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GB 25284-2010: [GB/T 25284-2010] High-voltage alternating-current automatic circuit reclosers for rated voltage from 12 kV up to and including 40.5 kV
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[GB/T 25284-2010] High-voltage alternating-current automatic circuit reclosers for rated voltage from 12 kV up to and including 40.5 kV
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Basic data | Standard ID | GB 25284-2010 (GB25284-2010) | | Description (Translated English) | [GB/T 25284-2010] High-voltage alternating-current automatic circuit reclosers for rated voltage from 12 kV up to and including 40.5 kV | | Sector / Industry | National Standard | | Classification of Chinese Standard | K43 | | Classification of International Standard | 29.130.10 | | Word Count Estimation | 55,593 | | Date of Issue | 2010-11-10 | | Date of Implementation | 2011-09-01 | | Quoted Standard | GB 1984-2003; GB 1985-2004; GB/T 2900.20; GB 2536-1990; GB 3804-2004; GB 3906-2006; GB 7674-2008; GB/T 7354-2003; GB/T 8905-1996; GB/T 11021-2007; GB/T 11022-1999; GB/T 12022-2006; GB/T 12706.1-2002; GB/T 12706.2-2002; GB/T 15166.2-2008; GB/T 16927.1-1997; GB/T 14598.10-2007; GB/T 14598.13-2008; GB/T 17626.2-2006; GB/T 17626.8-2006; IEC 61634-1995 | | Adopted Standard | IEC 62271-111-2005, MOD | | Regulation (derived from) | Announcement of Newly Approved National Standards 2010 No. 8 (No. 163 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Chinese standard applies to constant voltage 12kV 40. 5kV, frequency 50Hz, all column-type, dry WIN unipolar or multipolar high voltage AC automatic recloser. | GB 25284-2010: [GB/T 25284-2010] High-voltage alternating-current automatic circuit reclosers for rated voltage from 12 kV up to and including 40.5 kV
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High-voltage alternating-current automatic circuit reclosers for rated voltage from 12 kV up to and including 40.5 kV
ICS 29.130.10
K43
National Standards of People's Republic of China
AC high voltage 12kV ~ 40.5kV recloser
(IEC 62271-111.2005High-voltageswitchgearandcontrolgear-
Part 111. overhead, pad-mounted, dryvault, andsubmersible
alternatingcurrentsystemsupto38kV, MOD)
Published 2010-11-10
2011-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China issued
Table of Contents
Introduction Ⅴ
1 Overview 1
1.1 Scope 1
1.2 Normative References 1
Normal and special conditions 2 2
2 3 Definitions
4 Rating 4
4.1 Rated voltage (Ur) 4
4.2 Rated insulation level 4
4.3 rated frequency (fr) 4
4.4 the rated current (Ir) and temperature 4
4.5 Rated short time withstand current (Ik) 5
4.6 Rated peak withstand current (Ip) 5
4.7 Rated short duration (tk) 5
4.8, sub-gate means, and an auxiliary control circuit rated supply voltage (Ua) 5
4.9 nominal supply frequency, sub-gate circuit 5 and the auxiliary means
4.10 breaking and/or insulation rated pressure of the compressed gas source (pre) 5
4.101 rated minimum starting current 5
4.102 rated short-circuit breaking current (Isc) 5
4.103 rated short-circuit current 5
4.104 rated operating sequence 5
(Where applicable) 4.105 rated breaking line and cable charging current (Il, Ic) 6
4.106 rated time variable 6
Design and Structure 5 6
5.1 Recloser required liquid 6
5.2 recloser of claim 6 gas
5.3 Ground recloser 6
5.4 auxiliary and control equipment 6
5.5 power-operated 6
5.6 storage operations 6
5.7 does not depend on human action 6
Operation of the release 5.8 6
5.9 Low pressure and high pressure blocking means 6
5.10 nameplate 6
5.11 interlock 6
5.12 indicates the position 6
5.13 shell protection grade 6
5.14 creepage distance of 7
5.15 gases and vacuum sealing 7
Sealing liquid 7 5.16
5.17 Flammability 7
5.18 Electromagnetic compatibility (EMC) 7
5.19 X-ray 7
Corrosion 7 5.20
5.101 Hopewell single interpolar single period of Claim 7 operating at points
General operation claim 7 5.102
Housing structure 7 5.103
Yi row of holes 7 5.104
7 indicates dielectric 5.105
5.106 agencies charge indicator 7
5.107 predetermined manual operation 7
5.108 counter 10
Size lead terminals 10 5.109
5.110 Other requirements 10
6 Type Test 10
6.1 Overview 10
6.2 Insulation Test 11
6.3 Radio interference voltage (RIV) Test 12
Measuring the resistance of the main circuit 12 6.4
6.5 Temperature Rise Test 12
6.6 Short-time withstand current and peak withstand current 13
6.7 Degree of protection test 13
6.8 13 seal test
