SF6 GAS INSULATED

POLE MOUNTED
VIT Load Break Switch

SPGAS-26
24kV,630A

PT.SURYA TOTAL PERTIWI

INDUSTRY & SUPPLIER
JL.Danau Sunter Utara Blok B.1A/15 Sunter Agung – Jakarta Utara 14350
No. Hp. 082125885832 / E-mail: info@suryatotalpertiwi.com website : www.suryatotalpertiwi.com
Ratings & Specifications

Products Type SPG-15-6 SPGAS-26 SPGAS-36

Basic Ratings
Maximum System Voltage 15 kV 25.8 kV 38 kV
Rated Continuous Current 630 A 630 A 630 A
Rated Frequency 50/60 Hz 50/60 Hz 50/60 Hz
Short Time Withstand Current ( rms) 20 kA/ 4sec 25kA/ 1sec 20 kA/1 sec
Making and Breaking Capacity
Mainly Active Load Current 630A 630A 630A
Number of Load-break Operations 400 times 400 times 400 times
Short-circuit Making Current (peak) 50 kAp 32.5kAp 32.5 kAp
Number of Making Operations 5 times 5 times 5 times
Cable Charging Current 10A 25A (200 A) 20 A
Line Charging Current 1A 1.5A 2A
Closed Loop Circuit Current 630 A 630 A 630 A
Transformer Magnetizing Current 22A 22A 22A
Power Frequency Withstand Current Test
Wet Condition- 10 sec
45 kV 50kV 70 kV
(Ph- Ph, Ph-Eth, Across Interrupters)
Dry Condition - 1 min
50 kV 60kV 70 kV
(Phase to Earth, Phase to Earth)
Dry Condition - 1 min
50 kV 60kV 80 kV
( Across Interrupter )
Impulse Withstand Current Test ( 1.2 x 50 μ s )
Phase to Phase, Phase to Earth 110 kV 150kV 170 kV
Across Interrupter 125 kV 150kV 195 kV
Other Ratings & Specifications
Internal Arc Test 20kA /0.1 sec 20kA /0.1 sec 20kA /0.1 sec
Arc Extinction Medium SF 6 Gas SF 6 Gas SF 6 Gas
Insulation Medium SF 6 Gas SF 6 Gas SF 6 Gas
Creepage Distance (Porcelain) 550 mm 740 mm 960 mm
Creepage Distance (Silicon) 615 mm 800 mm 1055 mm
IP Level 54 54 54
Operation Performance
Closing / Opening Time (A Type) < 0.7 sec < 0.7 sec < 0.7 sec
Open < 50 ㎳ < 50 ㎳ < 50 ㎳
Closing / Opening Time Close < 0.7 sec < 0.7 sec < 0.7 sec
(B Type) Spring
< 0.4 sec < 0.4 sec < 0.4 sec
Charge
Mechanical Operations (Guaranteed) 10,000 times 10,000 times 10,000 times
Operating Temperature (*Manual Type) -25 (*-40) ~ 70° C -25 (-40) ~ 70° C - 25 (-40)~ 70° C
Gas Pressure
Nominal Pressure (kgf/cm2 G, at 20°C)) 1.0 1.0 1.0
2
Bursting Pressure (kgf/cm G) 4~6 4~6 4~6
2
Minimum Gas Pressure (kgf/cm G) 0.1 0.0 0.0
Leakage Rate (cc/ sec) 1.1 x 10 -7 1.1 x 10 -7 8.2 x 10 -7

* SPG-15-6, SPGAS-26 and SPGAS-36 have the contacts of the same material, isolating distance and structure.
* Electrical and mechanical specifications and ratings of AUTOMATIC, MANUAL Type Products are all the same if a Switch belongs to
the same voltage class.
 Introduction

SPGAS is 3 phase, SF6 gas insulated load break switch (LBS) for overhead power
distribution system. SPGAS series switches have been designed to meet the
growing requirements for oil-less, maintenance free, long life, maximum safety
and all-in-one design for application to Distribution Automation System (DAS) or
SCADA System.

