Entec EVR Manuel utilisateur
EVR AUTOMATIC RECLOSER
USER’S MANUAL
ENTEC
ELECTRIC & ELECTRONIC CO., LTD
ENTEC
Release Date: Jan 2006 / Manual Revision: 1.10
Copyright © 2002 by ENTEC ELECTRIC & ELECTRONIC CO., LTD all right reserved. Forerunner Distribution & Automation
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TABLE OF CONTENTS
GENERAL GUIDANCE............................................................................................................ 5
1. INTRODUCTION ...........................................................................................................6
2.
STANDARD RATINGS ..................................................................................................
7
3.
CONSTRUCTION...........................................................................................................8
3.1. INTERRUPTER................................................................................................................10
3.2. MAGNETIC ACTUATOR................................................................................................ 10
3.3. BUSHING......................................................................................................................... 11
3.4. MANUAL TRIP/LOCKING DEVICE ............................................................................. 12
3.5. SF6 GAS ........................................................................................................................... 13
3.5.1. General................................................................................................................... 13
3.5.2. Specification of Sulphur Hexa Fluoride Gas (SF6)................................................ 13
3.5.3. SF6 gas pressure-Temperature Curve..................................................................... 14
3.6. MOLECULAR SIEVE...................................................................................................... 14
3.7. BATTERY AND BATTERY CHARGER ......................................................................... 15
3.8. CONTROL CUBICLE...................................................................................................... 16
3.9. AUXILIARY POWER SUPPLY....................................................................................... 17
3.10. GAS FILLING VALVE................................................................................................... 20
3.11. ACCESSORIES...............................................................................................................20
4.
PACKING, HANDLINGAND STORAGE .................................................................21
4.1. PACKING AND DESPATCH ........................................................................................... 21
4.2. UNPACKING AND HANDLING .................................................................................... 21
4.3. RECEIVING ..................................................................................................................... 22
4.4. STORAGE ........................................................................................................................ 22
5.
INSTALLATION...........................................................................................................23
5.1. INSPECTION BEFORE INSTALLATION...................................................................... 23
5.1.1. General................................................................................................................... 23
5.2. TESTING .......................................................................................................................... 23
5.2.1. Gas pressure ........................................................................................................... 23
5.2.2. Battery check.......................................................................................................... 24
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5.2.3. Contact life of vacuum interrupter..........................................................................24
5.2.4. Resistance test on current carrying main circuit.....................................................24
5.2.5. High voltage insulation test....................................................................................24
5.2.6. Operation test .........................................................................................................25
5.2.7. Secondary current injection test .............................................................................25
5.3. INSTALLATION...............................................................................................................25
5.3.1-1. Standard pole mounting of recloser tank.............................................................25
5.3.1-2. Substation mounting frame.................................................................................28
5.3.1-3. Surge Arrester mounting frame...........................................................................29
5.3.2. Control cubicle .......................................................................................................30
5.3.3. Earthing..................................................................................................................31
5.3.4. High voltage connection.........................................................................................33
5.3.5 Bushing....................................................................................................................33
6. RECLOSER OPERATION..........................................................................................35
6.1. GENERAL ........................................................................................................................35
6.2. OPERATION PROCEDURE............................................................................................35
7. MAINTENANCE ..........................................................................................................36
7.1. GENERAL ........................................................................................................................36
7.2. DISMOUNTING OF RECLOSER ...................................................................................36
7.3. CONTACT LIFE OF VACUUM INTERRUPTER...........................................................36
7.4. SF6 GAS REFILLING......................................................................................................38
7.4.1. General ...................................................................................................................38
7.4.2. Refilling procedure.................................................................................................38
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GENERAL GUIDANCE
ENTEC automatic vacuum recloser hereinafter as EVR is designed to operate after installation on
an outdoor pole and substation. This product consists of the minimum number of components to
achieve maintenance free, maximum safety and endurance.
To ensure the maximum life and the best quality of operation, operate EVR in accordance with the
instruction manual and keep the following guidance.
Be fully aware of the instruction manual before operating EVR.
Safety check is required before installing, operating, and maintenance EVR. After installation,
connect AC 110/220V from the distribution line to the CONTROL CUBICLE and run a test
operation.
If works need to be done after opening the control CUBICLE middle cover, turn the main circuit
breaker (MCB) OFF to avoid any accident due to the high voltage.
Avoid any flame work such as welding and brazing on EVR because the main tank is filled with
SF6 gas for insulation.
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1.INTRODUCTION
This manual contains the information required for installation, operation, and maintenance of
ENTEC EVR Automatic Recloser. EVR is designed to be powered from AC 110/220V low voltage
distribution line. EVR complies with the international standard specifications and ratings.
EVR consists of the corrosion-resistance stainless steel tank (main tank) and the control cubicle,
which are connected by separable shielded cable that is insulated. The main tank contains the
vacuum interrupter and the magnetic actuator.
Although the main tank can be disconnected from the Control Cubicle, none of them can be
exchanged with other products. If replacement is required, please consult with the ENTEC E&E Co.
Ltd.
The inside of the main tank is filled with SF6 gas for insulation and the control cubicle is equipped
with two of DC 12V batteries in series together. Batteries supply DC 24V control power to a
control circuit after rectifying from low voltage AC source. General configuration of recloser is
shown as below.
