CR193 Vacuum Contactor
CR193 真空接触器
User Manual
⽤⼾⼿册
Caution!
Please read the manual carefully before installation and operation of the contactor:
Installation and operation of the contactor must comply with the requirements of this manual.
The contactor shall be applied under normal operating conditions indoors.
Any operation and maintenance to the contactor must be performed by well-trained
professional electricians.
Operating contactor in the conditions beyond its rated parameters is forbidden.
Always pay attention to any markings of the contactor.
Ensure the interlocking conditions of the contactor, as well as the applicability and safety of the
working regulation.
Any maintenance with Switchgear or Secondary circuit powered-on is strictly forbidden.
Ensure protecting the contactor from any external impact, otherwise the device will be damaged.
Any irregular operation may damage the device, and even cause serious accident.
This manual should be placed in a convenient place.
Professional personnel should be responsible for the safety management of circuit breakers.
Contents
1.Overview .......................................................................................................................................... 1
2. Application standard ....................................................................................................................... 1
3. Technical data ................................................................................................................................. 2
4. Product structure ............................................................................................................................ 4
5. Working principle ............................................................................................................................ 5
6. Electrical schematic diagram .......................................................................................................... 13
7. Dimensions ................................................................................................................................... 16
8. Maintenance period ....................................................................................................................... 17
9. Maintenance and inspection ........................................................................................................... 17
10. Failure analysis and treatments ..................................................................................................... 19
11. Spare parts .................................................................................................................................. 21
1
1.Overview
This manual provides the maintenance requirements and working specifications of CR193 vacuum
contactor and fuse vacuum contactor combination apparatus to ensure safety and extend its service life.
This manual is applicable to CR193 vacuum contactor (hereinafter referred to as contactor) and fuse vacuum
contactor combination apparatus (hereinafter referred to as combination apparatus).
2. Application standard
China national standards:
GB/T 14808 High-voltage alternating current contactors and contactor-based
motor-starters
GB/T 11022 Common specifications for high-voltage switchgear and controlgear
standards
GB/T 15166.2 High-voltage alternating-current fuses Part 2: Current-limiting fuses
GB/T 50150 Electric equipment installation engineering standard for hand-over test
of electric equipment
GB/T 311.1 Insulation co-ordination-Part 1: Definitions, principles and rules
GB/T 16927.1 High-voltage test techniques Part 1. General test requirements
GB/T 13384 General specifications for packing of mechanical and electrical product
IEC standards:
IEC 60470 High-voltage alternating current contactors and contactor-based
motor-starters
IEC 60694 Common specifications for high-voltage switchgear and controlgear
standards
IEC 60632-1 High-voltage motor starters Part1:Direct-on-line(full voltage) a. c. starters
IEC 60282-1 High-voltage fuses Part 1: Current-limiting fuses
IEC 60071-1 Insulation co-ordination. Part 1 : Definitions, principles and rules
Fuses size and Impactor type shall comply with DIN 43625 and BS 2692 standards. Fuse electrical
properties shall comply with IEC 60282 and GB/T 15166.2 standards.
2
3. Technical data
3-1 The technical parameters of Vacuum contactor and combination apparatus (table 1)
Table 1
Item Unit
Numerical value
Vacuum
contactor combination apparatus
Rated voltage kV 12 7.2 12
Rated
insulation
level
Power frequency
Withstand voltage(1min)
kV
42 32 42
Lightning impulse
withstand voltage (peak) 75 60 75
Rated frequency Hz 50 50
Rated current
Transformer
A 400
6.3~250 6.3~224
Motor 25~315 25~200
Short-time withstand current (4s) kA 4 6.3 /
Rated peak withstand current kA 10 16 /
Current overload tolerance(1s) kA 6 9.5 /
Rated short-circuit breaking current kA 4 6.3 50
Rated short-circuit making current kA 4 6.3 /
Rated junction current kA / 3.2
Rated service mode Continuing service
Continuing service
Mechanical
endurance
Mechanical holding
10000
cycles
30 30
Electrical holding
10000
cycles
30 30
Auxiliary contact 6a+6b 6a+6b
Loop resistance (each phase) μΩ ≤150 ≤200*
Weight kg 46 98
Note: * fuse resistance not included.