6.9 Electromagnetic compatibility (EMC) Test 13
6.101 mechanical and environmental tests 13 tests
6.102 14 switching tests
Capacity 17 closing short-circuit current of 6.103
6.104 rated short-circuit breaking current Test 17
6.105 EARTH FAULT TEST 26
Test 26 6.106 Minimum starting current
6.107 surge test 26
6.108 Time - Current Characteristic Test 27
6.109 surge withstand capability of the device electronics control (SWC) Test 28
Pressure tolerance test 6.110 29
After each test 6.102 6.111 and 6.104, the recloser state 29
7 factory test (routine test) 30
7.1 Test insulating main circuit 30
7.2 insulating auxiliary and control circuit 30 of the test
Main circuit resistance measurement 30 7.3
7.4 30 seal test
7.5 Design and appearance inspection 30
Test 30 7.101 Minimum starting current
7.102 Time - Current Characteristic Test 31
7.103 operating performance check 31
7.104 control verification test, the second wiring 31 and the auxiliary device
Testing mechanical operation 31 7.105
32 8 Selection Guidelines
8.101 Overview 32
8.102 rating selection 32
8.103 32 rating under the selected fault conditions
9 information and ask orders, tenders and orders provided with 32
9.101 Information provided with inquiries and orders 32
33 information and tender offer with 9.102
10 transportation, storage, installation, operation and maintenance rules 34
10.1 transportation, storage and installation conditions 34
10.2 Installation 34
10.3 Run 35
10.4 Maintenance 35
11 security 36
The ratio Annex A (Informative Appendix) X/R 38
A.1 time constant ratio (τcc) and X/R 38
A.2 asymmetrical fault current 38
Annex B (normative) Test operation simulation surge arrestor 40
Features added and Annex C (normative) oil overlapped portion 43 rating
C.1 Overview 43
C.2 oil rating of 43 recloser
C.2.1 rated current value is preferably 43
C.2.2 rated short-circuit breaking current value is preferably 43
C.2.3 rated short-circuit breaking current value and performance characteristics preferably 44
Reference 47
An operation unit 36 of FIG.
2 specified TRV view of two lines and delay line parameter representation 36
FIG 3 Test surge withstand circuit 37
B.1 surge test circuit 41 of FIG.
Figure B.2 typical surge voltage and current waveforms 42
Table 1 recloser preferably rated short-circuit breaking current value and performance characteristics 8
Table 2 lines and cables rated breaking current charge preferably 9
Table 3 nameplate 9
TABLE 4 times and mechanical operation of the test sequence of 14
Table 5 capacitive current switching test mode 16
Table 18 TRV list describes the various values under rated conditions 6
Table 6a) for use in the rated short-circuit breaking current overhead lines > 4kA rms phase coincides Used parameter indicates the two
The expected transient recovery voltage standard value 19
Table 6b) used in the rated short-circuit breaking current overhead lines > 4kA rms two single-phase coincides Used parameter indicates the
The expected transient recovery voltage standard value of 20
Table 6c) for use in the rated short-circuit breaking current cable system > 4kA rms phase coincides Used parameter indicates the two
The expected transient recovery voltage standard value of 21
Table 6d) used in the rated short-circuit breaking current cable system > 4kA rms two single-phase coincides Used parameter indicates the
The expected transient recovery voltage standard value 22
Table 6e) rated short-circuit used in the overhead lines and cable systems breaking current rms phase coincides Used ≤4kA two parameters
The expected transient recovery voltage standard value represented 23
Table 6f) rated short-circuit used in the overhead lines and cable systems ≤4kA breaking current RMS single-phase two parameters coincides Used
The expected transient recovery voltage standard value represented 24
Table 7 oscillations and fast transient surge test in claim 28
TABLE mechanical operation of the test load 318
Table A.1 X/R values. RMS peak factor and the coefficient 39
Preferably coincides value table C.1 oil rated current 43
Table C.2 oil coincidence rated short-circuit breaking current value is preferably 43
Table C.3 single phase oil coincidence preferably rated short-circuit breaking current value and performance characteristics of 45
Table C.4 oil-phase recloser preferably rated short circuit breaking current value and performance characteristics of 46
Foreword
All technical contents of this standard is mandatory.