Control cable
receptacle
ON-OFF Indicator
Earth terminal
Polymeric or
Porcelain bushing
Manual trip &
locking device
LOCK
TRIP
H.V Connector
Pressure rupture
device
Gas filling
valve
Figure 1-1. Recloser Lay-Out
Table 1-1. Dimension(mm)
kV A B C D
15kV 715 375 925 300
27kV 760 460 1020 300
38kV/630A 841 475 1058 320
38kV/800A 841 475 1078 320
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2.STANDARD RATINGS
The standard ratings of EVR Recloser are as follows;
Table 2-1. STANDARD RATINGS
Maximum system voltage 15kV 27kV 38kV
Rated frequency 50/60Hz 50/60Hz 50/60Hz
Rated continuous current 630A 630A 630/800A
Rated short circuit interrupting current 12.5/16kA 12.5/16kA 12.5/16kA
Rated making current 32.5kA
(peak value)
32.5kA
(peak value)
32.5/ 40kA
(peak value)
Power frequency withstand voltage
- dry
- wet
50kV(1 min)
45kV(10 sec)
60kV(1 min)
50kV(10 sec)
70kV(1 min)
60kV(10 sec)
Rated impulse withstand voltage 110kV BIL 150kV BIL 170kV BIL
Mechanical operation life 10,000 operations 10,000 operations 10,000 operations
Auxiliary power supply AC110/220V external power sources
Control circuit voltage DC 24V DC 24V DC 24V
Protection current transformer (CT) ratio 1000:1 A 1000:1 A 1000:1 A
Weight
- main tank
- control cubicle
160kg
85kg
170kg
85kg
210kg
90kg
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3.CONSTRUCTION
The Recloser can be mounted on an outdoor pole by assembling a mounting bracket connected to
the top of main tank and also installed at substation with substation mounting frame. The vacuum
interrupter, magnetic actuator, and current transformer (CT) are contained in the TIG-welded main
tank and filled with SF6 gas for the insulation of recloser main tank.
The interruption of Recloser is performed by the vacuum interrupter and SF6 gas is used to insulate.
The recloser filled with SF6 gas does not produce any by-products by arc during interruption. Thus
it maintains permanent insulation capability and prevent corrosion of the main tank components.
The Recloser interrupter arranged with the 3-phase dielectric mold frame, consists of the vacuum
interrupter and the trip spring with the same distance. The driving arm connected at the end of
moving contact transfers a driving force of the magnetic actuator to the interrupter for close and
open operation.
The 6 bushings on the top of main tank can be supplied with porcelain, polymeric(E.P.D.M. rubber
or silicone rubber) bushing upon to user's request. The current transformer (CT) is installed at the
bushing connected at the fixed contact of interrupter in the main tank, and CT can monitor phase
fault currents, earth fault currents and load currents, and send signals to the control electronics.
If the control cable of CT is disconnected at both end, the CT is automatically shorted by the
automatic CT protection circuit.
The manual Trip/Locking device is positioned on the front side of main tank. The indicator points
an interrupter's open/close status and the operation counter are located at the bottom of main tank.
The Recloser operation sequence is performed by the microprocessor-based relay. The relay is
installed in the control cubicle protected by rain-proof case. The Recloser immediately performs a
preset operation sequence to re-close when a phase/ground fault current is higher than the preset
value.
If a fault current is not cleared at the end of full protection sequence, the Recloser will be lockout
as tripped, and remains until the next close operation. If a fault current is cleared during the
protection sequence, the Recloser is closed, and then returns into sleep mode after the reset time.
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When a fault current is detected, the recloser operates the pre-set full protection sequence again.
EVR is powered by AC 110/220V low voltage distribution line source without an additional
transformer and is designed to consume low energy to operate reclosing and remote control. Thus
EVR does not need any extra cost for installation of additional transformer, in case, low voltage
source by utility is available.
In case that low voltage power source is not available, the recloser is fitted with an auxiliary
voltage transformer to supply auxiliary power to the control cubicle.
During open and close operations, the relay sends the pulse type current to the open and close coils,
and the magnetic force is induced by those coils and moves the plunger of the magnetic actuator.
This driving force is transferred to the vacuum interrupter, which makes contact point tripped or
closed. During trip and close operations, arc is produced and rapidly extinguished in the vacuum
interrupter. The relay setting in control circuit can be modified at the control panel, a PC or
remotely controlled communication method. For more details, refer to EVRC2A manual.
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3.1. INTERRUPTER
The vacuum interrupter of the recloser can provides versatilities to operate trip/close with the
ratings and capacity based on the fully capable of interruption.
The closing status of the contacts is held by contact springs that provide the required force at all
condition of contact wear.
As a vacuum interrupter is fully sealed for the lifetime of the recloser and it requires only a small
contact stroke and low interruption energy. it is suitable for application of magnetic actuator
mechanism and also vacuum interrupter has a capability of a large number of operations, which is
ideal for the recloser’s application.
Thus, vacuum interrupter with magnetic actuator provides a high reliability in operation and
minimum maintenance if the replacement of the vacuum interrupter is required with any reasons,
please consult with manufacturer.
Fixed busbar
Vacuum interrupter
Moving busbar
Opening spring
Figure 3-1. Recloser Interrupter
3.2. MAGNETIC ACTUATOR
The magnetic actuator designed by the newest technology delivers force to the interrupter. Since
the magnetic actuator consumes low energy, actuator switching operation can be simply achieved
through rectifying circuit with the low voltage AC 110 or 220V supplied from an external power
sources and battery charged with the low voltage sources.
Ce manuel convient aux modèles suivants
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