3
3-2 Technical parameters of control circuit (table 2)
Table 2
Item Mechanical holding Electrical holding
Rated operating voltage AC110 DC110
AC220
DC220
AC110 DC110
AC220
DC220
Closing operating current (A) 9 9 4.5 4.5 9 9 4.5 4.5
Closing holding current (A) / / / / 1 1 0.5 0.5
Opening operating current (A)
12 12 6 6 / / / /
Rated working voltage range
Closing:85%-110% rated operating
voltage
Opening:65%-120% rated operating
voltage
Closing:85%-110% rated operating
voltage
Operating frequency (cycles/h)
600 600
Notes: the value in this table is approximate value.
3-3 Mechanical characteristic parameters (table 3)
Table 3
No.
Item Unit
Value
Vacuum
contactor combination apparatus
1 Contacts gap mm 6.0±1.0 6.0±1.0
2 Over travel mm 2.5±0.5 2.5±0.5
3 Interphase center distance mm 150±1.0 150±1.0
4 Synchronization of 3-phase contact ms ≤2 ≤2
5 Contact closing bounce time ms ≤2 ≤3
6 Closing time ms ≤100*（180） ≤100*（180）
7 Opening
time
Mechanical holding ms ≤70*（160） ≤70*（160）
Electrical holding ms ≤100* ≤130*
Notes: * actuation time of relay not included.
4
4. Product structure
4-1 Main structure of vacuum contactor
●
Fixed
The vacuum contactor (insulated frame) is mainly composed of vacuum interrupter, insulating frame,
metal base, insulating warping plate, electromagnetic operating mechanism, etc.
4-2 The structure of combined electrical apparatus is mainly composed of fuse, vacuum contactor and
chassis car
●
Handcart
5
5. Working principle
5.1 Working principle of fuse vacuum contactor combination apparatus
CR193 vacuum contactor is a kind of high voltage electrical apparatus which is mainly used to switch
on and off the load current. The power circuit can be connected and broken by vacuum interrupter.
The fuse vacuum contactor combination device is mainly composed of high-voltage current limiting
fuse, contactor and chassis car. Its basic working principle is: the normal start and stop of load depends on
the contactor, which also has the task of breaking part of load current, making full use of the long mechanical
life and frequent operation of the contact, and the more serious load current or short circuit The current
breaking task is completed by high voltage current limiting fuse, which makes full use of the current limiting
characteristics of fuse and the advantage of large expected breaking current. Combine and connect the two
parts, connect them to the switch cabinet in the way of plum contact, and connect the secondary control
circuit of the switch cabinet through the secondary plug. They can cooperate with each other, give full play
to their advantages and avoid disadvantages, so that the F-C circuit has some characteristics different from
other equipment, such as small rated current, large breaking current, frequent operation and long
mechanical life.
Closing
When the contactor receives the closing command, for the mechanical vacuum contactor, the coil of
the closing relay is energized, the normally open contact is closed, the circuit of the closing coil is energized,
and the operating mechanism acts, that is, the closing electromagnet under the action of electromagnetic
force drives the insulation rocker to rotate clockwise, and the screw of vacuum interrupter is pushed to
make linear motion through the contact pressure spring. Then, the moving contact and the fixed contact
are closed, at the same time, the contact spring generates the required contact stroke (i.e. overtravel), so
as to ensure the required pressure between the moving contact and the fixed contact.
For the mechanical vacuum contactor, there is a mechanical closing latch to make the contactor in the
closing state.
For the electric vacuum contactor, the electric holding module outputs stable current to keep the
closing state.
For combined electrical apparatus, three-phase fuse must be installed, and it can complete the closing
action only when it meets the unfused state.
