous overcurrent release, see Table 10. Priority pre-alarm
Current setting
0.82~0.96
Time setting
Ground protection
Current setting
Time setting
120~4201 The definition of the rated value and limit value of the voltage and current of the main circuit shall be in accordance with Article 5.3 of JB5796, and its specific values shall comply with the provisions of Table 2. 6.2.2 Rated working system
The rated working system of the circuit breaker is the long-term working system. 6.3
Control circuit characteristics
Control circuit characteristics are shown in Table 3.
Table 3 Control circuit characteristics
Control circuit
Electromagnet closing
Motor energy storage closing\
Note: 1) AC440 and AC380 are equipped with power transformer. 6.4 Auxiliary circuit characteristics
Auxiliary contact ratings are shown in Table 4.
Rated control power supply voltage U.
AC440(60Hz), 380, 220（50Hz)DC220
AC440(60Hz), 380, 220(50Hz)
Rated insulation
voltage female
Auxiliary contact usage category see Table 5.
Current type
Connection and breaking capacity see Table 6.
Application category
JB/T6453—1992
Table 4 Auxiliary contact ratings
Rated work
Auxiliary contact application category
Application category code
AC—15
Rated work
Current g
Conventional heating
Rated frequency
Control of AC electromagnet load (greater than 72VA)Control of DC electromagnet load
Auxiliary contact connection and disconnection capacity
Normal use conditions
<300ms
Mechanical life and electrical life.
The auxiliary switch life times are the same as those of the circuit breaker. 6.4.5 Coordination of auxiliary contacts and fuses. The short-circuit protection device of the auxiliary contact adopts a fuse; a.
<300ms
Abnormal use conditions
<300ms
<300ms
The auxiliary contact can withstand the expected short-circuit current value of 1000A (for AC, the AC component is expressed as the effective value) within the fuse time under the conditions specified in Article 10.1.2.4.
6.5 Use category
The use category of the circuit breaker is shown in Table 7.
Table 7 Use category of circuit breaker
Use category
Selective application
In the case of short circuit, the circuit breaker is not explicitly used as a selective protection for another short-circuit protection device connected in series on its load side, that is, there is no artificial short delay.
In the case of short circuit, the circuit breaker is explicitly used as a selective protection for another short-circuit protection device connected in series on its load side, that is, there is an artificial short delay.
6.6 Release type and characteristics
6.6.1 Type
6.6.1.1 Shunt release
General type;
With capacitor release device.
6.6.1.2 Undervoltage release
Time-limited type;
Delayed type.
6.6.1.3 Overcurrent release
6.6.1.3.1 Classification by purpose
a. For power distribution;
b. For generator protection.
6.6.1.3.2 Classification by structure
a. Electronic type;
Electromagnetic type.
6.6.1.3.3
Classification by protection characteristics
Long delay;
Short delay;
Instantaneous;
Priority pre-alarm;
Ground protection.
Release characteristics
JB/T64531992
See Table 8 for the rated values of shunt and undervoltage releases. Table 8 Rated values of shunt and undervoltage releases
Release
Undervoltage
6.6.2.2 Overcurrent release
Rated control power supply voltage U.
AC220, 380 (50Hz)
(60 Hz)
DC220, 110, 48, 24
6.6.2.2.1 Overcurrent release rated current I. As follows: Rated voltage U.
AC220,380(50Hz)
AC440(60Hz)
DC110,220
100,160,250,400,630,800,1000,1250,1600,2000,3200,4000A. 6.6.2.2.2 Setting range of electronic overcurrent release is shown in Table 9. Table 9 Setting range of electronic overcurrent release Long delay
Application category
Protection of generator
Current setting
6. 6. 2. 2. 3
Time setting
Short delay
Current setting
Ia/I.
Time setting
120~420
120~420
Current setting
For the setting values of electromagnetic instantaneous overcurrent release, see Table 10. Priority pre-alarm
Current setting
0.82~0.96
Time setting
Ground protection
Current setting
Time setting
120~420Electronic type;
Electromagnetic type.
6.6.1.3.3
Classification by protection characteristics
Long delay;
Short delay;
Instantaneous;
Priority pre-alarm;
Ground protection.
Release characteristics
JB/T64531992
See Table 8 for the rated values of shunt and undervoltage releases. Table 8 Rated values of shunt and undervoltage releases
Release
Undervoltage
6.6.2.2 Overcurrent release
Rated control power supply voltage U.
AC220, 380 (50Hz)
(60 Hz)
DC220, 110, 48, 24
6.6.2.2.1 Overcurrent release rated current I. As follows: Rated voltage U.
AC220,380(50Hz)
AC440(60Hz)
DC110,220
100,160,250,400,630,800,1000,1250,1600,2000,3200,4000A. 6.6.2.2.2 Setting range of electronic overcurrent release is shown in Table 9. Table 9 Setting range of electronic overcurrent release Long delay
Application category
Protection of generator
Current setting
6. 6. 2. 2. 3
Time setting
Short delay
Current setting
Ia/I.
Time setting
120~420
120~420
Current setting
For the setting values of electromagnetic instantaneous overcurrent release, see Table 10. Priority pre-alarm
Current setting
0.82~0.96
Time setting
Ground protection
Current setting
Time setting
120~420Electronic type;
Electromagnetic type.
6.6.1.3.3
Classification by protection characteristics
Long delay;
Short delay;
Instantaneous;
Priority pre-alarm;
Ground protection.
Release characteristics
JB/T64531992
See Table 8 for the rated values of shunt and undervoltage releases. Table 8 Rated values of shunt and undervoltage releases
Release
Undervoltage
6.6.2.2 Overcurrent release
Rated control power supply voltage U.
AC220, 380 (50Hz)
(60 Hz)
DC220, 110, 48, 24
6.6.2.2.1 Overcurrent release rated current I. As follows: Rated voltage U.
AC220,380(50Hz)
AC440(60Hz)
DC110,220
100,160,250,400,630,800,1000,1250,1600,2000,3200,4000A. 6.6.2.2.2 Setting range of electronic overcurrent release is shown in Table 9. Table 9 Setting range of electronic overcurrent release Long delay
Application category
Protection of generator
Current setting
6. 6. 2. 2. 3
Time setting
Short delay
Current setting
Ia/I.
Time setting
120~420
120~420
Current setting
For the setting values of electromagnetic instantaneous overcurrent release, see Table 10. Priority pre-alarm
Current setting
0.82~0.96
Time setting
Ground protection
Current setting
Time setting
120~420
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