This Standard is a modified IEC 62271-111.2005 (first edition) "high-voltage switchgear and control equipment --- Part 111. AC line
38kV overhead system and the type, column type, dry-room scenting, line recloser type underwater fault and breaking device. "
This standard and IEC 62271-111. The main difference is reflected in 2005.
--- Scope. According to the actual situation of China's power grid, eliminating the IEC 62271-111 content related to the rated frequency of 60Hz;
Depending on the application of the recloser, the voltage applied by the "38kV and the" to "12kV ~ 40.5kV"; applicable
The removed product types "underwater recloser type" content "fault breaking device" and relevant requirements.
--- normal and special conditions. According to GB/T 11022-1999 Chapter 2.
--- terms and definitions. IEC 62271-111 only given the definition of "unit operation", and this terminology given in standard references greatly increased,
Increasing the terms and definitions C1, C2, E1, E2, M1, M2, S1, S2 stage recloser.
--- rating. IEC 62271-111 in "the highest rated voltage" to "rated voltage" in this standard.
--- rated voltage. Removed and the rated voltage value independent of the power grid, as listed in 11022-1999 GB/T voltage
Given.
--- IEC 62271-111 given only "Lightning impulse withstand voltage", this standard is given "Rated insulation level."
--- This standard also given a "short time withstand current rating", "rated peak withstand current", "rated short duration", "rated operation
For order "," rated time parameters "and other ratings.
--- value of rated current, rated short-circuit breaking current and the like were normalized to R10 coefficient.
--- "limit temperature" employed GB/T 11022-1999 Table 3.
--- ", sub-gate means, and an auxiliary power supply voltage control loop rated" by GB/T 11022-1999 predetermined.
--- according to the provisions of GB/T 11022-1999 of Chapter 5, "Design and Structure" adds content from 5.1 to 5.20 parts. increased
"Indicated position", "shell protection", "creepage distances", "gas and vacuum seal", "seal liquid," "Electromagnetic and
Capacitive "and other requirements to include part of IEC 62271-111 in Chapter 9.
--- according to the provisions of GB/T 11022-1999, and Chapter 6, "type test" add content "Overview" section.
--- according to GB/T 11022-1999 and GB 1984-2003 6.2 rewritten insulation test.
--- deleted the "Radio interference test."
--- "Switching Test" deleted "load current switching test" content, and GB 1984 with reference to lines and cable charging current to open and close
Tests were carried out a comprehensive revision, given the provisions of Class C1 and C2 level.
--- additional type tests are. the main circuit resistance measurement, insulation test extended mechanical life test, and the auxiliary control loop,
EARTH fault current breaking test, short time withstand current and peak current withstand test, the EMC test, stress tolerance test,
Degree of protection inspection.
--- increase the "test group" and "confirmation test" and "type test report contains information" and so on.
--- increase "describes a class M1 recloser test."
--- increase "prolong mechanical life of the recloser (M2)" for the number of operating requirements and test methods.
--- increase "reference mechanical stroke characteristic (6.101.1.1)" requirements.
--- increase "environmental testing" content.
--- modification and increased content 6.109.1 and fast transient surge oscillation tests.
--- Chapter 7, "factory test" adds detailed requirements for "no-load mechanical operation test". Increasing the "main circuit resistance measurement."
--- deleted the IEC 62271-111 Chapter 8, "live test" content.
--- according to GB/T 11022-1999 increase in Chapter 8, Chapter 9, Chapter 10, Chapter 11.
--- deleted the IEC 62271-111 Annex C, Appendix D, Appendix E, Appendix F.
--- adds new appendix C, IEC 62271-111 rated current oil recloser, the rated current and the short-circuit breaking performance characteristics
Preferably the coefficient normalized by the value of R10 included.
