Sectionalizers With SECTON Controller

Eswari Electricals Private Limited
Eswari Electricals Private Limited

Application – SE6 Sectionalizers With SECTON Controller

Lower cost option for segmentation of the network

Reduced operating costs

Reduced outage time

Event log and remote control

Reduction in the number of customer complaints

Long service life

Intelligent Controller – SECTON & AUTON

Eswari Electricals Private Limited

Fully integrated automation

Power supply with UPS

Measuremen: Current, voltage, harmonic and wave form capture

Control: Sectionalizer Remote control

Communication facilities: Protocols Transmission Configuration with user friendly software

Dominance of SECTON & AUTON

Comprehensive solution: Recloser / Sectionalizer, Network automation, Network maintenance, High integration level, Wide range of protocols, IEC 870-5-101/104 – DNP3-DNP3/IP.

Wide range of transmission media: Radio, GSM, GPRS, PSTN

Measurement features: Voltage, current, power factor, Power calculation, Harmonics analysis, Fault detection, Protection functionality.

Interfacer – IFR SWS

Eswari Electricals Private Limited

Local and remote control

Communication options

Measurement screens

Local language support

Event log handling

Controller firmware loading

Power quality analysis

Firmware code loader

Launch pad


A sectionalizer is a protective device that automatically isolates a faulted section of line from the rest of the distribution system.

A sectionalizer should not be confused with a recloser, it does not interrupt fault current.

It is used in conjunction with an upstream “recloser” or “circuit breaker”

It counts the interruption created by a recloser during a fault sequence

Sectionalizer is an economic device to improve the reliability of power distribution system used along with recloser or circuit breaker.

Sectionalizer senses current flow above the preset level, as the recloser opens to de-energize the circuit the sectionalizer counts overcurrent interruption.

The sectionalizer resets after a high current pulse if it detects no further high current pulses within its resets time.

Therefore, if proper sectionalizing isto occur for a permanents fault beyond the sectionalizer.

The line sectionalizer operates its contacts only during the time that the circuit is de-energized.

Sectionalizers are (beside overcurrent relays, reclosers and fuses) one of the most used for distribution system protection

After a pre-arranged number of circuit openings, the sectionalizer contacts are opened by means of pre-tensioned springs. This type of sectionalizer can be closed manually.

Sectionalizers with spring charged toggle operating mechanisms are more flexible in operation.

The load current is measured by means of CTs, and the secondary current is fed to a control circuit that counts the number of operations of the recloser or the associated interrupter and then sends a tripping signal to the opening mechanism.


Nominal current and number of counts settable by user

Independent of the time-current curve

Counts are registered by the sectionaliser only when fault current flow through the sectionaliser had been detected prior to the operation of the backup device

Modern day sectionalisers are programmed to sense the current, decide as a fault.

The upstream protective device operation (opening) is detected by the zero current flow through it and then operates .


Sectionalizers simplify the job of restoring service after a fault has been removed since they do not require replaceable elements - such as fuse links - and they may be reclosed with a simple hook stick.

Automatic sectionalizers are cheaper than auto recloser

They may be employed for interrupting or switching load within their rating.

If the faults persist, sectionalizers will trip to isolate the faulty circuits.

Increased reliability and continuity of service, discriminating between temporary and permanent faults.

Inventory reduction: one size fits all current ratings.

Reduces maintenance time: field configurable and resettable.

Reduced operation costs.

Improvement of SAIFI and SAIDI indexes.

S.No Particulars 11KV 22KV 33KV
1 Rated Voltage 11KV 22KV 33KV
2 Highest System Voltage 12KV 24KV 36KV
3 Rated Current 630A 630A 630A
4 Rated Short Time withstand current 12.5KA for 3 Sec 12.5KA for 3 Sec 12.5KA for 3 Sec
5 Rated peak withstand current 31.25KA 31.25KA 31.25KA
6 Rated Insulation Level: Rated One Minute Power Frequency wet withstand Voltage
(i) To Earth and Between Poles
(ii) Across Isolating Distance
Rated One Minute Power Frequency Dry withstand Voltage
(i) To Earth and Between Poles
(ii) Across Isolating Distance
28KV 32KV
28KV 32KV
50KV 60KV
50KV 60KV
70KV 80KV
70KV 80KV
7 Lightning Impulse Withstand Voltage:
(i) To Earth and Between Poles
(ii) Across Isolating Distance
75KV 85KV 125KV 135KV 170KV 180KV
8 Arc Extinction Medium SF6 Gas SF6 Gas SF6 Gas
9 Insulation Medium SF6 Gas SF6 Gas SF6 Gas
10 Closing Opening Time <0.7 Sec <0.7 Sec <0.7 Sec
11 Nominal Pressure ( kgf/cm2) 1.0 1.0 1.0
12 Leakage Rate(cc/sec) 1.1x10^-6 1.1x10^-6 1.1x10^-6