SPGAS series switches have been fully certified in accordance with IEC 60265-1,
60694 or their equivalent standards to meet or exceed customer specifications.
SPGAS switches are suitable for operation under the following conditions.

□ Ambient air temperature : -25~70 ℃ (MANUAL Type: -40~70 ℃)

□ Maximum Radiation : 1,100 W/m2
□ Relative humidity: Up to 95% RH
□ Wind Velocity: 45 m/sec
□ Altitude: Up to 2500m above Sea Level
□ Climatic condition: Tropical Climate
□ Pollution Level: Heavy Pollution (ESDD 0.35 mg/cm2)

Prominent Features

All-in-one Design for SCADA system

◼ Built-in CT's and Voltage Sensors are all fitted in SPGAS switching tank.
The SPGAS Switch can be easily applicable to DAS or SCADA System without any
extra costs.

Oil-less, Maintenance Fee

◼ Using SF 6 gas as an insulating and interrupting medium eliminates the

necessity for maintenance.
◼ Compact operation mechanism assembly is located inside the thoroughly sealed
tank case. Therefore, the mechanism assembly is protected from corrosion and
every environmental attack.

Robustness and Long Life

◼ Stainless steel Tank Case with more than 3 mm thickness is designed for its
maximum robustness and minimum welding line to minimize corrosion.
◼ The robust ‘tulip’ type contact made of copper-tungsten tips ensures long
contact life.
◼ Advanced TIG welding technique on stainless steel tank and double sealing
technique with EPDM rubber for bushing mounting shows 0.02% gas leakage rate
per year and 2,500 years service life.
◼ SPGAS Switch has so robust mechanical construction that it experienced 5,000
times mechanical operation test and 10,000 times operations are guaranteed.

Quick Close/Open, Operator-independent Mechanism

◼ The simple toggle action spring mechanism shows operator-independent quick

close, quick open operation (below 0.7 sec operation time when electrical
operation).
A Type : Close < 0.7 sec, Open < 0.7 sec
B Type : Close < 0.7 sec, Open < 40 ㎳, Spring-charge < 0.4 sec
◼ Driving motor is coupled with manual operating handle through the medium of
one way rotating bearing, therefore, manual operation is guaranteed even
though driving motor gets out of order.

Reliable Insulation and Interruption Capacity

◼ Experienced and mastery breaking part design including pure puffer principle
makes the arcing time just half a cycle. Due to this, decomposition of SF6
gas from the arc is negligible and the insulation capacity of SF6 gas
doesn’t decrease during all service life.
◼ With the breaking part design, all insulation and interrupting ratings of
the switch are guaranteed at atmospheric gas pressure (0.0 kgf/cm2G).
◼ The heavy duty tulip type contacts made of copper-tungsten arc resistance
material ensures 5 times making current test and 400 times load current
switching test.

Safety Devices

◼ In the event of an internal arc fault, Safety Bursting Membrane on the rear
side of the SPGAS Switch ruptures to release over-pressure gas. This
eliminates the risk of explosion.
◼ Since SPGAS switch is not oil-filled, a major fire hazard is eliminated. In
addition, two additional safety devices are available in the SPGAS switch.
Firstly, Manual Lockout provides lockout to the operating mechanism when it
is pulled down to the lock position using a hook stick.
Secondly, Low Pressure Interlock or Low Pressure Sensor locks the operating
mechanism or gives signal to the controller if the gas pressure in the tank
drops below a pre-set value.
◼ SPGAS switch has passed Internal Arcing Test with 20 kA for 0.1 sec in
accordance with IEC 62271-200 and Insulation Coordination Test in accordance
with IEC 60071-1.

