—HIGH VOLTAGE PRODUC TS

Horizontal double break disconnectorType eDB, up to 420 kV

• Minimized contact resistance• Easy and quick erection • Low friction design for

smooth operation • Ice breaking capacity • Strong rotary pedestals • Minimal maintenance

2 H O R I ZO NTA L D O U B LE B R E A K D I S CO N N EC TO R PR O D U C T B R O CH U R E

— ABB offers a wide range of reliable and energy efficient disconnectors to meet the requirements of different sites and network conditions. The disconnectors range from 72.5 kV to 420 kV. ABB disconnectors are designed as per IEC 62271-102 and IEC 62271-1 standards.

3

— Table of contents

04 Disconnectors from ABB

Applications

Regulations

05 Maximum reliability and

minimal maintenance

06 Technical data

07 Mode of operation

08 Easy installation

Main dimensions (mm)

Series installation

4 H O R I ZO NTA L D O U B LE B R E A K D I S CO N N EC TO R PR O D U C T B R O CH U R E

Applications A mechanical device for providing isolation of power equipment from the network, a disconnector is suitable for switching very small currents or where no significant change in voltage occurs across the terminals. The option of earthing sections of power systems can be made available by providing each disconnector pole with one or two earthing switches.

Regulations The eDB Disconnectors are designed as per IEC 62271-102 and IEC 62271-1 standards. Other international regulations can be met on request. Type tests on the disconnectors are carried out by accredited testing laboratories in accordance with the latest regulations. Comprehensive electrical and mechanical routine tests are carried out on the poles and operating mechanism of each disconnector, ensuring world-class quality.

—Electric sub-station

—Disconnectors from ABB ABB HV Disconnectors are in operation across the world in extreme and adverse conditions for decades, providing maintenance-free service with the highest benchmarks for operational reliability.

5

—Maximum reliability and minimal maintenance

Minimized contact resistance (energy efficient solution) The current carrying aluminium conductors have no joints to minimize circuit resistance.

No external springs in contact fingers for maximum reliability The contact fingers of the moving contacts of disconnector type eDB are designed from special conducting material and without external springs for increased reliability.

Easy and quick erection The current carrying conductors and rotary pedestals are designed for easy adjustment and alignment.

Low friction design for smooth operation Maintenance-free linkages with stainless steel rod-end bearings require less drive power for operation and provide smooth motion transmission without any disturbance in the settings. (Corrosion – free electrical and mechanical joints)

Dead centre interlocking for reliability under extreme conditions The dead centre interlocking of operating mechanisms ensures that there are no inadvertent changes in the open or close switching position even under extreme external conditions such as storms, earthquakes etc.

Superior design of mechanical interlock The mechanical interlock between the earthing switch and main blade is designed in such a way that there is no scope for malfunction.

Ice breaking capacity The disconnectors are capable of operating under severe ice conditions.

Strong rotary pedestals This ensures that the deflection remains unchanged at high mechanical loads.

Suitable for a wide range of environmental conditions The disconnectors can operate in a wide range of temperatures as well as under polluted environmental conditions.

Minimal maintenance Superior material and lubricant used in the encapsulation of the pedestals makes the disconnectors practically maintenance-free.

Design based on cutting-edge technology and experience The horizontal double break disconnectors type eDB consist of a steel base frame with one rotary pedestal, insulators, current carrying conductors (current path) and driving mechanisms. Steel components are hot dip galvanized to protect against atmospheric influences. Each of the three phases of the disconnector consists of one insulator mounted on maintenance-free, sealed rotary pedestal and two support insulators which support terminal pads and fixed contacts which are carried by the steel base frame. The current transfer takes place between two stationary terminal pads. When closed, the contact fingers glide over the fixed contact, which establishes connection between the high- voltage terminal pads. Flat terminal plates can be provided as per DIN standard 46203, NEMA or any other standard.

—02 Fixed contact and terminal pad of 1600 A eDB

—02

6 H O R I ZO NTA L D O U B LE B R E A K D I S CO N N EC TO R PR O D U C T B R O CH U R E

—Technical data

—03145 kV eDB disconnector

Voltage 72.5 kV * 123 kV 145 kV 170 kV 245 kV 300 kV 362 kV 420 kV

Type designation eDB72.5 eDB123 eDB145 eDB170 eDB245 eDB300 eDB362 eDB420

Rated voltage (Ur) kV 72.5 123 145 170 245 300 362 420

Rated frequency (fr) Hz 50/60

Rated normal current (Ir) A 1600, 2500

Rated short-time withstand current, rated duration of short circuit (Ik,tk)

kA, s 40/50/63, 1***

Rated peak withstand current (Ip)

kAp2.5x Ik (for 50 Hz) / 2.6x Ik (for 60 Hz)

