Zy QJ Series Instruction Manual

QJ Series of Gas Relay
Operating Instruction Manual
SHENYANG ZHIYUE ELECTRICAL TECHNOLOGY CO.,LTD
Add: No. 83-13, PUHE ROAD,SHENBEI NEW DISTRICT,SHENYANG,LIAONING
Postcode：110122 Fax：[phone]
Tel：[phone] E-mail:zhiyuedianqi2[email protected]om

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1. summary
Main Application
Gas relay is a kind of protective devices used for oil-immersed transformers and oil-immersed on
Load tap changers.Gas relay(hereinafter referred to as the relay) is installed in the pipe connector
Between a transformer cover and a conservator and may be fitted with an air duct box to real-ize ground
exhaustion and sampling. The relay is contacts act to make connect with control loop
designated and signal in time or automatically cut off the transformer in the case of oil decomposed and gasified
or oil flow implusion caused by internal failure of the transformer.
2. Model
3.Service Conditions
3.1.Permissible operating temperatures:-30~+95
3.2Assembling method: the relayis pipe axis should be parallel to the transformer case cover,
And it is allowed for the end leading to the conservator id higher, however the inclination between
The axis and level surface may not exceed 4%.
4.Structure & Operating Principle
Structure of the Gas Relay
QJ series of relays are basically in similar structure.the relay’s core structure is shown in Fig.1, and the relay’
supper core consists of gas lock 1,gas lock nut 2,probe 3, blocking 4, snap ring(float)5, weights drop 6, guard
board7, magnet 8, connecting terminal9, spring 10, regulating rod11, and dry reed contact12, forming a flow
device that acts on tripping. Gas lock 1 in the cover is used for exhaustion in the case of assembly and extracting
gas out of order. Probe 3 is used to check flexibility and reliability of the tripping mechanism.
1
2
3
4
5
6
7
812
11
10
9
Fig.1
5.Operating Principle of Gas Relay
In the case of normal operation it is full of transformer oil inside the relay．The snap ring(float) is in inclined
QJ
Serial number designed
Gas relay
Pipe diameter (nominal valve) mm
A-with waterproof covers
and gas-collecting box

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position upward as shown in Fig．1．Gas produced by the transformer oil decomposed gathers in upper gas
chamber of the relay and forces the oil surface to reduce，snap ring 5 reduces to a certain position together with it，
and magnet 8 thereon makes dry reed contact 12 suck to connect with the signal circuit to give alarm signal in the
case of slight circuit to give alarm signal.In the case of serious failure inside the transrormer the pressure in the oil
tank rises instantaneously,oil surging occurs and impulses guard board7,and magnet 8 thereon makes sry reed
contace 12 suck to connect with the tripping circuit to give alarm signal and cut off the teansformer.
6.Main Technical Parameters (see List 1, List 2)
6.1 Shock resistance : if frequency of shock (sine wave) is 4 to 2o Hz and acceleration 4g there will be no
accidental operation of the relay.
6.2 Level of protection:the relay is at 1P×5 level of water spray prevention.Note:the product is provided with the
function of flashing.In special cases,to add rain screen needs to be purchased additionally.
6.3 Sealing property:there is no leakage to pressurize 200Kpa for 20 minutes at normal temperature when it is full
of transform oil in the relay.
-List 1 (Contact Rating)
Operating voltage
Working current
AC：220V-250V
0.3A～1A
cos Φ≤0.6
DC：110V-240V
0.3A～1A
S ≤0.005S
- List 2 (Technical Parameters)
Model
Pipe diameter（mm）
Accumulative gas quantity
（ml）
Oil speed setting
range（m/s）
outlet
number
QJ1-50
Φ50
250~300
0.6~1.2
1
QJ1-80
Φ80
250~300
0.7~1.5
1
QJ3-50
Φ50
250~300
0.6~1.2
2
QJ3-80
Φ80
250~300
0.7~1.5
2
QJ4（13）-50
Φ50
250~300
0.6~1.2
2
QJ4-80
Φ80
250~300
0.7~1.5
2
QJ12-80
Φ80
250~300
0.7~1.5
2
QJ13-80
Φ80
250~300
0.7~1.5
2
7.External & Installation Dimensions(see Fig.2 , List 3)
External appearance and dimensions of QJ-50 and 80 are shown in Fig.2,and please refer to List
3for the installation dimensions.
300
250