Opening
When the contactor receives the opening command, for the mechanical vacuum contactor, the opening
relay coil is energized, the normally open contact is closed, the opening coil circuit is on, and the opening
tripping mechanism acts, that is, under the action of electromagnetic force, the opening electromagnet
drives the roller out of the lock, the opening spring drives the electromagnetic operation mechanism to act,
and drives the insulation rocker to rotate anticlockwise. Pull the bolt of the arc extinguishing chamber to
separate the moving contact from the static contact at a proper speed. The buffer pad will work near the
final opening position and absorb the residual kinetic energy of the opening, thus completing the whole
opening process.
6
For the electrical holding vacuum contactor, there is no unlocking process, the electric holding module
loses power and the contactor opens.
Manual opening
The mechanical vacuum contactor and combined electrical apparatus have the function of manual
opening operation: directly push the manual opening lever of vacuum contactor, and the manual opening
lever drives the opening electromagnet, and drives the roller to break away from the lock, so as to realize
the manual opening (Fig. 1 and Fig. 2).
The combined electrical apparatus with electrical holding also has the function of manual opening
operation, but it needs to be realized through the switch cabinet.
Fig. 4
Fig. 1
Fig. 5
Fig. 2
5.2 Working principle of fuse
Working principle of Fuse impactor (Fig. 3)
The fuse has a spring striker system. The system is connected with the fuse. When the fuse is fused,
the pressure spring striking pin is ejected from the end face of the contact cap of the high-voltage fuse. The
striker will act as the actuating part and visual display device of the fuse release device.
7
Fig. 3
Working principle of fuse linked tripping mechanism (Fig. 4)
Fig. 4
The linkage tripping mechanism of fuse is composed of a pin, a bracket of interlocking mechanism,
and a spring.
When the fuse is not installed, the linkage mechanism bracket will drive the connecting rod under the
action of spring, which makes the transmission rod push the opening electromagnet, and the mechanism
cannot keep closing state. Therefore, if one phase fuse is not installed, the contactor cannot be closed,
which can prevent the contactor from closing in the case of lack of phase.
When the fuse is blown, the impactor will push the connecting rod. When the connecting rod pulls up
the fuse connector, it will rotate the opening connector and push the opening rod to release and unlock the
8
switch. The three-phase fuse connector and one opening connector are fixed on a square shaft. Even if only
one phase fuse is blown, the contactor will trip in linkage. When three-phase fault occurs, the action error
time should be considered. If only one phase fuse is fused, even if the appearance of the other phase fuses
is very good, all fuses should be replaced due to over-current, so as to ensure that the fuses are not replaced
with electricity. The fuse in normal operation shall be inspected regularly.
5.3 Replace Fuse(Fig. 5,6,7)
When it is necessary to install and replace the fuse: insert the fuse with a screw driver, press down the
support of the interlocking mechanism to the bottom (if there is no such action, when inserting the fuse, the
fuse will collide with the bracket, affecting the interlocking mechanism), and insert the fuse into the
conductive base (pay attention to the installation direction of the fuse, and insert the contact pin end into
the conductive base). After the fuse is installed in place, put the rubber washer into the fuse sleeve and
push the fuse holder forward. Clockwise is the rotation direction and counterclockwise is the rotation out
direction. When installed in place, the opening and closing arrows of the fuse sleeve shall be at the top
position. Insert the sleeve positioning plate into the gap between the sleeve and the fuse holder and lock it.
vice versa.
Fig. 5
Fig. 6 Fig. 7
9
5.4 Working principle of the chassis (Fig. 8)
Fig.8
1. roller 2. closing interlocking plate 3. fixed locking plate
4. supporting beam 5. handle 6. operation position lock
7. handle socket 8. position switch 9. screw
10. earthing switch interlocking piece 11. test position lock
The support beam (4) of the chassis truck is fixed on the switch cabinet through the fixed lock plate
(3), and the screw (9) is installed on the support beam, which can be rotated and connected with the base
through the nut (the nut is fixed on the base). When the screw is rotated, the chassis will move forward
and backward along the screw direction to drive the contactor body to advance and exit; at the front end
and rear end of the turnover plate (2), there are lock locks of the screw (6 is the working position latch,
and 11 is the test position latch).