Detailed Descriptions

Bushing

◼ Porcelain bushing is standard. It is horizontally mounted to the enclosure

tank. The inside bushing hole walls are treated with semi-conductive
painting to shorten the gap between the copper stud and the bushing wall.
This enables the switch to have good RIV characteristics and also good
partial discharge control.
◼ Alternatively, epoxy bushing and silicon rubber boots are also available.
Silicon rubber boots are put on the epoxy bushing to increase the voltage
insulation and to protect inner bushing from external impact.

Bushing Terminal

NEMA type flat bare terminal made of copper alloy is standard for bushing
terminal. According to local environments, customers can choose alternatives as
following.
◼ Standard NEMA type flat bare terminal
◼ Universal Clamp Type Terminal
◼ Eyebolt Type Terminal

Tank Case
SUS 304 Tank Case with more than 3 mm thickness is designed for its maximum
robustness. Therefore, even at a maximum bursting pressure of the tank (4-6
kgf/cm 2 G), switching operation is not disturbed. And its minimum welding line
on stainless steel tank case result in minimum corrosion.

SF6 Gas
◼ The insulating medium of SPGAS Switch is SF6 gas whose quality meets the
requirement of IEC60376. The leakage rate of the SF6 gas is less than 1.0 ×
10-6 cc/sec; In other words, 0.02% per year.
◼ To maintain the insulating capacity of SF6 gas during the service life of
Switch, a moisture and de-composed gas absorber is also contained in the
switch tank.

Operation Mechanism
◼ The simple toggle action spring mechanism enables the switch to have
operator-independent quick close, quick open operation. The electrical
operation time is below 0.7 sec, and close/open operation can be done more
than 500 times with fully charged battery.
◼ Driving motor is coupled with manual operating handle through one way
rotating bearing, therefore, during a manual handle operation (required
force: 17- 18 kg), the driving motor is actually disconnected with driving
shaft. This means that manual operation is guaranteed in spite of the
driving motor's trouble.

Motor Box

Driving Motor, Auxiliary Contacts, and Protection PCB are located inside the
Motor Box and these devices are connected to the control unit through control
cable and connector. Stainless steel Motor Box is thoroughly welded underneath
the Tank Case.

Protection PCB

The CT's are connected to automatic CT shorting protection PCB installed in the
Motor Box, passing through the rubber gasket sealing.
◼ Automatic CT shorting device protects the CT's when the CT cable is
disconnected.
◼ This PCB also protects control circuit from electromagnetic disturbance as
like surge voltage.

Interrupting Parts

◼ SF6 Gas provides excellent load breaking capacity, high insulating ability
and invincible arc-extinguishing performance. Therefore, the arcing time is
just half a cycle. Due to this extremely short arcing time, the
decompositions of SF6 gas are negligible, even after duty test. And the
insulation and interrupting ratings are guaranteed at atmospheric gas
pressure (0.0 kgf/cm 2G).
◼ There is no plastic insulating material between open contacts, so there is
no problem caused b y plastic material's deterioration by arc or leakage
current.
◼ Unique puffer principle is applied. The compressed SF6 gas concentrates to
the arc through the nozzle and then exhausts it, condensing and cooling the
arc plasma.
◼ The robust tulip contacts comprised of nine(9) piece copper-tungsten tips
have five(5) times making operation and 1000 times load current breaking
 capacity guaranteed (400 times tested).

CT’s and Voltage Sensors

◼ CT’s and Voltage Sensors are installed inside the tank case. CT’s and
Voltage Sensors are connected to control unit after passing through gas
sealing and Protection PCB.
◼ Capacitive Voltage Sensor is a standard. But Resistive Voltage Sensor is
available instead of it if more precise metering is required. Resistive
sensor has ±0.5%, Capacitive has ± 3% accuracy.
◼ Accurate ZCT(Zero phase CT) is available for sensitive earth fault and high
impedance fault protection.