--- increased references.
The contents of most of the provisions of this standard and IEC 62271-111.2005 same, except that the main difference has been given instructions.
This should be used with standard GB/T 11022-1999 together, unless otherwise specified in the present standard, the reference standard GB/T 11022-
1999. To simplify the representation of the same requirements, this standard reg same number and GB/T 11022-1999 used. Of these clauses
Yung supplement given under the same title references, and additional terms are numbered starting from 101.
Appendix C of this standard is normative, Annex A, Annex B is an informative Annex.
The standard proposed by China Electrical Equipment Industrial Association.
This high voltage standard by the National Standardization Technical Committee (SAC/TC65) switching devices.
This standard was drafted. Xi'an High Voltage Apparatus Research Institute, China Electric Power Research Institute switches, Beijing Huayuan limited electric power technology research
The company (Rural Power of the Electric Power Research Institute), high-voltage electrical machinery industry product quality inspection center (Shenyang), Huayi Electric Group Co., Ltd., Cooper
Nike (Ningbo) Electric Co., Ltd., Ningbo Tianan Group Co., Ltd., Zhejiang Switchgear Factory Co., Shi Naide (Beijing) medium voltage electrical
Co., Ltd., Beijing Career Distribution Automation Co., Ltd., the Quartet Huaneng Power Control System Co., Ltd., Ningbo Nature Nova automation
Equipment Co., Ltd.
The main drafters. Kou political reasons, Tian Enwen, Wu Hongyan, tour Yimin.
Participate drafters of this standard. Lvguang potential, Kong Xiangjun, Zhang heavy music, Yang Yingjie, I wish the store spring, Wu Hongbo, Shen Wei Zhong, Zhu Peilong, Zhang tree,
Su Weimin, Tan Yuanfeng, Hu Zhaoming, rice Jianqiang, Wang Liping.
AC high voltage 12kV ~ 40.5kV recloser
1 Overview
1.1 Scope
This standard applies to the rated voltage of 12kV ~ 40.5kV, the frequencies of all the column-type, dry cellar-chamber unipolar or multipolar 50Hz high voltage AC
Autorecloser flow.
Note. Dry refers to a cellar ventilation chamber is not flooded enclosed site.
Possible to simplify the present standard, the term "reclosers" instead of "high-voltage AC recloser."
1.2 Normative References
Terms of the following documents become provisions of this standard by reference in this standard. For dated reference documents, all later
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to agreements based on this standard
Whether the latest versions of these documents. For undated references, the latest version applies to this standard.
GB 1984-2003 high voltage AC circuit breaker (IEC 62271-100.2001, MOD)
GB 1985-2004 HV AC isolation and earthing switches (IEC 62271-102.2002, MOD)
GB/T 2900.20 Electrotechnical terminology voltage switchgear (neq IEC 60050)
GB 2536-1990 transformer oil (neq IEC 60296. 1982)
GB 3804-2004 3.6kV ~ 40.5kV high voltage AC load switch (IEC 60265-1.1998, MOD)
GB 3906-2006 3.6kV ~ 40.5kV AC metal-enclosed switchgear and control equipment (IEC 62271-200.2003,
MOD)
GB 7674-2008 rated voltage of 72.5kV and above the gas-insulated metal-enclosed switchgear (IEC 62271-203.2003,
MOD)
GB/T 7354-2003 partial discharge measurements (IEC 60270.2000, IDT)
GB/T 8905-1996 sulfur hexafluoride gas in electrical apparatus and detection management guidelines (neq IEC 60480. 1974, IEC 60376.
1971)
GB/T 11021-2007 heat resistance, electrical insulation classification (IEC 60085.2004, IDT)
GB/T 11022-1999 high-voltage switchgear and control equipment standard common technical requirements (eqvIEC 60694.1996)
GB/T 12022-2006 industrial sulfur hexafluoride (IEC 60376. 1971, IEC 60376A. 1973, IEC 60376B. 1974,
MOD)
GB/T 12706.1-2002 rated voltage of 1kV (Um = 1.2kV) to 35kV (Um = 40.5kV) extruded insulation power electricity
Cable Part 1 and Annex. Rated voltage of 1kV (Um = 1.2kV) to 3kV (Um = 3.6kV) cable (eqvIEC 60502-1.