Push-in and pull-out of the chassis
When the contactor and grounding switch are in the opening state and the grounding interlock is in
the reset state, the screw can be freely rotated to drive the chassis and the contactor body to advance and
exit within the stroke range
After pushing the handcart type contactor into the switch cabinet, the following steps shall be
followed:
Insert the handle into the socket and rotate the handle clockwise to push in (counter clockwise to exit).
The stroke is about 200 mm, and it should enter the working position or test position smoothly when it is
opened. Rotate the handle at medium speed for 20 turns. When you hear the "click" position switch
mechanism action sound, it is in place. (avoid damaging the mechanism by excessive force).
Anti misoperation function of chassis
●
Avoiding pulling the insulation contact on-load
10
When the contactor is closed, the chassis car cannot shake. There is a combined brake interlocking
device above the turnover plate of the chassis truck, which presses the turnover plate of the chassis car. If
the contactor is in the test position, the square hole (11) of the lock in the test position will lock the screw
rod, and the chassis vehicle cannot shake; if the contactor is in the working position, the working position
latch (6) will resist the screw, and the chassis vehicle cannot shake, so as to avoid pulling the isolation
contact with load (Fig. 9).
Fig. 9
●
Avoiding closing in earthing position, avoiding on-load earthing
When the grounding switch of the switch cabinet is closed, the interlocking mechanism of the
grounding switch pushes the grounding interlocking parts to move towards the screw, so that the
interlocking parts block the screw, and the chassis vehicle cannot run from the test position to the working
position; on the contrary, if the contactor is in the working position, the grounding switch interlocking
mechanism of the switch cabinet is blocked by the grounding switch related locking plate of the chassis
vehicle, and the grounding switch handle cannot be inserted Operation hole, grounding switch cannot be
closed. So as to prevent closing in the grounding state and grounding with load (Fig. 10).
Fig. 10
11
5.5 Working principle of the counter
The fuse vacuum contactor combination has a six position electromagnetic counter, which is installed
in a closed circuit. After the electrical signal is input into the counter, the electromagnetic force is generated
to make the electromagnetic drive mechanism and the driving digital gear rotate. The decimal counting
method is used to record the operation times of the combined electrical apparatus (Fig. 11).
Fig.11
5.6 Working principle of closing/opening indicator
After each closing or opening operation of fuse vacuum contactor combination apparatus, the closing
and opening indication will make corresponding indication. The mechanical on-off state indicator is fixed
on the contactor with locating pin. When the contactor is closed or opened, the rocker will drive the indicator
rod to move the indicator, where "O" represents opening and "I" represents closing.
5.7 Working principle of state auxiliary switch
The auxiliary switch of the contactor state drives the connecting plate of the auxiliary switch to switch
through the warping plate. When the contactor is closed / opened, the normally open and normally closed
contacts of the auxiliary switch are switched(Fig. 12).
Fig.12
12
5.8 Working principle of the fuse state auxiliary switch
The contactor has two sets of fuse auxiliary switches, two groups of normally open and two groups
of normally closed, one of which is used by customers. When the fuse is fused, the trip mechanism drives
the fuse auxiliary switch to switch. Normally closed contacts have the same status as fuses (Fig. 13).
Fig. 13
5.9 Working principle of chassis position state auxiliary switch
The chassis is equipped with position auxiliary switch. When running to the test position, the small
block on the screw moves the test position cushion block to change the auxiliary switch S8 of the test
position and reset S8 after passing the test position; when the chassis enters the working position, the
small square on the screw moves the copper block of the working position to change the auxiliary switch
S9 and reset when it leaves the working position S9; therefore, the position of the chassis vehicle is
indicated by the change of the position switch On off control of secondary circuit (Fig. 14).
Fig. 14
13
6. Electrical schematic diagram
●
fixed contactor, DC, mechanical holding
●
F-C combination, DC, mechanical holding
14
●
fixed contactor, AC, mechanical holding
●
F-C combination, AC, mechanical holding
15
●
fixed contactor, AC-DC, electrical holding
●
F-C combination, AC-DC, electrical holding
16
7. Dimensions
●
Fixed
●
Handcart
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