Safety Bursting Membrane

◼ Safety Bursting Membrane bursts at a pressure of 4- 6 kgf/cm2.G and release

the excessive gas pressure(caused by internal fault) to outside of the
enclosure tank, before the tank or bushings are destroyed.
◼ The membrane is located in opposite side of the manual operating handle and
sends out the excessive gas in the safe direction.
◼ If the bursting membrane operates, the SF6 gas is completely exhausted and
Low Pressure Interlock or Low Pressure Sensor prevents any electrical and
manual operation.

Manual Lockout

◼ If it is pulled down, it is toggle-acted, keeps the present position,

mechanically locks out both close and open operation and it gives dry
contact to the control.
◼ When it is pushed up, it releases the lockout function and gives dry contact
to the control.

Low Pressure lockout and Indicator

If the pressure sensor senses low gas pressure, it activates the low pressure
target and also the Low Pressure Lockout to prevent any switch operation by both
electrical and mechanical methods.

Low Pressure Sensor and Optional Gas Pressure Gauge

The low pressures sensor gives a dry contact information to the control for
lockout or alarm. And the gas pressure can check through the optional pressure
gauge.
Optional Parts and Accessories

◼ Low Pressure Interlock

◼ Low Pressure Target
◼ Lightning Arrester Plate
◼ Gas Pressure Gauge
◼ Bird Guard Cap
◼ Operation Counter
◼ Eyebolt Type Bushing Terminal or Clamp Type Bushing Terminal
◼ Epoxy Bushing and Silicon Rubber Boots
◼ Mold Cone and Lead Wire
◼ Mounting Bracket (Cross Arm)
◼ Low Pressure Sensor (For Automatic Type)
◼ Internal Voltage Sensors (For Automatic Type)
◼ Ground Actuator (For Manual Type)
 Dimension & Part Names – Automatic Type
A Type
B Type

The dimensions in above table are applicable to all the operation types, except
for the Manual Type product’s height (D). The height (D) of Manual Type Switch
is 490 mm regardless of voltage class. And, the dimensions in above table are
based on Porcelain Bushing, NEMA Type bare terminal without down-rod ground
actuator.
VIT L6 Control Unit
Overview

The VITL6 VIT LBS control with built-in RTU

function have not only enhanced protection
functions like open conductor, high impedance
fault isolation, but also can identify and
isolate the faulted section and can restore the
service with the coordination of backup circuit
breaker or VIT recloser without communication
system.

It have two(2) setting groups and it can be

changed automatically according to the power
direction.

The VIT LBS can achieve the feeder automation with minimum initial investment
but in the future it can be integrated to the computer system just through
adding a modem.

Functions

◼ Main Protection Function

 Fault indication
- Phase fault / ground fault
- Permanent fault / temporary fault
 Open conductor / loss of phase protection
 Phase synchronization failure detection
 Sectionalizer function
 SEF, HIF protection
 Voltage-current-time controlled protection coordination(VIT)
 Inrush current restraint
 Load encroachment
 Sympathetic tripping restraint
 Directional overcurrent

◼ Measurements

 Magnitude and phase angle of voltages & currents (Fundamental frequency)

 RMS and phase angle of voltages & currents (Fundamental frequency)
 Active, reactive and apparent power for each phase and 3-phase
 Demand current
 Daily maximum current
 Symmetric component
 Power factor
 Frequency
 Phase difference between source and load-side voltage

◼ Control

 Manual LBS switch Open / Close at local or remote (SBO operation)

 Interlocking (Gas low, Handle lock, Sync. Fail, Live Load)
 Battery test
 External Trip and Close
◼ Switch & Control Status Monitoring

 Contact inputs
- Switch Open / Closed
- Gas pressure low
- External AC power loss
- Handle status
- Enclosure door open
 Battery status
 Temperature
 Frequency
 Switch operation count

◼ Event Recording

 Sequential events record

 Fault events report
 Fault wave form report
 Demand Current
 Daily maximum current

◼ Additional Control and Communication Function

 Two(2) selectable setting groups ideal for loop scheme application.