1997)
GB/T 12706.2-2002 rated voltage of 1kV (Um = 1.2kV) to 35kV (Um = 40.5kV) extruded insulation power electricity
Part 2 of the cable and accessories. rated voltage 6kV (Um = 7.2kV) to 30kV (Um = 36kV) cables (eqvIEC 60502-2.
1997)
GB/T 15166.2-2008 AC high voltage fuses Part 2. limiting fuses (IEC 60282-1.2005, MOD)
GB /16927.1-1997 first portion of the high voltage test techniques T. General test requirements (eqvIEC 60060-1. 1989)
GB/T 14598.10-2007 Electrical relays Part 22-4. measuring relays and protection devices Electrical disturbance tests - Electrical Fast
Fast transient/burst immunity test (idtIEC 60255-22-4.2002)
GB/T 14598.13-2008 Electrical relays Part 22-1. Electrical disturbance tests measure relays and protection devices
1MHz burst immunity test (IEC 60255-22-1.2007, MOD)
GB/T 17626.2-2006 Electromagnetic compatibility testing and measurement techniques electrostatic discharge immunity test (IEC 61000-4-2.2001,
IDT)
GB/T 17626.8-2006 Electromagnetic compatibility testing and measurement techniques frequency magnetic field immunity test (IEC 61000-4-8.
2001, IDT)
IEC 61634.1995 using a processing voltage switchgear and control apparatus sulfur hexafluoride
2 Normal and special conditions
GB/T 11022-1999 of Chapter 2 apply.
3 Terms and Definitions
11022-1999 defined in GB/T 2900.20 and GB/T applicable, and make the following additions.
3.101
Recloser high voltage AC high-voltagealternating-currentautomaticcircuitrecloser
It can be performed automatically and in accordance with a predetermined breaking line AC superposition sequence and breaking operations overlap, and thereafter closed or automatic reset
The lock has a control function of the high-voltage switchgear protection.
3.102
Automatic operation automaticoperation
Automatically operated control means alone predetermined sequence is completed.
3.103
Unit operation unitoperation
After a breaking operation immediately following a closing operation. The last sequence of operations is also considered a breaking operation of one unit operation.
Note. See Figure 1.
3.104
Instantaneous (fast) opening operation instantaneous (fast) openingoperation
The internal control means recloser opening operation without any delay, also referred to as a fast operation.
3.105
Delay (slow) opening operation time-delay (slow) openingoperation
In the interior of the control means issues recloser opening operation signal after the elapse of a predetermined time delay, also referred to as a slow operation.
3.106
Time - current characteristic curve of time-currentcharacheristiccurve
Through-flow time of the fault recloser curve between the current and breaking.
3.107
Instantaneous (fast) time - current characteristic curve of instantaneous (fast) characheristiccurve
When the instantaneous opening operation to open the given time off flow through the flow time of the maximum value of the fault plotted - current curve. Only one product
A.
3.108
Delay (slow) time - current characteristic time-delay (slow) characheristiccurve
When delay the opening operation to open the given flow off the through-flow time average failure time plotted - current curve. A product can be
A number of.
3.109
Closing lockout latchedclosing
The contacts recloser locked in the OFF position, the closing function can not be achieved.
3.110
Sub-gate latch latchedopening
Recloser locked in the closing position of the contacts, can not achieve the function of sub-gate.
3.111
Overlap distance open-closeinterval
Refers to a recloser last contact electrode separator to the next overlap the first pole contacts the contact time between the intervals.
3.112
Reset time resettime
Timing (number) the time required for the system to return to its initial state.
3.113
Recloser trip series seriesreleaserecloser
Exceeds a predetermined value by the main circuit current flows through a coil directly or indirectly provide the energy necessary to open the main contacts of recloser.
3.114
A shunt trip recloser shuntreleaserecloser
In the case where the opening control means and the contact separating mechanism not take energy from the main circuit by the opening control means releases some
The energy storage device of the recloser opens the contacts.
3.115
The hydraulic control recloser hydraulicoperatedrecloser
By the hydraulic mechanism to control the minimum starting current, time - current characteristic, the order of operations, the overlap distance and the number of recloser operations.
3.116
The electronic control recloser electronicoperatedrecloser
Using an electronic circuit to control the minimum starting current, time - current characteristic, the order of operations, the overlap distance and the number of recloser operations.