Basic insulation level

Power frequency withstand voltage for 1 minute

To earth and between poles kV 140 230 275 325 460 395 450 520

Across the isolating distance

kV 160 265 315 375 530 435 520 610

Lightning impulse withstand voltage

To earth and between poles kVp 325 550 650 750 1050 1050 1175 1425

Across the isolating distance

kVp 375 650 750 860 12001050 (+170)

1175 (+205)

1425 (+240)

Switching impulse withstand voltage

To earth and between poles kVp - - - 850 950 1050

Across the isolating distance

kVp - - -700 (+245)

800 (+295)

900 (+345)

* 36 kV on demand

** Higher currents on request

*** 3s for 40 kA

—03

7

—Mode of operation

The disconnector and earthing switch are operated via independent operating mechanisms.

The operating energy from the operating mechanism of the disconnector is transmitted via operating rod to the rotary pedestal. The three phases of the disconnector are connected by gang operating linkages for three phase operation. During opening and closing operation, the current path, mounted on rotary insulator rotate through an angle of approximately 76°.

Operating mechanismAll disconnectors can be supplied by manual or motor operated mechanism, as required by the customer. Each three-pole disconnector or earthing switch group requires only one /individual operating mechanism(s). The coupling rods between the individual poles can be continuously adapted.

Operating mechanisms contain auxiliary switches for control and signalling as well as provisions for electrical interlocks. Three-phase operation is conducted via mechanical or electrical gang operation.

For maximum reliability, the main contacts of the disconnector and earthing switch pass through the dead centre positions shortly before they reach the end positions. This prevents accidental opening or closing of the units due to external influences (e.g. short-circuit, storm, earthquake).

InterlocksThe disconnector and earthing switch (when supplied) are mechanically interlocked. In operating mechanisms, a blocking magnet can be installed as an additional interlocking facility, which in disconnected condition, makes operation of the operating mechanism impossible.

Earthing switch unitThe earthing switch unit, an optional assembly, consists of a hinged-type earthing switch fixed at the base frame. The unit can be mounted on either of the contact sides or on both sides as required.

In case of the earthing switch, the operating energy is transmitted to the earthing switch shaft. The tubular contact arm swings upward when the unit is closing.

—05

—04

—04Linkages with spherical bearings

—05Bearing on frame assembly

8 H O R I ZO NTA L D O U B LE B R E A K D I S CO N N EC TO R PR O D U C T B R O CH U R E

The disconnectors are delivered in following assemblies - lower part with rotary pedestals and operating rod, current path, support insulators and operating mechanism. As all mechanical adjustments are carried out in the factory, only mounting of the assemblies, installation of the coupling rods between the poles, connection of the high-tension

leads and the electrical connection leading to the operating mechanisms is required at the site. Stud bolts are provided to compensate rapidly and exactly any inaccuracies in insulator position caused due to tensile forces.

—Easy installation

Pmin Pmin

70°

—Series installation

—Parallel installation

Main dimensions as in drawing (mm / inch)

DimensionsVoltage (kV) Type

72.5eDB72.5

123eDB123

145eDB145

170eDB170

245eDB245

300eDB300

362eDB362

420eDB420

ASupport insulator distance (mm)

1230/(484) 1720/(677) 1720/(677) 2200/(866) 2800/(1102) 2800/(1102) 4800/ (1890) 4800/(1890)

B Base frame length (mm) 1510/(594) 2000/(787) 2000/(787) 2600/(1024) 3200/(1260) 3200/(1260) 5230/(2059) 5230/(2059)

C Insulator height (mm) 770/(303) 1220/(480) 1500/ (591) 1700/(669) 2300/(906) 2300/(906) 3650/(1437) 3650/(1437)

D Disconnector height (mm) 975/(384) 1665/(656) 1745/(687) 1930/(760) 2550/(1004) 2550/(1004) 3960/(1559) 3960/(1559)

EEarth switch attachment le ngth (mm)

375/(148) 375/(148) 375/(148) 400/(157) 400/(157) 400/(157) 450/(177) 1100 / (433)

P

Minimum distance between poles (mm)- Parallel arrangement 1750/(689) 1750/(689) 2330/(917) 3520/(1386) 3430/ (1350) 4755/(1872)- Series arrangement 2700/(1063) 3150/(1240) 3530/(1390) 4920/(1937) 5350/(2106) 6925/(2726)

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—ABB India LimitedHigh Voltage products Maneja, Vadodara 390 013, IndiaPhone: +91-265-2638930Email: pt-exports.inabb@in.abb.com

abb.com/highvoltage

© Copyright 2019 ABB. All rights reserved. Specifications subject to change without notice.