 Hot line tag against unexpected local and remote operation
 Local and remote operation
 RS-232 and RS-485 communication port
 DNP 3.0 level 2 communication protocol for monitoring/ MODBUS for setting,
analysis, control, maintenance and PC communication

Operation
The VITL6 have five(5) operating modes to achieve best coordination.

Customer protection (Watch Dog) mode

- 1 count trip
- Inrush restraint feature
- Overload protection
- DIR SEF protection
- HIF protection
- Pure Open conductor protection
- Under voltage protection (loss of phase protection)

Radial sectionalizer mode

The radial sectionalizer mode is the best choice at the end of the radial
line.
The operation of radial sectionalizer mode is exactly the same with
current, counts controlled sectionalizer.
Max. three(3) sectionalizer can be used according to the numbers of
operation to lockout of the backup protective device.
If the backup device is circuit breaker, one or two counts can be used and
if the backup device is recloser, one, two, three counts sectionalizer can
be coordinated.
But if it is necessary to sectionalize more points, the remaining switches
other than one or two sectionalizers, the control should be set to radial
normal close mode.

Radial sectionalizer mode has the same features with current, counts
controlled sectionalizer but has more functions.
- Directional phase, ground minimum pick up
- Counts one(1), two(2), three(3)
- Counts reset timer in load current condition
- Inrush restraint feature
This feature is activated when the control experience normal current
before current cessation to avoid miscounting because of the inrush
current during reclosing process of back up equipment. If this feature
is activated, the minimum pickup setting raised automatically to the
preset multiply during preset restraint time.
- Count restraint feature using current and voltage element
- One(1) count to open feature directly after manual closing
- Sympathetic count restraint feature.
This feature is activated when the fault is at source side. The
algorithm is based on under voltage, no fault current logics. This
feature desensitizes the pickup level during preprogrammed time
interval.
- Open conductor, high impedance fault isolation
- Over-load protection can protect the line from over-current condition
up to the locking current(900A).
- V0/V1 unbalance voltage protection protects the line from loss of phase,
open conductor and ferro-resonance over voltage

Radial normal close mode

This operating mode is selected to expand the number of switches in radial

line.
The important features are;
- Phase & Ground fault current counting
- Counts reset timer in load current condition
- Close timer
- Load side lockout timer
- Open conductor, high impedance fault isolation

Unlike conventional V-T controlled scheme, only the switch experienced the
fault will be open after counts, so the restoration is much fast and can
give the chance for backup device to clear the temporary fault.
Also the number of switch operation is reduced more than 50% of V-T scheme
through fault current tripping and counts block function.

Loop normal close mode

If this operating mode is selected, it has more functions than radial

normal close mode.
- Loss of voltage lockout feature
- Loss of voltage, fault current counting
- Counts reset timer in load current condition
- Close timer
- Load side lockout timer
- Source side lockout timer
- Open conductor, high impedance fault isolation
- Two setting groups according to the power direction

If there is a fault in loop network, the source and load side is isolated
already before the normal open switch close, so it can avoid unnecessary
outage during normal close switch close into fault condition.
Loop normal open mode.

This operating mode has the same function with loop normal close mode, but
has more function.
- Normal open source side lockout feature
- Normal open close timer
- Two setting groups according to the power direction
- Automatic mode change from normal open mode to normal close mode when
it is closed
- Automatic mode change from normal close mode to normal open mode and
lockout when it is open by manually. This lockout state will be reset
automatically when there are both side voltages.
Pole Top Installation – Automatic Type

PT.SURYA TOTAL PERTIWI

INDUSTRY & SUPPLIER
JL.Danau Sunter Utara Blok B.1A/15 Sunter Agung – Jakarta Utara 14350
No. Hp. 082125885832 / E-mail: info@suryatotalpertiwi.com website : www.suryatotalpertiwi.com