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Fig.2
-List 3 (Installation Dimensions)
Model
D0
H
L
D
A
d
B
Weight（kg）
QJ1-50
Ф50
220
160
Ф130
120
M12
100
10
QJ1-80
Ф80
220
160
Ф130
120
M12
100
9
QJ4（13）-50
Ф50
215
185
Ф125
125
Ф14
100
11
QJ4-80
Ф80
235
185
Ф160
160
Ф18
100
13
QJ3（QJ12）-80
Ф80
235
185
Ф160
160
Ф18
100
13
QJ13
Ф80
235
185
Ф160
160
Ф18
100
13
8.Installation & Debugging
8.1．Relay Installation
8.1.1. The relay core must be taken out and the bandage used to fix in transit be disassembled berore installation
of the relay leaving factory.Check all of the fastenings if they become flexible, if the snap ring(float) and guard
board move flexibly,and if the contacts open and close reliably.
8.1.2．The relay should be installed in the pipe connector between an oil-immersed transformer’s oil tank and a
conservator.Internal diameter of the pipe connector should be the same with the relay’s pipe diameter(caliber),and
the arrow on the relay must be directed to the conservator. It is allowed that the conservator end is higher however
the degree of inclination may not exceed 4% between the pipe connector’s axis and level surface or the method for
installation of inclined air fitting pipe may be used so that the gas inside the taansformer can smoothly enter into
the relay.
8.1.3．In order to be converient to overhaul the gas relay at site,its installation site needs to guarantee that the
relay’s core may be smoothly taken out of the case.The height for QJ4-25 type to be taken out is 130mm, and that
for QJ4-50 and 80 types 150mm.
8.1.4 .Open the valve in the connecting pipe, take down the gas lock dust cover, and unscrew gas lock nut 2 by
hand (not to take down the nut) after installation to exhaust air till the air nozzle’s oil spill, and then screw down
the nut.
8.1.5．Take down blocking screw 4 in the cover of the relay before open the oil valve if it is necessary to connect
with the air dust box, then srew on joint chair 3, and then connect conduct pipe 6 to joint chair 3 with nut 4 and
cushion 5 (please refer to Fig.2 and 3). The gas block in the relay can be normally used after connected with the
air duct box.
1
234
5
6
to gas collecting box
Fig.3

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8.1.6 The electric connection is show in Fig.4.The relay’s connection may be made in series or in parallel
according to the connection diagram, it may be separately used also,
and users can make wire connection according to different requirements. Screw out press line nut 13 in the case of
threading, piece the cable into the wire connection from the nut hole through rubber ring 14 and screw down nut
13 after connection so that the rubber ring clips the cable and buddle them firmly with adhesive tape to prevent
from water inflow.
1,2:Signal ; 3,4,5:Tripping
Fig.4-1 QJ1\QJ4
1,2:Signal; 3,4,5,6:Tripping
Fig.4-2 QJ3\QJ12
1,2,3,4:Signal ; 5,6,7,8:Tripping
Fig.4-3 QJ13
8.2 Debugging
QJ series of relays is an important protective device of oil-immersed transformer so there are special provisions
stated for an operational unit, for example it may be only brought into service after an inspection department’s
debugging, examination, and issuing cofirming documentation, and accordingly works on debugging and oil
speed examination should be done according to pertinent regulations.
8.3.Gas Volumetric Quantity Adjustment
To change the dry reed contact’s position may adjust volumetric quantity the action of signal contact, volumetric
volume may reduce when the dry reed contact moves upwards and may increase when the dry reed contact moves
downwards. The screwd down and locked firmly after adjustmen.
8.4. Oil Speed Adjustmen
To adjust the regulating rod connected with the spring may change the pulling force of the baffle board spring,
namely the acting oil speed shall be done with a special flow rate checking facilty by professionals.
8.5. Adjustment of the Ballle Baffle Board’s Angle of Rotation
8.5.1.To adjust the backstop screw may change the baffle board’s angle of rotation, namely the distance
(0.5~1.0mm) between the magent and dry reed contact may be adjusted to ensure that the dry reed contact may be

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opened and closed reliably.
8.5.2. To pump gas in from nozzle 1 may cheek action reliability of the “signal”contact.
8.5.3.Take down the probe cover and press probe 2 to check action reliability of the “tripping”contact.
8.5.4 To collect gas sample in service, take down the gas lock dust cover at first, then insert the gas Sample rubber
tube in the air nozzle,unscrew the gas lock nut, and the gas sample may be filled in the bottle. Screw down the nut
after sampling and fix the dust cover.
9. Maintenance and Several
9.1. An inspection of appearance of the relay should be made and an inspection of reliability of the signal circuit
as well as that of the tripping circuit should be made once annually.
9.2. The relay that is in service should be opened up once every two years to made an inspection of its internal
structure and action reliability.
9.3.power frequency and breakdown tests of the relay that in service should be done once every five years.
10.Notice
10.1. The magnet may neither be vibrated acutely nor put in strong magnetic field or an environment at
temperature higher than 100℃or lower than -40℃to prevent from being demagnetized .
10.2. Don not disassemble the dry reed contant at will;espedially dotnot bend the root of the lead to avoid from
being damaged.
11.Promise
When the unit of user uses this product, it must carry on the operation according to the instruction booklet. Our
company carries out three guarantees to the product, when it is in the date of 18 months in installment, and
delivers goods in the company for the user does not surpass for 24 month-long in the deadlines.