3.117
The minimum starting current minimumtrippingcurrent
Coincidence reliably starting the main circuit to achieve the minimum current value of breaking.
3.118
C1 stage recloser classC1recloser
One kind of coincidence, a weight having a low probability of breakdown type test verification predetermined capacitive current breaking process.
3.119
C2-level recloser classC2recloser
One kind of coincidence, a weight having a very low probability of breakdown type test verification predetermined capacitive current breaking process.
3.120
E1 stage recloser classE1recloser
E2 level is within the scope which does not belong to the coincidence 3.121 definition, having substantially the life of the electrical recloser. The basic electrical life is
It means a unit operation in Table 1, with parameters under the conditions specified in Table C.3 and C.4 table corresponding to column 6, column 8, column 10, column 11 of the
As the number of 8,4,4,16 respectively.
3.121
E2 stage recloser classE2recloser
One - coincidence is, during its expected service life, the main circuit breaking with parts require no maintenance, other parts require little
Maintenance (extended electrical life of the recloser) electrically life in full compliance with Table 1, under the conditions specified in the parameter table with Table C.3 and C.4
Number of unit operations.
Note. Few of lubrication maintenance means, if applicable, make-up gas and clean the outer surface.
3.122
Class M1 recloser classM1recloser
M2 in the stage a non-visible part of the recloser 3.123 definition, has a substantially mechanical life (mechanical operations of type 2000
Test) recloser.
3.123
M2 level recloser classM2recloser
The special requirements for frequent operation and design requirements and limited by a specific maintenance type test (having an extended
It coincides mechanical life, a mechanical operation type test 10,000 times) authentication recloser.
Note. For electrical life, mechanical life and capacitive current breaking apart during re-breakdown probability, a combination of different levels of overlap is possible. For these heavy
Clutch design, logo different grades of the combination should be in alphabetical order, for example, C1-M2.
3.124
Recloser stage S1 classS1recloser
Network cable connected recloser, under normal circumstances, the recloser does not apply to this case.
3.125
Recloser stage S2 classS2recloser
For aerial lines recloser.
4 Ratings
Ratings should include the following items.
a) Rated voltage (Ur);
b) rated insulation level;
c) rated frequency (fr);
d) rated current (Ir);
e) rated short time withstand current (Ik);
f) Rated peak withstand current (Ip);
g) rated short duration (TK);
h) closing and opening means, auxiliary and control circuits rated supply voltage (Ua);
i) breaking and/or insulation rated pressure of the compressed gas source (pre);
j) the nominal minimum starting current;
k) breaking the rated short-circuit current (Isc);
l) the rated short-circuit current;
m) lines and cables rated charging current (Il, Ic);
n) of rated operation sequence.
4.1 Rated voltage (Ur)
GB/T 11022-1999 4.1 apply.
4.2 Rated insulation level
GB/T 11022-1999 4.2 apply.
4.3 rated frequency (fr)
GB/T 11022-1999 of 4.3 applicable standard recloser nominal frequency is 50Hz.
4.4 rated current (Ir) and temperature rise
GB/T 11022-1999 applicable in 4.4, and added as follows.
Preferably coincides rated current value. 400A, 630A, 1250A, 3150A.
NOTE. Oil coincidence rated current preferred values listed in Appendix C.
4.5 Rated short time withstand current (Ik)
GB/T 11022-1999 4.5 are applicable.
4.6 Rated peak withstand current (Ip)
GB/T 11022-1999 of 4.6 apply.
4.7 Rated short duration (tk)
GB/T 11022-1999 of 4.7 apply, and the following addition.
For the series does not need to coincide with a predetermined tripping duration of the rated short-circuit.
4.8, sub-gate means, and an auxiliary control circuit rated supply voltage (Ua)
GB/T 11022-1999 of 4.8 apply.
Note 1. closing coil, and the auxiliary trip device connected to the proposed long-term DC power supply and the negative should be directly connected to the control bus so that the electrolytic corrosion
The minimum loss.
Note 2. Only the battery when the device is located in or take measures to ensure that there is sufficient cross-section between the conductor and a control terminal of the battery, it is recommended to use 24V
Or tripping means, and an auxiliary closing function of 48V.
Note 3. relays, motors and other auxi...
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